CN114883804A - Ultra-wideband spot beam ring focal antenna - Google Patents
Ultra-wideband spot beam ring focal antenna Download PDFInfo
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- CN114883804A CN114883804A CN202210447753.1A CN202210447753A CN114883804A CN 114883804 A CN114883804 A CN 114883804A CN 202210447753 A CN202210447753 A CN 202210447753A CN 114883804 A CN114883804 A CN 114883804A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
- H01Q5/55—Feeding or matching arrangements for broad-band or multi-band operation for horn or waveguide antennas
Abstract
The invention discloses an ultra wide band spot beam ring focal antenna, which comprises: the feed source component comprises a main reflecting surface, an auxiliary reflecting surface, a feed source component and a coupler component; the bandwidth of the ultra-wideband is not less than twice the frequency range; the auxiliary reflecting surface is fixed on the main reflecting surface through more than three supporting rods; the feed source assembly and the coupler assembly are arranged at the inner bottom of the main reflecting surface, the feed source assembly is provided with two ports, the coupler assembly is provided with four ports, the two ports of the feed source assembly are correspondingly connected with the two ports of the coupler assembly, the other two ports of the coupler assembly serve as two input and output ports of the ring-focus antenna, one input and output port corresponds to left-hand circular polarization, and the other input and output port corresponds to right-hand circular polarization.
Description
Technical Field
The invention relates to the technical field of microwave antennas, in particular to an ultra-wideband spot beam ring focal antenna.
Background
The ring-focus antenna is also called as a parabolic focal axis offset axisymmetric double-mirror antenna, and occupies a unique position in the satellite-borne communication antenna, particularly in the medium and small satellite-borne communication antenna, and has the advantage that the primary shielding caused by a feed source is smaller than the secondary shielding caused by a secondary reflection. In addition, the feed source does not shield the geometric optical reflection of the secondary reflection, and the voltage standing wave ratio of the complete machine of the ring focal antenna basically depends on the voltage standing wave ratio of the feed source, so that the voltage standing wave ratio of the complete machine of the ring focal antenna is easy to design, and the polarization discrimination rate is high. The ring-focus antenna has the advantage of higher antenna efficiency because the radiation field of the feed source is uniformly distributed on the aperture of the antenna after being reflected by the secondary reflection, so that the antenna efficiency is higher. The main reflecting surface of the circular focus antenna is a parabola, the auxiliary reflecting surface is generally an ellipse, the phase center of the feed source is positioned on one focus of the ellipse, and the other focus is superposed with the focus of the main reflecting surface.
The form of the ring-focus antenna is various, for example, an "satellite-borne ring-focus antenna based on a novel support minor reaction" (application number: CN201710221471.9) applied by Shanghai aviation and space survey and control communications institute (inventor: Zliana et al) and an "elliptical beam zoom ring-focus antenna" (application number: CN02214415.3) applied by electronic fifty-fourth institute (inventor: Yankoch et al) of the department of information industry. The star-carrying ring focal antenna based on the novel supporting auxiliary reflection comprises a main reflection surface, an auxiliary reflection surface, a feed source assembly, a cylindrical medium cover, a circular table medium cover, an adjusting gasket and a center supporting cover, wherein the feed source assembly is installed on a center supporting barrel, the cylindrical medium cover is fixedly connected with the auxiliary reflection surface and then fixed with the circular table medium cover through screws, the cylindrical medium cover and the circular table medium cover are installed on the center supporting barrel together, the adjusting gasket is additionally arranged between the center supporting barrel and the circular table medium cover and between the center supporting barrel and the main reflection surface, and the center supporting barrel is finally fixed on the main reflection surface. The invention mainly aims at the design of a ring focal antenna supporting structure, and does not research an ultra wide band (hereinafter referred to as ultra wide band) ring focal antenna. The latter designs an elliptic beam zooming ring focus antenna, which is composed of a zooming main surface, a zooming auxiliary surface, a feed source, a tracking network component, a polarization adjusting component, a pitching mechanism, a seat frame, a supporting rod, a supporting lug and the like. The utility model discloses an adopt main face and the subplane of varifocal ring focus structure in order to produce efficient oval wave beam, but also do not study ultra wide band ring focus antenna.
In summary, the present research on the ring-focus antenna mostly focuses on beam forming, zoom design, lightweight structure, and novel materials, and there is only a research on the ultra-wideband (bandwidth not less than twice frequency range) ring-focus antenna.
Disclosure of Invention
In view of the above, the present invention provides an ultra wide band spot beam ring focal antenna, which can implement dual circular polarization spot beam coverage in an ultra wide band, each polarization corresponds to a separate feed port, and the dual circular polarization works simultaneously, and has a compact structure and high antenna efficiency.
