Title :
Planar impedance transformer
Author_Institution :
Zydeco Dev. Ltd., Neuilly-sur-Seine, France
fDate :
5/1/1999 12:00:00 AM
Abstract :
A transformer with two overlapping windings etched on either side of a planar substrate is presented in this paper. It performs an impedance transformation with a 3.3 ratio within a small area. A simple model is derived, based on well-known formulas for transmission lines and inductance factors of multiple conductors. Magnetic and electric coupling are analyzed separately. An experiment shows a good accuracy for this model
Keywords :
UHF circuits; UHF integrated circuits; electric impedance; equivalent circuits; high-frequency transformers; impedance matching; inductance; modelling; printed circuits; PCB substrate; RFIC; electric coupling; etched planar substrate; inductance factors; magnetic coupling; model; overlapping windings; planar impedance transformer; Conductors; Costs; Coupling circuits; Equivalent circuits; Etching; Impedance; Inductance; Magnetic analysis; Strips; Wire;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
