Title :
Active asymmetrically feeding dual-beam leaky-wave antenna
Author :
Wang, Chien-Jen ; Jou, Christan F. ; Wu, Jin-Jei ; Peng, Song-tsuen
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
An active-integrated dual-beam scanning leaky-wave antenna design is developed in this paper. A varactor-tuned HEMT VCO as an active source, integrates with an X-band two-terminal asymmetrically feeding microstrip leaky-wave antenna on the same plane. This approach creates a dual-beam radiation pattern and has the advantages of multi-direction and no reflected wave caused by the open end of the radiating element, as compared to a traditionally single-terminal feeding leaky-wave antenna. Measured results on the experimental antenna show that the total scanning angle of two beams of this antenna configuration is approximately 44°. The maximum Effective Isotropic Radiated Power (EIRP) are close to 17.5 dBm for the right beam and 16.67 dBm for the left beam at 10.4-GHz, and the power difference between the two beams is less than 1 dB
Keywords :
active antennas; antenna feeds; antenna radiation patterns; leaky wave antennas; microstrip antennas; microwave oscillators; scanning antennas; varactors; voltage-controlled oscillators; 9.7 to 11.3 GHz; EIRP; HEMT VCO; X-band two-terminal antenna; active-integrated antenna design; asymmetrically-fed antenna; dual-beam leaky-wave antenna; dual-beam radiation pattern; varactor-tuned oscillator; Antenna measurements; Antenna radiation patterns; Circuit topology; Design engineering; Frequency measurement; HEMTs; Leaky wave antennas; Microstrip antennas; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Microwave and Millimeter Wave Technology Proceedings, 1998. ICMMT '98. 1998 International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4308-5
DOI :
10.1109/ICMMT.1998.768283
