CN110085980B - Low-profile broadband feed antenna for feed-forward monopulse reflector antenna - Google Patents
Low-profile broadband feed antenna for feed-forward monopulse reflector antenna Download PDFInfo
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- CN110085980B CN110085980B CN201910390328.1A CN201910390328A CN110085980B CN 110085980 B CN110085980 B CN 110085980B CN 201910390328 A CN201910390328 A CN 201910390328A CN 110085980 B CN110085980 B CN 110085980B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
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- 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
Abstract
The invention provides a low-profile broadband feed antenna for a feed-forward monopulse reflector antenna, comprising: the low-profile broadband linear polarization antenna comprises a 2 x 2 low-profile broadband linear polarization antenna and a low-profile broadband single-pulse comparator, wherein the 2 x 2 low-profile broadband linear polarization antenna comprises four low-profile broadband linear polarization antenna units, and each low-profile broadband linear polarization antenna unit comprises a feed waveguide, a feed gap and a low-profile stepped horn which are sequentially stacked from bottom to top; the low-profile broadband monopulse comparator comprises a first quasi-planar broadband waveguide magic T, a second quasi-planar broadband waveguide magic T, a first low-profile broadband waveguide magic T and a second low-profile broadband waveguide magic T, and the low-profile broadband high-efficiency linearly polarized monopulse feed source antenna is suitable for W wave bands based on a low-loss air metal waveguide structure; under the condition of excellent other performance indexes, the overall section thickness is 2.65mm, and is only about 0.8 free space wavelength of a central frequency point.
Description
Technical Field
The invention belongs to the technical field of millimeter wave monopulse antennas, and particularly relates to a low-profile broadband high-efficiency linear polarization feed source antenna for a feedforward monopulse reflector antenna.
Background
In a radar communication system, the sum and difference beams of the monopulse antenna can be used for acquiring angle and distance information of a target. With the increase of the working frequency and the increase of the atmospheric loss, the high-gain antenna is indispensable for realizing remote detection. Meanwhile, the reflector antenna is known for high gain and high efficiency, so that the single pulse antenna is an effective method for obtaining high gain and difference beams as a feed source of the reflector antenna. In some specific applications, the space behind the reflector antenna is occupied by other devices, so that the radio frequency front end including the feed antenna has to be placed in front of the reflector antenna, and a low-profile feed antenna is urgently needed in order to meet the placement requirement of the limited space. The broadband characteristics of the broadband monopulse feed source antenna mainly depend on the bandwidths of the radiation antenna and the comparator, but the problems of large volume, high section and the like exist in the existing work, and meanwhile, the working frequency is to be improved to a millimeter wave band.
The broadband monopulse feed source antenna can obtain larger communication capacity and has wide application prospect in moving target communication such as inter-satellite communication, missile-borne communication and the like. In addition, the broadband characteristic of the broadband single-pulse feed antenna mainly depends on the bandwidths of the radiation antenna and the comparator, but the existing work has the problems of large volume, high section and the like, and meanwhile, the working frequency is to be improved to a millimeter wave band.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a low-profile broadband high-efficiency linearly polarized monopulse feed antenna suitable for use in a W-band radar system.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a low profile broadband feed antenna for a feed forward monopulse reflector antenna, comprising: a 2 x 2 low-profile broadband linear polarization antenna and a low-profile broadband single pulse comparator,
wherein, 2 x 2 low section broadband linear polarization antenna includes four low section broadband linear polarization antenna units, does in proper order: a first low-profile broadband linear polarization antenna unit 11, a second low-profile broadband linear polarization antenna unit 12, a third low-profile broadband linear polarization antenna unit 13, and a fourth low-profile broadband linear polarization antenna unit 14, wherein the center of the 2 × 2 low-profile broadband linear polarization antenna is the origin;
the first low-profile broadband linearly-polarized antenna unit 11 includes a first feed waveguide 111, a first feed slot 112, and a first low-profile stepped horn 113 stacked in this order from bottom to top; the first feed slot 112 is aligned with the center of the first low-profile stepped horn 113, the first feed slot 112 and the first low-profile stepped horn 113 form a stepped structure, and the center of the first feed slot 112 is deviated to the right side of the center line of the wide side of the first feed waveguide 111 along the electromagnetic wave feed direction;
