Title :
Compact Microstrip-to-CPS Transition for UWB Application
Author :
Lim, Teck Beng ; Zhu, Lei
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
A novel ultra-wideband (UWB) microstrip-to-CPS (coplanar stripline) transition has been developed. This transition or balun structure has several attractive advantages such as good impedance transformation, compact size and wide bandwidth. After the parallel-coupled line section between the microstrip line and CPS is investigated under varied traversal dimensions, a wide transmitting band is well achieved with the emergence of two transmission poles. Next, such a single transition circuit is optimally designed to cover the whole UWB band (3.1 GHz to 10.6 GHz). To verify the predicted results in experiment, the two back-to-back transitions with the same 50 Omega microstrip feed lines are fabricated and tested. Measured results exhibit the return loss close to 10.0 dB over a band from 3.5 GHz to 10.0 GHz.
Keywords :
coplanar waveguides; microstrip transitions; microwave circuits; ultra wideband technology; CFS; back-to-back transitions; balun structure; bandwidth 3.1 GHz to 10.6 GHz; impedance transformation; microstrip feed line; parallel-coupled line section; return loss; single transition circuit; transmission poles; ultra-wideband microstrip-to-coplanar stripline transition; wide transmitting band; Bandwidth; Bonding; Coplanar transmission lines; Distributed parameter circuits; Impedance matching; Insertion loss; Microstrip components; Planar transmission lines; Transmission lines; Wire;
Conference_Titel :
Art of Miniaturizing RF and Microwave Passive Components, 2008. IMWS 2008. IEEE MTT-S International Microwave Workshop Series on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-2876-2
Electronic_ISBN :
978-1-4244-2877-9
DOI :
10.1109/IMWS.2008.4782286
