57results about How to "Good standing wave characteristics" patented technology

The invention relates to a satellite-borne sparse phased-array multi-beam antenna with a reflector, and belongs to the technical field of antennas. The satellite-borne sparse phased-array multi-beam antenna comprises the offset parabolic reflector, a feed source array and a master control circuit. The feed amplitude and phase of the feed source array are controlled by the master control circuit, and electromagnetic waves radiated by the feed source array are converged via the offset parabolic reflector and then are radiated to space. The quantity of required feed source units of the antenna is low, beams can be subjected to phase control, and the satellite-borne sparse phased-array multi-beam antenna can be widely applied to satellite-borne communication, detection and positioning systems.

The invention relates to a dielectric loaded wideband miniature dual circularly polarized antenna, in particular to a dual circularly polarized antenna which is applied to emit and receive dual circularly polarized waves and wide in frequency band, low in standing wave, high in gain and large in power capability. The dielectric loaded wideband miniature dual circularly polarized antenna comprises a dual circularly polarized radiator (1) and a frustum reflector (2), the dual circularly polarized radiator (1) comprises a medium (3), a square waveguide (4), a step partition (5) and coaxial joints (6 and 7), and the medium is teflon. A partition circular polarizer is used to directly feed, and signals are radiated into the space through dielectric loading and reflection of the reflector, so that good standing-wave characteristics are guaranteed while wave beams are widened, gain and axial ration within a range of pitch angle of + / -65 degrees are guaranteed to meet requirements, and bandwidth is wide. In addition, a symmetric structure is adopted, so that radiating performances of left and right rotating circularly polarized waves are guaranteed to be consistent.

The invention discloses a microstrip array discone composite conformal antenna and aims at providing a composite antenna which is low in profile and easy to conform to a carrier. The antenna is realized through the following technical scheme. The technical scheme comprises the following steps that 1, a metal cone and a metal disc which are fixed on a cavity bottom of a reflection cavity are embedded to form a discone antenna; at least 2*2 rectangular radiation patch units are arranged on the dielectric substrate fixedly connected to the metal disc; the rectangular radiation patch units are connected in parallel and feed through one-in-four microstrip power divider; and the discone antenna and the microstrip array antenna form a composite antenna array which can radiate horizontal omnidirectional L-frequency band vertical polarization signals and can directionally radiate C-frequency band horizontal polarization signals to a zenith. A voltage standing wave ratio VSWR of the composite antenna is smaller than or equal to 2, and an isolation degree S21 of two ports is larger than or equal to 30 dB. The antenna has a multi-frequency broadband characteristic, and can meet requirements ofgain and airspace coverage required by an airborne platform L-band data link function and a radio altimeter function.

The invention discloses an ultrahigh frequency sensor for cable partial discharge online monitoring, and belongs to the technical field of cable terminal discharge monitoring. The ultrahigh frequency sensor for the cable partial discharge online monitoring solves the problem that an existing ultra wide band frequency-independent antenna can not have the characteristics of being low in transmission loss and ensuring a low frequency end at the same time. The ultrahigh frequency sensor for the cable partial discharge online monitoring comprises an antenna substrate, an equiangular helical antenna section, an Archimedes antenna section, a micro-strip line substrate, central conduction band micro-strip lines and earth plate micro-strip lines, wherein the equiangular helical antenna section and the Archimedes antenna section are spirally arranged on the antenna substrate from the center to the direction of an outer ring in sequence, two tail ends of the equiangular helical antenna section are correspondingly connected with two head ends of the Archimedes antenna section in a one-to-one mode, a protruding rectangular connecting column is arranged in the center of a head end side of the micro-strip line substrate, the central conduction band micro-strip lines cover the center of the obverse side of the micro-strip line substrate from the head end to the tail end, and the earth plate micro-strip lines cover the center of the reverse side of the micro-strip line substrate from the head end to the tail end. The ultrahigh frequency sensor for the cable partial discharge online monitoring is used for online monitoring of ultrahigh frequency signals of cable partial discharge.

