Summary
International Symposium on Antennas and Propagation
2006
Session Number:2POS
Session:
Number:2POS-13
Post-wall waveguide slot arrays with water repellent coating and estimation of effective dielectric constant of wall-thickness region
Taro Yaguchi, Jiro Hirokawa, Makoto Ando,
pp.1-4
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
We evaluate the coating of water repellent over a post-wall waveguide-fed parallel plate slot antenna. The slot array is originally designed for uniform field distribution for the dielectric constant to be 1.0 in the wall thickness region. After the coating, water repellent is filled in the wall thickness region in part, so that the dielectric constant in the wall thickness region is equivalently changed and the field distribution of the slot array should be tapered. The equivalent dielectric constant is evaluated by measuring the tapered field distribution. Then we redesign the slot array for uniform excitation by including the equivalent dielectric constant.