DocumentCode :
1726074
Title :
Pattern synthesis of an array antenna with maximum directivity and s at specified directions
Author :
Kagoshima, Kenichi ; Obote, Shigeki ; Ichikawa, Yoshihiro ; Yamane, Masahiro ; Tanaka, Takayuki
Author_Institution :
Dept. of Media & Telecommun. Eng., Ibaraki Univ., Japan
fYear :
2005
Firstpage :
18
Lastpage :
22
Abstract :
In order to solve a problem of maximizing a directivity of a transmitting array antenna with s at specified directions, we intended to utilize an adaptive antenna algorithm which enables the SNR to be maximum under the incidence of interferences. However, we encountered the discrepancy between transmitting antenna patterns and receiving ones. We investigated why this discrepancy arises, although a reciprocity theorem is effective between the transmitting pattern and the receiving one. Through these investigations, we derived the equation which determines the matched load impedances of the array elements and solved it numerically up to five elements. We also derived an equation to evaluate output voltages which are summed up into an output of the array and confirmed the coincidence between the transmitting pattern and the receiving one.
Keywords :
adaptive antenna arrays; antenna radiation patterns; transmitting antennas; adaptive antenna algorithm; antenna pattern synthesis; interference; matched impedance; matched load impedance; maximum directivity; mutual coupling; receiving antenna patterns; reciprocity theorem; transmitting antenna patterns; transmitting array antenna; Antenna arrays; Current distribution; Directive antennas; Equations; Feeds; Moment methods; Null value; Receiving antennas; Transmitting antennas; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antenna Theory and Techniques, 2005. 5th International Conference on
Print_ISBN :
0-7803-9261-2
Type :
conf
DOI :
10.1109/ICATT.2005.1496876
Filename :
1496876
Link To Document :
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