The invention discloses a 5G millimeter wave passive orthogonal multi-beam planar array antenna, comprising an orthogonal excitation common-caliber slot antenna array arranged on an upper-layer feed radiation dielectric substrate, a group of transition structures from substrate integrated waveguide to substrate integrated coaxial cable, and two groups of folding type Cassegrain reflecting surfacewave beam feed networks which are distributed on the lower-layer feed dielectric substrate, the middle-layer feed dielectric substrate and the upper-layer feed dielectric substrate. The orthogonal excitation of the slot antenna array is realized through two substrate integration technologies of substrate integrated waveguide and substrate integrated coaxial cable, so that the common-caliber radiation is realized, and the structure is compact. According to the 5G millimeter wave passive orthogonal multi-beam planar array antenna in the invention, wave beams with different directions can be formed in two planes orthogonal to the space, wave beam scanning in the two planes is independently controlled by two groups of wave beam feed networks, the feed port meets better standing wave characteristics and good isolation degree, which can be realized through a multi-layer PCB process; and integration is easy due to the plane structure.

The invention provides a reconfigurable mono-pulse antenna. The reconfigurable mono-pulse antenna comprises fourantenna units arranged along longitudinal and transversal directions in a two-dimensional array manner, four switches in one-to-one correspondence with the antenna units, and a one-to-four equal-amplitude and equal-phase-position power distributor; each antenna unit comprises two feed ports; the feed ports at the two ends of each antenna unit are connected with the switches respectively through finite ground coplanar waveguide transmission lines; among the ports at the two ends of the antenna units, only one port is in the working state though the switch control; and four branches of the one-to-four equal-amplitude and equal-phase-position power distributor are connected with the switches respectively, and can feed one port of the two ports of the four antenna units separately through the switch control. The input ports of the antenna units can be changed by changing the states of the switches so as to change the phase positions of the antenna units to form three different antenna patterns: sum beams, azimuth difference beams and pitch difference beams so as to realize mono-pulse positioning.

The invention discloses a miniature orthogonal broadband electric bridge. The miniature orthogonal broadband electric bridge comprises a two-sided copper-coated dielectric plate and two single-sided copper-coated dielectric plates, wherein microstrip circuits with same structure are respectively etched on a front surface and a back surface of the two-sided copper-coated dielectric plate, each microstrip circuit comprises two N-order Lambda-fourth impedance matching transmission lines which are symmetrically arranged, N is equal to 2, 3 until 10, ends of the two Lambda-fourth impedance matchingtransmission lines are connected via a 50-ohm impedance line, an open-circuit branch is arranged at a connection position of the Lambda-fourth impedance matching transmission lines, the two single-sided copper-coated dielectric plates are respectively laminated onto the front surface and the back surface of the two-sided copper-coated dielectric plated etched with the microstrip circuits to forma deviation strip line-structure directional coupler, four ports of the two microstrip circuits are respectively an input port, a direct-through port, a coupling port and an isolation port, the inputport and the direct-through port are arranged in the same microstrip circuit, the coupling port and the isolation port are arranged in the same microstrip circuit, and the direct-through port and thecoupling port are arranged at the same side.

The invention discloses a transmission type ultra-broad band digital phase shifter. The transmission type ultra-broad band digital phase shifter comprises a winding inductance directional coupler, a phase reference path, an input selecting switch, an output selecting switch, an input matching unit and an output matching unit; the input matching unit is connected with the input selecting switch; the input selecting switch is connected with the winding inductance directional coupler and the phase reference path, and then is connected with the output selecting switch; the output selecting switch is connected with the output matching unit. The transmission type ultra-broad band digital phase shifter disclosed by the invention is compact in structure, small in area and low in cost, has a good stationary wave characteristic, little phase shift fluctuation, low insertion loss and parasitic amplitude modulation in an ultra-broad band frequency range, and can be widely applied to a broad band phased array system.

The invention discloses a micro-wave low-band ultra-micro matching PIN diode electronically controlled attenuator, which is applied to various microwave systems such as radars, electronic countermeasure, communication and so on, and comprises a transmission line and a bias line led out from the transmission line, wherein a PIN diode is codirectionally connected at N nodes, which have an interval of one fourth wavelength and have the quantity of more than or equal to 2, with the transmission line respectively and then is earthed to ensure that the N PIN diodes are parallelly connected to the transmission line, the PIN diodes at both sides are serially connected with a 50ohm resistor respectively, and circuits are produced on a ceramic substrate. The circuit design achieves good standing wave property and flatter attenuation characteristic and can better improve the matching of input ports; the designed circuits of the electronically controlled attenuator with a micro-wave matching form are produced on the ceramic substrate; the circuits have good consistency, and the micro-wave low-band ultra-micro matching PIN diode electronically controlled attenuator has the advantages of high integration level, small volume, simple structure and so on.

