42results about How to "Realize wideband" patented technology

The invention discloses a broadband flat plate array antenna, broadband can be achieved, and array antenna gain can be improved. According to the broadband flat plate array antenna, a coupling groove is used for stimulating two micro-strip subarrays, at the time, the impedance of a single micro-strip wire is high, a radiation paster can easily carry out high-impedance matching, accordingly the bandwidth of the micro-strip subarrays is widened, broadband is achieved, the relative bandwidth (Sll < -10 dB) of the feeding mode can reach 16%, 1 dB gain bandwidth can reach 14.6%, and common structure bandwidth is only about 6%. In addition, an H-shaped base chip is used for integrating a waveguide feeding network, the micro-strip subarrays are connected in parallel for feeding, along with increasing of array units, the bandwidth is hardly changed, broadband features can be kept in a large array, and array antenna gain can be improved gradually. In addition, the feeding network is placed below the micro-strip subarrays, extra circuit area cannot be increased, and array antenna miniaturization is promoted. The broadband flat plate array antenna is suitable for promotion and application in the technical field of microwave and millimeter wave antennas.

The invention relates to a patch antenna, which comprises a dielectric substrate (1) and a microstrip patch (2), wherein four radiating grooves (3, 4, 5 and 6) are respectively arranged on a surface of the microstrip patch (2) along diagonal positions of the dielectric substrate (1), and are distributed in a cross shape; four feeding points (7, 8, 9 and 10) are arranged on the microstrip patch (2); two feeding points are respectively arranged on a horizontal geometric center line and a longitudinal geometric center line; and the four feeding points (7, 8, 9 and 10) are symmetrical to a geometric center of the microstrip patch (2), and are provided with feeder lines for feeding. The patch antenna has wider impedance bandwidth and axial ratio bandwidth, and higher gain; the miniaturization of a structural dimension can be realized; and the stability performance of a phase center is better. According to the patch antenna, not only are the impedance bandwidth and the axial ratio bandwidth of the patch antenna greatly improved, but also favorable circular polarization performance and miniaturization effect are achieved, and the patch antenna is particularly suitable for an accurate measurement type navigation terminal.

The invention provides a double resonance double-excitation longitudinal vibration transducer, comprising a radiation head (1), a front crystal stack (2), intermediate mass (3), a back crystal stack (6), a tail load (7), a first insulation spacer, a second insulation spacer, a third insulation spacer, a forth insulation spacer, a nut (8) and a prestressed screw (12). By adjusting the series / parallel condition between each piezoelectric ceramic element in the front crystal stack (2) and the back crystal stack (6) and adjusting the connection mode of positive and negative electrodes of the front crystal stack (2) with the positive and the negative electrodes of the back crystal stack (6), a broadband emission transducer or a narrow-band high sensitivity emission transducer can be obtained respectively. The double resonance double-excitation longitudinal vibration transducer provided by the invention is characterized by low mechanical quality factor Qm, wide frequency band, less fluctuation and high sensitivity, and can be used as a broadband or narrow-band sound source in various detecting sonars, unmanned underwater vehicles or underwater communicators.

The invention provides a magnetoelectric dipole antenna of a metasurface dielectric plate, which comprises a first dielectric layer, a second dielectric layer and a third dielectric layer, and is characterized in that a pair of short circuit columns and a vertical transmission line pass through the three dielectric layers, and the middle of the dielectric layers is a feed structure; and the vertical transmission line and the feed structure are used for feeding the magnetoelectric dipole antenna. According to the invention, the frequency band is expanded through designing a slot of an appropriate shape on an electric dipole, the low frequency of the impedance bandwidth of the antenna ranges from 3.12GHz to 5.92GHz, the high frequency ranges from 7.14GHz to 8.45GHz. The gain fluctuates from6.0dBi to 8.9dBi in the low frequency, and the gain fluctuates from 6.7dBi to 9.6dBi in the high frequency. The magnetoelectric dipole antenna can realize an approximately symmetric directed radiationpattern on two radiation surfaces E, H in the whole working frequency of the antenna. In the invention, the traditional magnetoelectric dipole antenna technologies are combined with metasurface technologies, so that functions such as wide frequency band, high gain and directed radiation of the antenna are realized.