The technical scheme of the invention is as follows: an ultra-wideband spot beam ring-focus antenna, comprising: the feed source component comprises a main reflecting surface, an auxiliary reflecting surface, a feed source component and a coupler component; the bandwidth of the ultra-wideband is not less than twice frequency range;
the auxiliary reflecting surface is fixed on the main reflecting surface through more than three supporting rods; the feed source assembly and the coupler assembly are arranged at the inner bottom of the main reflecting surface, the feed source assembly is provided with two ports, the coupler assembly is provided with four ports, the two ports of the feed source assembly are correspondingly connected with the two ports of the coupler assembly, the other two ports of the coupler assembly serve as two input and output ports of the ring-focus antenna, one input and output port corresponds to left-hand circular polarization, and the other input and output port corresponds to right-hand circular polarization.
Preferably, the focal ratio of the ring-focus antenna is 0.3-0.8.
Preferably, the coupler assembly employs a stripline coupler, comprising: the micro-strip plate, the plug assembly, the cavity and the cavity cover plate; the microstrip board is arranged in the cavity and covered by the cavity cover plate, and the four plug components are connected with four ports of two metal strip lines in the microstrip board.
Preferably, the microstrip plate is formed by laminating three layers of substrates, wherein the three layers of substrates are an upper substrate, a middle substrate and a lower substrate respectively; a metal ground I is reserved on the upper surface of the upper-layer substrate; a metal strip line I is etched on the upper surface of the middle substrate; a metal strip line II is etched on the upper surface of the lower substrate, and a metal ground II is reserved on the lower surface; the two metal strip lines are the same and are arranged in opposite directions, and the two metal strip lines are staggered along the length direction of the middle substrate.
Preferably, the coupler assembly is a microstrip power divider or a stripline power divider.
Preferably, the ratio of the diameters of the main reflecting surface and the auxiliary reflecting surface is 3: 1-5: 1.
Preferably, the phase center of the feed source component is located on one focus of an ellipse where a bus of the auxiliary reflecting surface is located, and the other focus of the ellipse is superposed with the focus of the main reflecting surface; wherein, two generatrices of the secondary reflecting surface share one focus of the ellipse.
Preferably, the feed source assembly adopts a horn antenna or a ridged horn antenna or a Vivaldi antenna or a dipole antenna.
Has the advantages that:
(1) according to the invention, the dual-circular polarization spot beam coverage is realized in an ultra-wide band by adopting a circular-focus antenna scheme formed by the feed source assembly with two ports, the coupler assembly with four ports and the main and auxiliary reflecting surfaces with small focal diameter ratio, each polarization corresponds to a single feed port, the dual circular polarization works simultaneously, the structure is compact, and the antenna efficiency is high.
(2) In the working frequency range from X to Ku, the center frequency gain of the ring-focus antenna is not less than 27dBi, the beam width is not less than 5 degrees, the lower frequency gain is not less than 22dBi, the beam width is not less than 8 degrees, the upper frequency gain is not less than 28dBi, and the beam width is not less than 3.5 degrees; the axial ratio of the double circular polarization of the ring-focus antenna is better than 2dB, the standing wave is not more than 1.7 (generally not more than 2, and a better level is achieved when 1.7 is achieved), and the envelope is only phi 300 x 65mm 3 。
(3) The coupler assembly specifically designed in the invention is a coupler in a staggered strip line form, and can be connected with two ports of a feed source assembly, so that double circularly polarized spot beam coverage can be quickly realized in an ultra-wide band.
(4) The structural design of the microstrip plate is beneficial to realizing the power distribution function of the coupler assembly.
(5) According to the ring focus antenna, the ratio of the diameters of the main reflecting surface and the auxiliary reflecting surface is designed to be 3: 1-5: 1, so that the structure is more compact under the condition that double-circular-polarization spot beam coverage is realized in an ultra-wide band, and the ring focus antenna is superior to a ring focus antenna with the ratio of the diameters of the main reflecting surface and the auxiliary reflecting surface not less than 10:1 in the traditional design.
Drawings
Fig. 1 is a schematic structural diagram of a ring-focus antenna according to the present invention.
Fig. 2 is a schematic structural diagram of a coupler assembly according to the present invention.
Fig. 3 is an exploded view of a microstrip panel of the present invention.
FIG. 4 is a simulated gain pattern of the entire ring-focus antenna in horizontal and vertical sections of the lower frequency band between X and Ku frequency bands; x, Ku respectively indicates the X and Ku frequency bands in the radio frequency spectrum, Gain is Gain, Elevation is a vertical section, Azimuth is a horizontal section, and theta is the pitch angle of the ring-focus antenna.
