Title :
A novel planar dual balun for Doubly Balanced star mixer
Author :
Kim, Sun-Sook ; Lee, Jong-Hwan ; Yeom, Kyung-Whan
Author_Institution :
Dept. of Radio Sci. & Eng., Chungnam Nat. Univ., Daejeon, South Korea
Abstract :
A novel planar dual balun for doubly balanced star mixer is presented. The balun consists of two identical Marchand baluns using coupled microstrip lines. It shows the amplitude imbalance within 1.2 dB and the phase imbalance within 180±1.5° over 1.2 to 2.8 GHz. The star mixer using a pair of the suggested balun has the conversion loss about 6 dB in the band.
Keywords :
baluns; microstrip lines; microwave mixers; waveguide components; Marchand baluns; amplitude imbalance; conversion loss; coupled microstrip lines; doubly balanced star mixer; dual balun; phase imbalance; planar balun; Bandwidth; Coplanar transmission lines; Coupling circuits; Dielectric substrates; Diodes; Hybrid junctions; Impedance matching; MMICs; Microstrip; Packaging; Doubly balanced star mixer; planar dual balun;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.832079
