Low-Loss Self-Packaged Ka-Band LTCC Filter Using Artificial Multimode SIW Resonator

In this brief, a low-loss self-packaged Ka-band LTCC filter is proposed based on an artificial multi-mode substrate integrated waveguide (SIW) resonator. Two ridges and two metal strips are tightly integrated in one SIW cavity to form the artificial quad-mode resonator. Due to the shielding of the S...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2023-02, Vol.70 (2), p.451-455
Main Authors: Huang, Xiaolong, Zhang, Xiuyin, Zhou, Liang, Xu, Jin-Xu, Mao, Jun-Fa
Format: Article
Language:English
Subjects:
Artificial multi-mode resonator
Band-pass filters
Bandpass filters
Cavity resonators
Couplings
Extremely high frequencies
Insertion loss
low loss
LTCC
Metal strips
Metals
Millimeter waves
millimeter-wave filter
Q factors
Q-factor
Resonant frequency
Resonator filters
Selectivity
self-packaged
Strips
Substrate integrated waveguides
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Summary:In this brief, a low-loss self-packaged Ka-band LTCC filter is proposed based on an artificial multi-mode substrate integrated waveguide (SIW) resonator. Two ridges and two metal strips are tightly integrated in one SIW cavity to form the artificial quad-mode resonator. Due to the shielding of the SIW cavity, the resonator realizes a high Q factor, which contributes to an extremely low loss of the Ka-band filter. A fast design method for the bandpass filter based on an artificial multi-mode resonator is introduced. A simple approach to accurately extract all external Q factors for multiple resonant modes at the same time is also discussed. A pair of transmission zeros are generated to improve the filter skirt selectivity. For verification, a filter operating at 28 GHz is fabricated on the LTCC process. The measured result shows a low insertion loss of 0.8 dB, which is attracted in millimeter-wave applications.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2022.3173712