Title :
A wideband variable waveguide coupler for millimeter applications
Author :
Schuster, K.-F. ; Carter, M. ; Charriere, D. ; Lamb, J. ; Mattiocco, F.
Author_Institution :
IRAM, St. Martin-d´´Heres, France
fDate :
7/1/1997 12:00:00 AM
Abstract :
We present a variable waveguide coupler for the short millimeter-wavelength range. The coupler has low ohmic and insertion losses in all paths, flat coupling characteristic, and high directivity over a large bandwidth. The construction of the coupler allows a variable independent adjustment of power transferred into several paths when several couplers are used in series. The coupler is therefore useful for multichannel receivers and especially for superconductor-insulator-superconductor (SIS) mixer arrays where individual local oscillator (LO) power adjustment might be necessary. We present measurements for a coupler working at 230 GHz and compare them with a simple analytical model
Keywords :
millimetre wave couplers; waveguide couplers; 230 GHz; LO power adjustment; SIS mixer arrays; flat coupling characteristic; high directivity; local oscillator power adjustment; low insertion loss; low ohmic losses; millimeter applications; multichannel receivers; short MM-wave range; superconductor-insulator-superconductor mixer; wideband variable waveguide coupler; Bandwidth; Blades; Dielectrics; Frequency; Insertion loss; Local oscillators; Millimeter wave technology; Propagation constant; Superconducting devices; Wideband;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
