CN115064865B - Single pulse substrate integrated waveguide collinear slot array antenna - Google Patents
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
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- 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
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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- 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
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Abstract
The invention provides a single-pulse substrate integrated waveguide collinear slot array antenna, wherein a network feed structure is arranged on a first dielectric substrate, the network feed structure comprises a network microstrip feed coupling slot, and the network microstrip feed coupling slot is parallel to an H surface of the antenna; a substrate integrated collinear slit unit is arranged on the first metal layer and comprises at least one row of radiation slits; the second dielectric substrate is provided with waveguide walls at positions corresponding to the radiation gaps, and radiation waveguides in the second dielectric substrate are in mirror symmetry about a xoz plane; and a differential network feed structure is arranged on the third medium substrate, the differential network feed structure comprises a differential network microstrip feed coupling gap, and the differential network microstrip feed coupling gap is parallel to the E surface of the antenna. The cross polarization of the antenna array is reduced by arranging the collinear slot waveguide, and the monopulse network structure is realized by microstrip slot coupling feed, so that the antenna can realize sum and difference wave beams in an X frequency band, and monopulse performance is ensured.
Description
Technical Field
The invention relates to the field of antennas of electronic communication technology, in particular to a single-pulse substrate integrated waveguide collinear slot array antenna.
Background
As the technology in the field of communication tracking radar is more and more mature, the application of the waveguide slot antenna which has a compact structure and is easy to process is more and more extensive. The ultra-low side lobe characteristic of the waveguide slot antenna is very suitable for tracking radars carried on various aircrafts and ships, and the waveguide slot antenna is remarkably focused in the field by combining the characteristics of light weight and small volume.
The monopulse radar antenna is used as a high-precision tracking antenna, and is widely applied to the military field and used for angle measurement and distance measurement of targets. The positioning and detection are important applications of the monopulse radar, and the monopulse system radar can not be interfered by fading fluctuation of echo waves while rapidly acquiring amplitude information of reflected signals and difference beams, has high information data rate acquisition speed, has certain strong anti-interference capability, and is often applied to aspects of passive positioning, ground and guard communication, missile guidance and the like.
The existing SIW-based single pulse sum and difference structure implementation mainly comprises two methods: firstly, a magic T structure is used, so that the method is a three-dimensional structure, the bandwidth realized by the method is wider, the traditional waveguide magic T occupies a larger volume and is not beneficial to integration, and the SIW magic T is relatively smaller in volume and easier to integrate; and secondly, the phase shifting is realized by a bridge phase shifting method, which is a planar structure but has a narrow bandwidth.
The magic T is an important microwave power distribution and synthesis device, and the waveguide magic T has the advantages of large power capacity, good port performance and the like, and Li Kejuan and the like in the national microwave millimeter wave conference discussion (under the heading of a novel broadband waveguide magic T design [ C ]///. 2021), 2021:202-204.DOI:10.26914/c.cnkihy.2021.023613 propose a broadband waveguide magic T which is subjected to impedance matching by using a blending cone, a blending ladder and a metal film. The relative bandwidth reaches 47.5%, and the working frequency band of the BJ100 waveguide is completely covered. Meanwhile, the insertion loss is smaller than 0.1dB, and the method has good amplitude consistency. Kim et al, prototype Ku-band dual polarization SIW monopulse antenna, "Proceedings of 2014 rd Asia-Pacific Conference on Antennas and Propagation,2014, pp.565-568, doi:10.1109/APCAP.2014.6992556," millimeter wave monopulse antenna based on SIW technology, the monopulse antenna array being integrated on a double layer plane, each subarray being composed of an 8X 5 slot array of + -45 deg.. The test results show that: at the center frequency, the maximum gain of the sum beam reaches 22dB, the first side lobe level is below-10 dB, and the maximum zero depth of the difference beam is-27 dB. Liu et al, in "Substrate Integrated Waveguide (SIW) Monopulse Slot Antenna Array," in IEEE Transactions on Antennas and Propagation, vol.57, no.1, pp.275-279, jan.2009, doi:10.1109/TAP.2008.2009743. Propose a low profile Ka-band SIW monopulse antenna, the whole antenna array is integrated on a single-layer dielectric substrate, the port is fed by microstrip through slot array radiation energy, the structure is compact, the requirement of the low profile antenna is met, but the monopulse technology is complex in design, and in order to enable slots to cut the same directional current of the metal wall surface, the slots are staggered relative to the waveguide center line, resulting in asymmetric antenna patterns and high cross polarization.
