A compact filtering patch antenna with independent controllable radiation nulls

Ma Jingwei; Zhou Dongfang; Zhang Yi; Lü Dalong

doi:10.11884/HPLPB202335.220278

Volume 35 Issue 2

Jan. 2023

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Article Navigation > High Power Laser and Particle Beams > 2023 > 35(2): 023007

Ma Jingwei, Zhou Dongfang, Zhang Yi, et al. A compact filtering patch antenna with independent controllable radiation nulls[J]. High Power Laser and Particle Beams, 2023, 35: 023007. doi: 10.11884/HPLPB202335.220278

Citation:

Ma Jingwei, Zhou Dongfang, Zhang Yi, et al. A compact filtering patch antenna with independent controllable radiation nulls[J]. High Power Laser and Particle Beams, 2023, 35: 023007. doi: 10.11884/HPLPB202335.220278

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A compact filtering patch antenna with independent controllable radiation nulls

doi: 10.11884/HPLPB202335.220278

PLA Strategic Support Information Engineering University, Zhengzhou 450001, China

Received Date: 2022-09-02
Rev Recd Date: 2022-11-23

Available Online: 2022-11-28

Publish Date: 2023-01-14

Abstract

Abstract

This paper presents a compact filtering patch antenna with independent controllable radiation nulls. The antenna is principally composed of a simple radiation patch antenna and two split-shaped slots. Taking the basic microstrip patch antenna as the prototype, the filtering and frequency selection function is generated by adding the segmenting slot. Two broadside radiation nulls are generated by two slots in the upper/lower band respectively. According to the circuit structure, HFSS simulation software is used to optimize the structure and adjust the feeding position, and the filtering function is obtained. Without using additional filtering circuits, this design method saves space size and reduces the loss of antenna gain. For demonstration, a prototype is fabricated and tested. The simulation results agree well with the measured ones: the proposed microstrip patch filter antenna operates at 2.40 GHz; there are two radiation nulls at 1.96 and 2.66 GHz at two band-edges of the boresight gain response for improving skirt selectivity; at the same time, the frequency of the two radiation nulls can be controlled independently by controlling the length of the two split slots, increasing the flexibility of the design; the average realized gain of this filtering antenna is about 7.0 dBi and the out-of-band suppression level is more than 39 dB.
- filtering antenna,
- microstrip patch,
- radiation nulls,
- out-of-band suppression,
- controllable radiation nulls

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References(16)

References

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