Summary
International Symposium on Antennas and Propagation
2008
Session Number:3C22
Session:
Number:3C22-4
Slotted Conductor-Backed Coplanar Waveguide Antennas
Lieh-Chuan Lin, Yi-Shyang Cheng, Ruey Bing Hwang, Toshihide Kitazawa, Yu-De Lin,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Conductor-backed coplanar waveguide (CBCPWs) is a commonly used waveguide structure in planar printed circuits. It was found out that CBCPW always leaks power in a surfacewave form of the background parallel-plate mode [1]-[3], since the phase constant of the guided CBCPW mode is always less than that of the background parallel-plate mode. In waveguide applications, this surface-wave leakage will cause power loss and coupling between neighboring lines, and should be avoided in the operating frequency band using various mode-suppression schemes [4]-[5]. However, in antenna applications, we can place radiating slots on the top conductor or the bottom conductor [6] along the propagation direction of the parallel-plate surfacewave, resulting in a slotted antenna array structure similar to the slotted waveguide antennas in [7] or the radial line slot antenna in [8]. In this paper, we have designed a novel fan-shaped slotted CBCPW antenna operating in Ku band. Its center frequency is 12 GHz and can be used in direct broadcast satellite (DBS) systems.