Title :
Integrated directional coupler for 90 and 180 GHz
Author :
Wohlgemuth, O. ; Krems, T. ; Reuter, R. ; Rodwell, M.J.W. ; Haydl, W. ; Schlechtweg, M.
Author_Institution :
Fraunhofer Inst. for Appl. Solid State Phys., Freiburg, Germany
fDate :
8/1/1999 12:00:00 AM
Abstract :
The authors present coplanar integrated directional couplers for 90 and 180 GHz with a 60 GHz (120 GHz) bandwidth and up to 20 dB directivity. A three-dimensional (3-D) field simulator has been used to calculate the complex propagation constants and the impedances of the two modes. For the first time, the comparison of simulated and measured S-parameters up to 230 GHz shows the validity of the design approach and the capability of integrated coplanar couplers
Keywords :
S-parameters; coplanar waveguide components; coupled transmission lines; millimetre wave directional couplers; 120 GHz; 180 GHz; 230 GHz; 3D field simulator; 60 GHz; 90 GHz; GaAs; S-parameters; complex propagation constants; coplanar integrated directional couplers; Bandwidth; Circuit simulation; Coplanar transmission lines; Coupling circuits; Dielectric constant; Directional couplers; Frequency; Impedance; Propagation constant; Transmission line theory;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
