Miniaturized cavity filter based on TM<sub>010</sub> mode dielectric resonators

Zeng Liuxing; Lin Fumin; Xiao Yujie

doi:10.11884/HPLPB201830.180043

Volume 30 Issue 9

Sep. 2018

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Zeng Liuxing, Lin Fumin, Xiao Yujie. Miniaturized cavity filter based on TM010 mode dielectric resonators[J]. High Power Laser and Particle Beams, 2018, 30: 093003. doi: 10.11884/HPLPB201830.180043

Citation:

Zeng Liuxing, Lin Fumin, Xiao Yujie. Miniaturized cavity filter based on TM₀₁₀ mode dielectric resonators[J]. High Power Laser and Particle Beams, 2018, 30: 093003. doi: 10.11884/HPLPB201830.180043

Zeng Liuxing, Lin Fumin, Xiao Yujie. Miniaturized cavity filter based on TM010 mode dielectric resonators[J]. High Power Laser and Particle Beams, 2018, 30: 093003. doi: 10.11884/HPLPB201830.180043

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Miniaturized cavity filter based on TM₀₁₀ mode dielectric resonators

doi: 10.11884/HPLPB201830.180043

School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

Received Date: 2018-01-27
Rev Recd Date: 2018-05-11
Publish Date: 2018-09-15

Abstract

Abstract

The dielectric cavity filter used for 4G base station usually adopts TE_01δ mode dielectric resonators. Its quality factor Q value is very high, but its size is relatively large. In order to miniaturize the dielectric cavity filter, TM₀₁₀ mode dielectric resonator is innovatively used. Although its Q value is relatively low, it can also meet the requirements of high band rejections. In this paper, the port coupling, magnetic coupling and electric coupling between two resonators are analyzed. Dielectric openings are innovatively used to create electric couplings, which are easy to machine and reduce manufacturing costs. Besides, an 8-pole quasi-elliptic function filter with two pairs of transmission zeros that can improve the close-to-band rejection slopes is designed and its passband is 2570 MHz to 2620 MHz, TD-LTE band. The debugging results show that the TM₀₁₀ mode dielectric cavity filter can not only meet the requirements of low insertion loss and high band rejections, but also reduce its size greatly.
- dielectric resonator,
- dielectric cavity filter,
- 4G base station filter,
- quasi-elliptic function filter,
- TM₀₁₀ mode

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References(11)

References

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