the second low-profile broadband linear polarization antenna unit 12 comprises a second feed waveguide 121, a second feed gap 122 and a second low-profile stepped horn 123 which are stacked in sequence from bottom to top, the second feed gap 122 is aligned with the center of the second low-profile stepped horn 123, the second feed gap 122 and the second low-profile stepped horn 123 form a stepped structure, and the center of the second feed gap 122 is deviated to the left side of the center line of the wide side of the second feed waveguide 121 along the feed direction;
the third low-profile broadband linear polarization antenna unit 13 is formed by rotating the first low-profile broadband linear polarization antenna unit 11 by 180 degrees around the origin;
the fourth low-profile broadband linear polarization antenna unit 14 is formed by rotating the second low-profile broadband linear polarization antenna unit 12 by 180 degrees around the origin;
the low-profile broadband single-pulse comparator comprises a first quasi-planar broadband waveguide magic T21, a second quasi-planar broadband waveguide magic T23, a first low-profile broadband waveguide magic T22 and a second low-profile broadband waveguide magic T24, wherein the first quasi-planar broadband waveguide magic T21 and the second quasi-planar broadband waveguide magic T23 are the same in structural size; the first low-profile broadband waveguide magic T22 and the second low-profile broadband waveguide magic 24 are identical in structural size except that the length of the E arm is different; an output port of the first quasi-planar broadband waveguide magic T21 connected with input ports of the first low-profile broadband linearly-polarized antenna element 11 and the fourth low-profile broadband linearly-polarized antenna element 14; the output port of the second quasi-planar broadband waveguide magic T23 is connected with the input ports of the second low-profile broadband linearly-polarized antenna unit 12 and the third low-profile broadband linearly-polarized antenna unit 13; the output port of the first low-profile broadband waveguide magic T22 is connected with the H-arm of the first quasi-planar broadband waveguide magic T21 and the second quasi-planar broadband waveguide magic T23, respectively; the output ports of the second low-profile broadband waveguide magic T24 are connected with the E-arms of the first and second quasi-planar broadband waveguide magic T21 and T23, respectively.
Preferably, the size of the E arm of the first low-profile broadband waveguide magic T22 is the size of the W-band standard waveguide port, and the feed port of the W-band standard waveguide connected to the E arm is the fourth port 34; the size of the E-arm of the second low-profile broadband waveguide magic T24 is also the size of the W-band standard waveguide port, and the W-band standard waveguide feed port connected to the E-arm is the second port 32.
Preferably, the first standard waveguide-low-profile waveguide transition structure 25 is used for matching and connecting the W-band standard waveguide and the H-arm of the first low-profile broadband waveguide magic T22, and the W-band standard waveguide feed port matching and connecting the H-arm is the third port 33.
Preferably, the second standard waveguide-low-profile waveguide transition structure 26 is used for matching and connecting the W-band standard waveguide and the H-arm of the second low-profile broadband waveguide magic T24, and the W-band standard waveguide feed port matching and connecting the H-arm is the first port 31.
Preferably, the height and width of the first feed waveguide 111 are 0.6mm and 2mm, respectively, the size of the first feed slot 112 is 2.2mm × 1mm × 0.2mm, the first low-profile stepped horn 113 is composed of two layers of steps, the thickness of each layer of step is 0.4mm, the calibers of the two layers of steps from top to bottom are 2.7mm × 2.4mm and 2.7mm × 1.8mm, respectively, the center position of the first feed slot 112 coincides with the center position of the first low-profile stepped horn 113, and the center position is located at the right side of the center line of the wide side of the first feed waveguide 111 by 0.42mm, and the distance from the end of the first feed waveguide 111 is 1 mm.
Preferably, the height and width of the second feed waveguide 121 are 0.6mm and 2mm, respectively, the size of the second feed slot 122 is 2.2mm × 1mm × 0.2mm, the second low-profile stepped horn 123 is composed of two layers of steps, the thickness of each layer of step is 0.4mm, and the calibers of the two layers of steps from top to bottom are 2.7mm × 2.4mm and 2.7mm × 1.8mm, respectively; the second feed slot 122 coincides with the central position of the second low-profile stepped horn 123, which is located 0.42mm to the left of the center line of the broad side of the second feed waveguide 121, and is located 1mm from the end of the second feed waveguide 121.
Preferably, the distance between the center positions of two adjacent low-profile stepped horns is 3 mm.
