A new two-terminal feeding active leaky-wave antenna

Author

Wang, Chien Jen ; Jou, Christina F. ; Wu, Jin Jei

Author_Institution

Inst. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

46

Issue

11

fYear

1998

fDate

11/1/1998 12:00:00 AM

Firstpage

1749

Lastpage

1750

Abstract

A new two-terminal feeding active-integrated leaky-wave antenna design is demonstrated. The X-band microstrip two-terminal feeding leaky-wave antenna is integrated with an active high-electron mobility transistor (HEMT) oscillator to produce a two-beam radiation pattern. The antenna is fed asymmetrically at both sides to excite the first higher order mode. This configuration, as compared to a single-terminal feeding leaky-wave antenna, has the advantage of the multidirection and the reduction of the reflected wave caused by the open end of the radiating element. Measured results show that the radiation directions of two beams are approximately at 34° and 140°, the effectively isotropic radiated power (EIRP) is close to 17.5 dBm, and the return loss is almost less than -10 dB between 9 and 11.5 GHz

Keywords

HEMT circuits; active antennas; antenna feeds; antenna radiation patterns; leaky wave antennas; microstrip antennas; microwave oscillators; multibeam antennas; 9 to 11.5 GHz; EIRP; HEMT oscillator; X-band microstrip leaky-wave antenna; effectively isotropic radiated power; high-electron mobility transistor; reflected wave reduction; return loss; two-beam radiation pattern; two-terminal feeding active leaky-wave antenna; Antenna measurements; Antenna radiation patterns; Circuits; Frequency; HEMTs; Leaky wave antennas; MODFETs; Microstrip antennas; Oscillators; Reflector antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.736635

Filename

736635