Design and Analysis of Multi-Mode Stripline Resonator and Its Application to Bandpass Filter

Masaya TAMURA  Shosei TOMIDA  Kento ICHINOSE  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.3   pp.151-160
Publication Date: 2018/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.151
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
multimode resonator,  stripline resonator,  bandpass filter,  narrow bandpass filter,  

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Summary: 
We present a design approach and analysis of a multimode stripline resonator (MSR). Furthermore, a bandpass filter (BPF) using a single MSR is presented. MSR has three fundamental modes, incorporating two transmission resonance modes and one quasi-lumped component (LC) resonance mode. The resonant frequencies and unloaded Q factors of those modes are theoretically derived by transmission modes and LC modes. By our equations, it is also explained that the resonant frequencies can be shown to be easily handled by an increase and decrease in the number of via holes. These frequencies calculated by our equations are in good agreement with those of 3-D simulations and measurements. Finally, design approach of a narrow bandpass filter using our resonator is introduced. Good agreement between measured and computed result is obtained.