CN111883914A - Dielectric resonator broadband antenna with filter characteristic based on SIW feeding - Google Patents

Dielectric resonator broadband antenna with filter characteristic based on SIW feeding Download PDF

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Publication number
CN111883914A
CN111883914A CN202010667116.6A CN202010667116A CN111883914A CN 111883914 A CN111883914 A CN 111883914A CN 202010667116 A CN202010667116 A CN 202010667116A CN 111883914 A CN111883914 A CN 111883914A
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siw
dielectric resonator
resonator
dielectric
antenna
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CN111883914B (en
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徐文娇
朱佳敏
李贺
王建朋
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/10—Dielectric resonators
    • H01P7/105—Multimode resonators
    • 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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Abstract

The invention discloses a dielectric resonator broadband antenna with filtering characteristics based on SIW feed, which comprises a dielectric resonator, a ground plate and a substrate, wherein the dielectric resonator, the ground plate and the substrate are sequentially arranged from top to bottom; the dielectric resonator comprises two layers of overlapped dielectric resonators, and the dielectric constants of the two layers of dielectric resonators are different. The antenna has wide bandwidth, and the frequency position of a transmission zero point can be flexibly controlled through the plurality of parallel coupling grooves to form good filtering characteristics. In addition, the dielectric resonator is used as the radiation structure of the antenna, and has no conductor and surface wave loss, and the loss is very small, so that the dielectric resonator has very high radiation efficiency, and can obtain higher antenna gain.

Description

Dielectric resonator broadband antenna with filter characteristic based on SIW feeding
Technical Field
The invention relates to the technical field of antennas, in particular to a dielectric resonator broadband antenna with a filter characteristic based on SIW feeding.
Background
Modern communication puts forward higher and higher requirements on the performances of antenna miniaturization, low loss and the like, the metal loss of the traditional microstrip antenna is higher in a millimeter wave frequency band, the dielectric resonance antenna is an antenna which is formed in the last decade, a radiation unit is formed by dielectric materials, and the loss of the radiation unit is very low due to the fact that no conductor and surface wave loss exist, so that the radiation efficiency is very high.
The filtering antenna simultaneously plays the filtering function of the filter and the radiation function of the antenna, so that the radio frequency front-end circuit is further miniaturized, and the packaging integration is facilitated. The SIW has the advantages of low loss, high Q value, easy integration, etc.
In recent years, the reported Dielectric Resonator antenna with the Filtering characteristic Based on SIW feed has the defects of less research, narrower bandwidth, poorer Filtering characteristic, uneven gain and the like, for example, a Dielectric Resonator antenna with the SIW feed is proposed in the literature of "Implementation of synthetic material in Dielectric Resonator-Based Filtering Antennas", better impedance matching is realized through a certain number of air holes in the Dielectric Resonator, the processing difficulty is high, the bandwidth of 15.5% is finally realized, an additional transmission zero is introduced by a pair of quarter-wavelength short-circuit lines, and the Filtering characteristic of the antenna is poorer. The document "multiple Applications of Substrate Integrated waveguided information in Dielectric resonators and configurable Circuits" proposes a Reconfigurable filter and Dielectric Resonator antenna using a probe-fed SIW, which are Integrated in a multifunctional manner, but the transmission zero point of the antenna cannot be adjusted independently and the gain is not flat, and the filtering characteristics are poor.
Disclosure of Invention
The invention aims to provide a dielectric resonator broadband antenna with filter characteristics based on SIW feeding, and aims to solve the problem that the conventional dielectric resonator antenna with filter characteristics based on SIW feeding cannot have broadband and good filter characteristics.
The technical solution for realizing the purpose of the invention is as follows: the dielectric resonator broadband antenna comprises a dielectric resonator, a ground plate and a substrate, wherein the dielectric resonator, the ground plate and the substrate are sequentially arranged from top to bottom; the dielectric resonator comprises two layers of overlapped dielectric resonators, and the dielectric constants of the two layers of dielectric resonators are different.
