39results about How to "Reduce the size of the antenna" patented technology

The invention provides a controllable three-trapped-wave ultra-broadband antenna which comprises a dielectric substrate, a waveguide ground plate, a micro-strip radiation paster and an annular parasitic element. The micro-strip radiation paster is fixed on the front face of the dielectric substrate. An arc-shaped groove H is formed in the micro-strip radiation paster. The waveguide ground plate is fixed on the back face of the dielectric substrate. Two L-shaped grooves are formed in the waveguide ground plate. The annular parasitic element is located on the back face of the dielectric substrate. The micro-strip radiation paster is located in the middle of the dielectric substrate. The trapped wave antenna with the arc-shaped groove H is designed, so that on the basis that the trapped wave function is achieved, the trapped wave center frequency is adjusted by adjusting and combining the parameters of the groove. Meanwhile, the three-trapped-wave function of the antenna is achieved through the annular parasitic element on the back face of the substrate, and two / three trapped waves of the antenna are switched through two switches.

The structure of antenna includes a grounding component, a first send receive component, and a second send receive component. The first send receive component includes a first L shaped component, and a first radiation sect. The first L shaped component is connected to the grounding component. The first radiation sect is connected to the first L shaped component. The first send receive component is in use for sending and receiving the first radio signal. The second send receive component includes a second L shaped component, and a second radiation sect. The second L shaped component is connected to the grounding component. The second radiation sect is connected to the second L shaped component. The second send receive component is in use for sending and receiving the second radio signal. Position of the second radiation sect is between the first radiation sect and the grounding component approximately.

The invention discloses a multi-port frequency-division tunable antenna which comprises a reflection plate and a feed network module, wherein the feed network module comprises a phase shifter module, a frequency divider array and a power divider, the frequency divider array is connected with the phase shifter module, the power divider is connected with the phase shifter module, the back side of the reflection plate is connected with the frequency divider array, the front side of the reflection plate is provided with a wideband dipole array through a non-conductive mode, and the wideband dipole array comprises dipole units. In the antenna, through the design of the phase shifter module and the power divider matched with the frequency divider array, a signal of a wideband radiator or the antenna is divided into two paths or even multiple paths of independent sub signals so as to form two pairs or even multiple pairs of antennas with different frequency bands; on the condition of no increase of the antenna volume, at least one pair of antenna is equivalently added; and on the premise of ensuring performance, approximate half of the antenna volume is reduced, and space resources of a base station are greatly saved.

The invention relates to an antenna oscillator assembly, an antenna and a piece of communication equipment. The oscillator assembly comprises a cross sector intersecting oscillator, a support feed assembly, a ground plate and a polarization isolation power dividing device. The cross sector intersecting oscillator is fixed on the top of the support feed assembly. The bottom of the support feed assembly is fixed on the center of the ground plate. The polarization isolation power dividing device is arranged on the central position of the ground plate back side. The cross sector intersecting oscillator is connected with the polarization isolation power dividing device through a coaxial supply line inside the support feed assembly. The antenna oscillator assembly which is no longer dependent on microwave dielectric plates solves the multi-frequency wideband circular polarization feed problem. Meanwhile, by forming the cross sector intersecting oscillator and adjusting the height of the cross sector intersecting oscillator away from the ground plate, the antenna oscillator assembly achieves more flexible directional diagram control and optimized circular polarization characteristics. By means of the polarization isolation power dividing device, the antenna oscillator assembly can make de-rotation multipath signals suppressed. The antenna oscillator assembly which has the characteristics of wideband, low consumption and high efficiency can make the volume, the weight and the cost of the antenna obviously reduced.

The present invention discloses a quadri-filar helix antenna structure, which comprises a cylindrical body made of a dielectric material with a relative dielectric constant εr greater than 4, and four radiating metal plates disposed on a distal end surface of the cylindrical body and extended along the radial direction of the center of the cylindrical body to its periphery and then along the radial direction in a spiral course on the circumferential surface thereof to its periphery on the other end respectively, wherein the ends of every two adjacent radiating metal plates are coupled with each other to constitute two sets of antenna structures, a penetrating hole is disposed at the central position of the cylindrical body and is precisely embedded into a coaxial cable, and a shield cable disposed at the periphery on one end of the coaxial cable is coupled to an end of another set of antenna structure. Therefore, the antenna not only reduces the overall volume, but also greatly lowers its production costs.

