TY - GEN

T1 - Design of planar 8-by-16 butler matrix for 16-element switch-beam antenna array

AU - Tseng, Chao Hsiung

AU - Huang, Jheng Yuan

AU - Tseng, Chun Hao

N1 - Publisher Copyright:
© 2018 IEICE

PY - 2018/7/2

Y1 - 2018/7/2

N2 - In this paper, a planar 8×16 Butler matrix is designed using microstrip technology to build up a 16-element switched-beam antenna array. By connecting 180° hybrid couplers with 8 output ports of the conventional 8×8 Butler matrix, each original output is split into two ports with an equal power division and a 180° phase difference. Hence, the outputs of the Butler matrix can be expanded to 16 outputs. As the developed matrix is integrated with 16 microstrip antenna elements, one can form a 16-element switch-beam antenna array with 8 switched beams pointing to 8 different azimuth angles. The measured radiation patterns of the developed antenna array demonstrate that the main-beam directions point to azimuth angles of -47, -33, -19, -4, 5, 17, 30, and 46 at 9.4 GHz and agree the theoretical results very well.

AB - In this paper, a planar 8×16 Butler matrix is designed using microstrip technology to build up a 16-element switched-beam antenna array. By connecting 180° hybrid couplers with 8 output ports of the conventional 8×8 Butler matrix, each original output is split into two ports with an equal power division and a 180° phase difference. Hence, the outputs of the Butler matrix can be expanded to 16 outputs. As the developed matrix is integrated with 16 microstrip antenna elements, one can form a 16-element switch-beam antenna array with 8 switched beams pointing to 8 different azimuth angles. The measured radiation patterns of the developed antenna array demonstrate that the main-beam directions point to azimuth angles of -47, -33, -19, -4, 5, 17, 30, and 46 at 9.4 GHz and agree the theoretical results very well.

KW - Antenna arrays

KW - Beamforming antenna arry

KW - Butler matrix

KW - Microstrip antennas

KW - Switched-beam antenna array

UR - http://www.scopus.com/inward/record.url?scp=85061831329&partnerID=8YFLogxK

U2 - 10.23919/APMC.2018.8617645

DO - 10.23919/APMC.2018.8617645

M3 - Conference contribution

AN - SCOPUS:85061831329

T3 - Asia-Pacific Microwave Conference Proceedings, APMC

SP - 1534

EP - 1536

BT - 2018 Asia-Pacific Microwave Conference, APMC 2018 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 30th Asia-Pacific Microwave Conference, APMC 2018

Y2 - 6 November 2018 through 9 November 2018

ER -