CN112490657B - Dual-beam broadband filter antenna with absorptive radiation zero point - Google Patents
Dual-beam broadband filter antenna with absorptive radiation zero point Download PDFInfo
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- CN112490657B CN112490657B CN202011427474.6A CN202011427474A CN112490657B CN 112490657 B CN112490657 B CN 112490657B CN 202011427474 A CN202011427474 A CN 202011427474A CN 112490657 B CN112490657 B CN 112490657B
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- 230000005855 radiation Effects 0.000 title claims abstract description 127
- 239000002184 metal Substances 0.000 claims abstract description 172
- 239000000758 substrate Substances 0.000 claims description 43
- 239000000523 sample Substances 0.000 claims description 7
- 230000001788 irregular Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
The application discloses a dual-beam broadband filter antenna with an absorptive radiation zero point.A LC resonant circuit is formed between two pairs of short-circuit metal patches, a radiation patch and a system floor, and the radiation energy of the upper edge frequency and the lower edge frequency of the working bandwidth can be stored in the arranged LC resonant circuit, so that the radiation energy on the edge frequency of the working bandwidth of the filter antenna is greatly restrained from radiating and being reflected back to a feed port of the filter antenna, the absorptive radiation zero points of the upper edge and the lower edge of the working bandwidth are generated, good filter frequency selection characteristics are obtained, and meanwhile, the stability of the performance of radio-frequency equipment connected to the rear end of the antenna is avoided from being damaged. Through the short-circuit connection of the two T-shaped metal strips and the radiation patch, the current distribution on the radiation patch can be changed, so that the current distribution on the resonance frequency points in the two strips tends to be consistent, and stable dual-beam radiation characteristics can be realized in a wider working frequency band.
Description
Technical Field
The application relates to the technical field of communication antennas, in particular to a dual-beam broadband filter antenna with an absorptive radiation zero point.
Background
In a wireless communication system, the antenna and the band-pass filter are two key components, which determine the performance of the two key components, and influence the communication capability of the whole wireless communication system.
Nowadays, with the development of diversity and personality characteristics of wireless communication devices, particularly in terms of convenience performance, the trend of antennas and filters has been promoted to be more compact and integrated. Therefore, the antenna and the filter are integrated to be designed into the filter antenna, so that a matching circuit part in the traditional design is omitted, the system size is reduced, and meanwhile, the filter antenna also has the antenna radiation characteristic and the high out-of-band rejection capability of the passband filter, and the performance of the wireless communication system is improved as a whole. On the other hand, the dual-beam antenna has the advantages of larger radiation coverage area and relatively concentrated energy, and is particularly suitable for being applied to application places needing large signal coverage area, improving the stability and transmission rate of data and reducing energy loss. But the bandwidth of the existing dual-beam antenna is relatively narrow and needs to be further widened.
Currently, there are two filter antenna design methods. The first design method is an integrated design method, that is, focusing on the design of a band-pass filter, an antenna radiating unit is used for replacing a resonant unit of the last stage of the filter, but a larger insertion loss exists, and the size of the filter antenna is larger. The second method is a fusion design method, namely focusing on the design of the antenna, and no additional filter circuit is needed, so that insertion loss can be avoided, and the realization of small size of the antenna is facilitated, and the defects brought by the comprehensive design method can be overcome. Meanwhile, most of the antennas based on the fusion design method reflect most of energy waves back to the signal input port by matching the out-of-band impedance of the antennas with sharp mismatch, so that out-of-band radiation is effectively inhibited, the radiation zero point of the emissivity is realized, and the filtering performance of the filtering antenna is realized. However, the filter antenna based on the fusion design method cannot realize the non-reflection or low-reflection-energy absorption filtering performance without introducing an additional filter or an out-band energy consumption resistor, so that the out-band reflection wave can reduce the stability of radio frequency equipment (such as a receiver/transmitter and the like) connected to the rear end of the antenna, and the system performance is damaged.