The invention provides a diversity antenna device and a terminal. The device comprises a processor, a transceiver and an antenna body and also comprises a switch module, wherein the processor is connected to the transceiver, the antenna body is connected to the transceiver by the switch module and a radio-frequency transmission line, the antenna body comprises N antenna oscillators, N is an integer larger than 2, the switch module comprises two input ends and N output ends, the two input ends are connected to the transceiver, the N output ends are respectively connected to the N antenna oscillators, the switch module is used for selectively making two of the N output ends in communication states, and the other output ends outside the two output ends are in disconnection states. With the device provided by the scheme, more diversity parameters can be obtained by a few antenna oscillators, the limitation on the volume of the terminal can be reduced by reducing the antenna volume on the premise that the diversity parameter can be met, and the device can be favorably and greatly applied to a product.

The invention discloses an airborne double-frequency antenna applied to an L / C frequency band, which employs a double-side microstrip antenna structure. The airborne double-frequency antenna comprisestwo groups of radiation microstrip oscillators with different frequency bands and two corresponding groups of coupling feeding networks with different frequency bands, the radiation microstrip oscillators and the coupling feeding networks are printed on the same PCB, the two radiation microstrip oscillators both employ the same broadband microstrip symmetrical oscillator structures and are printed on the front surface of the PCB, and the two feeding networks each comprise an input port and two coupling feeding ports and are printed on the backside of the PCB. According to the airborne double-frequency antenna, the communication frequency band width and the communication reliability of the antenna are improved in performance, the gain consistency of a horizontal directional diagram is improved, the structure of the antenna is simple, and stability and reliability are achieved.

The invention discloses a small three-trap ultra-broadband antenna, which comprises a dielectric substrate, a microstrip feeder, a rectangular radiation patch and a rectangular ground plate, wherein the microstrip feeder and the rectangular radiation patch are arranged on the dielectric substrate; the microstrip feeder is in a rectangular form; a symmetrical structure is adopted by the rectangular radiation patch to achieve a trap characteristic; two inverted T-shaped slot structures are designed on the rectangular radiation patch part to achieve a 5.2 / 5.8GHz trapped wave; a 3.5GHz trapped wave is achieved by a comb-shaped slot; a C-shaped slot and two rectangular slots are formed and two square patches at the middle part of the comb-shaped slot are reserved to respectively separate two 5.2GHz and 5.8GHz specific trapped waves; and an extremely large impedance bandwidth within a range of 2.2-14.6GHz is achieved by combining the radiation patch structure with the relatively narrow rectangular ground plate. The small three-trap ultra-broadband antenna has the characteristics of being small in volume, simple in structure, good in trap characteristic and large in impedance bandwidth.

A scanned radio frequency (RF) antenna having a small volume is described.

The invention relates to the technical field of the communication antenna, in particular to an ultra-wideband multi-system narrow-beam array antenna comprising a reflective floor, low-frequency oscillators, high-frequency oscillators, first metal baffles, a second metal baffle, and a dielectric plate. The low-frequency oscillators and the high-frequency oscillators are fixedly installed on the reflective floor; the first metal baffles are installed between the high-frequency oscillators below a low-frequency array and are fixedly connected to the reflective floor; the second metal baffle is fixedly installed in the middle of the reflective floor; and the dielectric plate is installed above a high-frequency array. According to the invention, the antenna has the mutually independent antennaarray systems; on the basis of the integrated embedded design, the usage rate of the space of the base station is increased substantially, the antenna number of the base station is reduced, and the mounting difficulty is reduced; and with the narrow beam design, the narrow arterial traffic scene is covered effectively, so that the high-speed train penetration coverage rate during the high-speed operation is guaranteed, the operation cost and the resource wasting are reduced, energy conservation and emission reduction effects are realized, and the visual pollution is reduced.

The invention provides a direction graph reconfigurable microstrip antenna with rectanglar channel and includes the metal motherboard 12, medium substrate 13 and metal patch 14. The metal patch 14 is made by means of cutting 12 rectanglar channel (21-32) in the Y axial symmetry on the rectangle metal patch. The metal patch 14 is dressed on the upper surface of the medium substrate 13. The energy is fed back the antenna through the coaxial feeder11. We can realize the connection or disconnection between the conduction bands by changing the work state of the switches (connection or disconnection), then control the stream status of the current between the conduction bands and thus change the current distribution of the whole antenna structure. Adopting the metal patch 14 realizes the planarization of the antenna and makes the aims of small antenna volume; light weight and easy conformation with the carriers (such as planes) come true. The antenna has simple structure and high use value and can be realizes conveniently.

