Proposal for a Slot Pair Array Having an Invariant Main Beam Direction with a Cosecant Radiation Pattern Using a Post-Wall Waveguide

Takeshi OHNO  Koichi OGAWA  Toshihiro TERAOKA  Jiro HIROKAWA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.2   pp.176-183
Publication Date: 2003/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Circuit and Device Technology for High-Speed Wireless Communication)
Category: Antenna (Slot)
Keyword: 
FWA,  main beam direction,  traveling wave,  cosecant radiation pattern,  Talor radiation pattern,  

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Summary: 
A slot pair array using a post-wall waveguide is a promising candidate for a Fixed Wireless Access (FWA) sector antenna to be used in a base station. This array is formed by a traveling wave antenna, and therefore its main beam direction varies with frequency. To overcome this difficulty, we propose a new structure that comprises of a cosecant array and an additional Talor array. This structure can fix the main beam in a constant direction whilst maintaining a cosecant radiation pattern. We conducted an investigation based on an array factor, and the validity of the method was confirmed by experiment.