Preferably, the first quasi-planar broadband waveguide magic T21 comprises a first E-arm feed waveguide 211 on the lower layer, a first intermediate coupling slot 212, and a first H-plane T-shaped waveguide power divider 213 on the upper layer, and the thicknesses of the first E-arm feed waveguide 211, the first intermediate coupling slot 212, and the first H-plane T-shaped waveguide power divider 213 are 0.6mm, 0.2mm, and 0.6mm in sequence.
Preferably, the first low-profile broadband waveguide magic T22 comprises a second E-arm feed waveguide 221 on the lower layer and a second H-plane T-shaped waveguide power divider 222 on the upper layer, and the thicknesses of the two are 1.05mm and 0.6mm in sequence.
The invention has the beneficial effects that: the low-profile broadband high-efficiency linearly polarized monopulse feed source antenna is suitable for W wave bands based on a low-loss air metal waveguide structure; under the condition of excellent other performance indexes (the working frequency is 80.4 GHz-98.4 GHz, the relative bandwidth is 20.1%, the efficiency of the inner diameter of the band is more than 78%), the thickness of the whole section is 2.65mm, and the wavelength is only about 0.8 free space wavelength of a central frequency point.
Drawings
Fig. 1 is a schematic diagram of a first low-profile broadband linearly polarized antenna element of the present invention.
Fig. 2 is a schematic diagram of a second low-profile broadband linearly polarized antenna unit of the present invention.
Fig. 3 is a schematic diagram of the structure of the 2 x 2 low-profile broadband linear polarization antenna of the present invention.
Figure 4 is a schematic diagram of a first quasi-planarized broadband waveguide magic T structure of the present invention.
Fig. 5 is a schematic view of a first low-profile broadband waveguide magic T of the present invention.
FIG. 6 is a schematic diagram of a 2 × 2 low-profile broadband single-pulse feed antenna externally connected with a standard waveguide according to the present invention.
FIG. 7 shows the simulation results of the reflection coefficients of the working ports of the low-profile broadband monopulse feed antenna of the present invention.
FIG. 8 is a simulation of the sum and difference beam patterns at xoz for a low profile broadband monopulse feed antenna of the present invention at 90 GHz.
FIG. 9 shows the simulation results of the low-profile broadband single-pulse feed antenna of the present invention in the yoz plane at 90GHz sum beam and difference beam patterns.
Fig. 10 is a simulation result of the sum beam gain of the low profile broadband monopulse feed antenna of the present invention over the operating bandwidth.
Wherein 11 is a first low-profile broadband linear polarization antenna unit, 111 is a first feed waveguide, 112 is a first feed gap, 113 is a first low-profile ladder horn, 12 is a second low-profile broadband linear polarization antenna unit, 121 is a second feed waveguide, 122 is a second feed gap, 123 is a second low-profile ladder horn, 13 is a third low-profile broadband linear polarization antenna unit, 14 is a fourth low-profile broadband linear polarization antenna unit, 21 is a first quasi-planar broadband waveguide magic T, 211 is a first E-arm feed waveguide, 212 is a first intermediate coupling gap, 213 is a first H-plane T-shaped waveguide power divider, 22 is a first low-profile broadband waveguide magic T, 221 is a second E-arm feed waveguide, 222 is a second H-plane T-shaped waveguide power divider, 23 is a second quasi-planar broadband magic T, 24 is a second low-profile broadband waveguide magic T, 25 is a first standard waveguide-low-profile waveguide transition structure, a second standard waveguide-low profile waveguide transition structure is shown at 26, a first port at 31, a second port at 32, a third port at 33, and a fourth port at 34.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
A low profile broadband feed antenna for a feed forward monopulse reflector antenna, comprising: a 2 x 2 low-profile broadband linear polarization antenna and a low-profile broadband single pulse comparator,
wherein, 2 x 2 low section broadband linear polarization antenna includes four low section broadband linear polarization antenna units, does in proper order: a first low-profile broadband linear polarization antenna unit 11, a second low-profile broadband linear polarization antenna unit 12, a third low-profile broadband linear polarization antenna unit 13, and a fourth low-profile broadband linear polarization antenna unit 14, wherein the center of the 2 × 2 low-profile broadband linear polarization antenna is the origin;
the first low-profile broadband linearly-polarized antenna unit 11 includes a first feed waveguide 111, a first feed slot 112, and a first low-profile stepped horn 113 stacked in this order from bottom to top; the first feed slot 112 is aligned with the center of the first low-profile stepped horn 113, the first feed slot 112 and the first low-profile stepped horn 113 form a stepped structure, and the center of the first feed slot 112 is deviated to the right side of the center line of the wide side of the first feed waveguide 111 along the electromagnetic wave feed direction;
