A very compact CPW-to-CPS BALUN for UWB antenna feeding

Author

Vasylchenko, Alexander ; Wang, Linyu ; Ma, Zhongkun ; De Raedt, Walter ; Vandenbosch, Guy A E

Author_Institution

ESAT-TELEMIC, K. U. Leuven, Leuven, Belgium

fYear

2008

fDate

3-5 Dec. 2008

Firstpage

446

Lastpage

449

Abstract

This paper considers an UWB balun optimized for a frequency band from 6 to 8.5 GHz. The balun provides a transition from unbalanced coplanar waveguide (CPW) to balanced coplanar stripline (CPS), which is suitable for feeding broadband coplanar antennas such as Vivaldi or bow-tie antennas. It is shown, that applying a solid ground plane under the CPS-to-CPS transition enables decreasing its area by a factor of 4.7. Such compact balun can be used for feeding uniplanar antennas, while significantly saving substrate area. Several transition configurations have been fabricated for single and double-layer configurations. They have been verified by comparison with results both from a full-wave electromagnetic (EM) simulation and experimental measurements.

Keywords

antenna feeds; baluns; coplanar waveguides; strip lines; ultra wideband antennas; CPS balun; CPW; UWB antenna feeding; Vivaldi antennas; bow-tie antennas; coplanar stripline; coplanar waveguide; frequency 6 GHz to 8.5 GHz; full-wave electromagnetic simulation; uniplanar antennas; Antenna feeds; Broadband antennas; Coplanar waveguides; Electromagnetic waveguides; Frequency; Impedance matching; Solids; Stripline; Ultra wideband antennas; Waveguide transitions; CPW-to-CPS; UWB; Vivaldi antenna; balun; transition;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Electronics Engineers in Israel, 2008. IEEEI 2008. IEEE 25th Convention of

Conference_Location

Eilat

Print_ISBN

978-1-4244-2481-8

Electronic_ISBN

978-1-4244-2482-5

Type

conf

DOI

10.1109/EEEI.2008.4736567

Filename

4736567