However, the sum and difference comparison network composed of the magic T has huge structure, difficult processing, design and manufacture and high cost. The microstrip structure is not suitable for high-power emission, but is relatively suitable for airborne or aerospace application with low cost of a light planar structure, such as Chen Xiaoguang, and the like, in the university of Nanjing process, development of microstrip phased array antennas, microstrip monopulse antennas and MEMS phase shifters [ D ], the 180-degree directional coupler is formed by combining an O/90-degree 3dB coupler with a 90-degree phase shifter in 2003, so that the monopulse comparator of the microstrip structure is realized, a sum and difference comparison network and the microstrip antenna array are integrated on the same plane, and the zero depth of the finally obtained monopulse antenna array in the bandwidth range is better than-25 dB, but the surface area of the antenna is too large and the bandwidth is narrower based on the phase shifter principle, so that the integration and the application are not facilitated.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the single-pulse substrate integrated waveguide collinear slot array antenna, cross polarization of an antenna array is reduced by arranging the collinear slot waveguide, a single-pulse network structure is realized by microstrip slot coupling feed, the structure is simplified, the antenna can realize sum and difference beams in an X frequency band, single-pulse performance is ensured, and the antenna is easy to integrate.
In order to achieve the aim of the invention, the single-pulse substrate integrated waveguide collinear slot array antenna provided by the invention is provided with a first dielectric substrate, a first metal layer, a second dielectric substrate, a second metal layer and a third dielectric substrate from top to bottom in sequence,
the first dielectric substrate is provided with a network feed structure, the network feed structure comprises a network feed port arranged on the first dielectric substrate, a network feed microstrip and a network microstrip feed coupling gap arranged on the first metal layer, and the network microstrip feed coupling gap is parallel to the H surface of the antenna;
a substrate integrated collinear slit unit is arranged on the first metal layer, and comprises at least one row of radiation slits, and each row of radiation slits comprises a plurality of collinear radiation slits;
the second dielectric substrate is provided with waveguide walls at positions corresponding to the radiation gaps, and radiation waveguides in the second dielectric substrate are in mirror symmetry about a xoz plane;
the third dielectric substrate is provided with a differential network feed structure, the differential network feed structure comprises a differential network feed interface arranged on the third dielectric substrate, a differential network feed microstrip connected with the differential network feed interface and a differential network microstrip feed coupling gap arranged on the second metal layer, and the differential network microstrip feed coupling gap is parallel to the E plane of the antenna.
Further, the sum network feed microstrip and the difference network feed microstrip are both metal layers.
Further, the materials of the first dielectric substrate, the second dielectric substrate and the third dielectric substrate are Rogers RO4003.
Further, the dielectric constants of the first dielectric substrate, the second dielectric substrate and the third dielectric substrate are 3.55.
Further, in the substrate integrated collinear slot unit, the distance between the waveguide wall and the waveguide center line, which are respectively arranged in each radiation slot, is adjustable.
Further, the method comprises the steps of,
further, the microstrip feed coupling slot is a butterfly slot.
Further, the differential network microstrip feed coupling gap is a butterfly gap.
Further, the antenna comprises two rows of radiating slots.
Further, the antenna is capable of operating in the X-band 9-10.5GHz.
Compared with the prior art, the invention at least has the following beneficial effects:
1. compared with the traditional antenna with non-collinear slots, the antenna unit with low cross polarization and high gain for the collinear slot waveguide is realized.
2. The design of the microstrip slot coupling feed structure simplifies the structure of the traditional magic T and realizes the single pulse performance of the SIW-based collinear slot antenna.
3. The electric field inside the waveguide is disturbed by moving the position of the waveguide wall relative to the waveguide center line, so that the collinear slot waveguide is realized, the cross polarization of the antenna array is reduced, and the high-gain and low-cross polarization antenna is realized.
4. The single-pulse network structure is realized through microstrip slot coupling feed, the design of the magic T structure is greatly simplified, the antenna can realize sum and difference beams in an X frequency band, the single-pulse performance is ensured, and the antenna is easy to integrate.
5. The microstrip coupling gap adopts a butterfly shape with a small middle and narrow two sides, so that energy can be coupled to the radiation waveguide, the radiation efficiency is improved, and the bandwidth can be expanded.
Drawings
Fig. 1 is an overall structure of a single-pulse substrate integrated waveguide collinear slot array antenna provided by an embodiment of the present invention.
Fig. 2 is a multilayer structure diagram of a single-pulse substrate integrated waveguide collinear slot array antenna according to an embodiment of the present invention, where (a) is a side surface, i.e., a front view, of the antenna, and (b) is a top view of the antenna.
Fig. 3 is a schematic diagram of a SIW collinear slot structure and a waveguide electric field according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a network feed structure provided by an embodiment of the present invention.
