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IEICE TRANSACTIONS on Communications

A 2-D Beam Scanning Array Antenna Fed by a Compact 16-Way 2-D Beamforming Network in Broadside Coupled Stripline

Jean TEMGA, Tomoyuki FURUICHI, Takashi SHIBA, Noriharu SUEMATSU

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Summary :

A 2-D beam scanning array antenna fed by a compact 16-way 2-D beamforming network (BFN) designed in Broadside Coupled Stripline (BCS) is addressed. The proposed 16-way 2-D BFN is formed by interconnecting two groups of 4x4 Butler Matrix (BM). Each group is composed of four compact 4x4 BMs. The critical point of the design is to propose a simple and compact 4x4 BM without crossover in BCS to achieve a better transmission coefficient of the 16-way 2-D BFN with reduced size of merely 0.8λ0×0.8λ0×0.04λ0. Moreover, the complexity of the interface connection between the 2-D BFN and the 4x4 patch array antenna is reduced by using probe feeding. The 16-way 2-D BFN is able to produce the phase shift of ±45°, and ±135° in x- and y- directions. The 2-D BFN is easily integrated under the 4x4 patch array to form a 2-D phased array capable of switching 16 beams in both elevation and azimuth directions. The area of the proposed 2-D beam scanning array antenna module has been significantly reduced to 2λ0×2λ0×0.04λ0. A prototype operating in the frequency range of 4-6GHz is fabricated and measured to validate the concept. The measurement results agree well with the simulations.

Publication
IEICE TRANSACTIONS on Communications Vol.E106-B No.9 pp.768-777
Publication Date
2023/09/01
Publicized
2023/03/28
Online ISSN
1745-1345
DOI
10.1587/transcom.2022FGP0003
Type of Manuscript
Special Section PAPER (Special Section on Technologies and Proof-of-Concept Activities for 5G Advanced and 6G)
Category

Authors

Jean TEMGA
  Tohoku University
Tomoyuki FURUICHI
  Tohoku University
Takashi SHIBA
  Tohoku University
Noriharu SUEMATSU
  Tohoku University

Keyword