The Chinese patent No. 201810534584.9 discloses a dual-frequency patch antenna with omnidirectional radiation, the disclosed microstrip patch antenna has the characteristics of omnidirectional radiation and dual frequency, and has wider frequency band, low profile and simple structure, but the microstrip patch antenna is reflective filtering, which can influence the stability of the performance of radio frequency equipment connected to the rear end of the antenna and damage the system performance.
The Chinese patent of patent number ZL201720613757.7 discloses a novel double-beam directional radiation MIMO patch antenna and a terminal thereof, which discloses a double-beam patch antenna with good broadband working bandwidth and filtering performance realized by utilizing metal strips and patch gaps, and meanwhile, the double-beam patch antenna forms a four-unit MIMO patch antenna. However, the dual-beam patch antenna is reflective filtering, which also affects the stability of the performance of the rf device connected to the back end of the antenna, and damages the system performance.
Disclosure of Invention
The application provides a dual-beam broadband filter antenna with an absorptive radiation zero point, which is used for solving the technical problems that the existing filter antenna affects the stability of the performance of radio frequency equipment connected to the rear end of the antenna, has higher energy loss and has narrower working bandwidth.
In view of this, the present application provides a dual-beam broadband filter antenna having an absorptive radiation null, comprising: the system comprises a first substrate, a second substrate, a system floor, a radiation patch, a first short-circuit metal patch, a second short-circuit metal patch, a third short-circuit metal patch, a fourth short-circuit metal patch, a first T-shaped metal strip and a second T-shaped metal strip;
the system floor is printed on the bottom surface of the first substrate, and the second substrate is arranged on the top surface of the first substrate;
the radiation patch is printed on the top surface of the second substrate and is provided with a feed probe;
The first short-circuit metal patch and the second short-circuit metal patch are symmetrically printed on the top surface of the second substrate by the first central axis of the second substrate, the third short-circuit metal patch and the fourth short-circuit metal patch are symmetrically printed on the top surface of the second substrate by the first central axis of the second substrate, the first short-circuit metal patch, the second short-circuit metal patch, the third short-circuit metal patch and the fourth short-circuit metal patch are all coupled with the radiation patch, the sizes of the third short-circuit metal patch and the fourth short-circuit metal patch are smaller than the sizes of the first short-circuit metal patch and the second short-circuit metal patch, and the first short-circuit metal patch, the second short-circuit metal patch, the third short-circuit metal patch and the fourth short-circuit metal patch are all in short-circuit connection with the system floor by a first metal pin;
the first T-shaped metal belt and the second T-shaped metal belt are symmetrically printed on the top surface of the second substrate through a second central axis of the second substrate, and the first T-shaped metal belt and the second T-shaped metal belt are in short circuit connection with the radiation patch through second metal pins.
Preferably, the radiation patch part is printed on a central area of the bottom surface of the second substrate.
Preferably, the radiation patch comprises a first radiation patch, a second radiation patch and a third radiation patch, the first radiation patch and the second radiation patch are arranged at intervals to form a spacing area, the first radiation patch and the second radiation patch are connected through the third radiation patch to form an I-shaped structure, and the first short-circuit metal patch, the second short-circuit metal patch, the third short-circuit metal patch and the fourth short-circuit metal patch are all arranged in the spacing area.
Preferably, the first short-circuit metal patch and the second short-circuit metal patch are disposed close to the first central axis of the second substrate with respect to the third short-circuit metal patch and the fourth short-circuit metal patch.
Preferably, the feeding probe is arranged at the center of the radiation patch.
Preferably, the first T-shaped metal strip and the second T-shaped metal strip are both arranged below the radiation patch.
Preferably, the first metal pins are specifically four.
Preferably, the second metal pins are two in particular.
Preferably, the first central axis and the second central axis are disposed orthogonal to each other.
Preferably, the shapes of the radiation patch, the first short-circuit metal patch, the second short-circuit metal patch, the third short-circuit metal patch and the fourth short-circuit metal patch are specifically circular, rectangular, prismatic or irregular shapes.
