An novel L-shape active leaky-wave antenna with power combining and scanning capability

Author

I-Yu Chen ; Chien-Jen Wang ; Jou, Christina F.

Author_Institution

National Chiao Tung Univ., Hsinchu, Taiwan

Volume

1

fYear

2005

fDate

4-7 Dec. 2005

Abstract

In this paper, an active-integrated leaky-wave antenna with power combining scanning capability is presented. This leaky-wave antenna with the novel perpendicular L-shape topology is integrated with a varactor-tuned high-electron mobility transistor (HEMT) voltage controlled oscillator (VCO) on the same plane. Changing the VCO frequency, we can control not only the dual-beam scanning angle but also derive the power combining effect with the sum (Σ) or difference (Δ) radiation patterns. The power combing effect of difference mode, which is the dual-beam pattern and the sum mode pattern, which is a 3-beam pattern, with the 3rd beam located along the middle direction (45°, 135°) of the X and Y axes. The measured scanning angle is steered over a range of 24-46° for the right beam and 127-148° for the left beam. Compared with single microstrip leaky-wave antenna, the L-shape LWAs configuration has the advantages of switchable radiation patterns as the VCO varied from 10GHz to 10.6GHz.

Keywords

active antennas; antenna radiation patterns; beam steering; high electron mobility transistors; leaky wave antennas; microstrip antennas; microwave oscillators; power combiners; varactors; voltage-controlled oscillators; 10 to 10.6 GHz; L-shape active antenna; L-shape topology; VCO frequency; antenna radiation patterns; dual-beam pattern; dual-beam scanning angle; leaky-wave antenna; microstrip antennas; power combining effect; sum mode pattern; switchable radiation patterns; varactor-tuned high-electron mobility transistor; voltage controlled oscillator; Antenna measurements; Antenna radiation patterns; Frequency; Goniometers; HEMTs; Leaky wave antennas; MODFETs; Microstrip antennas; Topology; Voltage-controlled oscillators; Leaky-wave antenna; Substrate Integrated Waveguide (SIW); transverse resonance technique;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings

Print_ISBN

0-7803-9433-X

Type

conf

DOI

10.1109/APMC.2005.1606262

Filename

1606262