Two-Way Power Divider for Partially Parallel Feed in Single-Layer Slotted Waveguide Arrays

Kenji FUKAZAWA  Jiro HIROKAWA  Makoto ANDO  Naohisa GOTO  

IEICE TRANSACTIONS on Communications   Vol.E81-B   No.6   pp.1248-1254
Publication Date: 1998/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
slotted waveguide array,  power divider,  feed circuit,  τ-junction,  

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The authors propose a novel waveguide two-way power divider, named as τ-junction, in a feed waveguide of a single-layer slotted waveguide array antenna. This junction occupies only a small space and is placed in the middle of a cascade of several power dividers. It suppresses the long line effect and widens the bandwidth of the feed waveguide. The junction has two inductive walls; one is for suppressing the reflection and the other is for controlling the ratio of divided power to the two output ports. Analysis using Galerkin's method of moments is verified by experiments of a 4 GHz-band model. We install the junctions in a 12 GHz-band single-layer slotted waveguide array. The gain reduction at the band-edge is suppressed.