FIG. 5 is a simulated gain directional diagram of the ring-focus antenna of the present invention in the horizontal and vertical tangent planes of the center frequency point of the X-Ku frequency band.
FIG. 6 is a simulated gain pattern of the ring-focus antenna in the horizontal and vertical sections of the edge frequency at the X-Ku frequency band.
FIG. 7 is a simulated axial ratio directional diagram of the ring-focus antenna of the present invention in the horizontal and vertical tangent planes of the X-Ku frequency band; wherein AR is axial ratio, fdown _ Elevation is lower edge frequency of vertical section, fdown _ Azimuth is lower edge frequency of horizontal section, f0_ Elevation is center frequency of vertical section, f0_ Azimuth is center frequency of horizontal section, fup _ Elevation is upper edge frequency of vertical section, and fup _ Azimuth is upper edge frequency of horizontal section.
FIG. 8 is a simulation plot of the voltage standing wave ratios for four ports of a coupler assembly of the present invention; wherein VSWR is a standing wave; VSWR1-4 is the standing wave of port 1-4, fdown is the lower Frequency, fup is the upper Frequency, f0 is the center Frequency, Frequency is the Frequency.
FIG. 9 is a graph of insertion loss simulation among four ports of a coupler assembly of the present invention; wherein LOSS is LOSS; dB (S12) is the insertion loss of the port 1-2; dB (S13) is the insertion loss of ports 1-3; dB (S14) is the isolation of ports 1-4.
FIG. 10 is a graph of phase simulation among four ports of a coupler assembly of the present invention; where PHASE is the PHASE, PHASE (S12) is the PHASE difference of ports 1-2, and PHASE (S13) is the PHASE difference of ports 1-3.
The antenna comprises a main reflecting surface 1, an auxiliary reflecting surface 2, a feed source assembly 3, a coupler assembly 4, a semi-rigid cable 5, a support rod 6, a microstrip plate 7, a plug assembly 8, a cavity 9, a cavity cover plate 10, a metal ground I, a metal ground 12, an upper substrate 13, a metal strip line I, a middle substrate 14, a metal strip line II, a lower substrate 16 and a metal ground II 17.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
Example 1:
the embodiment provides an ultra wide band spot beam ring focal antenna, which can realize double circular polarization spot beam coverage in an ultra wide band, each polarization corresponds to an independent feed port, double circular polarization works simultaneously, the structure is compact, and the antenna efficiency is high.
As shown in fig. 1, the ring focus antenna includes: the device comprises a main reflecting surface 1, an auxiliary reflecting surface 2, a feed source component 3, a coupler component 4, a semi-rigid cable 5 and a supporting rod 6; the central working frequency of the ring focal antenna is 11GHz, and the bandwidth is not less than twice frequency range; the auxiliary reflecting surface 2 is fixed on the main reflecting surface 1 through more than three (preferably, three are uniformly arranged, and the support is stable and small in shielding) support rods 6; the feed source component 3 and the coupler component 4 are both directly installed at the inner bottom of the main reflecting surface 1, the feed source component 3 is provided with two ports, the coupler component 4 is provided with four ports, the two ports of the feed source component 3 are respectively connected with the two ports (the two ports are respectively a through port and a coupling port) of the coupler component 4 through a semi-rigid cable 5, the other two ports of the coupler component 4 are used as two input and output ports (namely the two ports can be input and output) of the complete machine of the circular focus antenna, one input and output port corresponds to left-hand circular polarization, and the other input and output port corresponds to right-hand circular polarization; the main reflecting surface 1 plays a role of main body radiation, a generatrix of the main reflecting surface is a parabola, and a generatrix of the auxiliary reflecting surface 2 is an ellipse; the focal length-diameter ratio of the whole circular-focus antenna is usually 0.3-0.8 (preferably 0.4), and the ratio of the main reflecting surface 1 to the auxiliary reflecting surface 2 is 3: 1-5: 1 (preferably 4: 1).
As shown in fig. 2, the coupler assembly 4 may be a stripline coupler, or may be a four-port power splitting network (such as a microstrip power splitter or a stripline power splitter) in other forms; in this embodiment, the coupler assembly 4 is a stripline coupler, which is composed of a microstrip plate 7, four plug assemblies 8, a cavity 9 and a cavity cover plate 10; the microstrip plate 7 is arranged in the cavity 9 and covered by the cavity cover plate 10, the inside and the outside of the cavity 9 are communicated through four plug assemblies 8, and the four plug assemblies 8 are correspondingly connected with four ports of two metal strip lines in the microstrip plate 7; preferably, the cavity 9 is a rectangular groove-shaped structure, and four plug assemblies 8 are respectively located on two opposite side walls of the cavity 9.