Furthermore, the SIW resonant cavity comprises a metalized through hole arranged in the substrate to form a SIW main body resonant cavity, and a first resonant cavity and a second resonant cavity which are symmetrically distributed about the resonant cavity and are respectively coupled with the resonant cavity; the microstrip antenna further comprises a microstrip feeder line and a metal layer, wherein the microstrip feeder line is arranged on the lower side of the substrate and embedded in the metal layer.
Furthermore, the number of the through holes on each side and the distance between the through holes on the two sides of the metalized through holes at the coupling windows on the two sides of the SIW main body resonant cavity are adjustable, so that the TE of the SIW main body resonant cavity is enabled to be adjustable20The resonant frequency of the mode is operated in the passband frequency range while the TE of the SIW body resonator is maintained10Resonant frequency of mode to TE20The resonant frequencies of the modes are close, adding an in-band resonant mode.
Furthermore, a group of parallel rectangular grooves is arranged on the grounding plate and above the microstrip feeder line, the group of parallel rectangular grooves comprises a first rectangular groove arranged in the middle position and n pairs of second rectangular grooves symmetrically arranged on two sides of the first rectangular groove, and the length of the second rectangular grooves is greater than that of the first rectangular groove.
Further, the length of the second rectangular groove is adjustable, and the second rectangular groove is used for changing the zero point position.
Compared with the prior art, the invention has the following remarkable advantages: 1) according to the technical scheme, the metallized through holes on the left side and the right side in the SIW resonant cavity are adjusted, so that the TE10 mode frequency of the main resonant cavity is increased to be close to the resonant frequency of the TE20 mode, and an in-band resonant mode is added, so that a wider bandwidth is obtained; on the basis, the two layers of overlapped dielectric resonators with different three-dimensional sizes and dielectric constants also expand the bandwidth of the antenna, so that the bandwidth of the antenna is wide enough; 2) the lengths of the longer rectangular grooves symmetrically distributed on two sides of the plurality of parallel coupling grooves influence the position of a transmission zero point, and the longer the length is, the zero point position moves to a low-frequency position, so that the frequency position of the transmission zero point can be flexibly controlled to form good filtering characteristics; 3) the dielectric resonator is used as the radiation structure of the antenna, and has no conductor and surface wave loss, and the loss is small, so that the antenna has high radiation efficiency and can obtain high antenna gain.
The present invention is described in further detail below with reference to the attached drawing figures.
Drawings
Fig. 1 is a schematic perspective view of a dielectric resonator broadband antenna with a filter characteristic based on SIW feeding in one embodiment.
FIG. 2 is a top view of the structure dimensions of the SIW cavity, microstrip feed and metal layer of the substrate in one embodiment.
Fig. 3 is a top view of the structural dimensions of a single rectangular slot and five parallel rectangular slots in the center of a ground plate in one embodiment.
FIG. 4 is a schematic representation of the dimensions of a three-dimensional structure of two layers of superimposed rectangular parallelepiped media according to one embodiment.
FIG. 5 shows the reflection coefficient S in one embodiment11And (5) parameter simulation graphs.
Fig. 6 is a simulation diagram of the Gain parameter in one embodiment.
Fig. 7 shows the radiation patterns of the antenna at 0 ° and 90 ° in one embodiment at 8.84GHz, as shown in fig. (a) and (b), respectively.
Fig. 8 shows the radiation patterns of the antenna at 0 ° and 90 ° in one embodiment at 9.77GHz, as shown in fig. (a) and (b), respectively.
Fig. 9 shows the radiation patterns of the antenna at 0 ° and 90 ° in 10.7GHz in one embodiment, as shown in fig. (a) and (b), respectively.