The invention discloses a circular polarization short backfire antenna with spiral feed source with higher broadband characteristic and smaller using volume from wireless communication antenna field, which comprises a master reflector (1), a sub-reflector (2), a feed source (3), as well as an assisting support (2); the feed source (3) comprises a helical antenna (31) and a feed point allocation device (32); the helical antenna (31) is coiled on the assisting support (2), one end is fixed with the assisting support (2), and the other end is connected with a signal output cable (5) through the feed point allocation device (32). Through adopting the helical antenna as the feed source of backfire antenna, the invention realizes the broadband and circular polarization of the antenna, meanwhile, the invention uses the helical wire to support and replace the special shaft, and to be connected with main parts of the antenna, thereby simplifying the antenna structure, reducing complexity of antenna processing technology, so as to benefit the mass production of the antenna.

The invention provides a lateral output device for a wave gyro traveling wave tube, and belongs to the millimeter wave source technical field of the high-power millimeter wave technology, particularly a lateral output device for a wave gyro traveling wave tube, wherein a Gaussian beam can be directly outputted. In the prior art, a wave gyro traveling wave tube must be externally connected with a waveguide mode converter. In order to overcome the above defect in the prior art, the invention provides a novel output device for a wave gyro traveling wave tube. The output device comprises a transition waveguide section, a 90-degree waveguide turning section and a circular waveguide radiator. According to the technical scheme of the invention, a high-purity Gaussian beam can be laterally and directly outputted within a broadband range without any functional device, such as an external mode converter, an elbow or the like. Therefore, the complexity of a high-power millimeter wave application system is greatly reduced.

The invention discloses a multi-frequency array antenna, comprising a metal reflection plate, a low-frequency radiation array arranged on the metal reflection plate and made up of at least one low-frequency radiation unit and a high-frequency radiation array made up of at least one high-frequency radiation unit, wherein one axis parallel with the lengthwise direction of the metal reflection plate is defined; at lease one low-frequency radiation array is arranged along the axis direction; the low-frequency radiation unit comprises at least one radiation arm; and the high-frequency radiation unit is arranged above the radiation arm of the low-frequency radiation unit and / or between two low-frequency radiation units. The multi-frequency array antenna disclosed by the invention has the advantages of effective reduction of transverse dimension, excellent electrical performance, convenient installation and high reliability.

The invention relates to a digital television transmitting antenna based on an E-shaped patch. The digital television transmitting antenna comprises a formation plate, the E-shaped patch, a rectangular parasitic patch, an input connector and a retaining screw, wherein the rectangular parasitic patch, the E-shaped patch and the formation plate are orderly arranged in parallel from top to bottom to form a main structure of a stacked antenna; the E-shaped patch is provided with two symmetric rectangular gaps, and the length of a middle wing is smaller than that of two sides; an outer conductor of the input connector is fixed on the formation plate, and an inner conductor of the input connector penetrates through the formation plate and is connected to the E-shaped patch to feed; the rectangular parasitic patch at the upper layer is coupled by the E-shaped patch to feed. The digital television transmitting antenna based on the E-shaped patch provided by the invention satisfies the use requirement of a terrestrial television broadcasting transmitting system by adopting a multi-resonator technology to improve the impedance bandwidth and power handling of antennas; the invention has the characteristics of being wide in working band, high in gain, small in input standing-wave ratio, high in power handling, simple in processing, convenient in debugging and the like, and is applicable to a terrestrial television transmitting antenna system of a decimeter wave band.

A mobile phone antenna has: a first conductive radiation element that is formed in a sheet metal conductor and resonates at a predetermined resonance frequency; a second conductive radiation element that is formed in the sheet metal conductor and resonates at the predetermined resonance frequency; and a ground that is connected through a conductive ground connector with the second conductive radiation element. The ground is placed such that the ground is not opposed to the first and second conductive radiation elements.

The invention relates to the field of wireless technologies, and provides an array antenna, an antenna subarray and a base station. The array antenna comprises a bottom-layer plastic dielectric substrate, a plastic bulge arranged on the bottom-layer plastic dielectric substrate, a top-layer plastic dielectric substrate stacked on the plastic bulge, and a radiation unit, wherein the radiation unitis electroplated on the surface, which is away from the bottom-layer plastic dielectric substrate, of the top-layer plastic dielectric substrate. The array antenna further comprises a feed network electroplated and printed on the bottom-layer plastic dielectric substrate and the plastic bulge, wherein the feed network comprises a one-to-two power divider and a differential coupling feed circuit electrically connected with the one-to-two power divider. In addition, the invention also provides a base station applying the array antenna. Compared with the prior art, the requirements of wide band,low cost, miniaturization and light weight of the 5G base station antenna are met by adopting a differential coupling feed technology and a plastic electroplating processing technology.