From the above technical solutions, the embodiment of the present application has the following advantages:
According to the dual-beam broadband filter antenna with the absorption radiation zero point, an LC resonant circuit is formed between the two pairs of short-circuit metal patches, the radiation patches and the system floor, radiation energy of upper edge frequency and lower edge frequency of the working bandwidth can be stored in the LC resonant circuit, radiation energy on the edge frequency of the working bandwidth of the filter antenna is greatly restrained from radiating and being reflected back to a feed port of the filter antenna, absorption radiation zero points of the upper edge and the lower edge of the working bandwidth are generated, the filter antenna has good band edge rolling rate, good filter frequency selection characteristics are obtained, and meanwhile stability of radio frequency equipment performance connected to the rear end of the antenna is avoided from being damaged. Through the short circuit connection of the two T-shaped metal strips and the radiation patch, the current distribution on the radiation patch can be changed, so that the current distribution on the resonance frequency points in the two strips tends to be consistent, thereby being beneficial to realizing stable dual-beam radiation characteristics in a wider working frequency band.
Drawings
Fig. 1 is a schematic perspective view of a dual-beam broadband filter antenna with an absorptive radiation null according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a side view of a dual-beam broadband filter antenna with absorptive radiation nulls according to an embodiment of the present application;
FIG. 3 is a schematic top view of a dual-beam broadband filter antenna with absorptive radiation nulls according to an embodiment of the present application;
FIG. 4 is an electromagnetic simulation graph of the frequency response with the gain and reflection coefficient S 11 of a dual-beam broadband filter antenna with an absorptive radiation null according to an embodiment of the present application;
FIG. 5 is an electromagnetic simulation graph of the radiation efficiency versus frequency response of a dual-beam broadband filter antenna with an absorptive radiation null according to an embodiment of the present application;
Fig. 6 is a two-dimensional radiation pattern of a dual-beam broadband filter antenna with an absorptive radiation null at two radiation resonance point frequencies according to an embodiment of the present application.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
For ease of understanding, referring to fig. 1 to 3, the present application provides a dual-beam broadband filter antenna with an absorptive radiation null, comprising: a first substrate 10, a second substrate 20, a system floor 11, a radiation patch 21, a first shorting metal patch 31, a second shorting metal patch 32, a third shorting metal patch 41, a fourth shorting metal patch 42, a first T-shaped metal strip 51, a second T-shaped metal strip 52;
The system floor 11 is printed on the bottom surface of the first substrate 10, and the second substrate 20 is arranged on the top surface of the first substrate 10;
It will be appreciated that the bottom surface and the top surface of the first substrate 10 are disposed opposite to each other.
The radiation patch 21 is printed on the top surface of the second substrate 20, and the radiation patch 21 is provided with a feed probe 22;
The first short-circuit metal patch 31 and the second short-circuit metal patch 32 are symmetrically printed on the top surface of the second substrate 20 with the first central axis of the second substrate 20, the third short-circuit metal patch 41 and the fourth short-circuit metal patch 42 are symmetrically printed on the top surface of the second substrate 20 with the first central axis of the second substrate 20, the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41 and the fourth short-circuit metal patch 42 are all coupled with the radiation patch 21, the sizes of the third short-circuit metal patch 41 and the fourth short-circuit metal patch 42 are smaller than the sizes of the first short-circuit metal patch 31 and the second short-circuit metal patch 32, and the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41 and the fourth short-circuit metal patch 42 are all in short-circuit connection with the system floor 11 through the first metal pins 61, 62, 63 and 64;
The number of the first metal pins 61, 62, 63, 64 is specifically four, that is, the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41, and the fourth short-circuit metal patch 42 are respectively connected to the system floor 11 by short-circuit through the corresponding first metal pins.
Meanwhile, the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41, and the fourth short-circuit metal patch 42 are all disposed so as not to overlap the radiation patch 21.
The first T-shaped metal strip 51 and the second T-shaped metal strip 52 are symmetrically printed on the bottom surface of the second substrate 20 with the second central axis of the second substrate 20, and the first T-shaped metal strip 51 and the second T-shaped metal strip 52 are short-circuited with the radiation patch 21 through the second metal pins 71 and 72.