FIG. 10 is a graph of simulation of Gain parameters for transmission zeroes as a function of the length of the rectangular slot, in accordance with an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, with reference to fig. 1, a SIW feed-based dielectric resonator broadband antenna with a filtering characteristic is provided, where the antenna includes a dielectric resonator, a ground plate 6 and a substrate 3, which are sequentially arranged from top to bottom, the dielectric resonator is used as a radiation module of the antenna, a SIW resonant cavity is arranged on the substrate 3, a rectangular slot 7 is arranged above the resonant cavity and on the ground plate 6, and the SIW resonant cavity is coupled with the dielectric resonator through the slot; the dielectric resonator comprises two layers of overlapped dielectric resonators, and the dielectric constants of the two layers of dielectric resonators are different.
Further, in one embodiment, the SIW resonant cavity includes a metalized through hole disposed in the substrate 3, forming a SIW main resonant cavity 12, and a first resonant cavity 4-1 and a second resonant cavity 4-2 symmetrically distributed about the resonant cavity and respectively coupled to the resonant cavities; the microstrip antenna further comprises a microstrip feed line 1 and a metal layer 13, wherein the microstrip feed line 1 is arranged on the lower side of the substrate 3, and the metal layer 13 is embedded in the microstrip feed line 1.
Here, the two-sided resonators serve to make the gain of the passband flatter, but at the same time, a sharp poorly matched resonant mode is introduced and the gain is reduced here, so that in order not to affect the passband performance, the two-sided SIW resonators are required to have resonant frequencies far from the passband.
Further, in one embodiment, the number of the through holes on each side and the distance between the through holes on both sides of the metalized through holes 5 at the coupling windows on both sides of the SIW main body resonant cavity are adjustable, so that the TE of the SIW main body resonant cavity is adjusted20The resonant frequency of the mode is operated in the passband frequency range while the TE of the SIW body resonator is maintained10Resonant frequency of mode to TE20The resonant frequencies of the modes are close, adding an in-band resonant mode.
Here preferably the metallized via 5 at the coupling window is located in the SIW body cavity.
Further preferably, in one embodiment, the SIW main body cavity 12, the first cavity 4-1 and the second cavity 4-2 are all rectangular.
Further preferably, in one embodiment, the SIW main body cavity 12, the first cavity 4-1 and the second cavity 4-2 form a cross shape. Wherein the SIW body resonator 12 alone forms a cross-shaped beam or vertical beam.
Further preferably, in one embodiment, a Γ -shaped space 2 is left on each of the left and right sides of a contact portion of the microstrip feed line 1 and the metal layer 13.
Further preferably, in one of the embodiments, the two layers of overlapped dielectric resonators have a dielectric constant of the upper dielectric resonator 11 smaller than that of the lower dielectric resonator 10.
Further preferably, in one embodiment, the upper dielectric resonator 11 and the lower dielectric resonator 10 are cuboids and have different thicknesses.
Further, in one embodiment, a set of parallel rectangular slots is disposed on the ground plate 6 and above the microstrip feed line 1, the set of parallel rectangular slots includes a first rectangular slot 8 located at a middle position, and n pairs of second rectangular slots 9 symmetrically disposed on two sides of the first rectangular slot 8, and the length of the second rectangular slot 9 is greater than that of the first rectangular slot 8.
Here, n may be 1, 2, etc.
Further preferably, in one of the embodiments, the length of the second rectangular slot 9 is adjustable for changing the zero point position. The longer the length, the zero position moves to a low frequency.
