High efficiency and broadband excitation of leaky mode in microstrip structures

Author

Qian, Y. ; Chang, B.C.C. ; Itoh, T. ; Chen, K.C. ; Tzuang, C.K.C.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

4

fYear

1999

fDate

13-19 June 1999

Firstpage

1419

Abstract

This paper reports a novel technique for high efficiency and broadband excitation of the first higher order leaky mode in microstrips. A uniplanar microstrip-to-CPS transition is employed to launch the odd leaky mode, and the mode purity is enhanced by suppressing the even fundamental mode using an optimized mode suppressor. An X-band prototype demonstrates excellent mode conversion efficiency as predicted by simulations. A record bandwidth of 20.2% is achieved for a microstrip leaky-wave source based on this newly proposed structure.

Keywords

antenna accessories; leaky wave antennas; microstrip antennas; microstrip transitions; X-band prototype; broadband excitation; even fundamental mode; first higher order leaky mode; leaky mode; microstrip leaky-wave source; microstrip structures; mode conversion efficiency; mode purity; odd leaky mode; optimized mode suppressor; uniplanar microstrip-to-CPS transition; Bandwidth; Broadband antennas; Frequency dependence; Leaky wave antennas; Microstrip antennas; Moment methods; Predictive models; Prototypes; Testing; Virtual prototyping;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1999 IEEE MTT-S International

Conference_Location

Anaheim, CA, USA

Print_ISBN

0-7803-5135-5

Type

conf

DOI

10.1109/MWSYM.1999.780215

Filename

780215