Control of 120-GHz-Band Split Ring Resonator Filter by Coupling Lattice Pattern Substrate

Koichiro ITAKURA  Akihiko HIRATA  Masato SONODA  Taiki HIGASHIMOTO  Tadao NAGATSUMA  Takashi TOMURA  Jiro HIROKAWA  Norihiko SEKINE  Issei WATANABE  Akifumi KASAMATSU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E104-C   No.3   pp.102-111
Publication Date: 2021/03/01
Publicized: 2020/09/08
Online ISSN: 1745-1353
DOI: 10.1587/transele.2019ECP5052
Type of Manuscript: PAPER
Category: Electronic Circuits
Keyword: 
millimeter-wave filter,  millimeter-wave propagation,  millimeter-wave communication,  

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Summary: 
This paper presents a 120-GHz-band split ring resonator (SRR) bandstop filter whose insertion loss can be controlled by coupling another lattice pattern substrate. The SRR bandstop filter and lattice pattern substrate is composed of 200-µm-thick quartz substrate and 5-µm-thick gold patterns. S21 of the SRR bandstop filter is -37.8 dB, and its -10-dB bandwidth is 115-130 GHz. S21 of the SRR bandstop filter changes to -4.1 dB at 125 GHz by arranging the lattice pattern substrate in close proximity to the SRR stopband filter, because coupling between the SRR and the lattice pattern occurs when the SRR and lattice pattern are opposed in close proximity. It was found that 10 Gbit/s data transmission can be achieved by setting the lattice pattern substrate just above the SRR bandstop filter with a spacer thickness of 50 µm, even though data transmission is impossible when only the SRR bandstop filter is inserted between the transmitter and the receiver.