As a specific example, in one embodiment, the dielectric resonator broadband antenna with filtering characteristics based on SIW feeding of the present invention is further described. With reference to fig. 2 to 4, the dielectric resonator broadband antenna 100 with filtering characteristics based on SIW feeding of the present embodiment includes five parallel coupling slots, one rectangular slot 8 with a short middle, and two longer rectangular slots 9 with the same size distributed at symmetrical positions on two sides. The relative dielectric constant of the adopted substrate 3 is 10.2, the thickness is 0.635mm, the dielectric constant of the cuboid dielectric resonator 10 is 12.3, the dielectric constant of the cuboid dielectric resonator 11 is 9.9, and other parameters are as follows:
A＝30mm、B＝21.4mm、D＝0.2mm、D1＝0.9mm、L1＝7.7mm、W1＝0.6mm、L2＝12.5mm、W2＝8.5mm、L3＝6.2mm、L4＝7mm、W4＝3.25mm、L5＝2.5mm、W5＝0.7mm、L7＝3.35mm、X1＝3.2mm、Y1＝1.6mm、X2＝3.7mm、Y2＝0.1mm、X3＝2mm、Y3＝0.3mm、G1＝0.1mm、A1＝6.7mm、B1＝6.6mm、C1＝1.6mm、A2＝6.7mm、B2＝6.6mm、C2＝2.4mm。
a, B is the length and width of the substrate 3, D, D1 is the diameter and spacing of the metalized through holes, L1 and W1 are the length and width of the microstrip feed line 1, L2 and W2 are the length and width of the main body resonant cavity 12, L3 is the relative distance of the metalized through hole 5 inside the SIW cavity, L4 and W4 are the length and width of the SIW resonant cavity 4 on both sides, W5 is the width of the r-shaped space, X1 and Y1 are the length and width of the single rectangular slot 7, X2 and Y2 are the length and width of the rectangular slot 9, X3 and Y3 are the length and width of the rectangular slot 8, G1 is the spacing of five parallel coupling slots 8 and 9, a1, B1 and C1 are the length, width and height of the lower dielectric resonator 10, and a2, B2 and C2 are the length, width and height of the upper dielectric resonator.
The embodiment carries out modeling simulation in electromagnetic simulation software, such as HFSS.18 software, and the reflection coefficient S11The parametric simulation graphs and the Gain parametric simulation graphs are shown in fig. 5 and 6, fig. 7 shows the radiation pattern of the antenna with phi being 0 ° and phi being 90 ° at 8.84GHz, fig. 8 shows the radiation pattern of the antenna with phi being 0 ° and phi being 90 ° at 9.77GHz, and fig. 9 shows the radiation pattern of the antenna with phi being 0 ° and phi being 90 ° at 10.7 GHz.
As can be seen from FIG. 5, the center frequency of the dielectric resonator broadband antenna with the filter characteristic based on SIW feeding of the embodiment is 9.77GHz, and the antenna S11<The frequency range of-10 dB is 8.84.62-10.7GHz with a relative bandwidth of 19%. Fig. 6 shows a gain curve in the direction of phi 0 ° and theta 0 °, and it can be seen that the gain is greater than 5.64dBi in 8.84 to 10.7GHz, the gain is stable, and 3 transmission zeros are generated at both sides of the passband, respectively, and are respectively at 8.34GHz, 12.92GHz and 14.4GHz, thereby forming good filtering characteristics. As can be seen from fig. 7, 8 and 9, the antenna pattern is very stable over the whole frequency band, the cross polarization is very small, and the cross polarization in the frequency band is less than-19 dB.
Fig. 10 is a simulation diagram of a Gain parameter of the transmission zero point varying with the length of the rectangular slot 9. As can be seen from the figure, when X2 is 3.9mm, the transmission zero point is 12.7 GHz; when X2 is 3.7mm, transmission zero is at 12.92 GHz; and when X2 is 3.5mm, the transmission zero point is 13.14 GHz. It can be seen that the longer the length of the rectangular slot X2, the transmission zero point moves to a low frequency, that is, the length of the rectangular slot 9 can control the position of the transmission zero point, so that the frequency position of the transmission zero point can be flexibly controlled to form a good filtering characteristic.
