Enhancement of Band-Edge Gain in Radial Line Slot Antennas Using the Power Divider--A Wide-Band Radial Line Slot Antenna--

Tetsuya YAMAMOTO  Masaharu TAKAHASHI  Makoto ANDO  Naohisa GOTO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E78-B   No.3   pp.398-406
Publication Date: 1995/03/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
RLSA,  planar antenna,  hybrid structure,  power divider,  wide-band,  waveguide,  long line effect,  

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Summary: 
A Radial Line Slot Antenna (RLSA) is a planar antenna for DBS reception. It is a kind of slotted waveguide arrays. The conductor loss is so small that high efficiency is expected irrespective of the aperture diameter. On the other hand, since a RLSA utilizes the traveling waves, the frequency bandwidth is limited by the long line effect, particularly for a larger antenna. A new Wide-Band RLSA (WB-RLSA) is proposed which halves the waveguide length and widens the frequency bandwidth. This paper presents the design and experimental results of a model antenna. A gain of 33.7dBi is measured at the edge of 800MHz bandwidth and its high potential is demonstrated.