SLM printed waveguide dual-mode filters with reduced sensitivity to fabrication imperfections

Xiaozhu Wen, Cheng Guo, Xiaobang Shang, Yang Yu, Minjie Shu, Qian Yang, Sheng Li, Moataz M. Attallah, Hongzhong Liu, Anxue Zhang

Research output: Contribution to journalLetterpeer-review

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Abstract

This letter presents a 8th-order dual-mode waveguide filter, fabricated using selective laser melting (SLM) technique. The filter employs four dimpled ellipsoid dual-mode resonators, operating at the fundamental TM101 mode. During printing, the filter can be mechanically self-supported without any internal supports. Compared to the filters employing tuning posts, the proposed filter is less sensitive to fabrication errors in terms of their impacts on passband return loss (RL), frequency shift and bandwidth. The filter was demonstrated at WR-112 band (7-10 GHz), with a measured insertion loss of 0.25-0.4 dB and a RL >15 dB across the passband of 8-8.46 GHz.

Original languageEnglish
JournalIEEE Microwave and Wireless Components Letters
Early online date13 Jul 2021
DOIs
Publication statusE-pub ahead of print - 13 Jul 2021

Keywords

  • 3-D printing
  • Band-pass filters
  • Dual mode filter
  • ellipsoid resonator filter
  • Filtering theory
  • Microwave filters
  • Microwave theory and techniques
  • Resonator filters
  • Resonators
  • SLM printing
  • Tuning

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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