Title :
Design and modeling of transmission line transformers
Author :
Horn, Johannes ; Boeck, Georg
Author_Institution :
Microwave Eng. Group, Berlin Univ. of Technol., Germany
Abstract :
Equivalent circuitry for straight transmission line transformers (TLT) is presented. The circuits deploy transmission line theory to describe wave propagation of both the signal modes and the parasitic (ferrite) mode. The validity of this approach is demonstrated for two different TLTs. Both devices have an upper frequency limit of 5.5 GHz. Through the use of a single ferrite tube a lower frequency limit down to 1 MHz is achieved.
Keywords :
equivalent circuits; impedance convertors; impedance matching; microwave filters; microwave photonics; multiconductor transmission lines; transmission line theory; 5.5 GHz; coaxial lines; equivalent circuitry; impedance transformation ratio; parasitic mode; signal modes; single ferrite tube; straight transmission line transformers; transmission line theory; upper frequency limit; wave propagation; Apertures; Bandwidth; Coaxial components; Distributed parameter circuits; Ferrites; Frequency; Power transmission lines; Transformers; Transmission line theory; Transmission lines;
Conference_Titel :
Microwave and Optoelectronics Conference, 2003. IMOC 2003. Proceedings of the 2003 SBMO/IEEE MTT-S International
Print_ISBN :
0-7803-7824-5
DOI :
10.1109/IMOC.2003.1244897