An embodiment of the invention discloses a bidirectional antenna. The bidirectional antenna comprises a substrate, two mutually-parallel dipoles, balance microstrip lines and a balance-unbalance converter. Each dipole comprises two arms which are respectively printed on the top face and the bottom face of the substrate, and the distance between the dipoles is lambda / 2; the balance microstrip lines are printed on the top face and the bottom face of the substrate and used for feeding the two dipoles; the balance-unbalance converter is connected with the balance microstrip lines and used for performing impedance matching on the two dipoles. The invention further discloses a wireless access point and a train control system comprising the bidirectional antenna. A bidirectional high-gain antenna function is realized through the antenna of the structure with the two dipoles. Compared with a bidirectional antenna formed by connecting two directional antennas via a power divider in a traditional method, the bidirectional antenna has the advantages that components such as the power divider can be omitted, the size of the antenna is reduced, and manufacturing, mounting and maintenance cost is lowered.

A dual-band antenna including a ground element, a short-circuit element, a feed element and a radiator is provided. The radiator includes a first connection segment, a first radiation element, a second radiation element, a third radiation element and a fourth radiation element. The dual-band antenna covers a first frequency band a second frequency band through the symmetrical first radiation element and second radiation element and the symmetrical third radiation element and fourth radiation element, so as to effectively decrease an antenna volume, and satisfy the requirement of a signal coverage range of a communication device.

The invention provides a microwave optical signal wireless laser transmission device and method, and belongs to the technical field of microwave optical signal transmission. The problem that in the prior art, microwave optical signal long-distance wireless laser transmission cannot be conducted between two platforms moving relatively is solved. The device comprises a first tracking unit, a secondtracking unit, an alignment unit, a signal transmitting optical fiber and a signal receiving optical fiber, wherein the first tracking unit is connected with the second tracking unit, the second tracking unit is connected with the alignment unit, the signal transmitting optical fiber is connected with the second tracking unit, the alignment unit is connected with the signal receiving optical fiber, and an optical antenna is arranged in the first tracking unit. The device and method are mainly used for long-distance wireless laser transmission of microwave optical signals.

The invention discloses a low-interference unit of a base station antenna. Thelow-interference unit comprises a base, a microstrip support PCB is arranged on the base, a vibrator arm extending horizontally is arranged at the upper end of the microstrip support PCB, and a choke sleeve is arranged on the vibrator arm. By adopting the choke sleeve design, the emission of high-frequency signals can bereduced, the problem of large mutual interference of high and low frequencies is solved, and the size of the antenna is correspondingly reduced without influencing the working effect.

The invention discloses a wide-beam quadrifilar helix antenna with an equal-flux radiation characteristic. The wide-beam quadrifilar helix antenna specifically comprises an antenna dielectric substrate, a gradual change type helix antenna assembly, a floor, a feed network dielectric substrate and an orthogonal feed network, wherein the antenna dielectric substrate comprises an outer-layer hollow cylindrical thin dielectric plate and an inner solid cylindrical dielectric; the gradual change type helix antenna assembly comprises a first helix arm, a second helical arm, a third helix arm and a fourth helix arm. According to the antenna, the three sections of stepped impedance type spiral arms of which the screw pitches are sequentially decreased are adopted, and the open-circuit branch knot is loaded at the tail end, so that a relatively wide half-power wave beam and a 3dB axial ratio wave beam are obtained while the size of the antenna is reduced; and a quadrifilar helix structure is adopted, so that a relatively stable circular polarization characteristic is obtained.

A double frequency antenna in zigzag shape, which can provide antenna receiving and transmitting functions for radio communication device, includes base plate, conductor in zigzag shape and a feeder line, among which the base plate is made of dielectric material or magnetic material and including a first surface, the conductor in zigzag shape is attached on the first surface with a periodic reciprocating folding mode and including a middle jointing point between two ends of the conductor in zigzag shape, the feeder line electrically connected with the jointing point in the said middle joint is used for transmitting radio signal to the radio communication device or transmitting the radio signal created by radio communication device to the outside via the conductor in zigzag shape.

An antenna module includes a center base and several antennas disposed around the center base. The center base has several extension legs extending from the center base, and each antenna extends from an end of the corresponding extension leg opposite to the center base, so as to form the antenna module symmetrically arranged around the center base. The type of the antenna may be a single-frequency antenna and a dual-frequency antenna. The antenna module is an integral structure formed by directly bending a single metal plate, thus greatly reducing the volume and the manufacturing cost of the antenna module. Moreover, with the design of the center base and a symmetrical antenna group, the antenna module is capable of receiving and transmitting signals with two or more frequency bands, thus greatly increasing the application range of the antenna module.