Fig. 5 is a schematic diagram of a differential network feed structure according to an embodiment of the present invention.
Fig. 6 is a diagram of S parameters in an embodiment of the present invention.
Fig. 7 is a schematic diagram of isolation S21 in the embodiment of the present invention.
Fig. 8 is a diagram of the gain of a poor network antenna in an embodiment of the invention.
Fig. 9 is a gain pattern for a network antenna in accordance with an embodiment of the present invention.
Fig. 10 is a gain pattern at 9.8GHz, 9.9GHz, 10GHz and for a network antenna in an embodiment of the invention.
Fig. 11 is a gain pattern of the differential network antenna at 9.8GHz, 9.9GHz, 10GHz in an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the single pulse substrate integrated waveguide collinear slot array antenna provided by the invention comprises a first dielectric substrate 100, a first metal layer 200, a second dielectric substrate 300, a second metal layer 400 and a third dielectric substrate 500 which are sequentially arranged from top to bottom, wherein microstrip arranged on the first dielectric substrate 100 and the third dielectric substrate 500 are used for feeding through slot coupling. In some embodiments of the invention, the three substrates each used a Rogers RO4003 (tm) plate with a dielectric constant of 3.55.
In some embodiments of the present invention, an antenna is provided that is capable of operating in the X-band 9-10.5GHz.
In some embodiments of the present invention, the thickness of the second dielectric substrate 300 is 1.524mm.
Referring to fig. 1, a first dielectric substrate 100 is provided with a network feeding structure, and the network feeding structure includes a network feeding port 1, a network feeding microstrip 2 and a network microstrip feeding coupling slot 3, which are disposed on the first dielectric substrate 100, and the network microstrip feeding coupling slot 3 is parallel to an H plane of the antenna; the first metal layer 200 is provided with a substrate-integrated collinear slit unit, and the substrate-integrated collinear slit unit comprises at least one row of radiation slits 4;
the second dielectric substrate 300 is provided with waveguide walls at positions corresponding to the radiation slots 4, and the radiation waveguides in the second dielectric substrate 300 are mirror symmetrical about the xoz plane, and each row of radiation slots 4 comprises a plurality of collinear radiation slots; the third dielectric substrate 500 is provided with a differential network feed structure, the differential network feed structure comprises a differential network feed interface 5 arranged on the third dielectric substrate 500, a differential network feed microstrip 6 connected with the differential network feed interface 5, and a differential network microstrip feed coupling gap 7 arranged on the second metal layer 400, and the microstrip feed coupling gap 7 is parallel to the E plane of the antenna. And the energy of the network is fed into the second dielectric substrate 300 through the coupling slot 3 of the network microstrip feed, and the energy in the differential network is radiated through the radiation slot 4.
The four walls of the waveguide are all provided with current distribution, the narrow sides are vertically distributed currents, the wide sides are alternately gathered or diverged with half waveguide wavelength as a period, the slots are required to cut the current when radiating energy, and the current in the same direction is generally required to be cut, so that the gain is large, and when the slots are opened on the wide sides of the waveguide, the slots are staggered along the central line of the wide walls of the waveguide to cut the current in the same direction.
In some embodiments of the invention, the substrate is integrated in a collinear slot unit, and the distance between the waveguide wall and the waveguide centerline of each radiation slot 4 is adjustable. The embodiment of the invention adopts the position of the movable waveguide wall relative to the central line to disturb the electric field distribution inside the SIW, thereby realizing the SIW collinear slot antenna. A schematic of the structure of the substrate integrated collinear slit unit is shown in fig. 3.
In some embodiments of the invention, the substrate integrated collinear slit unit is designed to have two rows of 8 radiation slits 4, but may be set to other values in other embodiments. The two rows of 8 slots are not large in number, the gain is high, the conformal effect on the military radar is good, only 4 slots are shown in fig. 3, the dielectric substrate is Rogers RO4003 (tm), the thickness of the substrate is 1.524mm, the dielectric constant is 3.55, and the loss tangent is 0.0027. The dashed line in the figure represents the center line of the waveguide, the arrow represents the current distribution of the SIW waveguide wall after moving the waveguide wall up and down relative to the center line, and it can be seen that after moving the waveguide wall, the relative position of the electric field inside the SIW also changes, and accordingly the position of the current of the waveguide wall also moves, and at this time, the collinear slot can cut the current in the same direction on the SIW waveguide wall to form in-phase radiation and overlap in space. The mode can reduce the cross polarization of the antenna, ensure the symmetry of the directional diagram and improve the performance of the antenna due to the collineation of the gaps. In addition, in order to improve the gain of the SIW antenna, the distance of the waveguide wall corresponding to each slot, which deviates from the central line of the waveguide, can be adjusted, so that the voltage of each slot is distributed in a constant amplitude manner as much as possible, and higher gain is obtained.