As shown in fig. 3, the microstrip board 7 is formed by laminating three substrates, namely an upper substrate 12, a middle substrate 14 and a lower substrate 16; a metal ground I11 (namely a metal layer) is reserved on the upper surface of the upper substrate 12, and no copper-clad layer is arranged on the lower surface; a metal strip line I13 is etched on the upper surface of the intermediate substrate 14, and no copper-clad layer is arranged on the lower surface; a metal strip line II 15 is etched on the upper surface of the lower substrate 16, the metal strip line II 15 is completely the same as a metal strip line I13 of the intermediate substrate 14 (the structure, the size, the material and the like are the same), the arrangement directions are opposite, the metal strip line I13 and the metal strip line II 15 are staggered by a set distance along the length direction of the intermediate substrate 14, and a metal ground II 17 is reserved on the lower surface of the lower substrate 16; the two ports of the metal strip line I13 are respectively P3 and P4 (interchangeable), the two ports of the metal strip line II 15 are respectively P1 and P2 (interchangeable), if signals are input from the port P1 and output from the ports P2 and P3 with equal amplitude and 90-degree difference, the port P4 is an isolation port; on the contrary, if the signal is input from the port P4 and output from the ports P2 and P3 with equal amplitude and a phase difference of-90 degrees, the port P1 is an isolation port; the shapes of the main bodies of the three layers of substrates are rectangular, the two metal strip lines of the microstrip plate 7 are a metal strip line I13 and a metal strip line II 15 respectively, the level number of the metal strip lines is determined according to the bandwidth requirement of the whole ring-focus antenna, and the level number of the metal strip lines in the embodiment is three.
In this embodiment, the feed source component 3 is any ultra wide band feed source antenna (preferably, the feed source component 3 may be an ultra wide band feed source with high phase center stability in any form), and may be a horn antenna, a ridged horn antenna, a Vivaldi antenna, a dipole antenna, or the like.
In this embodiment, the phase center of the feed source component 3 is located at one focus of an ellipse where the generatrix of the auxiliary reflecting surface 2 is located, and the other focus of the ellipse is superposed with the focus of the main reflecting surface 1; wherein, two generatrices of the sub-reflecting surface 2 share one focus of the ellipse (namely, the focus of the phase center of the feed source component 3).
In this embodiment, the coupler component 4 performs a power distribution function (one input/output port distributes the input energy into two paths of signals with equal amplitude and a phase difference of 90 degrees for output, or combines two paths of input signals with equal amplitude and a phase difference of 90 degrees into one path of signal to be output through the input/output port, and corresponds to left-hand circular polarization; the insertion loss from one input/output port of the coupler assembly 4 to the through port and the coupling port is the same, and the phase difference is 90 degrees; the insertion loss from the other input/output port to the through port and the coupling port is the same, and the phase difference is minus 90 degrees.
In this embodiment, the semi-rigid cable 5 may be replaced with a flexible cable.
As shown in fig. 4, according to the simulation gain pattern display of the whole machine in the lower frequency level and the vertical tangent plane of the X-Ku frequency band, it can be known that the antenna gain is 22.6dBi, the beam width is 8.2 °, and it is demonstrated that the ring focus antenna of the present invention has good radiation performance in the lower frequency;
as shown in fig. 5, according to the simulation gain directional diagram display of the complete machine at the central frequency point level and the vertical tangent plane of the X-Ku frequency band, it can be known that the antenna gain is 27.4dBi, the beam width is 5 °, and it indicates that the ring focus antenna of the present invention has good radiation performance at the central frequency point;
as shown in fig. 6, according to the simulated gain pattern display of the complete machine on the edge frequency level and the vertical tangent plane of the X-Ku frequency band, it can be known that the antenna gain is 28.7dBi, the beam width is 3.7 °, and it is demonstrated that the ring focus antenna of the present invention has good radiation performance at the edge frequency;
as shown in fig. 7, according to the simulation axial ratio directional diagram display of the complete machine in the horizontal and vertical tangent planes of the X-Ku frequency band, it can be known that the axial ratio of the antenna in the whole ultra-wideband is superior to 2dB, which shows that the ring-focus antenna of the present invention has good circular polarization performance in the whole frequency band;
as shown in fig. 8, it can be seen from the voltage standing wave ratio simulation curves of the four ports of the coupler component 4 that the voltage standing wave ratio of the coupler component 4 is better than 1.45 in the bandwidth not less than twice the frequency range, which indicates that the coupler component 4 in the present invention has good port matching performance in the whole ultra wide frequency band;
as shown in fig. 9, it can be seen from the insertion loss simulation curves among the four ports of the coupler assembly 4 that, in the bandwidth not less than twice the frequency range of the coupler assembly 4, the insertion loss from the input/output port to the through port and the coupling port is-3 ± 0.6dB, and the insertion loss from the input/output port to the isolation port is better than-15 dB, which indicates that the coupler assembly 4 in the present invention has good power division (i.e., power distribution) performance in the whole ultra-wideband band; wherein, the ports 1 and 4 are isolated ports, and the ports 2 and 3 are isolated ports;
as shown in fig. 10, it can be seen from the phase simulation curves between the four ports of the coupler assembly 4 that the phase difference from the input/output port to the through port and the coupled port of the coupler assembly 4 is 90 ± 1 ° in the bandwidth not less than twice the frequency range, which indicates that the coupler assembly 4 of the present invention has good phase characteristics in the entire ultra-wide frequency band.