The invention belongs to the technical field of a wireless communication system and discloses a circularly polarized PIFA antenna with a high-stability phase center and a GPS positioning system. The antenna comprises a feed structure and a radiation structure, wherein the radiation structure comprises eight rectangular metal sheets and a metal column which are printed on an upper layer of a circular FR4 dielectric plate, the feed structure comprises a three-stage Wilkinson power division phase shifter and four coaxial lines which are printed on a lower layer of a rectangular FR4 dielectric plate, ports of the power divider excite the PIFA antenna to radiate energy through feed probes, and circular polarization performance and the relatively stable phase center of the antenna are realized by designing the symmetrical antenna structure, the symmetrical four-point uniform feed structure and four symmetrical feed points. The end-fire antenna has characteristics of radiation circular polarization, high stable phase center, low profile, light weight, easiness in processing and the like, and has a wide application prospect in the field of novel circular polarization PIFA antennas.

The invention discloses a single channel dual base station ultra-short wave signal spatial positioning method and belongs to the technical field of ultra-short wave radio position finding. According to the method, a dual base station positioning system is constituted of a single channel Doppler antenna array and a reference antenna; phase positions are extracted directly from simulation signals to act as data base; two-dimensional information of azimuth angle and pitch angle is converted to one-dimensional information by use of space included angles, match searching is performed to data base and measured phase positions by use of a similarity measurement function to obtain azimuth angle of a target source. By use of the method, aerial ultra-short wave radio-frequency signals can be accurately positioned, the real-time performance of a direction-finding system is increased, system cost and complexity are reduced, and labor and economic investment are saved; the method is of great practical importance.

The invention discloses a broadband flat plate array antenna, broadband can be achieved, and array antenna gain can be improved. According to the broadband flat plate array antenna, a coupling groove is used for stimulating two micro-strip subarrays, at the time, the impedance of a single micro-strip wire is high, a radiation paster can easily carry out high-impedance matching, accordingly the bandwidth of the micro-strip subarrays is widened, broadband is achieved, the relative bandwidth (Sll < -10 dB) of the feeding mode can reach 16%, 1 dB gain bandwidth can reach 14.6%, and common structure bandwidth is only about 6%. In addition, an H-shaped base chip is used for integrating a waveguide feeding network, the micro-strip subarrays are connected in parallel for feeding, along with increasing of array units, the bandwidth is hardly changed, broadband features can be kept in a large array, and array antenna gain can be improved gradually. In addition, the feeding network is placed below the micro-strip subarrays, extra circuit area cannot be increased, and array antenna miniaturization is promoted. The broadband flat plate array antenna is suitable for promotion and application in the technical field of microwave and millimeter wave antennas.

The invention discloses an antenna includes a first antenna unit and a second antenna unit. Each antenna unit of the first antenna unit and the second antenna unit includes a first antenna component and a second antenna component, the first antenna component has an annular structure is provided with a slot slit, the annular structure is provided with an outer periphery and an inner periphery limited by the line of rabbet joint, the second antenna component is coupled with the first antenna component, and the first antenna unit and the second antenna unit are arranged in a symmetrical mode. The antenna further includes a feed component which is respectively coupled with the first antenna component of the first antenna unit and the first antenna component of the second antenna unit, and the feed component is used for feeding the first antenna component of the first antenna unit and the first antenna component of the second antenna unit. According to the antenna, the facts of controllable wave beam, wide broadband and high gain can be achieved, and the concentration use of effective energy is ensured, the radiation efficiency of the antenna is greatly improved, and thus the requirements of the modern communication technology to the antenna can be met.

The invention belongs to the technical field of mobile communication, and discloses a high-efficiency broadband omnidirectional whip antenna. The whip antenna comprises a dielectric substrate which islocated at the position of an interlayer of the antenna; an upper radiation oscillator which is disposed at the upper part of the front surface of the dielectric substrate in a manner of printing etching; a broadband adjustment branch node which is disposed at the center of the upper radiation oscillator in a manner of printing etching; a lower radiation oscillator which is disposed at the lowerpart of the front surface of the dielectric substrate in a manner of printing etching; feed transmission lines which are disposed on the front and back surfaces of the dielectric substrate in a mannerof printing etching, and are located at the center of the lower radiation oscillator, wherein the lower ends of the feed transmission lines extend to a feed connector, and the upper ends of the feedtransmission lines extend to the broadband adjustment branch node; the feed connector which is located at the lowermost part of the antenna, and is connected with the feed transmission lines. The upper radiation oscillator, the broadband adjustment branch node, the lower radiation oscillator and the feed transmission lines are disposed on the front and back surfaces of the dielectric substrate inan etched manner through the printing circuit technology. The whip antenna achieves the wide band and high efficiency, is simple in structure, is convenient to process, and is suitable for ultrashort-wave omnidirectional communication application.

