Distributed Amplifier with CRLH-Transmission Line Leaky Wave Antenna

Author

Mori, Kohei ; Itoh, Tatsuo

Author_Institution

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

fYear

2008

fDate

27-31 Oct. 2008

Firstpage

686

Lastpage

689

Abstract

We propose a distributed amplifier integrated with a CRLH leaky wave antenna. This active antenna uses the interdigital capacitor-based CRLH transmission line, microstrip line and FETs. To coordinate the phase between the guided slow-wave in the microstrip section and fast-wave in the CRLH radiator, the length of the unit cell of the microstrip section is shortened and FETs are connected with a constant phase coupling line. The signal travels to each unit-cell through FETs and radiate from the CRLH antenna. This antenna radiates an amplified forward wave in the right hand region and an amplified backward wave in the left hand region. A 5 unit-cell prototype demonstrates the proposed active leaky wave antenna. The measured and simulated forward and reverse gains exhibit good agreement, and beam scanning can be observed.

Keywords

antenna radiation patterns; distributed amplifiers; field effect transistors; leaky wave antennas; microstrip lines; transmission lines; CRLH-transmission line leaky wave antenna; FET; antenna radiation; distributed amplifier; interdigital capacitor; microstrip line; Antennas and propagation; Couplings; Distributed amplifiers; FETs; Frequency response; Impedance; Leaky wave antennas; Microstrip antennas; Power transmission lines; Propagation constant;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008. EuMC 2008. 38th European

Conference_Location

Amsterdam

Print_ISBN

978-2-87487-006-4

Type

conf

DOI

10.1109/EUMC.2008.4751545

Filename

4751545