Title :
On the improvement of planar multisection balun
Author :
Galal, Ola M. ; Safwat, Amr M E ; El-Hennawy, H.M.
Author_Institution :
Dept. of Electron. & Commun. Eng., Ain Shams Univ., Cairo, Egypt
Abstract :
A planar multisection-coupled line balun is presented. The design is based on the cascaded quarter wave coupled line. The even and odd mode impedances are chosen to provide very high even impedance. In this paper, the layout of the circuit is optimized for maximum operating bandwidth. The balun characteristics are 0.5 db amplitude balance with 2.8 GHZ center frequency and 39% bandwidth. The balun is fabricated on FR-4 and measured. Measurements are in very good agreement with simulated data.
Keywords :
MMIC; baluns; cascade networks; circuit optimisation; coupled circuits; impedance matching; integrated circuit layout; amplitude balance; balun characteristic; balun fabrication; cascaded quarter wave coupled line; circuit layout; circuit optimization; even-odd mode impedance; maximum operating bandwidth; planar multisection coupled line balun circuit design; Bandwidth; Capacitance; Circuit simulation; Coupled mode analysis; Coupling circuits; Dielectric measurements; Frequency; Impedance matching; VHF circuits; Voltage;
Conference_Titel :
Radio Science Conference, 2004. NRSC 2004. Proceedings of the Twenty-First National
Print_ISBN :
977-5031-77-X
DOI :
10.1109/NRSC.2004.1321798