The second metal pins 71 and 72 are specifically two, that is, the first T-shaped metal strip 51 and the second T-shaped metal strip 52 are respectively connected to the radiation patch 21 in a short circuit manner by the corresponding second metal pins.
In addition, in one example, the first central axis and the second central axis are disposed orthogonal to each other.
Further, the radiation patch 21 is partially printed on a central region of the top surface of the second substrate 20.
Further, the radiating patch 21 includes a first radiating patch 211, a second radiating patch 212, and a third radiating patch 213, the first radiating patch 211 and the second radiating patch 212 are disposed at intervals to form an interval region, the first radiating patch 211 and the second radiating patch 212 are connected through the third radiating patch 213 to form an "i" shape structure, and the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41, and the fourth short-circuit metal patch 42 are disposed in the interval region.
The first radiation patch 211 and the second radiation patch 212 are integrally formed after being connected by the third radiation patch 213.
Further, the first shorting metal patch 31 and the second shorting metal patch 32 are disposed close to the first central axis of the second substrate 20 with respect to the third shorting metal patch 41 and the fourth shorting metal patch 42.
Further, a feeding probe 22 is provided at the center of the radiation patch 21.
Further, a first T-shaped metal strip 51 and a second T-shaped metal strip 52 are provided below the radiation patch 21.
Further, the shapes of the radiation patch 21, the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41, and the fourth short-circuit metal patch 42 are specifically circular, rectangular, prismatic, or irregular shapes.
It should be noted that, the working principle of this embodiment is as follows:
After the feeding probe 22 receives the circuit feeding signal, it can directly transmit to the radiation patch 21 to generate radiation energy, when the upper and lower working frequency bands are edges, the radiation patch 21 is respectively coupled with the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41 and the fourth short-circuit metal patch 42, so that the energy can be respectively coupled from the radiation patch 21 to the short-circuit metal patches, and the first short-circuit metal patch 31, the second short-circuit metal patch 32, the third short-circuit metal patch 41 and the fourth short-circuit metal patch 42 are all in short-circuit connection with the system floor 11 through the first metal pin, thus forming an LC resonant circuit, the energy can be respectively stored into parasitic inductance and capacitance generated by the four short-circuit metal patches, so that the energy can not be effectively radiated out, the reflection energy of the incident port is also suppressed, and the absorption radiation zero point of the lower working frequency band edge can be generated due to the relatively large size of the first short-circuit metal patch 31 and the second short-circuit metal patch 32; the third short-circuit metal patch 41 and the fourth short-circuit metal patch 42 have relatively small dimensions, so that an absorptive radiation zero point at the edge of the upper operating band can be generated, so that the filter antenna obtains a good band-edge roll-off rate, and the filter capability of the filter antenna and the stability of the performance of the radio frequency device connected to the rear end of the antenna are improved.
Meanwhile, in the operating frequency band, by introducing a pair of T-shaped metal strips below the radiating patch 21, the pair of T-shaped metal strips are in short-circuit connection with the radiating patch 21, the current distribution on the radiating patch 21 can be changed, so that the current distribution on the resonance frequency points in the two strips tends to be consistent, thereby being beneficial to realizing stable dual-beam radiation characteristics in a wide-frequency operating frequency band.
And because a pair of T-shaped metal strips are introduced below the radiation patch 21, the out-of-band impedance matching of the filter antenna is rapidly deteriorated due to the capacitance formed between the T-shaped metal strips and the radiation patch, out-of-band energy is reflected back to the electric port, four out-of-band reflection type radiation zero points are generated, out-of-band interference radiation is effectively restrained, so that the filter antenna has good out-of-band radiation inhibition, and good filter characteristics are obtained.
For convenience of understanding, please refer to the electromagnetic simulation graphs of fig. 4 to 6.
