Title :
Modeling and design of multilayer transmission line transformers and baluns
Author_Institution :
Microwave Eng., Technische Univ. Berlin, Germany
Abstract :
A transmission line balun and a transmission line impedance transformer are described. Both transformers were realized as part of a four-layer laminate PCB using a planar, quasi-coaxial transmission line structure. Approximately a decade bandwidth was achieved, with operating frequencies in the lower and sub Gigahertz range. Both transformers employ the same planar coil geometry, covering an area of less then 0.6 cm2. As their power handling capability is merely limited by that of the planar transmission lines, the transformers can be used in medium power applications.
Keywords :
baluns; printed circuits; transformers; transmission lines; four-layer laminate PCB; multilayer transmission line transformers; planar coil geometry; planar transmission line structure; quasi-coaxial transmission line structure; transmission line balun; transmission line impedance transformer; Bandwidth; Coils; Frequency; Impedance matching; Laminates; Nonhomogeneous media; Planar transmission lines; Power transmission lines; Transformers; Transmission lines;
Conference_Titel :
Microwave and Optoelectronics, 2005 SBMO/IEEE MTT-S International Conference on
Print_ISBN :
0-7803-9341-4
DOI :
10.1109/IMOC.2005.1579984