Title :
A dual-beam micro-CPW leaky-mode antenna
Author :
Lin, Ching-Chyuan ; Tzuang, Ching-Kuang Cliver
Author_Institution :
Inst. of Electr. Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
2/1/2000 12:00:00 AM
Abstract :
A quasi-planar leaky-mode antenna employing the second higher order leaky mode of even symmetry in its leaky-wave regime has been proposed for a new antenna configuration consisting of a microstrip and a coplanar waveguide (CPW) on both sides of the substrate. The new antenna, also known as the micro-CPW antenna, is directly fed by a CPW line without matching circuit. One particular K-band antenna of 36 mm long [about 2.7 free-space wavelengths (λ0) at 22.1 GHz] shows 5.3% impedance bandwidth for VSWRs less than 2.0 for frequencies between 21.927-23.110 GHz, 11.0-dB antenna gain, and 90.02% efficiency. Detailed analyses show that the dual-beam antenna is linearly polarized along two slanted lines, which lie in the longer axes of the ellipses that approximate the radiation contours. Both theoretical and experimental data for the micro-CPW antenna agree very well for the particular design. The proposed micro-CPW antenna is suitable for active integrated antenna integration at higher microwave and millimeter-wave frequencies
Keywords :
coplanar waveguides; electromagnetic wave polarisation; leaky wave antennas; microstrip antennas; multibeam antennas; 11.0 dB; 21.927 to 23.110 GHz; 90.02 percent; CPW line; K-band; active integrated antenna integration; antenna configuration; coplanar waveguide; dual-beam micro-CPW leaky-mode antenna; efficiency; gain; micro-CPW antenna; microstrip; microwave frequencies; millimeter-wave frequencies; quasi-planar leaky-mode antenna; radiation contours; second higher order leaky mode; Antenna accessories; Bandwidth; Circuits; Coplanar waveguides; Frequency; Impedance; K-band; Microstrip antennas; Microwave antennas; Polarization;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