Fig. 4 is an electromagnetic simulation curve of the frequency response of the reflection coefficient S 11 of the filter antenna in the present embodiment, and an electromagnetic simulation curve of the gain of the antenna in two directions (phi=90°, theta=40°) and (phi=90°, theta= -40 °) according to the frequency response. As shown in fig. 4, in the operating band, the gain of the filter antenna in both directions (phi=0°, theta=40°) and (phi=0°, theta= -40 °), respectively, was maintained at substantially 7dBi, and the filter antenna gain was very stable, which demonstrated that stable dual-beam radiation characteristics were achieved in the filter antenna band.
Meanwhile, the gain of the filter antenna drops sharply at the edges of the upper and lower working frequency bands to form two radiation zero points, which proves that most of radiation energy is not radiated, and a good band edge roll-off rate is obtained, so that the frequency selectivity of the filter antenna is improved, and the filter antenna has good filtering capability.
In addition, as shown in fig. 4, the reflection coefficient S 11 corresponding to the frequencies of the two radiation nulls formed by the upper and lower operating band edges is kept smaller than-10 dB, which proves that most of the antenna energy is not reflected back to the input port. Thus, it can be explained that an absorptive radiation null is generated at the filter antenna, and that the reflected wave can be suppressed from damaging the performance of the radio frequency device (e.g., receiver/transmitter, etc.) that is docked at the rear end of the antenna. Meanwhile, a pair of T-shaped metal strips are introduced between the radiation patch 21 and the system floor 11, and on the premise that the out-of-band reflection coefficient S 11 tends to be 0dB, two reflection type radiation zero points formed by the upper stop band and the lower stop band can effectively inhibit out-of-band radiation, so that good filtering performance is obtained.
Fig. 5 is an electromagnetic simulation curve of the response of the radiation efficiency of the filter antenna with frequency in the present embodiment. As shown in fig. 5, the radiation efficiency of the filter antenna drops sharply around the upper and lower cut-off frequencies of the filter antenna operating band, demonstrating that the filter antenna in this embodiment achieves good out-of-band radiation suppression in the 360 ° omnidirectional range, not only in the two directions (phi=0°, theta=40°) and (phi=0°, theta= -40 °).
Fig. 6 is a two-dimensional radiation pattern of the filter antenna in the present embodiment at two radiation resonance point frequencies. As shown in fig. 6, the filter antenna has good dual-beam radiation performance at two in-band resonance frequency points, and the cross polarization of the filter antenna is less than 35dBi, and the cross polarization ratio is good. It can be explained that the pair of T-shaped metal strips introduced between the radiating patch 21 and the system floor 11 can effectively change the current distribution so that the current distribution at the two in-band resonance frequency points tends to be uniform, similar to the pure TM02 mode current distribution, thereby facilitating realization of stable dual-beam radiation characteristics in a wide frequency operating band.
Compared with the traditional filter antenna, the invention provides the dual-beam broadband filter antenna with the absorption radiation zero point, an LC resonant circuit is formed between the two pairs of short-circuit metal patches, the radiation patches and the system floor, and the radiation energy of the upper edge frequency and the lower edge frequency of the working bandwidth can be stored in the LC resonant circuit, so that the radiation energy on the edge frequency of the working bandwidth of the filter antenna is greatly restrained from radiation and is restrained from being reflected back to the feed port of the filter antenna, the absorption radiation zero points of the upper edge and the lower edge of the working bandwidth are generated, the filter antenna has good band edge rolling rate, good filter frequency selection characteristics are obtained, and meanwhile, the stability of the performance of radio frequency equipment connected to the rear end of the antenna is avoided from being damaged. Through the short circuit connection of the two T-shaped metal strips and the radiation patch, the current distribution on the radiation patch can be changed, so that the current distribution on the resonance frequency points in the two strips tends to be consistent, thereby being beneficial to realizing stable dual-beam radiation characteristics in a wider working frequency band.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. A dual-beam broadband filter antenna having an absorptive radiation null, comprising: the system comprises a first substrate, a second substrate, a system floor, a radiation patch, a first short-circuit metal patch, a second short-circuit metal patch, a third short-circuit metal patch, a fourth short-circuit metal patch, a first T-shaped metal strip and a second T-shaped metal strip;
