CN214313539U

CN214313539U - Dual-port dual-polarized broadband V/UHF composite antenna

Info

Publication number: CN214313539U
Application number: CN202022730126.8U
Authority: CN
Inventors: 陈鹏宇; 李晶晶; 候宇通; 王满仓; 杨向天
Original assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Current assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-09-28
Anticipated expiration: 2030-11-24

Abstract

The utility model discloses a dual-port dual polarization broadband V/UHF composite antenna relates to machine-carried V/UHF communication/reconnaissance/early warning technical field, and it includes dielectric substrate, antenna bottom plate, composite antenna prints in the front of dielectric substrate. The dual-port dual-polarization broadband V/UHF composite antenna has the advantages that the dual-port dual-polarization broadband V/UHF composite antenna can overcome the defects of large number of antennas, large occupied space and low isolation in a multi-antenna system by virtue of the vertically-polarized monopole antenna, the horizontally-polarized slot antenna, the matching circuit, the resistor, the capacitor, the inductor, the coaxial feed unit, the horizontally-polarized slot antenna, the two arms of the inverted A-shaped slot, the horizontally-polarized monopole antenna and the RLC matching circuit, so that the problems that the requirement of each function on a radiation pattern is greatly influenced by the fact that the height of the antenna is greatly increased by vertically stacking two radiators of the antenna to meet the requirement of each function on the antenna are solved, and the potential safety hazards such as antenna fracture exist are avoided.

Description

Dual-port dual-polarized broadband V/UHF composite antenna

Technical Field

The utility model relates to an airborne V/UHF communication/reconnaissance/early warning technical field specifically is a dual-port dual polarization broadband V/UHF composite antenna.

Background

The vertical polarization antenna with the common working frequency of the airborne V/UHF antenna in the prior art in the range of the V/UHF frequency band has single function, and for an airborne machine with reconnaissance and early warning functions, tens of even tens of V/UHF antennas are often required to be arranged, the working frequency and the radiation direction of each antenna are overlapped, the mutual shielding and interference are serious, and the isolation degree between the antennas is difficult to meet the requirements, which brings great difficulty to the layout of the whole airborne antenna, therefore, the requirement of compounding multiple antennas is more urgent, but for the antenna of the V/UHF frequency band, the volume of the antenna needs to be large for meeting the performance requirement due to the longer working wavelength, but as the airborne antenna, the antenna is required to have streamline shape, and the height must be as low as possible to reduce the influence on the aerodynamic appearance of the airborne machine, therefore, the volume limitation is the main difficulty of the design of the airborne antenna of the V/UHF frequency band, for a dual-port V/UHF composite antenna, the antenna of one port basically reaches the upper limit of volume limit, the antenna of the other port is added on the dual-port V/UHF composite antenna, the spatial arrangement is very difficult, the isolation between the ports is difficult to improve because the working frequencies of the dual ports are close to/overlapped, the V/UHF communication function requires that the working frequency of the antenna crosses VHF and UHF frequency bands, the antenna is vertically polarized, horizontally omnidirectional and vertically tilted +/-30 degrees so as to ensure the communication between a carrier and a ground station under various flight attitudes, the reconnaissance function requires that the antenna is horizontally polarized in the UHF frequency band, the horizontal plane is 45-135 degrees to 225-315 degrees and horizontally tilted +/-30 degrees so as to realize the direction-finding function of a target, generally, the design of the composite antenna of the type stacks two radiators of the antenna up and down to meet the requirements of various functions on radiation patterns, but the method tends to greatly increase the height of the antenna, the impact on the pneumatic appearance of the aircraft is great, and potential safety hazards such as antenna breakage exist, so that the problem is solved by providing the dual-port dual-polarized broadband V/UHF composite antenna.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a dual-port dual polarization broadband V UHF composite antenna has solved present composite antenna and has stacked two irradiators of antenna from top to bottom in order to satisfy each function and must greatly increase the problem that antenna height influences the pneumatic appearance of carrier and has potential safety hazards such as antenna fracture very greatly.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the technical proposal that: a dual-port dual-polarization broadband V/UHF composite antenna comprises a dielectric substrate, an antenna bottom plate and a composite antenna, wherein the composite antenna is printed on the front surface of the dielectric substrate and consists of a vertically polarized monopole antenna and a horizontally polarized slot antenna, the horizontally polarized slot antenna is etched in the middle of the vertically polarized monopole antenna, the vertically polarized monopole antenna consists of a rectangular patch, a microstrip feeder line and a matching circuit, an inverted-A-shaped slot etched on the rectangular patch and a coaxial feeder line unit form the horizontally polarized slot antenna, the center of the inverted-A-shaped slot is superposed with the center of the rectangular patch, the size of the inverted-A-shaped slot is adjusted according to the working frequency of the horizontally polarized slot antenna, the microstrip feeder line is positioned at the middle lower part of the rectangular patch, and the matching circuit consists of a resistor, a low-frequency resistor and a low-frequency resistor, The capacitor, the inductor and the grounding point are electrically connected and then connected between the rectangular patch and the grounding point, the rectangular patch is fixedly connected with a coaxial feed unit dielectric sheath in an attached mode, and a coaxial feed unit inner conductor and a coaxial feed unit outer conductor are arranged in the coaxial feed unit dielectric sheath.