the second low-profile broadband linear polarization antenna unit 12 comprises a second feed waveguide 121, a second feed gap 122 and a second low-profile stepped horn 123 which are stacked in sequence from bottom to top, the second feed gap 122 is aligned with the center of the second low-profile stepped horn 123, the second feed gap 122 and the second low-profile stepped horn 123 form a stepped structure, and the center of the second feed gap 122 is deviated to the left side of the center line of the wide side of the second feed waveguide 121 along the feed direction;
the third low-profile broadband linear polarization antenna unit 13 is formed by rotating the first low-profile broadband linear polarization antenna unit 11 by 180 degrees around the origin;
the fourth low-profile broadband linear polarization antenna unit 14 is formed by rotating the second low-profile broadband linear polarization antenna unit 12 by 180 degrees around the origin;
the low-profile broadband single-pulse comparator comprises a first quasi-planar broadband waveguide magic T21, a second quasi-planar broadband waveguide magic T23, a first low-profile broadband waveguide magic T22 and a second low-profile broadband waveguide magic T24, wherein the first quasi-planar broadband waveguide magic T21 and the second quasi-planar broadband waveguide magic T23 are the same in structural size; the first low-profile broadband waveguide magic T22 and the second low-profile broadband waveguide magic 24 are identical in structural size except that the length of the E arm is different; an output port of the first quasi-planar broadband waveguide magic T21 connected with input ports of the first low-profile broadband linearly-polarized antenna element 11 and the fourth low-profile broadband linearly-polarized antenna element 14; the output port of the second quasi-planar broadband waveguide magic T23 is connected with the input ports of the second low-profile broadband linearly-polarized antenna unit 12 and the third low-profile broadband linearly-polarized antenna unit 13; the output port of the first low-profile broadband waveguide magic T22 is connected with the H-arm of the first quasi-planar broadband waveguide magic T21 and the second quasi-planar broadband waveguide magic T23, respectively; the output ports of the second low-profile broadband waveguide magic T24 are connected with the E-arms of the first and second quasi-planar broadband waveguide magic T21 and T23, respectively.
The E arm of the first low-profile broadband waveguide magic T22 is the size of a W-band standard waveguide port, and a W-band standard waveguide feed port connected with the E arm is the fourth port 34; the size of the E-arm of the second low-profile broadband waveguide magic T24 is also the size of the W-band standard waveguide port, and the W-band standard waveguide feed port connected to the E-arm is the second port 32.
The first standard waveguide-low profile waveguide transition structure 25 is used for matching connection of a W-band standard waveguide and an H-arm of the first low-profile broadband waveguide magic T22, and a W-band standard waveguide feed port in matching connection with the H-arm is a third port 33.
The second standard waveguide-low profile waveguide transition structure 26 is used for matching and connecting the W-band standard waveguide and an H-arm of the second low profile broadband waveguide magic T24, and a W-band standard waveguide feed port matching and connecting the H-arm is the first port 31.
The height and the width of the first feed waveguide 111 are respectively 0.6mm and 2mm, the size of the first feed gap 112 is 2.2mm × 1mm × 0.2mm, the first low-profile stepped horn 113 is composed of two layers of steps, the thickness of each layer of step is 0.4mm, the calibers of the two layers of steps from top to bottom are respectively 2.7mm × 2.4mm and 2.7mm × 1.8mm, the center position of the first feed gap 112 and the first low-profile stepped horn 113 coincides, meanwhile, the center position is located on the right side of the center line of the wide side of the first feed waveguide 111 by 0.42mm, and the distance from the tail end of the first feed waveguide 111 is 1 mm.
The height and width of the second feed waveguide 121 are 0.6mm and 2mm, respectively, the size of the second feed gap 122 is 2.2mm × 1mm × 0.2mm, the second low-profile stepped horn 123 is composed of two layers of steps, the thickness of each layer of step is 0.4mm, and the calibers of the two layers of steps from top to bottom are 2.7mm × 2.4mm and 2.7mm × 1.8mm, respectively; the second feed slot 122 coincides with the central position of the second low-profile stepped horn 123, which is located 0.42mm to the left of the center line of the broad side of the second feed waveguide 121, and is located 1mm from the end of the second feed waveguide 121.