the system floor is printed on the bottom surface of the first substrate, and the second substrate is arranged on the top surface of the first substrate;
the radiation patch is printed on the top surface of the second substrate and is provided with a feed probe;
The radiation patch part is printed in the central area of the top surface of the second substrate;
The first short-circuit metal patch and the second short-circuit metal patch are symmetrically printed on the top surface of the second substrate by the first central axis of the second substrate, the third short-circuit metal patch and the fourth short-circuit metal patch are symmetrically printed on the top surface of the second substrate by the first central axis of the second substrate, the first short-circuit metal patch, the second short-circuit metal patch, the third short-circuit metal patch and the fourth short-circuit metal patch are all coupled with the radiation patch, the sizes of the third short-circuit metal patch and the fourth short-circuit metal patch are smaller than the sizes of the first short-circuit metal patch and the second short-circuit metal patch, and the first short-circuit metal patch, the second short-circuit metal patch, the third short-circuit metal patch and the fourth short-circuit metal patch are all in short-circuit connection with the system floor by a first metal pin;
the first T-shaped metal belt and the second T-shaped metal belt are symmetrically printed on the bottom surface of the second substrate through a second central axis of the second substrate, and the first T-shaped metal belt and the second T-shaped metal belt are in short circuit connection with the radiation patch through second metal pins;
The radiation patch comprises a first radiation patch, a second radiation patch and a third radiation patch, wherein the first radiation patch and the second radiation patch are arranged at intervals to form an interval area, the first radiation patch and the second radiation patch are connected through the third radiation patch to form an I-shaped structure, and the first short circuit metal patch, the second short circuit metal patch, the third short circuit metal patch and the fourth short circuit metal patch are all arranged in the interval area.
2. The dual-beam broadband filter antenna with absorptive radiation nulls of claim 1, wherein the first shorting metal patch and the second shorting metal patch are each disposed proximate a first central axis of the second substrate relative to the third shorting metal patch and the fourth shorting metal patch.
3. The dual-beam broadband filter antenna with absorptive radiation nulls of claim 1, wherein the feed probe is located at the center of the radiating patch.
4. The dual-beam broadband filter antenna with absorptive radiation nulls of claim 1, wherein the first T-shaped metal strip and the second T-shaped metal strip are both disposed below the radiating patch.
5. The dual-beam broadband filter antenna with absorptive radiation nulls of claim 1, wherein the first metal pins are in particular four.
6. The dual-beam broadband filter antenna with absorptive radiation nulls of claim 1, wherein the second metal pins are in particular two.
7. The dual-beam broadband filter antenna with absorptive radiation nulls of claim 1, wherein the first central axis and the second central axis are disposed mutually orthogonal.
8. The dual-beam broadband filter antenna with absorptive radiation nulls of claim 1, wherein the shape of the radiating patch, the first shorting metal patch, the second shorting metal patch, the third shorting metal patch, and the fourth shorting metal patch is specifically circular, rectangular, or irregular.
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| CN112563724A (en) * | 2020-12-04 | 2021-03-26 | 西安电子科技大学 | Low-profile half-mode substrate integrated waveguide filter antenna with high frequency selectivity |
| CN112968281B (en) * | 2021-05-18 | 2021-09-24 | 华南理工大学 | Dual-polarized filtering antenna unit and dual-polarized filtering antenna array |
| CN113497351B (en) * | 2021-09-07 | 2022-01-11 | 华南理工大学 | Filtering antenna and wireless communication equipment |
| CN116759801B (en) * | 2023-08-21 | 2023-11-07 | 南通至晟微电子技术有限公司 | Dual-beam filter patch antenna |
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| CN214176235U (en) * | 2020-12-09 | 2021-09-10 | 广东工业大学 | Dual-beam broadband filtering antenna with absorptive radiation zero point |
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