Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 55, Issue 12, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac44bf
Keywords
bandpass filters; diplexers; dispersion curve; substrate integrated waveguide (SIW); miniaturization; spoof surface plasmon polariton (SSPP)
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Funding
- FY2019 JSPS Postdoctoral Fellowship for Research in Japan [P19350]
- JST SPRING [JPMJSP2114]
- NSAF Joint Fund [U2130102]
- Natural Science Foundation of Shaanxi Province [2021JQ-060]
- 'Siyuan Scholar' Fellowship of XJTU
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A new design of half-mode substrate integrated plasmonic waveguide (HMSIPW) is proposed to achieve the characteristics of bandpass filter (BPF) and miniaturization by combining with spoof surface plasmon polariton (SSPP) structure. The experimental prototypes of the filters and diplexer have shown good agreement with the simulation results. The proposed designs have great potential in integrated devices and circuits for wireless communication systems.
A half-mode substrate integrated waveguide (HMSIW) combined with spoof surface plasmon polariton (SSPP) structure is proposed to realize bandpass filter (BPF) characteristic and miniaturization, which is termed as the half-mode substrate integrated plasmonic waveguide (HMSIPW). Compared with the conventional HMSIW structure having identical cutoff frequency, this new design of HMSIPW not only supports SSPP modes, but also realizes a transversal size reduction of 19.4% and longitudinal reduction of more than 60%. Then, a diplexer based on two back-to-back placed HMSIPW BPFs is designed, and it has only one row of metallized via holes to further reduce the transversal size. The experimental prototypes of the filters and diplexer have been manufactured, and the measurement results agree well with simulation ones. Due to the size miniaturization and simple structure, the proposed designs will have many potentials in the integrated devices and circuits for wireless communication systems.
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