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 language | English |
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Pages (from-to) | 1195-1198 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 31 |
Issue number | 11 |
Early online date | 13 Jul 2021 |
DOIs | |
Publication status | E-pub ahead of print - 13 Jul 2021 |
Bibliographical note
Publisher Copyright:IEEE
Keywords
- 3-D printing
- Band-pass filters
- Dual mode filter
- Filtering theory
- Microwave filters
- Microwave theory and techniques
- Resonator filters
- Resonators
- SLM printing
- Tuning
- ellipsoid resonator filter
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering