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A Suspended Stripline Fed Dual-Polarized Open-Ended Waveguide Subarray with Metal Posts for Phased Array Antennas

Narihiro NAKAMOTO, Toru TAKAHASHI, Toru FUKASAWA, Naofumi YONEDA, Hiroaki MIYASHITA

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Summary :

This paper proposes a dual linear-polarized open-ended waveguide subarray designed for use in phased array antennas. The proposed subarray is a one-dimensional linear array that consists of open-ended waveguide antenna elements and suspended stripline feed networks to realize vertical and horizontal polarizations. The antenna includes a novel suspended stripline-to-waveguide transition that combines double- and quad-ridge waveguides to minimize the size of the transition and enhance the port isolation. Metal posts are installed on the waveguide apertures to eliminate scan-blindness. Prototype subarrays are fabricated and tested in an array of 16 subarrays. The experimental tests and numerical simulations indicate that the prototype subarray offers a low reflection coefficient of less than -11.4dB, low cross-polarization of less than -26dB, and antenna efficiency above 69% in the frequency bandwidth of 14%.

Publication
IEICE TRANSACTIONS on Communications Vol.E104-B No.3 pp.295-303
Publication Date
2021/03/01
Publicized
2020/09/09
Online ISSN
1745-1345
DOI
10.1587/transcom.2020EBP3067
Type of Manuscript
PAPER
Category
Antennas and Propagation

Authors

Narihiro NAKAMOTO
  Mitsubishi Electric Corporation
Toru TAKAHASHI
  Mitsubishi Electric Corporation
Toru FUKASAWA
  Mitsubishi Electric Corporation
Naofumi YONEDA
  Mitsubishi Electric Corporation
Hiroaki MIYASHITA
  Mitsubishi Electric Corporation

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