The invention discloses a multichannel small broadband receiver, which comprises a signal processor, a small broadband antenna group and a broadband radio frequency receiving front end group, whereinthe broadband radio frequency receiving front end group is positioned between the small broadband antenna group and the signal processor; the small broadband antennas in the small broadband antenna group are connected with the broadband radio frequency receiving front ends in the broadband radio frequency receiving front end group in a one-to-one correspondence manner; the small broadband antennagroup is used for receiving broadband microwave signals in a space; the broadband radio frequency receiving front end group amplifies, filters and down-mixes the broadband microwave signal into an intermediate frequency signal and sends the intermediate frequency signal to the signal processor; and the signal processor is used for carrying out analog-to-digital conversion on the intermediate frequency signal, converting the intermediate frequency signal into a digital signal and then carrying out digital signal processing. Under the condition that the function is not changed, the size of a conventional system can be greatly reduced.

The invention discloses a flaky polarized antenna, comprising a reflecting plate and an outer cover. Particularly, the reflecting plate is made of a PCB (Printed Circuit Board); an upper vibrator and a lower vibrator made of microstrip lines and having plate structures are arranged on the reflecting plate, and the upper vibrator and the lower vibrator are respectively located on two sides of the reflecting plate and spaced from each other; the reflecting plate is further provided with a connecting through hole, and a connecting block made of metal is arranged in the connecting through hole; one end of the connecting block is directly connected with the upper vibrator, and the other end is connected with the lower vibrator by a connecting strip made of metal. The flaky polarized antenna has the advantages of simple structure, small size, wide band and the like.

The invention provides a radiation element and an antenna. The radiation element is formed by a square board through N-ORDER FRACTAL, wherein N is an integer and is greater than or equal to 3. First hollow grooves are separately formed in the middle parts of four edges of the square board towards the center of the square board. Second hollow grooves are separately formed in the middle parts of the four edges of each first order square towards the center of the first order square. Fractal of a structure formed after the second order fractal is continued to form the N-ORDER FRACTAL according to a second order fractal method. The radiation element provided by the invention has the advantage of small area at the same operating frequency.

The disclosure provides an antenna device including an antenna element, a feeding portion, a filtering circuit, and a sensing circuit. The antenna element transmits or receives a radiation signal, wherein the radiation signal includes at least one of a first component and a second component, and a frequency band of the first component is lower than a frequency band of the second component. The feeding portion is coupled to the antenna element. The filtering circuit is coupled to the feeding portion, receives the radiation signal via the feeding portion and filters the second component of the radiation signal to generate a sensing signal. The sensing circuit is coupled to the filtering circuit, receives the sensing signal and determines whether a human body approaches the antenna device based on the sensing signal.

The invention discloses a microstrip monopole antenna. The antenna comprises two layers of dielectric substrates, a main radiation oscillator attached to an interlayer between the two layers of dielectric substrates, guide patch layers attached to the front and rear surfaces of the dielectric substrates, and a metal grounding layer, antenna patch layers comprise a bottom guide patch, a middle guide patch and a top guide patch, and a gap is formed between every two adjacent patches; the arrangement positions of the guide patches on the back surface correspond to those of the guide patches on the front surface; and the main radiation oscillators are directly connected with the feed network. According to the microstrip monopole antenna, forward radiation is realized, the antenna wave beam isfunnel-shaped, the microstrip monopole antenna can be used as a missile-borne antenna, and the antenna bandwidth is wide enough.

The invention relates to a near-field communication antenna. The near-field communication antenna is used for performing near-field communication. The near-field communication antenna includes a grounding part, radiation parts, short-circuit parts and a feed-in part; the grounding part is located at a first plane of a substrate; a plane where the radiation parts is located is parallel to the first plane; the radiation parts include a first radiation part and a second radiation part; one ends of each of short-circuit parts are connected with the grounding part, and the other ends of the short-circuit parts are connected with the radiation parts; the short-circuit parts are used for adjusting the resonance frequency of the near-field communication antenna so that the size of the near-field communication antenna can be decreased; the feed-in part is connected with the radiation parts and is used for feeding in electromagnetic wave signals; and a gap is formed between the first radiation part and the second radiation part, so that the intensity of an electric field in the area of the first radiation part and the second radiation part can be enhanced. The intensity of the near-field electric field of the near-field communication antenna is high, and the size of the antenna is small, and the antenna is suitable for the design of thin and small products.