The invention belongs to the technical field of wireless communication and discloses a broadband circular polarization log periodic antenna which is provided with a main oscillator, an auxiliary oscillator and a group of parallel double lines, wherein the main oscillator and the auxiliary oscillator are arranged in an orthogonal mode; the main oscillator comprises a plurality of symmetric oscillators that are fed by the parallel double lines in a cross manner to form a log periodic antenna; the auxiliary oscillator comprises a plurality of symmetric oscillators that are connected with the fivesymmetric oscillators of the main oscillator to form five-layers of cross-shaped oscillator antennas; and the value range of the length ratio K of the main oscillator and the auxiliary oscillator inthe cross-shaped oscillator antenna is 1.1-1.5, and the lengths of the auxiliary oscillator in every two adjacent layers of the cross-shaped oscillator antennas are the length of the main oscillator multiplied by K and 1 / K, according to the self-phase-shifting principle of the cross-shaped oscillator antennas, and under the different conditions that the length of the auxiliary oscillator of the first layer of cross-shaped oscillator antenna is the length of the main oscillator multiplied by the ratio K or 1 / K, the circular polarization characteristics of the antenna in two different rotationaldirections can be respectively realized. Compared with a traditional broadband circular polarization log periodic antenna, the broadband circular polarization log periodic antenna is simpler in structure and has the advantages of wide frequency band and circular polarization.

The invention discloses a broadband sleeve antenna for a portable terminal device, in combination with actual portable terminal device application, a broadband monopole sleeve antenna design based ona terminal structure body is provided under a condition that antenna structure size is limited, and an antenna band covers 225-678 MHz. In the design, conventional bandwidth broadening methods of adding lossy devices, such as a magnet ring, are discarded, and the design is realized through a sleeve structure and a helix loading mode, meanwhile, a spiral spring is designed to be roundabout so as torealize reduction of size, and a plurality of spiral radiators are connected in parallel under different thread pitches so as to realize broad band, thus, functions of a plurality of antennae can berealized by one antenna.

The invention provides a steel rail shock absorber which comprises a plate spring unit and a tuned mass unit, restrained points are arranged on the plate spring unit, at least one restrained point is restrained on a steel rail, the tuned mass unit is fixed to the plate spring unit, and the distance between the tuned mass unit and the restrained points forms a stress arm, and the tuned mass unit and the plate spring unit form a mass spring resonance subsystem. When the resonance frequency of a steel rail damper system is adjusted to be close to the resonance frequency of the steel rail, strong vibration of a subsystem is caused, counter-acting force with the reverse force phase is generated on a steel rail main system, and part of vibration energy transmitted by the steel rail main system is counteracted, or part of vibration energy is converted into other forms of energy such as heat energy and sound energy to be dissipated.

A structure of a double-frequency broadband microstrip antenna comprises a printed board, a base, a first electric connector and a second electric connector. A first radiation element and a second radiation element are arranged on the printed board; the diameters of the first radiation element and the second radiation element are different; the printed board is arranged on the base, and the printed board and the base form two independent air cavities, namely a first air cavity and a second air cavity; the first radiation element is located at the first air cavity, and the second radiation element is located at the second air cavity; a probe of the first electric connector is connected with the first radiation element and is used for transmitting signals to the first radiation element; and a probe of the second electric connector is connected with the second radiation element and is used for transmitting signals to the second radiation element. The two radiation elements with different sizes are arranged on the printed board, the two independent air cavity structures are formed between the printed board and the base, the two radiation elements with different sizes are used for realizing different frequencies, and the two air cavities can realize the broadband of different microstrip antennas.