The invention discloses an ultra-wideband digital phase shifter. The phase shifter comprises a coupler and first and second impedance networks. The coupler is formed by spiral inductive coupling units through cascading. Each spiral inductive coupling unit comprises a first spiral inductor and a second spiral inductor which are mutually coupled. Multistage cascading of all the spiral inductive coupling units is realized by series connection all the first spiral inductors and series connection all the second spiral inductors. Coupling distance or microstrip line width of all the spiral inductive coupling units of the coupler gradually reduces from the external part to the internal part. The impedance networks are realized by adopting LC circuits and switch elements, and the state of the impedance networks is switched by the switches so that phase shifting is generated, and thus the structure is reasonable and realization is easy. The phase shifter is compact in structure, small in area occupation and great in wideband characteristics so that the phase shifter has great advantage and application space in an integrated chip application.

Provided is a broadband millimeter wave antenna. The antenna comprises an upper rectangular metal block, a lower rectangular metal block, and an intermediate dielectric substrate, one sides of the upper rectangular metal block and the lower rectangular metal block are respectively provided with a metal arm in an extended manner, the two metal arms are in mirror symmetry with respect to the dielectric substrate, the distances between two opposite surfaces of the metal arms are equal, the distances between two surfaces, which are face to face, of the metal arms are gradually increased along the length direction, a V-shaped radiation opening is formed, the end of the radiation opening forms a horn-shaped mouth portion, one end, with large diameter, of the mouth portion, is arranged towards the outside of the radiation opening, the upper surface and the lower surface of the dielectric substrate are metal surfaces, the dielectric substrate is provided with a switching circuit and a substrate integrated waveguide along the length direction, the switching circuit is arranged from a microstrip line to the substrate integrated waveguide, an output end of the substrate integrated waveguide is provided with a dielectric plate in an extended manner, the width of the dielectric plate is gradually reduced along the length direction, and the dielectric plate stretches into the radiation opening. The antenna is advantaged by wide bandwidth, low cost, small size, simple and compact structure, and easy integration and array organization.

The invention discloses a broadband low-profile antenna with a reconfigurable directional diagram. The broadband low-profile antenna comprises four antenna units which are distributed in a two-dimensional array in vertical and horizontal directions, four switches in one-to-one correspondence to the antenna units, and a one-into-four equal-amplitude equal-phase power distributor, wherein each antenna unit is provided with two feed ports; the feed ports of each antenna unit are connected with the switches through a corresponding microstrip transmission line (7); four branches of the one-into-four equal-amplitude equal-phase power distributor are connected with the switches respectively; and the switches are used for controlling the equal-amplitude equal-phase power distributor to be fed to one of the two ports of each antenna unit separately for realizing that only one of the two ports of each antenna unit is in the working state. The broadband low-profile antenna has the advantages of low profile, broad band, simple structure, easy integration, as well as consistency, easy realization, low cost and the like.

A suspended strip line ultra-wideband zero-point-adjustable band-pass filter disclosed by the invention is small in area, high in integration level and excellent in standing wave performance. According to the technical scheme, at least two resonators and a double-layer metallization coupling via hole which are arranged between double rows of metallization coupling via holes are distributed on the front face and the back face of a dielectric substrate, and each resonator is jointly composed of a main resonator located on one side and a resonator loading capacitor located on the other side; the resonator loading capacitors of all the resonators are connected with the metal ground at the two sides of the dielectric substrate; and transmission lines at the two ends achieve connection of the upper layer and the lower layer through a metalized through hole, and the self-resonant frequency of each resonator can be adjusted by adjusting the size of the resonator loading capacitor on the back face of the dielectric substrate of the resonator. The size of the capacitance loading part is increased, so that the self-resonant frequency of the resonators shifts towards the low-end direction of the frequency, the capacitance loading size of the back surface of the resonators is reduced, the self-resonant frequency of the resonators shifts towards the high-end direction of the frequency.

The invention relates to a satellite-borne sparse phased-array multi-beam antenna with a reflector, and belongs to the technical field of antennas. The satellite-borne sparse phased-array multi-beam antenna comprises the offset parabolic reflector, a feed source array and a master control circuit. The feed amplitude and phase of the feed source array are controlled by the master control circuit, and electromagnetic waves radiated by the feed source array are converged via the offset parabolic reflector and then are radiated to space. The quantity of required feed source units of the antenna is low, beams can be subjected to phase control, and the satellite-borne sparse phased-array multi-beam antenna can be widely applied to satellite-borne communication, detection and positioning systems.