Preferably, the resistor and the capacitor are connected in parallel and then connected in series with the inductor.

Preferably, the specifications of the resistance, the capacitance and the inductance are determined by the impedance of the antenna.

Preferably, the inner conductor of the coaxial feed unit is connected with the inner conductor welding point, and the outer conductor of the coaxial feed unit is connected with the outer conductor welding point.

(III) advantageous effects

The beneficial effects of the utility model reside in that:

the dual-port dual-polarized broadband V/UHF composite antenna ensures that the dual-port dual-polarized broadband V/UHF composite antenna can overcome the defects of large number of antennas, large occupied space and low isolation in a multi-antenna system through a vertically polarized monopole antenna, a horizontally polarized slot antenna, a matching circuit, a resistor, a capacitor and an inductor, a coaxial feed unit, a horizontally polarized slot antenna, two arms of an inverted A-shaped slot, a horizontally polarized monopole antenna and an RLC matching circuit, under the condition of not additionally increasing the height of the antenna, the requirements of wide frequency band, dual polarization and combination of the antenna required by V/UHF communication and reconnaissance/early warning functions are met, therefore, the problems that the height of the antenna is greatly influenced on the pneumatic appearance of the carrier and potential safety hazards such as antenna breakage and the like exist when two radiators of the antenna are vertically stacked to meet the requirements of various functions on a radiation directional diagram of the existing composite antenna are solved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the matching circuit structure of the present invention;

fig. 3 is a schematic diagram of the slot antenna structure of the present invention.

In the figure: the antenna comprises a dielectric substrate 1, an antenna base plate 2, a composite antenna 3, a monopole antenna with vertical polarization 4, a rectangular patch 41, a microstrip feeder 42, a slot antenna with horizontal polarization 5, an inverted-A-shaped slot 51, two arms of an inverted-A-shaped slot 52, an inner conductor welding point 53, an outer conductor welding point 54, a coaxial feed unit 6, an inner conductor of a coaxial feed unit 61, an outer conductor of a coaxial feed unit 62, a dielectric sheath of a coaxial feed unit 63, a matching circuit 7, a resistor 71, a capacitor 72, an inductor 73 and a grounding point 74.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the utility model provides a technical solution: a dual-port dual-polarization broadband V/UHF composite antenna comprises a dielectric substrate 1, an antenna base plate 2 and a composite antenna 3, wherein the composite antenna 3 is printed on the front surface of the dielectric substrate 1, the composite antenna 3 consists of a vertically polarized monopole antenna 4 and a horizontally polarized slot antenna 5, the horizontally polarized slot antenna 5 is etched in the middle of the vertically polarized monopole antenna, the vertically polarized monopole antenna 4 consists of a rectangular patch 41, a microstrip feeder 42 and a matching circuit 7, an inverted-A-shaped slot 51 etched on the rectangular patch 41 and a coaxial feeder unit 6 form the horizontally polarized slot antenna 5, the center of the inverted-A-shaped slot 51 is superposed with the center of the rectangular patch 41, the size of the inverted-A-shaped slot 51 is adjusted according to the working frequency of the horizontally polarized slot antenna 5, the microstrip feeder 42 is positioned at the middle lower part of the rectangular patch 41, the matching circuit 7 is composed of a resistor 71, a capacitor 72, an inductor 73 and a grounding point 74, the resistor 71, the capacitor 72 and the inductor 73 are electrically connected and then connected between the rectangular patch 41 and the grounding point 74, the rectangular patch 41 is fixedly connected with a coaxial feeding unit dielectric sheath 63 in a bonding mode, and a coaxial feeding unit inner conductor 61 and a coaxial feeding unit outer conductor 62 are arranged in the coaxial feeding unit dielectric sheath 63.