This invention relates to antennas for portable radiotelephones. The antenna provided by the present invention can widen the frequency band without raising the position of the antenna element, and can suppress the shift of the resonance frequency even with a structure in which the position of the ground part is changed. Mounted on a portable wireless device such as a portable phone, the panel antenna (10) connected to the printed circuit board contained therein and the ground portion (32, 23) of the LCD forms a horizontal U shape as a whole, and has a main body The first radiating element (11) extending in a straight line and in a strip shape from one end thereof, the combination adjustment part (12) adjacent to the first radiating element and arranged in parallel on the same plane, and the end portion and combination of the first radiating element The second radiating element (13) connected to the adjustment part. In addition, a port part (43) for power supply is provided near the other end of the first radiating element, and a ground connection part (42) for connecting the circuit board ground (32) is provided at the end of the second radiating element.

The invention belongs to the technical field of microwave and millimeter wave antennas, and discloses a broadband metal flat panel array antenna, a radar, and a wireless communication system. The feed network layer and the upper radiation unit layer; there is a transition structure between the feed network layer and the feed network layer, and a step is introduced on the ridge of the ridge gap waveguide in the feed network layer for transition; the feed network layer and the radiation unit There is a transition structure between the layers, and a metal ridge is introduced at the port of the feed network layer to guide the energy transition. The invention uses an all-metal structure, and the simple three-layer metal plate is fixed by screws, which is convenient for assembly and use. The present invention adopts the double-layer gap waveguide as the feeding network, so that the overall structure of the antenna is compact and the profile is low, and wide bandwidth is realized. The invention uses a simple radiation unit, removes the air cavity, reduces the antenna section and realizes a wide frequency band in the millimeter wave frequency band.

The invention discloses a top-loaded sleeve antenna applied to UAVs, relates to the technical field of antennas, and solves the problems that the existing antennas often cannot achieve low profiles, are complex in design and have insufficient frequency bands. It includes a floor on which a sleeve monopole antenna is connected; the top of the sleeve monopole antenna is connected with a top loading, and the top loading includes an upper disk and a disk cone with the big end facing up from top to bottom. A number of short-circuit columns are connected between the bottom plate and the upper disc to increase the resonance point of the antenna at a low frequency; an annular groove is opened on the upper surface of the upper disc to increase the bandwidth of the antenna and move the entire working frequency band to the low frequency. The effect of low profile, miniaturization and wide frequency band of the antenna is achieved.

The invention discloses an ultra-wideband ceiling antenna. The ultra-wideband ceiling antenna is characterized by comprising a loading disc, a radiating body and a base plate, wherein a grounding piece and a supporting column are arranged between the radiating body and the base plate, and a feeder cable penetrates through the base plate and is connected with the radiating body for feeding. The ultra-wideband ceiling antenna almost covers whole UHF frequency bands and part of UWB frequency bands by adopting disc loading, slotting and grounding piece increasing technologies and the like. In addition, a sheet object is adopted as the radiating body, and the ultra-wideband ceiling antenna is simple in structure, low in structure and convenient to produce.

The invention provides a double-resonance double-excitation longitudinal vibration transducer, comprising a radiation head (1), a front crystal stack (2), an intermediate mass (3), a rear crystal stack (6), a tail load (7), a second One, the second, the third, the fourth insulating spacers, nuts (8) and prestressed screw rods (12); The series-parallel relationship, and the electrical connection between the positive and negative electrodes of the front crystal stack (2) and the positive and negative electrodes of the rear crystal stack (6), respectively can obtain a transducer for broadband emission or a transducer for narrowband high-sensitivity emission device; the dual-resonance dual-excitation longitudinal vibration transducer provided by the present invention has the characteristics of low mechanical quality factor Qm, wide frequency band, small fluctuation and high sensitivity, and can be used as a sensor for various detection sonars, underwater unmanned vehicles and underwater vehicles. Broadband or narrowband sound sources for communication equipment.

The invention discloses a drone operator positioning system and method based on an aerial radio monitoring platform, and belongs to the technical field of radio direction finding and positioning. The invention includes an airborne direction finding system and a ground control system. The airborne direction finding system measures the incoming wave direction where the maximum energy of the target signal appears, and determines the position; the ground control system remotely controls the airborne direction finding system and the air monitoring platform, and obtains the positioning in real time. result. The airborne direction finding system collects and compresses the target signal, extracts the frequency hopping signal, and matches the azimuth angle, GPS position and time information with the frequency hopping signal in real time; the ground control system controls the air monitoring platform to change the air attitude, so that the airborne measurement Determine to the system the incoming wave direction where the maximum energy of the target signal appears. The present invention is applicable to areas where multi-point ground monitoring equipment is unconditionally erected in complex urban environments, saves manpower and funds, and realizes wide-band, all-round, and high-precision spatial positioning of frequency-hopping signals of remote controllers.