A series of waveguides are placed side by side, a plurality of gaps are formed on the surface of the waveguides, the single pulse function is realized by controlling the waveguides through a sum-difference network, and the antenna is a single pulse waveguide gap antenna. The SIW collinear slit units are arranged according to 1 multiplied by 2 to form an array, the single pulse is realized mainly by realizing sum-difference network feed, the traditional single pulse network mainly adopts a magic T structure, in order to simplify the structure of the feed network, the former makes many researches, the method adopted by the improvement design of the magic T is to connect two waveguides in parallel waveguide public narrow-side slit gaps, and the sum-difference calculation is realized by the phase difference caused to the two input signals, and the method has smaller volume but needs a longer 90-degree phase compensation line; the novel planar waveguide magic T is also adopted, and the E arm and the H arm are connected through the coupling gap, so that the volume and the performance are both considered.
Although the planar waveguide magic T has been improved over the conventional magic T, the structure is still more complex, and the invention further simplifies the structure. The single pulse structure provided by the invention comprises a sum and difference network, a sum network feeding structure for realizing sum network feeding is arranged on a first medium substrate 100, a difference network feeding structure for realizing difference network feeding is arranged on a third medium substrate 500, and the two parts of structures refer to fig. 4 and 5, wherein the sum network feeding structure comprises a sum network feeding port 1 arranged on the first medium substrate 100, a sum network feeding microstrip 2 connected with the network feeding port 1 and a sum network microstrip feeding coupling gap 3 arranged on a first metal layer 200, and the energy of the sum network is fed into a SIW collinear gap unit through the sum network microstrip feeding coupling gap 3, and is similar to the H-T structure of a magic T because the sum network microstrip feeding coupling gap 3 is parallel to the H surface of an antenna, and the energy fed into the left side and the right side of the second medium substrate 300 is in equal amplitude and same phase at the moment, and because the two sides of a radiation waveguide in the second medium substrate 300 are in mirror symmetry about xoz surfaces, so that the sum beam is finally obtained. Referring to fig. 5, the differential network feeding structure for implementing the differential network feeding includes a differential network feeding interface 5 disposed on a third dielectric substrate 500, a differential network feeding microstrip 6 connected to the differential network feeding interface 5, and a differential network microstrip feeding coupling slot 7 disposed on the second metal layer 400, wherein energy in the differential network feeding interface 5 is fed into the second dielectric substrate 300 through the differential network microstrip feeding coupling slot 7 and radiated through the radiation slot 4. Because the microstrip feed coupling slot 7 of the difference network is parallel to the E plane of the antenna, and is similar to the E-T structure of the magic T, the energy fed into the left and right sides of the second dielectric substrate 300 is of equal amplitude but 180 DEG phase difference, so that the energy radiated by the radiation slot radiation 4 is inverted to obtain a difference beam. The single pulse feed structure designed in this way not only does not need a phase shifter, but also reduces the surface area, is not oversized like the three-dimensional structure of the traditional waveguide, greatly reduces the volume of the antenna, is easier to process, and is easy to integrate in a radar or a satellite.
In some embodiments of the invention, the sum network microstrip feed coupling gap 3 and the difference network microstrip feed coupling gap 7 in the structure adopt butterfly shapes, the same matching effect as that of a common gap is realized by a smaller length through the butterfly-shaped gap, and meanwhile, the bandwidth of the resonance point expansion can be increased.
In some embodiments of the present invention, both the first dielectric substrate 100 and the third dielectric substrate 500 use Rogers RO4003 (tm), the thickness of the substrate is 0.508mm, the dielectric constant is 3.55, and the loss tangent is 0.0027.