The resistor 71 is connected in parallel with the capacitor 72 and then connected in series with the inductor 73.

The specifications of the resistor 71, the capacitor 72 and the inductor 73 are determined by the impedance of the antenna.

The coaxial feed element inner conductor 61 is connected to the inner conductor pad 53 and the coaxial feed element outer conductor 62 is connected to the outer conductor pad 54.

The utility model discloses an operating procedure does:

the horizontal polarized slot antenna 5 is etched in the radiation area of the vertical polarized monopole antenna 4, because the current on the vertical polarized monopole antenna 4 is in the vertical direction, and the currents on the left side and the right side of the structure are equal in magnitude and same in phase, the etched horizontal polarized slot antenna 5 does not damage the working mode of the vertical polarized monopole antenna 4, only the current path on the upper side is lengthened, thereby affecting the impedance matching thereof, the impedance matching of the vertical polarized monopole antenna 4 can be adjusted through the matching circuit 7, the resistor 71, the capacitor 72 and the inductor 73, the horizontal polarized slot antenna 5 is fed through the coaxial feeding unit 6, the two arms 52 of the excited inverted A-shaped slot respectively form the constant amplitude current along the vertical direction of the two arms of the inverted A-shaped slot 51, the components of the two currents in the horizontal direction are equal in amplitude and opposite in the vertical direction, after being mutually superposed, only the current in the horizontal direction has the polarization mode of horizontal polarization, the polarization directions of the horizontal polarization and the vertical polarization monopole antenna 4 are completely orthogonal, so that the ultrahigh isolation between two ports can be obtained, the impedance matching of the horizontal polarization slot antenna 5 can be adjusted by the length, the width and the opening angle of two arms 52 of an inverted A-shaped slot, and because the vertical polarization monopole antenna 4 adopts the matching mode of an RLC matching circuit 7 and the horizontal polarization slot antenna 5 adopts the frequency-independent design mode, the bandwidths of the vertical polarization monopole antenna 4 and the horizontal polarization slot antenna 5 can realize the ultra-wideband characteristic of octave, thereby ensuring that the composite antenna 3 can overcome the defects of large number of antennas, large occupied space and low isolation in a multi-antenna system, and simultaneously, the requirements of wide frequency band, dual polarization and combination of the antenna required by V/UHF communication and reconnaissance/early warning functions are met.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a dual-port dual polarization broadband V/UHF composite antenna, includes dielectric substrate (1), antenna bottom plate (2), composite antenna (3), its characterized in that: the composite antenna (3) is printed on the front surface of the dielectric substrate (1), the composite antenna (3) is composed of a vertically polarized monopole antenna (4) and a horizontally polarized slot antenna (5), the horizontally polarized slot antenna (5) is etched in the middle of the vertically polarized monopole antenna, the vertically polarized monopole antenna (4) is composed of a rectangular patch (41), a microstrip feeder line (42) and a matching circuit (7), an inverted-A-shaped slot (51) etched on the rectangular patch (41) and a coaxial feeder line unit (6) form the horizontally polarized slot antenna (5), the center of the inverted-A-shaped slot (51) is overlapped with the center of the rectangular patch (41), the size of the inverted-A-shaped slot (51) is adjusted according to the working frequency of the horizontally polarized slot antenna (5), and the microstrip feeder line (42) is positioned at the middle lower part of the rectangular patch (41), the matching circuit (7) is composed of a resistor (71), a capacitor (72), an inductor (73) and a grounding point (74), the resistor (71), the capacitor (72) and the inductor (73) are electrically connected and then connected between the rectangular patch (41) and the grounding point (74), the rectangular patch (41) is fixedly connected with a coaxial feeding unit dielectric sheath (63) in an attaching mode, and a coaxial feeding unit inner conductor (61) and a coaxial feeding unit outer conductor (62) are arranged in the coaxial feeding unit dielectric sheath (63).

2. The dual-port dual-polarized broadband V/UHF composite antenna according to claim 1, wherein: the resistor (71) is connected with the capacitor (72) in parallel and then connected with the inductor (73) in series.

3. The dual-port dual-polarized broadband V/UHF composite antenna according to claim 2, wherein: the specifications of the resistor (71), the capacitor (72) and the inductor (73) are determined by the impedance of the antenna.

4. The dual-port dual-polarized broadband V/UHF composite antenna according to claim 1, wherein: the coaxial feed unit inner conductor (61) is connected to the inner conductor pad (53) and the coaxial feed unit outer conductor (62) is connected to the outer conductor pad (54).