The invention provides a microwave low waveband ultra-micro automatic gain control heterodyne receiving module. A circuit is formed in the mode that radio frequency signal inputs a balanced amplifier, a matching type electrically controlled attenuator, a microstrip bandpass filter, a balanced amplifier and a singly-balanced mixer which are orderly connected, and the single-balanced mixer outputs intermediate frequency signal. The module has the advantages of small volume, good circuit consistency, compact structure of the whole circuit and high integration level, and the module is only one-tenth of the prior product in size, thereby facilitating the micromation of the whole receiver; due to the adoption of the matching type circuits such as the balanced circuit, the circuit has stable performance; due to the adoption of the matching type electrically controlled attenuator, the circuit has good standing wave property; and because the attenuation of the electrically controlled attenuator is controlled by an intermediate frequency output level of the mixer, the automatic gain control of the heterodyne receiver is realized.

The invention discloses a frequency polarization reconfigurable patch antenna. The antenna includes a dielectric substrate, the upper surface of the dielectric substrate is provided with a metal patch, The lower surface of the dielectric substrate is provided with a ground plane, and the antenna further comprises three groups of ground via holes arranged in the dielectric substrate, wherein the ground via holes connect the metal patch and the ground plane, and the antenna further comprises two pairs of controllable perturbation parts arranged on the metal patch, wherein the three groups of ground via holes and the two pairs of controllable perturbation parts are connected with switches respectively. The antenna can work at different frequencies by changing the states of three groups of ground via holes. The antenna has three different polarization characteristics: linear polarization, left-handed circular polarization and right-handed circular polarization, and satisfies better polarization characteristics, better standing wave characteristics, small gain fluctuation, low profile, small volume, simple implementation and easy integration.

The invention discloses a polarized reconfigurable antenna. The polarized reconfigurable antenna comprises a dielectric substrate (1), an upper metal layer (21), a lower metal layer (22), a pair of controllable grounding through holes (5) with symmetrical structures, and more than two metal through holes (41) in array configuration to form a cavity body (4); the upper metal layer (21) is provided with an antenna radiation structure while the lower metal layer (22) is provided with an antenna feed structure; the grounding through holes (5) are connected with a switch separately; and the switch is used for controlling the grounding states of the grounding through holes (5) to realize different current disturbances. By changing the switch state, namely, changing the states of the pair of controllable grounding through holes, current disturbances are changed to form three kinds of different polarized waves, including linear polarization wave, left-hand circular polarization wave and right-hand circular polarization wave, thereby realizing the polarized reconfigurable antenna.

The invention provides a small-sized low-profile ultra wide band dual polarization antenna applied to the technical fields of communication, such as high-resolution radar detection, electronic countermeasures and ultra wide band wireless communication and the like. The overall antenna is combined by two similar Vivaldi-type antenna units in an orthorhombic manner so as to realize dual polarization; the Vivaldi-type antenna units are folded and curved through a meandering technology, so that the overall dimension and profile height are greatly reduced; by virtue of improved design of the feed microstrip line, high standing wave characteristic is achieved in the whole frequency band; and by virtue of optimization of the combined parameters of the antenna units, the two ports of the antenna has high isolation degree in the whole frequency band, so that the final antenna provided by the invention can realize a stable directional diagram and relatively low crossed polarization within quitewide frequency band, and is small in structure, low in profile and can better adapt various application fields.

The invention discloses an ultra-wideband adjustable phase shift unit loaded with a fan-shaped line reflection load and a phase shifter. The ultra-wideband adjustable phase shift unit comprises an input node, an output node and a quadrature coupler. An input node for receiving a to-be-phase-shifted signal is connected with the input end of the quadrature coupler. An output node for outputting a phase shift signal is connected with an isolation end of the quadrature coupler. The straight-through end and the coupling end of the quadrature coupler are respectively connected with a single-port variable reflective load unit. According to the invention, a reflective phase-shifting circuit architecture of the quadrature coupler is adopted, so that good input and output standing wave characteristics can be realized in an octave range, a relatively large phase-shifting range and relatively low additional amplitude change are further realized in an ultra-wideband range, and the problem of circuit consistency caused by process fluctuation in production is greatly reduced.

