Title :
Tunable whispering gallery mode resonance structure for millimeter-wave/sub-THz applications
Author :
Taeb, Aidin ; Gigoyan, Suren ; Rafi, Gholamreza Z. ; Safavi-Naeini, Safieddin ; Basha, Mohamed
Author_Institution :
ECE Dept., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
This paper presents a novel approach to realize a low-cost wide tunable Whispering Gallery Mode (WGM) resonance-based structure at Millimeter-wave and sub-THz range of frequencies. The tunability is achieved by moving a metallic structure over the WGM resonator using a micro-positioner. Perturbing the WGM resonance causes shift in the resonance frequency and the coupling. Two types of perturbation are tested for two different structures: grounded Alumina-based WGM resonance structure and Silicon-On-Glass (SOG) WGM resonance structure, operating in D-band (110-170 GHz) and G-band (140-220 GHz), respectively. The experimental results reveal the SOG-based resonator has tuning range of 4.5 GHz at 154 GHz and resonance depth better than -20 dB over the tuning range.
Keywords :
millimetre wave resonators; whispering gallery modes; D-band; G-band; WGM resonator; alumina-based WGM resonance structure; frequency 110 GHz to 170 GHz; frequency 140 GHz to 220 GHz; frequency 4.5 GHz; metallic structure; micropositioner; silicon-on-glass WGM resonance structure; whispering gallery mode; Frequency measurement; Microwave filters; Microwave imaging; Optical resonators; Resonant frequency; Tuning; dielectric waveguide; millimeter-waeve; resonance; tuning; whispering gallery mode;
Conference_Titel :
Microwave Conference (EuMC), 2014 44th European
Conference_Location :
Rome
DOI :
10.1109/EuMC.2014.6986558
