Title :
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
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;
Conference_Titel :
Microwave Conference (EuMC), 2011 41st European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-235-6
