Title :
The power transfer mechanism of MMIC spiral transformers and adjacent spiral inductors
Author :
Howard, G.E. ; Dai, J. ; Chow, Y.L. ; Stubbs, M.G.
Author_Institution :
Waterloo Univ., Ont., Canada
Abstract :
The WATMIC-EMsim software is currently being used to analyze the coupling between the two coils of an MMIC (monolithic microwave integrated circuit) transformer and between two adjacent MMIC square spiral inductors. For the transformer it is found that the simple magnetic coupling in power transfer between the two coils only occurs at the low frequency end of the microwave range. For the adjacent inductors, it is found that the coupling S/sub 21/ is very small. It starts at -26 dB when the two spirals nearly touch and rapidly drops off a function of 1/d/sup 7/, where d is the center-to-center separation between the two spirals.<>
Keywords :
MMIC; S-parameters; circuit analysis computing; equivalent circuits; inductors; losses; magnetic circuits; transformers; MMIC; WATMIC-EMsim software; adjacent spiral inductors; magnetic coupling; monolithic microwave integrated circuit; power transfer mechanism; scattering matrix response; spiral transformers; square spiral inductors; Coils; Coupling circuits; Inductors; MMICs; Magnetic analysis; Magnetic separation; Microwave integrated circuits; Monolithic integrated circuits; Spirals; Transformers;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38953
