Dual-Mode Dielectric Waveguide Monoblock Filter Design

Authors

  • Yahui Wu Department of Research and Development, Anhui Tatfook Technology Co., Ltd., Shenzhen, 518104, China. https://orcid.org/0000-0002-7600-3430
  • Lukui Jin Department of Research and Development, Anhui Tatfook Technology Co., Ltd., Shenzhen, 518104, China. https://orcid.org/0000-0003-3938-3443
  • Zhenxiong Xie Department of Research and Development, Anhui Tatfook Technology Co., Ltd., Shenzhen, 518104, China.

DOI:

https://doi.org/10.37256/jeee01010002

Keywords:

dielectric resonator, dual-mode, bandpass filter

Abstract

This paper presents a design of dielectric waveguide filter using dual-mode dielectric waveguide resonators (DWRs). The filter is formed by a ceramic monoblock, thus it is compact and ease of fabrication. The employed degenerate modes of DWR are TE101 and TE011 mode, which can be coupled by a slot on the dielectric block. The coupling between a dual-mode DWR and a single-mode DWR is realized by aperture and slot. The external coupling is realized by a silver-coated blind hole that aligns to the mode for excitation. Transmission zero (TZ) can be flexibly generated above or below passband, by changing the relative position of coupling slot. A sixth order bandpass filter working at 4.9 GHz is designed using dual- and single-mode DWRs. The filter is fabricated and measured, agreeing well with simulation. This filter has compact size, low insertion loss, good selectivity and wide spurious-free response, which is applicable to 5G base stations.

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Published

2022-10-18

How to Cite

(1)
Wu, Y.; Jin, L.; Xie, Z. Dual-Mode Dielectric Waveguide Monoblock Filter Design. J. Electron. Electric. Eng. 2022, 1, 2.