The invention relates to a digital television transmitting antenna based on an E-shaped patch. The digital television transmitting antenna comprises a formation plate, the E-shaped patch, a rectangular parasitic patch, an input connector and a retaining screw, wherein the rectangular parasitic patch, the E-shaped patch and the formation plate are orderly arranged in parallel from top to bottom to form a main structure of a stacked antenna; the E-shaped patch is provided with two symmetric rectangular gaps, and the length of a middle wing is smaller than that of two sides; an outer conductor of the input connector is fixed on the formation plate, and an inner conductor of the input connector penetrates through the formation plate and is connected to the E-shaped patch to feed; the rectangular parasitic patch at the upper layer is coupled by the E-shaped patch to feed. The digital television transmitting antenna based on the E-shaped patch provided by the invention satisfies the use requirement of a terrestrial television broadcasting transmitting system by adopting a multi-resonator technology to improve the impedance bandwidth and power handling of antennas; the invention has the characteristics of being wide in working band, high in gain, small in input standing-wave ratio, high in power handling, simple in processing, convenient in debugging and the like, and is applicable to a terrestrial television transmitting antenna system of a decimeter wave band.

The invention discloses a multi-frequency array antenna, which includes a metal reflector and a low-frequency radiation array composed of at least one low-frequency radiation unit and a high-frequency radiation array composed of at least one high-frequency radiation unit arranged on the metal reflector, wherein , defining an axis parallel to the longitudinal direction of the metal reflector, at least one of the low-frequency radiation arrays is arranged along the axis; the low-frequency radiation unit includes at least one radiation arm, and the high-frequency radiation unit is arranged at Above the radiation arm of the low frequency radiation unit and / or between two low frequency radiation units. The multi-band array antenna of the invention effectively reduces the lateral size, has superior electrical performance, is convenient to install, and has high reliability.

The invention discloses a tri-band mobile phone antenna. The tri-band mobile phone antenna includes a double-sided substrate, a cuboid which is located at the perigon of the upper surface of the double-sided substrate and is integrally connected with the double-sided substrate, a first strip which winds the cuboid along the upper surface and side surfaces of the cuboid, a second strip which winds the cuboid in a bent manner along the side surfaces of the cuboid, a feeding part, a grounding end and a grounding groove; the grounding groove is in the shape of a rectangle; and an inverted L-shaped strip matched with the grounding groove is arranged in the grounding groove. The tri-band mobile phone antenna can realize tri-band communication, and has the advantages of small size, simple structure and low cost.

The invention discloses a miniaturized mobile terminal antenna supporting dual-mode coexistence. The antenna comprises a dielectric substrate, a first feed network, a second feed network, a first antenna radiation unit and a second antenna radiation unit, and is characterized in that the first antenna radiation unit is positioned on the front side of the second antenna radiation unit; the first radiation unit and the second radiation unit are respectively composed of a plurality of metal conductors, and the metal conductors are sequentially connected and distributed on different surfaces of the dielectric substrate, so that the overall size of the antenna is reduced, and the space utilization rate of the dielectric substrate and the space utilization rate of the mobile terminal are improved; a stepped impedance structure is formed in the first antenna radiation unit and the second antenna radiation unit to achieve broadband and multiband characteristics of the antenna, a fixed decoupling network is used for reducing coupling between the first antenna radiation unit and the second antenna radiation unit, and most of metal conductors are in the same plane, so batch production can be realized by adopting a common PCB processing technology; and the antenna has the advantages of low profile and wide coverage frequency band.

The invention discloses a circular polarization short backfire antenna with spiral feed source with higher broadband characteristic and smaller using volume from wireless communication antenna field, which comprises a master reflector (1), a sub-reflector (2), a feed source (3), as well as an assisting support (2); the feed source (3) comprises a helical antenna (31) and a feed point allocation device (32); the helical antenna (31) is coiled on the assisting support (2), one end is fixed with the assisting support (2), and the other end is connected with a signal output cable (5) through the feed point allocation device (32). Through adopting the helical antenna as the feed source of backfire antenna, the invention realizes the broadband and circular polarization of the antenna, meanwhile, the invention uses the helical wire to support and replace the special shaft, and to be connected with main parts of the antenna, thereby simplifying the antenna structure, reducing complexity of antenna processing technology, so as to benefit the mass production of the antenna.