Example 2:
on the basis of the embodiment 1, the feed source assembly 3 is located on the axis of the main reflecting surface 1 and the sub reflecting surface 2, and a set distance is reserved between the feed source assembly and the sub reflecting surface 2.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An ultra-wideband spot beam ring-focus antenna, comprising: the device comprises a main reflecting surface (1), an auxiliary reflecting surface (2), a feed source component (3) and a coupler component (4); the bandwidth of the ultra-wideband is not less than twice the frequency range;
the auxiliary reflecting surface (2) is fixed on the main reflecting surface (1) through more than three supporting rods (6); feed source subassembly (3) and coupler subassembly (4) are all installed in the interior bottom of main reflecting surface (1), feed source subassembly (3) design has two ports, coupler subassembly (4) design has four ports, two of them ports of two ports and coupler subassembly (4) of feed source subassembly (3) correspond and are connected, two other ports of coupler subassembly (4) are as two input/output ports of this ring focal antenna, and an input/output port corresponds left hand circular polarization, another input/output port corresponds right hand circular polarization.
2. The ultra-wideband spot beam ring focal antenna of claim 1, wherein the focal ratio of the ring focal antenna is 0.3-0.8.
3. The ultra-wideband spot beam ring focal antenna according to claim 1, wherein the coupler assembly (4) employs a stripline coupler comprising: the micro-strip plate (7), the plug assembly (8), the cavity (9) and the cavity cover plate (10); the microstrip board (7) is arranged in the cavity (9) and is covered by the cavity cover plate (10), and the four plug components (8) are connected with four ports of two metal strip lines in the microstrip board (7).
4. The ultra-wideband spot beam ring focal antenna according to claim 3, wherein the microstrip plate (7) is formed by laminating three substrates, namely an upper substrate (12), a middle substrate (14) and a lower substrate (16); a metal ground I (11) is reserved on the upper surface of the upper-layer substrate (12); a metal strip line I (13) is etched on the upper surface of the middle substrate (14); a metal strip line II (15) is etched on the upper surface of the lower substrate (16), and a metal ground II (17) is reserved on the lower surface; the two metal strip lines are the same and are arranged in opposite directions, and the two metal strip lines are staggered along the length direction of the middle substrate (14).
5. The ultra-wideband spot beam ring focal antenna according to claim 1, wherein the coupler element (4) employs a microstrip power divider or a stripline power divider.
6. The ultra wide band spot beam ring focal antenna according to any of claims 1-5, wherein the ratio of the diameters of the main reflector (1) and the sub-reflector (2) is 3:1 to 5: 1.
7. The ultra wide band spot beam ring focal antenna according to any of claims 1-5, wherein the phase center of the feed assembly (3) is located at one focus of the ellipse where the generatrix of the secondary reflector (2) is located, and the other focus of the ellipse coincides with the focus of the primary reflector (1); wherein two generatrices of the sub-reflecting surface (2) share one focus of the ellipse.
8. The ultra wide band spot beam ring focal antenna according to any of claims 1-5, characterized in that said feed assembly (3) is a horn or ridged horn antenna or a Vivaldi antenna or a dipole antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210447753.1A CN114883804A (en) | 2022-04-26 | 2022-04-26 | Ultra-wideband spot beam ring focal antenna |
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| CN202210447753.1A CN114883804A (en) | 2022-04-26 | 2022-04-26 | Ultra-wideband spot beam ring focal antenna |
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| CN202210447753.1A Pending CN114883804A (en) | 2022-04-26 | 2022-04-26 | Ultra-wideband spot beam ring focal antenna |
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