A Lightweight Radial Line Slot Antenna with Honeycomb Structure for Space Use

Hideki UEDA  Jiro HIROKAWA  Makoto ANDO  Osamu AMANO  Yukio KAMATA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B   No.3   pp.871-877
Publication Date: 2008/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.3.871
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
space use,  lightweight,  honeycomb,  multi-layer,  radial line slot antenna,  

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Summary: 
A lightweight and high gain planar antenna for space use is realized with radial waveguide slotted array and honeycomb structure with the weight of 1.16 kg and the diameter of 920.5 mm. The slot coupling is analyzed by method of moments considering the hybrid mode in the multi-layer waveguide structure. The propagation constant of the honeycomb structure is measured and the low-loss property is obtained at the frequency range of 8 GHz. The fabricated RLSA is measured and the reflection is around -10 dB in 8 GHz band. The measured aperture fields agree with the calculation in the radial direction. In the azimuthal direction, on the other hand, the fields show ripples of 6 dB and 60 degree. The gain of 35.9 dBi with the efficiency of 58.7% is obtained at 8.6 GHz.