Summary
International Symposium on Antennas and Propagation
2009
Session Number:3A4
Session:
Number:3A4-3
Ka-band Shaped Dual Gridded Antenna for Transmit and Receive use
Hiroyuki Ohmine, Masao Yamato, Takashi Katagi,
pp.819-822
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
Ka-band shaped dual gridded antenna for both transmit and receive use with improved intercostals design has been demonstrated for broadband satellite communication. The dual gridded antenna (DGA) consists of grid front reflector, rear reflector and intercostal that support both reflectors has feature of orthogonal purity of two polarizations [1]-[2], in ka-band, however, few papers have been reported the radiation performance such as cross polarization and beam shaping. Especially careful design needs to be taken into account for the intercostal from which reflection and diffraction is larger than that in lower frequency. Further, in ka-band, since transmit and receive frequency separated as 20GHz and 30GHz band, beam performance corresponds to each frequency is fairly varied, which means that required beam performance can not be easily obtained by one feed and one reflector configuration. In this paper, shaped DGA for dual band on transmit and receive use has been designed nevertheless dual frequency is apart 40%. Also practical 2.2 meter-size DGA has been fabricated and tested in ka-band and appropriate performance has been verified thru test results.