35results about How to "With ultra-wideband characteristics" patented technology

The invention belongs to the technical field of the material, and specifically relates to an ultra wide band energy selection surface. The ultra wide band energy selection surface comprises a medium substrate, a first metal structure printed on an upper surface of the medium substrate, and a second metal structure printed on a lower surface of the medium substrate; the first metal structure is twogroups of same rail-mounted combination shapes; each rail-mounted combination shape comprises two mutually parallel cross metal strips and a plurality of mutually parallel longitudinal metal trips for connecting two cross metal strips; the longitudinal metal strips are arranged at intervals, and a plurality of diodes is loaded on each longitudinal metal strip; the second metal structure is a gridcomposed of the metal strips. The ultra wide band energy selection surface disclosed by the invention has the advantages that the multilayer metal periodic structure and the PIN diodes are used for realizing the frequency selection feature on incident electromagnetic wave and the energy selection feature for sending the electromagnetic energy, and the ultra wide band energy selection surface is anovel and self-adaptive front-door electromagnetic signal suppression technology.

The invention provides a multiple stop band ultra wideband antenna which is realized based on a two-segment type ladder impedance resonator, has working characteristics of ultra wideband and can restrain the interference of multi-frequency signals; the antenna comprises a medium substrate(1) and two layers of metallic coatings which are coated on the upper and the lower surfaces of the medium substrate(1) respectively, wherein the metallic coating(2) of the lower surface is of the metallic ground of a feeder part(5), and the metallic coating(3) of the upper surface comprises an antenna radiating unit(4), a feeder(5) and a multi-band stop filter(7), wherein the antenna radiating unit(4) which is disc-shaped; no metallic ground (2) is distributed behind the disc; the radiating unit adoptingthe structure has ultra wideband characteristics; the feeder part(5) adopts a microstrip line form, and the multi-band stop filter(7) and a ladder-formed impedance conversion line(6) are connected between the feeder part(5) and the antenna radiating unit(4), wherein the ladder-formed impedance conversion line(6) carries out the impedance matching connection.

The multi-stop band ultra-wideband antenna based on miniaturized dual-mode resonators and zero-order resonators includes a dielectric substrate (1), and a lower surface metal coating (2) covered on the upper and lower surfaces of the dielectric substrate (1), and the upper surface Metal coating (3); the metal coating (2) on the lower surface is the ground of the feeder part, which adopts an isosceles trapezoidal design to meet the impedance matching requirements between the feeder (5) and the antenna radiation unit (4); the metal coating on the upper surface The coating (3) includes the following parts: antenna radiation unit (4), feeder (5), first dual-mode ladder impedance resonator (8), second dual-mode ladder impedance resonator (9), third dual-mode Ladder impedance resonator (10), zero-order split ring resonator (11), the antenna has a simple structure, small size, meets the requirements of planar circuit integration, and has the advantages of low cost and convenient mass production, so it is suitable for various Anti-interference ultra-wideband applications.

A small ultra-wideband omnidirectional antenna comprises one radiation floor, one insulating medium, one feed body shaped in a conical shell, one radiating body shaped in the conical shell, at lease one short circuit body and one feed joint. The insulating medium is installed on the radiation floor. The feed body is installed on the insulating medium. The radiating body extends upwards at the upper end of the feed body to be formed, and a taper angle of the radiating body is larger than that of the feed body. Two ends of each short circuit body are respectively connected with the radiating body and the radiation floor. The feed joint is provided with an inner metal core connected with the feed body. The small ultra-wideband omnidirectional antenna is smaller in size and has an ultra-wideband feature.

A dual-band and dual-polarized antenna (10) comprises a metal reflector (1), a first radiator array and a second radiator array coaxially aligned along an axis of the reflector. The first radiator array has a plurality of first dual-polarized radiators (3) for a lower frequency range aligned in front of the reflector. The second radiator array has a plurality of second dual-polarized radiators (2) for a higher frequency range aligned in front of the reflector. Each first radiator has a second radiator encased therein, and two adjacent first radiators have two second dual-polarized radiators inserted therebetween. The antenna of the present invention optimizes the performance of the first radiators for the lower frequency range and the second radiators for the higher frequency. Moreover, the antenna is satisfactorily meeting the antenna requirements of wide frequency range, small size, high gain, wide broadband, simple design, low cost and consistence etc.

The invention provides a multi-frequency-point broadband signal generator which mainly comprises a digital circuit module, and a local oscillation source module and a channel module which are connected with digital circuit module, wherein the local oscillation source module is also connected with the communication module. The invention has the beneficial effects that: the multi-frequency-point broadband signal generator is implemented by phase locking and frequency mixing, and can work normally in a bandwidth of 1GHz; furthermore, stray deterioration possibly occurred in a circuit is well suppressed; high stray performance and high phase noise performance are realized; and a good technical foundation is laid for synchronously outputting a plurality of frequency points.

The invention discloses a broadband planar reflective array antenna with a wider phase compensation range. The technical scheme adopted is as follows: the planar reflective array antenna includes a feed source and a conductive planar reflective array surface; the feed source is used for emitting or receiving electromagnetic waves; the conductive planar reflective array surface is used for scattering the electromagnetic waves emitted by the feed source into planar waves or receiving the planar waves and converging the planar waves onto the feed source; and a number of reflection units are distributed in an array on the conductive planar reflective array surface, and each reflection unit includes a phase hole and four branches distributed on the phase hole. The planar reflective array antenna is characterized in that twigs extend in the same direction from one side of the branches, the twigs extend near the edges of the phase holes, and slots for are formed between the twigs and the edges of the phase holes to adjust and control phase compensation and working frequency.

The invention discloses an ultra-broadband quasi-open slow-wave structure, which comprises two identical metal plates and supporting metal walls or media on both sides, wherein, at the center of the width direction of the lower side of the upper metal plate and the upper side of the lower metal plate Load a strip-shaped metal ridge with a width of Rw and a height of Rh that periodically undulates along the longitudinal direction, wherein the period length of the ups and downs is p; in this way, a strip-shaped electron injection channel is formed in the space between the strip-shaped metal ridges, and its height hb is the difference between the metal plate distance b and twice the ridge height Rh. It has a natural strip-shaped electron beam channel, no additional processing is required, the processing difficulty is low, and the coupling impedance is large, which is very conducive to the start-up of the return wave oscillator; the low-end cut-off frequency is very low, with ultra-wideband characteristics, and high-frequency transmission Reflect small features.