In some of the embodiments of the present invention, referring to fig. 6-11, the simulated performance of an antenna is presented, where port 1 represents a bad network feed port, and port 2 represents and network feed port. As can be seen in fig. 6, the antenna operates in the X frequency band, with a difference network operating band of 9.63-10.38GHz and a network band of 9.45-10.02GHz; FIG. 7 shows the isolation between the feed ports of the sum and difference network, the isolation between the two ports is below-38 dB, the isolation is good, the mutual leakage of signals between the ports of the antenna is small, the mutual influence between the two ports of the antenna is avoided to a great extent, and the positioning of the target can be better realized; 8-9 are antenna and differential network beam direction gain diagrams, wherein the maximum gain of the neutral network reaches 14.2dBi, the side lobe is lower than-13 dBi, the maximum gain of the differential network is 9.6dBi, the zero depth is-14.7 dBi, the side lobe is lower than-9.3 dBi, and the side lobes of the differential beam are very low and have higher gain, so that the monopulse antenna has stronger electromagnetic interference resistance and better sensitivity, and can be well applied to target orientation of military radars; the transformation of the directional diagram and the differential beam is realized by controlling the transformation of the feed port, and the directional diagram can meet the basic requirement of the monopulse antenna; fig. 10 is a gain pattern of the sum network antenna at a plurality of frequency points, and the figure shows that the sum beam gain of the antenna is higher at 9.9GHz and 10GHz, the side lobe is low, the requirement of a single-pulse antenna is basically met, the gain starts to decrease at 9.8GHz, and the side lobe rises; fig. 11 shows gain patterns of the difference network antenna on a plurality of frequency points, and shows that the antenna has symmetrical beams on three frequency points, the zero depth is above-11.9 dBi, and the sum and difference beams of the three frequency points are symmetrical, so that a single pulse function can be realized in practical application, and the requirements are met.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The single-pulse substrate integrated waveguide collinear slot array antenna is characterized in that a first dielectric substrate (100), a first metal layer (200), a second dielectric substrate (300), a second metal layer (400) and a third dielectric substrate (500) are sequentially arranged from top to bottom,
the first dielectric substrate (100) is provided with a network feed structure, the network feed structure comprises a network feed port (1), a network feed microstrip (2) and a network microstrip feed coupling gap (3) which are arranged on the first dielectric substrate (100), and the network microstrip feed coupling gap (3) is parallel to the H surface of the antenna;
a substrate integrated collinear slit unit is arranged on the first metal layer (200), the substrate integrated collinear slit unit comprises at least one row of radiation slits (4), and each row of radiation slits (4) comprises a plurality of collinear radiation slits;
the second dielectric substrate (300) is provided with waveguide walls at positions corresponding to the radiation slots (4), and radiation waveguides in the second dielectric substrate (300) are in mirror symmetry about a xoz plane;
the third dielectric substrate (500) is provided with a differential network feed structure, the differential network feed structure comprises a differential network feed interface (5) arranged on the third dielectric substrate (500), a differential network feed microstrip (6) connected with the differential network feed interface (5) and a differential network microstrip feed coupling gap (7) arranged on the second metal layer (400), and the differential network microstrip feed coupling gap (7) is parallel to the E surface of the antenna.
In the substrate integrated collinear slot unit, the distance between the waveguide wall and the central line of the waveguide, which are correspondingly arranged in each radiation slot (4), is adjustable;
the coupling gap (3) for feeding with the network microstrip is a butterfly-shaped gap;
the differential network microstrip feed coupling gap (7) is a butterfly gap.
2. The single-pulse substrate integrated waveguide collinear slot array antenna according to claim 1, characterized in that the sum network feed microstrip (2) and the difference network feed microstrip (6) are both metal layers.
3. The single pulse substrate integrated waveguide co-linear slot array antenna of claim 1, wherein the first dielectric substrate (100), the second dielectric substrate (300) and the third dielectric substrate (500) are all Rogers RO4003.
4. The single pulse substrate integrated waveguide co-linear slot array antenna of claim 1, wherein the dielectric constants of the first dielectric substrate (100), the second dielectric substrate (300) and the third dielectric substrate (500) are 3.55.
5. The single pulse substrate integrated waveguide co-linear slot array antenna according to claim 1, characterized in that the antenna comprises two rows of radiating slots (4).
6. The single pulse substrate integrated waveguide co-linear slot array antenna of claim 5, wherein each row of radiating slots (4) comprises 4 co-linear radiating slots.
7. The single pulse substrate integrated waveguide co-linear slot array antenna of any of claims 1-6, wherein the antenna is capable of operating in the X-band 9-10.5GHz.
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| CN110504546A (en) * | 2019-07-18 | 2019-11-26 | 南京航空航天大学 | A kind of higher mode monopulse antenna based on substrate integration wave-guide |
| CN114006172A (en) * | 2021-10-19 | 2022-02-01 | 南京航空航天大学 | Dual-polarized single pulse antenna based on substrate integrated waveguide and strip line feed |
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| CN110504546A (en) * | 2019-07-18 | 2019-11-26 | 南京航空航天大学 | A kind of higher mode monopulse antenna based on substrate integration wave-guide |
| CN114006172A (en) * | 2021-10-19 | 2022-02-01 | 南京航空航天大学 | Dual-polarized single pulse antenna based on substrate integrated waveguide and strip line feed |
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