In summary, the dielectric resonator broadband antenna with the filtering characteristic based on the SIW feed of the invention enables the TE of the main resonant cavity to pass through the metallized through holes on the left and right sides inside the SIW resonant cavity10Increase of mode frequency to TE20Near the resonant frequency of the mode, an in-band resonant mode is added to obtain a wider bandwidth. On the basis, the two layers of overlapped dielectric resonators with different three-dimensional sizes and dielectric constants also expand the bandwidth of the antenna, so that the bandwidth of the antenna is wide. The length of the longer rectangular grooves symmetrically distributed on two sides of the plurality of parallel coupling grooves influences the position of the transmission zero point, and the longer the length is, the zero point position moves to the low frequency position, so that the frequency position of the transmission zero point can be flexibly controlled to form good filtering characteristics. In addition, the dielectric resonator is used as the radiation structure of the antenna, so that the loss of the conductor and the surface wave is avoided, the loss is small, the radiation efficiency is high, and the high antenna gain can be obtained. Therefore, the dielectric resonator broadband antenna with the filtering characteristic based on SIW feeding has excellent performance and is very suitable for modern wireless communication systems.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The dielectric resonator broadband antenna with the filtering characteristic based on SIW feeding is characterized by comprising a dielectric resonator, a ground plate (6) and a substrate (3), wherein the dielectric resonator, the ground plate (6) and the substrate (3) are sequentially arranged from top to bottom, the dielectric resonator is used as a radiation module of the antenna, an SIW resonant cavity is arranged on the substrate (3), a rectangular groove (7) is arranged above the resonant cavity and positioned on the ground plate (6), and the SIW resonant cavity is coupled with the dielectric resonator through the groove; the dielectric resonator comprises two layers of overlapped dielectric resonators, and the dielectric constants of the two layers of dielectric resonators are different.
2. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 1, wherein the SIW resonant cavity comprises metallized through holes arranged in the substrate (3) forming a SIW bulk resonant cavity (12), and a first resonant cavity (4-1) and a second resonant cavity (4-2) symmetrically distributed about and coupled to the resonant cavities, respectively; the microstrip antenna further comprises a microstrip feeder line (1) and a metal layer (13) which are arranged on the lower side of the substrate (3), and the microstrip feeder line (1) is embedded in the metal layer (13).
3. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 2, wherein the number of the through holes on each side and the distance between the through holes on both sides of the coupling window of the SIW main body resonant cavity are adjustable by the metallized through holes (5) on both sides of the coupling window, so that the TE of the SIW main body resonant cavity is adjustable20The resonant frequency of the mode is operated in the passband frequency range while the TE of the SIW body resonator is maintained10Resonant frequency of mode to TE20The resonant frequencies of the modes are close, adding an in-band resonant mode.
4. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 2, characterized in that the SIW body resonator (12), the first resonator (4-1) and the second resonator (4-2) are all rectangular.
5. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 2, characterized in that the SIW body resonator (12), the first resonator (4-1) and the second resonator (4-2) form a cross.
6. A dielectric resonator broadband antenna with filtering characteristics based on SIW feeding according to claim 2, characterized in that the left and right sides of the contact part of the microstrip feed line (1) and the metal layer (13) are respectively left with a T-shaped space (2).
7. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 1, characterized in that the two layers of overlapped dielectric resonators have dielectric constants of the upper dielectric resonator (11) that are lower than the dielectric constant of the lower dielectric resonator (10).
8. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 7, characterized in that the upper dielectric resonator (11) and the lower dielectric resonator (10) are cuboids and have different thicknesses.
9. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 1 or 2, characterized in that a set of parallel rectangular slots is arranged on the ground plane (6) above the microstrip feed line (1), the set of parallel rectangular slots comprises a first rectangular slot (8) at a middle position and n pairs of second rectangular slots (9) symmetrically arranged at both sides of the first rectangular slot (8), and the length of the second rectangular slot (9) is larger than that of the first rectangular slot (8).
10. A SIW feed based dielectric resonator broadband antenna with filter characteristics according to claim 9, wherein the length of the second rectangular slot (9) is adjustable for changing the null position.
