Title :
Ultra Compact 24 GHz MMIC Quasi-lumped Quadrature Coupler
Author :
Cantu, H.I. ; Fusco, V.F.
Author_Institution :
Inst. of Electron., Commun. & Inf. Technol., Queen Univ., Belfast
Abstract :
In this paper the design, fabrication and test of a 90deg hybrid coupler MMIC based on an ultra compact quasi-lumped design is presented for use in the 24 GHz ISM frequency band. The insertion loss and isolation of the coupler are 0.5 dB and -17 dB respectively, and the return loss for the coupler is better than -15 dB over a 14% bandwidth. The technology used is GaAs and the coupler consists of parallel lambda/8 long 50 Omega lines separated by lumped capacitors. The structure occupies 0.15 times the area of an equivalent lambda/4 distributed hybrid coupler
Keywords :
III-V semiconductors; MMIC; gallium arsenide; hybrid integrated circuits; waveguide couplers; 0.5 dB; 24 GHz; GaAs; ISM frequency band; MMIC coupler; distributed hybrid coupler; lumped capacitors; microwave coupler; quadrature coupler; quasilumped coupler; ultra compact coupler; Admittance; Capacitors; Coupling circuits; Electronic equipment testing; Fabrication; Gallium arsenide; Impedance; Insertion loss; MMICs; Transmission lines; Even and Odd Mode Analysis; GaAs MMIC; Quadrature Couplers;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249714
