A Radial Line Slot Antenna with an Expanded Polyethylene Slow Wave Structure

Hirofumi MORIYAMA  Junichi TAKADA  Makoto ANDO  Naohisa GOTO  

IEICE TRANSACTIONS (1976-1990)   Vol.E71   No.10   pp.968-971
Publication Date: 1988/10/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: LETTER
Category: Antennas and Propagation

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A Radial Line Slot Antenna (RLSA) is a high gain planar antenna for receiving DBS (satellite TV) in 12 GHz band. To suppress grating lobes from the array, a slow wave structure is installed in the upper waveguide of RLSA. This letter proposes a novel slow wave structure filled up with expanded polyethylene. The basic design and the performances of the antenna are summarized. The measured gain of 36.3 dBi and efficiency of 75% at 12 GHz confirms the potential of this slow wave structure.