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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN112768908A (en) * 2020-12-29 2021-05-07 南通大学 Integrated structure of differential dielectric resonator antenna and independent controllable dual-passband filter
CN112821051A (en) * 2021-01-11 2021-05-18 北京邮电大学 Millimeter wave antenna and millimeter wave antenna array
CN112968287A (en) * 2021-04-06 2021-06-15 广州智讯通信系统有限公司 Tunable slot antenna and multi-band antenna system
CN113381171A (en) * 2021-05-08 2021-09-10 天津大学 Compact filtering medium resonant antenna based on SISL structure
CN113708058A (en) * 2021-07-15 2021-11-26 深圳市信维通信股份有限公司 5G millimeter wave antenna structure and electronic equipment based on ceramic shell
CN113922091A (en) * 2021-09-24 2022-01-11 南京邮电大学 Dual-frequency broadband filtering antenna based on microstrip patch and substrate integrated waveguide resonator
CN115000686A (en) * 2022-06-17 2022-09-02 华南理工大学 Filtering antenna array based on radiation metal block
CN115730474A (en) * 2023-01-09 2023-03-03 上海霍莱沃电子系统技术股份有限公司 Method and device for constructing radiation zero point of dielectric resonator antenna
WO2024050703A1 (en) * 2022-09-06 2024-03-14 华为技术有限公司 Antenna and communication device

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CN110323526A (en) * 2019-06-20 2019-10-11 南通大学 SIW Fed Dielectric Resonator device and antenna, the power splitter for using the resonator
US20190341695A1 (en) * 2018-05-04 2019-11-07 South China University Of Technology Simple and Compact Filtering Dielectric Resonator Antenna
CN110544822A (en) * 2018-11-16 2019-12-06 西安电子科技大学 Ka-band miniaturized filtering antenna based on SIW structure

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US20160322708A1 (en) * 2013-12-20 2016-11-03 Mohammadreza Tayfeh Aligodarz Dielectric resonator antenna arrays
US20190341695A1 (en) * 2018-05-04 2019-11-07 South China University Of Technology Simple and Compact Filtering Dielectric Resonator Antenna
CN110544822A (en) * 2018-11-16 2019-12-06 西安电子科技大学 Ka-band miniaturized filtering antenna based on SIW structure
CN110323526A (en) * 2019-06-20 2019-10-11 南通大学 SIW Fed Dielectric Resonator device and antenna, the power splitter for using the resonator

Cited By (12)

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Publication number Priority date Publication date Assignee Title
CN112768908A (en) * 2020-12-29 2021-05-07 南通大学 Integrated structure of differential dielectric resonator antenna and independent controllable dual-passband filter
CN112821051A (en) * 2021-01-11 2021-05-18 北京邮电大学 Millimeter wave antenna and millimeter wave antenna array
CN112968287A (en) * 2021-04-06 2021-06-15 广州智讯通信系统有限公司 Tunable slot antenna and multi-band antenna system
CN113381171A (en) * 2021-05-08 2021-09-10 天津大学 Compact filtering medium resonant antenna based on SISL structure
CN113381171B (en) * 2021-05-08 2022-05-31 天津大学 Compact filtering medium resonant antenna based on SISL structure
CN113708058A (en) * 2021-07-15 2021-11-26 深圳市信维通信股份有限公司 5G millimeter wave antenna structure and electronic equipment based on ceramic shell
CN113708058B (en) * 2021-07-15 2023-10-17 深圳市信维通信股份有限公司 5G millimeter wave antenna structure and electronic equipment based on ceramic shell
CN113922091A (en) * 2021-09-24 2022-01-11 南京邮电大学 Dual-frequency broadband filtering antenna based on microstrip patch and substrate integrated waveguide resonator
CN113922091B (en) * 2021-09-24 2023-12-12 南京邮电大学 Dual-frequency broadband filter antenna based on microstrip patch and substrate integrated waveguide resonator
CN115000686A (en) * 2022-06-17 2022-09-02 华南理工大学 Filtering antenna array based on radiation metal block
WO2024050703A1 (en) * 2022-09-06 2024-03-14 华为技术有限公司 Antenna and communication device
CN115730474A (en) * 2023-01-09 2023-03-03 上海霍莱沃电子系统技术股份有限公司 Method and device for constructing radiation zero point of dielectric resonator antenna

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