The distance between the center positions of two adjacent low-profile stepped horns is 3 mm.
The first quasi-planar broadband waveguide magic T21 comprises a first E-arm feed waveguide 211 on the lower layer, a first intermediate coupling slot 212 and a first H-surface T-shaped waveguide power divider 213 on the upper layer, and the thicknesses of the first E-arm feed waveguide 211, the first intermediate coupling slot 212 and the first H-surface T-shaped waveguide power divider 213 are 0.6mm, 0.2mm and 0.6mm in sequence.
The first low-profile broadband waveguide magic T22 comprises a second E-arm feed waveguide 221 on the lower layer and a second H-plane T-shaped waveguide power divider 222 on the upper layer, and the thicknesses of the two are 1.05mm and 0.6mm in sequence.
When different W-band standard waveguides are fed, the beam pattern of the feed antenna is shown in table 1. Since the W-band standard waveguide feed fourth port 34 outputs a double difference beam in actual operation, no operation is required.
TABLE 1 broadband monopulse feed source antenna state table
The simulation results of the 2 × 2 low-profile broadband high-efficiency linearly polarized monopulse feed antenna are shown in fig. 7 to 10. As can be seen from the figure, the working frequency of the present embodiment is 80.4 GHz-98.4 GHz, the relative bandwidth is 20.1%, the efficiency of the inner diameter of the band is larger than 78%, the zero depth of the difference beam is smaller than-28.5 dB, the thickness of the whole section is 2.65mm, and the total section is about 0.8 free space wavelength of the central frequency point.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A low profile broadband feed antenna for a feed forward monopulse reflector antenna, comprising: a 2 x 2 low-profile broadband linear polarization antenna and a low-profile broadband single pulse comparator,
wherein, 2 x 2 low section broadband linear polarization antenna includes four low section broadband linear polarization antenna units, does in proper order: the antenna comprises a first low-profile broadband linear polarization antenna unit (11), a second low-profile broadband linear polarization antenna unit (12), a third low-profile broadband linear polarization antenna unit (13) and a fourth low-profile broadband linear polarization antenna unit (14), wherein the center of the 2 multiplied by 2 low-profile broadband linear polarization antenna is the origin;
the first low-profile broadband linear polarization antenna unit (11) comprises a first feed waveguide (111), a first feed gap (112) and a first low-profile stepped horn (113) which are sequentially stacked from bottom to top; the first feed gap (112) is aligned with the center of the first low-profile stepped horn (113), the first feed gap (112) and the first low-profile stepped horn (113) form a stepped structure, and the center of the first feed gap (112) is deviated to the right side of the center line of the wide side of the first feed waveguide (111) along the electromagnetic wave feed direction;
the second low-profile broadband linearly polarized antenna unit (12) comprises a second feed waveguide (121), a second feed gap (122) and a second low-profile stepped horn (123) which are sequentially stacked from bottom to top, the second feed gap (122) is aligned with the center of the second low-profile stepped horn (123), the second feed gap (122) and the second low-profile stepped horn (123) form a stepped structure, and the center of the second feed gap (122) deviates to the left side of the central line of the wide side of the second feed waveguide (121) along the feed direction;
the third low-profile broadband linear polarization antenna unit (13) is formed by rotating the first low-profile broadband linear polarization antenna unit (11) by 180 degrees around the origin;
the fourth low-profile broadband linear polarization antenna unit (14) is formed by rotating the second low-profile broadband linear polarization antenna unit (12) by 180 degrees around the origin;
the low-profile broadband monopulse comparator comprises a first quasi-planar broadband waveguide magic T (21), a second quasi-planar broadband waveguide magic T (23), a first low-profile broadband waveguide magic T (22) and a second low-profile broadband waveguide magic T (24), wherein the first quasi-planar broadband waveguide magic T (21) and the second quasi-planar broadband waveguide magic T (23) are the same in structural size; the first low-profile broadband waveguide magic T (22) and the second low-profile broadband waveguide magic T (24) have the same structural size except that the length of the E arm is different; an output port of the first quasi-planar broadband waveguide magic T (21) is connected with input ports of the first low-profile broadband linear polarization antenna unit (11) and the fourth low-profile broadband linear polarization antenna unit (14); an output port of the second quasi-planar broadband waveguide magic T (23) is connected with input ports of the second low-profile broadband linear polarization antenna unit (12) and the third low-profile broadband linear polarization antenna unit (13); the output port of the first low-profile broadband waveguide magic T (22) is respectively connected with the H arms of the first quasi-planar broadband waveguide magic T (21) and the second quasi-planar broadband waveguide magic T (23); and the output port of the second low-profile broadband waveguide magic T (24) is respectively connected with the E arms of the first quasi-planar broadband waveguide magic T (21) and the second quasi-planar broadband waveguide magic T (23).
2. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the E arm of the first low-profile broadband waveguide magic T (22) is the size of a W-band standard waveguide port, and a W-band standard waveguide feed port connected with the E arm is a fourth port (34); the E arm of the second low-profile broadband waveguide magic T (24) is also the size of the W-band standard waveguide port, and the W-band standard waveguide feed port connected with the E arm is a second port (32).
3. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the first standard waveguide-low-profile waveguide transition structure (25) is used for matching connection of a W-band standard waveguide and an H arm of the first low-profile broadband waveguide magic T (22), and a W-band standard waveguide feed port in matching connection with the H arm is a third port (33).
4. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the second standard waveguide-low-profile waveguide transition structure (26) is used for matching connection of the W-band standard waveguide and an H arm of a second low-profile broadband waveguide magic T (24), and a W-band standard waveguide feed port in matching connection with the H arm is a first port (31).
5. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the height and the width of the first feed waveguide (111) are respectively 0.6mm and 2mm, the size of the first feed gap (112) is 2.2mm multiplied by 1mm multiplied by 0.2mm, the first low-profile stepped horn (113) is composed of two layers of steps, the thickness of each layer of step is 0.4mm, the calibers of the two layers of steps from top to bottom are respectively 2.7mm multiplied by 2.4mm and 2.7mm multiplied by 1.8mm, the center positions of the first feed gap (112) and the first low-profile stepped horn (113) are superposed, meanwhile, the center position is 0.42mm on the right side of the center line of the wide side of the first feed waveguide (111), and the distance from the tail end of the first feed waveguide (111) is 1 mm.
6. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the height and the width of the second feed waveguide (121) are respectively 0.6mm and 2mm, the size of the second feed gap (122) is 2.2mm multiplied by 1mm multiplied by 0.2mm, the second low-profile stepped horn (123) is composed of two layers of steps, the thickness of each layer of step is 0.4mm, and the calibers of the two layers of steps from top to bottom are respectively 2.7mm multiplied by 2.4mm and 2.7mm multiplied by 1.8 mm; the second feeding gap (122) is superposed with the central position of the second low-profile stepped horn (123), and the central position is positioned at the left side of the central line of the wide side of the second feeding waveguide (121) by 0.42mm, and the distance from the tail end of the second feeding waveguide (121) is 1 mm.
7. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the distance between the center positions of two adjacent low-profile stepped horns is 3 mm.
8. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the first quasi-planar broadband waveguide magic T (21) comprises a first E-arm feed waveguide (211) on the lower layer, a first middle coupling slot (212) and a first H-surface T-shaped waveguide power divider (213) on the upper layer, and the thicknesses of the first E-arm feed waveguide, the first middle coupling slot and the first H-surface T-shaped waveguide power divider are 0.6mm, 0.2mm and 0.6mm in sequence.
9. A low profile broadband feed antenna for a feed forward monopulse reflector antenna as claimed in claim 1, wherein: the first low-profile broadband waveguide magic T (22) comprises a second E-arm feed waveguide (221) on the lower layer and a second H-surface T-shaped waveguide power divider (222) on the upper layer, and the thicknesses of the two are 1.05mm and 0.6mm in sequence.
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| CN207818904U (en) * | 2017-12-28 | 2018-09-04 | 西安天安电子科技有限公司 | A kind of integrated waveguide slot array antenna |
| CN108987946B (en) * | 2018-07-30 | 2020-09-01 | 北京航空航天大学 | Slot array antenna based on substrate integrated waveguide and power distribution network thereof |
| CN109167182B (en) * | 2018-07-31 | 2021-06-01 | 电子科技大学 | Printed low-profile feed antenna for feedforward monopulse reflector antenna |
| CN109149116B (en) * | 2018-08-23 | 2020-06-09 | 西安空间无线电技术研究所 | Novel dual-polarized horn antenna |
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2019
- 2019-05-10 CN CN201910390328.1A patent/CN110085980B/en active Active
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