Summary
International Symposium on Antennas and Propagation
2008
Session Number:3C27
Session:
Number:3C27-2
Ka-band Dual Gridded Antenna with Improved Intercostal Design
Hiroyuki Ohmine, Michio Takikawa, Toru Takahashi, Yoshiyuki Ohkawa,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
New configuration and test results of ka-band dual gridded antenna with improved intercostals design that used for broadband satellite communication has been demonstrated. Although the dual gridded antenna has features of orthogonal purity of two polarizations [1]-[4], which consists of grid front reflector, rear reflector and intercostals that support both reflectors, the diffraction from the intercostals degrade radiation performance especially in ka-band. The specific improved intercostals design, which is thin thickness of the ring shaped intercostals surfaces compared traditional intercostals, has been introduced to reduce reflection and diffraction from the intercostals by decreasing intercostal occupation volume. Consequently, it can improve shaped beam performance even in ka-band. In order to estimate improved intercostals effectiveness, one meter-sized dual gridded antenna has been fabricated and tested in ka-band.