Title :
A compact MMIC 90/spl deg/ coupler for ISM applications
Author :
Avitabile, G.F. ; Cidronali, A. ; Salvador, C. ; Speciale, M.
Author_Institution :
Dipartimento di Ingegneria Elettron., Florence Univ., Italy
Abstract :
In this paper, a new GaAs MMIC quadrature hybrid is described which is based on a lumped element approach. The MMIC makes use of interleaved spiral inductors in a transformer-like configuration and MIM capacitors. A design technique is proposed. The resulting 90/spl deg/ coupler is characterised by a reduced size (500 /spl mu/m/spl times/500 /spl mu/m). An analytical derivation of the hybrid design parameters is discussed and results are compared with experiments.
Keywords :
III-V semiconductors; MIM devices; MMIC; directional couplers; gallium arsenide; inductors; lumped parameter networks; waveguide couplers; 500 micron; GaAs; III-V semiconductors; ISM applications; MIM capacitors; MMIC 90/spl deg/ coupler; hybrid design parameters; interleaved spiral inductors; lumped element approach; quadrature hybrid; Capacitance; Circuit topology; Conductors; Coupling circuits; Inductance measurement; Inductors; MMICs; Microwave Theory and Techniques Society; Parametric statistics; Spirals;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.604574