The invention provides a novel high-frequency broadband power amplifier comprising a frequency bandwidth expansion circuit, a broadband matching circuit and a power amplifier circuit, wherein the frequency bandwidth expansion circuit comprises a first power supply, a second power supply and an input end, a resistor, a first inductor and a first capacitor are sequentially connected in series between the first power supply and the input end, a first transistor and a second transistor are connected between two ends of the first inductor in parallel, a second inductor is connected between the drain electrode of the first transistor and the drain electrode of the second transistor, a third inductor is connected between the drain electrode of the second transistor and the second power supply, the broadband matching circuit comprises a microstrip line, and the drain electrode of the first transistor is connected with the microstrip line through a second capacitor. According to the novel high-frequency broadband power amplifier provided by the invention, two transistors are connected in parallel to expand the frequency bandwidth, thereby simplifying the circuit design, and ensuring a simple circuit design form, a small size, high efficiency and a low cost on the premise of satisfying high frequency, broad frequency band and high power output.

A microwave attenuator based on a novel topological structure comprises a plurality of periodical absorption structures, thin-film resistors and matched microstrip lines. Each periodical absorption structure comprises a low-impedance microstrip line and a resistor, grounding through punching is not needed, even absorption of high-frequency microwave signal energy is achieved, attenuation values of microwave signals of various frequencies in a working bandwidth are the same, reflection signals of any frequencies in the bandwidth can be reduced to an extremely-low level, and good matching is achieved. Compared with a traditional thin-film resistance attenuator, application frequency is substantially improved, in-band standing waves are improved, in-band flatness is good, punching is not needed, and the technology can be realized more easily.

The invention discloses a Ka-waveband double-reflection circularly-polarized one-dimensional 360 DEG covering antenna which adopts a double-reflection rotational symmetry structure and consists of a rotational parabolic reflector, a rotational table reflector, a circular polarizer, hard support foam and a flange. The rotational table reflector and the circular polarizer are processed integrally and arranged near a focus of the rotational parabolic reflector for feeding. An incident wave enters the circular polarizer through rectangular waveguide to form a circularly polarized wave, emitted to the rotational parabolic reflector and reflected by the rotational parabolic reflector and the rotational table reflector to realize 360DEG wave beam covering in a horizontal plane and minus 10 DEG to 30 DEG in a pitching plane. The one-dimensional 360 DEG covering antenna has the advantages of good electrical properties such as good non-circularity, great bandwidth, small echo and high gain, is compact in structure, low in cost, easy to process and applicable to vehicle-mounted communication systems.

The invention relates to a lightning-protection reflection type high-strength dual-waveband directional antenna. The lightning-protection reflection type high-strength dual-waveband directional antenna comprises a metallic reflection cavity, wherein microstrip plates are arranged in the metallic reflection cavity; a multiplexer is arranged on the microstrip plates; a coaxial cable is connected onto a main circuit of the multiplexer; a first radiation oscillator and a second radiation oscillator are respectively connected onto a first branch and a second branch of the multiplexer; a solid antenna housing covers on the first radiation oscillator and the second radiation oscillator; the solid antenna housing is provided with a lightning-protection reflection oscillator; the lightning-protection reflection oscillator is located at the same side of the first radiation oscillator and the second radiation oscillator; the first radiation oscillator and the second radiation oscillator adopt hollow sail-shaped unipolar metal oscillators; the hollow sail-shaped unipolar metal oscillators consist of first metallic straight strips, second metallic straight strips and arc-shaped metallic strips; the first metallic straight strips, the second metallic straight strips and the arc-shaped metallic strips are connected with one another in an end-to-end manner; angles formed by the first metallic straight strips, the second metallic straight strips and the arc-shaped metallic strips are acute angles; and metal blocks are arranged or directly welded on the hollow sail-shaped unipolar metal oscillators so as to form an inner-and-outer embattlement type structure.

A guiding high-strength dual-waveband directional antenna comprises a metal reflection cavity. A micro-strip plate is arranged in the metal reflection cavity, a multiplexer is arranged on the micro-strip plate, a coaxial cable is connected to a main path of the multiplexer, a first radiation oscillator and a second radiation oscillator are connected to a first branch and a second branch of the multiplexer respectively and covered by a solid antenna cover, and the first radiation oscillator and the second radiation oscillator are hollow sail-shaped monopole metal oscillators. Each hollow sail-shaped monopole metal oscillator comprises a first metal straight strip, a second metal straight strip and an arc metal strip, which are in end-to-end connection and form three acute angles, metal blocks are arranged on or directly welded to the hollow sail-shaped monopole metal oscillators to form inner and outer battlement structures.

