Combined gain-enhanced power recycling feedbacks for distributed amplifier-based CRLH-leaky wave antennas

Author

Wu, Chung-Tse Michael ; Itoh, Tatsuo

Author_Institution

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

fYear

2011

fDate

10-13 Oct. 2011

Firstpage

499

Lastpage

502

Abstract

A distributed amplifier based CRLH-leaky wave antenna (LWA) equipped simultaneously with two types of power recycling scheme is proposed. By connecting a closed loop to the LWA on the drain side of the distributed amplifier, we can obtain gain enhancement compared to the one directly terminated without the loop. In addition to this, by using a rat- race coupler connected to the gate line, we can have extra +3dB gain increase theoretically. The operation frequency is designed at the broadside frequency of the CRLH-LWA. The methodology is demonstrated through the measurement and simulation in this paper.

Keywords

UHF amplifiers; UHF antennas; circuit feedback; distributed amplifiers; leaky wave antennas; metamaterial antennas; waveguide couplers; closed loop; composite right-left handed leaky wave antennas; distributed amplifier; frequency 2.32 GHz; gain enhanced power recycling feedback; rat race coupler; Antenna measurements; Couplers; Insertion loss; Leaky wave antennas; Loss measurement; Recycling; Transmission line measurements; Active antenna; CRLH-transmission lines; Distributed Amplifiers; Leaky wave antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2011 41st European

Conference_Location

Manchester

Print_ISBN

978-1-61284-235-6

Type

conf

Filename

6101771