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Compact feed circuit with quarter‐wavelength transmission line matrix controlling beams in three directions including boresight
Author(s) -
Tsuji Masatoshi
Publication year - 2010
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.10218
Subject(s) - feed line , transmission line , line (geometry) , electrical engineering , antenna (radio) , matrix (chemical analysis) , equivalent circuit , transmission (telecommunications) , wavelength , signal (programming language) , optics , engineering , electronic engineering , physics , voltage , materials science , computer science , mathematics , geometry , composite material , programming language
A compact feed circuit with a λ/4 transmission line matrix circuit for use in array antennas to control beams in three directions, including boresight, is presented. The feed circuit antenna is composed of five switches and λ/4 transmission lines, and the feeding matrix circuit yields phase differences of ±90 ° and 0 ° . The feed circuit can obtain a reliable output signal, as there is only a small degree of deviation of output signal with variations in the line width. The feed circuit is simulated, fabricated, and evaluated for the ISM band, and the measured characteristics agree well with the results of the simulation. The size of the feed circuit is 45 (H) ×48 (W) ×3 (T) mm. © 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 93(4): 10–17, 2010; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecj.10218