The invention discloses a directional diagram and polarization reconstructable antenna which comprises four antenna units and four switches that are in one-to-one correspondence with the antenna units. Each antenna unit has two pairs of controllable perturbation parts. The two pairs of controllable perturbation parts are respectively connected with the switch which corresponds with the antenna unit. The switch is used for controlling the state of the perturbation part, thereby changing disturbance to the current. Each antenna unit comprises three feeding ports. The feeding ports of each antenna unit are connected with the switch which corresponds with the antenna unit with the feeding ports by feeding probes through transmission wires. The transmission wire is divided into two parts by a first equal-phase equal-amplitude power divider. Each part is divided into two parts by a second equal-phase equal-amplitude power divider. The finally divided four parts are connected with four switches. The directional diagram and polarization reconstructable antenna can realize the directional diagrams in different directions and furthermore can realize left-hand circular polarization and right-hand polarization.

The invention discloses a small-sized antenna for medium and short wave band ships. It consists of four components: a dielectric layer, a wire layer, a coaxial feeder, and a grounding plate; the wire layer is a planar structure, engraved on the upper surface of the dielectric layer, and consists of a number of curved wire segments connected end to end. Based on two six-order Hilbert fractal structures, the ends of the wires are connected by a short wire; the antenna is installed vertically on the upper surface of the ground plate, and a hole is opened at the geometric center of the ground plate, and the coaxial feeder is connected to the antenna through the hole of the ground plate. Experimental data show that the antenna prototype can work in the medium and short bands of 2-8MHz, and has the characteristics of small size, wide frequency band, low profile, omnidirectional, and suitable for ships. The invention can not only be used in the marine radio navigation system, but can also be extended to other related systems.

The invention discloses a 1w 28DB attenuating plate for high heat-conductivity aluminum oxide ceramic substrate; the attenuating plate comprises a ceramic substrate with a high thermal conductivity factor, wherein the ceramic substrate is made of aluminum oxide ceramic; the ceramic substrate is printed with two symmetrical pads, two leads are respectively drawn out from the two pads; a membrane-shaped resistor is printed between the leads and connected with the leads so as to form an attenuating circuit, wherein the attenuating value of the attenuating circuit is determined based on the fine resistance adjustment of the membrane-shaped resistor. Each performance index is sufficiently considered on design of the attenuating plate so as to make the attenuating plate non-inductive at high efficiency, so that the situation that the initial attenuating plate is applied to the low frequency only is broken, the application requirement of the current 3G (third-generation) network is met, and the series product line of the 1w fixed membrane-shaped resistor type attenuating plate is extended.

The invention discloses a miniaturization and high-stability radio-frequency signal output module which comprises a medium-power amplifying module, a single-pole single-throw switch, a coupler, a low-pass filter and an isolator. Input of the medium-power amplifying module is connected with a signal input end. Output of the medium-power amplifying module is connected with input of the coupler through the single-pole single-throw switch. One path of output of the coupler is connected with input of the isolator through the low-pass filter. Output of the isolator is connected with a signal output end. Other two paths of output of the coupler are coupling output and detection output respectively. The miniaturization and high-stability radio-frequency signal output module has ideal impedance matching, system stability is enhanced, meanwhile, non-linear distortion is weakened, an amplifier port is good in standing wave performance, the using stability of an amplifier is improved, the single-pole single-throw switch is used, so that output module loss is lowered, the isolation degree is improved, switch response time is shortened, and meanwhile the output module has the advantages of being simple in circuit structure, low in cost, good in signal output effect and the like.

The embodiment of the invention discloses a broadband adjustable attenuator circuit and method based on a GaAs technology. The broadband adjustable attenuator circuit comprises a 0dB attenuation unit, a 0.5 dB attenuation unit, a 1dB attenuation unit and a 2dB attenuation unit. The 0dB attenuation unit is used for direct connection of input signal power and outputting signals equal to the input power. The 0.5 dB attenuation unit is used for attenuating 0.5 dB power of an input signal and outputting a signal attenuated by the 0.5 dB power; the 1dB attenuation unit is used for attenuating the 1dB power of an input signal and outputting a signal attenuated with the 1dB power; the 2dB attenuation unit is used for attenuating the 2dB power of an input signal and outputting a signal with the attenuated 2dB power; and the 0dB attenuation unit, the 0.5 dB attenuation unit, the 1dB attenuation unit and the 2dB attenuation unit are configured to be connected in a gold wire bonding mode so as to achieve one of eight attenuation states.