Title :
Investigation on the resonance observed in the embedding-impedance response of an 850-GHz waveguide HEB mixer
Author :
Jiang, L. ; Shi, S.C.
Author_Institution :
Purple Mountain Obs., Chinese Acad. of Sci., JiangSu, China
fDate :
4/1/2005 12:00:00 AM
Abstract :
A resonance is observed while simulating the embedding-impedance response of an 850-GHz waveguide hot-electron-bolometer (HEB) mixer. At the resonance frequency strong electric field is found distributed in the dc-grounded branch of the mixer´s radio frequency (RF) choke filter. In fact, the phase response of the input reflection coefficient of the dc-grounded branch demonstrates the same resonance. Furthermore, the resonance frequency shifts with the change of the dc-ground position. A 254-times scale model of the dc-grounded branch of the mixer´s RF choke filter is fabricated and measured. Experimental results are found in good agreement with the simulation results.
Keywords :
bolometers; electric impedance; hot carriers; radiofrequency filters; resonance; submillimetre wave mixers; waveguide components; 850 GHz; dc-grounded branch; electric field; embedding impedance response; hot-electron-bolometer mixer; phase response; radio frequency choke filter; resonance frequency; waveguide HEB mixer; Bandwidth; Electromagnetic waveguides; Feeds; Impedance; Inductors; Radio frequency; Reflection; Resonance; Resonant frequency; Superconducting filters; Embedding impedance; resonance; scale model; submillimeter; waveguide mixers;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.845687
