Design of interdigital-filter based diplexer with high isolation and wideband

Gao Yang; Wen Shuwen; Yuan Jing; Xu Xiaqian

doi:10.11884/HPLPB201931.180308

Volume 31 Issue 8

Aug. 2019

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Article Navigation > High Power Laser and Particle Beams > 2019 > 31(8): 084101

Gao Yang, Wen Shuwen, Yuan Jing, et al. Design of interdigital-filter based diplexer with high isolation and wideband[J]. High Power Laser and Particle Beams, 2019, 31: 084101. doi: 10.11884/HPLPB201931.180308

Citation:

Gao Yang, Wen Shuwen, Yuan Jing, et al. Design of interdigital-filter based diplexer with high isolation and wideband[J]. High Power Laser and Particle Beams, 2019, 31: 084101. doi: 10.11884/HPLPB201931.180308

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Design of interdigital-filter based diplexer with high isolation and wideband

doi: 10.11884/HPLPB201931.180308

1.
Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621999, China
2.
School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China

Received Date: 2018-11-08
Rev Recd Date: 2019-04-05
Publish Date: 2019-08-15

Abstract

Abstract

For diplexer with high isolation and wideband in wireless communication system, in this paper, the diplexer specification is divided into Tx and Rx filter specifications with a certain margin.Then the wideband Tx and Rx filter is designed by using the microstrip interdigital structure and the improved method based on coupling coefficient Kand external quality factor Qe.Finally, two kinds of T-junction and filter combination structures are used to further design the diplexer, and the microstrip diplexer with these two structures are simulated and analyzed respectively.The simulation results show that the structure of parallel connection diplexer is compact, but the passband isolation is not satisfactory.The minimum return loss in the passband of the series connection diplexer is 14.16 dB, the maximum insertion loss is 1.01 dB, the minimum passband isolation is 53.46 dB, and the size of the diplexer is 8.089 9 mm×2.059 1 mm×0.302 mm.It has the advantages of large relative bandwidth, high isolation and low insertion loss, which provides the feasibility for the design of high-performance diplexer.
- micro-electro-mechanical systems (MEMS),
- diplexer,
- interdigital filter,
- design

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References(13)

References

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