Title :
38/76 GHz PHEMT MMIC balanced frequency doublers in coplanar technology
Author :
Campos-Roca, Y. ; Verweyen, L. ; Fernandez-Barciela, M. ; Bischof, W. ; Curras-Francos, M.C. ; Sanchez, E. ; Hulsmann, A. ; Schlechtweg, Michael
Author_Institution :
Fraunhofer Inst. for Appl. Solid State Phys., Freiburg, Germany
Abstract :
Two 38/76 GHz push-push frequency doublers have been realized in a 0.15 μm GaAs PHEMT technology. The circuits are based on different 180/spl deg/ power divider structures: a Lange coupler followed by a 90/spl deg/ transmission line, and a balun. The circuits achieve maximum conversion gains of -4 and -6 dB for 12 and 14 dBm input signals, respectively. The fundamental suppression is approximately 30 dBc in both cases. To our knowledge, these results represent the best performance reported to date for W-band balanced doublers.
Keywords :
HEMT integrated circuits; III-V semiconductors; MMIC frequency convertors; baluns; coplanar waveguide components; field effect MMIC; frequency multipliers; gallium arsenide; millimetre wave couplers; power dividers; 0.15 micron; 38 GHz; 76 GHz; GaAs; III-V semiconductors; Lange coupler; PHEMT MMIC; W-band; balanced frequency doublers; balun; conversion gains; coplanar technology; power divider structures; push-push frequency doublers; Coplanar transmission lines; Coupling circuits; Distributed parameter circuits; Frequency; Gallium arsenide; Impedance matching; MMICs; PHEMTs; Power dividers; Power transmission lines;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
