Abstract
Two types of microstrip line antennas made of loop elements are treated and a basic study of dual circular polarizations is performed. The analytical values obtained by the method of moments are used for the study. Dual polarizations are attempted with an antenna combining two conventional series loop-line antennas. Unwanted radiation near an elevation angle of 0° in the radiation pattern is recognized. The radiated field is separated into emissions from various parts of the antenna. The study results indicate that the radiation from the loop elements is weak. Next, based on the study results, a parallel loop-line antenna is proposed. After a design method for the antenna is presented, the dual polarization characteristics are demonstrated. In comparison with the case of a series loop-line antenna, the unwanted radiation at an elevation angle of 0° is decreased from -9 dB to -18 dB. Finally, the frequency characteristics of the parallel loop-line antenna are studied. It is shown that a circular polarization with an axial ratio of less than 3 dB can be obtained over a bandwidth of 1%.
| Original language | English |
|---|---|
| Pages (from-to) | 9-18 |
| Number of pages | 10 |
| Journal | Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) |
| Volume | 88 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2005 Sep |
| Externally published | Yes |
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Keywords
- Circular dual polarization antenna
- Circularly polarized antenna
- Method of moments
- Microstrip line antenna
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Networks and Communications
Cite this
Circularly polarized loop-line antennas : Fundamental study on dual polarization. / Hirose, Kazuhide; Kanazawa, Hiroyuki; Nakano, Hisamatsu.
In: Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi), Vol. 88, No. 9, 09.2005, p. 9-18.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Circularly polarized loop-line antennas
T2 - Fundamental study on dual polarization
AU - Hirose, Kazuhide
AU - Kanazawa, Hiroyuki
AU - Nakano, Hisamatsu
PY - 2005/9
Y1 - 2005/9
N2 - Two types of microstrip line antennas made of loop elements are treated and a basic study of dual circular polarizations is performed. The analytical values obtained by the method of moments are used for the study. Dual polarizations are attempted with an antenna combining two conventional series loop-line antennas. Unwanted radiation near an elevation angle of 0° in the radiation pattern is recognized. The radiated field is separated into emissions from various parts of the antenna. The study results indicate that the radiation from the loop elements is weak. Next, based on the study results, a parallel loop-line antenna is proposed. After a design method for the antenna is presented, the dual polarization characteristics are demonstrated. In comparison with the case of a series loop-line antenna, the unwanted radiation at an elevation angle of 0° is decreased from -9 dB to -18 dB. Finally, the frequency characteristics of the parallel loop-line antenna are studied. It is shown that a circular polarization with an axial ratio of less than 3 dB can be obtained over a bandwidth of 1%.
AB - Two types of microstrip line antennas made of loop elements are treated and a basic study of dual circular polarizations is performed. The analytical values obtained by the method of moments are used for the study. Dual polarizations are attempted with an antenna combining two conventional series loop-line antennas. Unwanted radiation near an elevation angle of 0° in the radiation pattern is recognized. The radiated field is separated into emissions from various parts of the antenna. The study results indicate that the radiation from the loop elements is weak. Next, based on the study results, a parallel loop-line antenna is proposed. After a design method for the antenna is presented, the dual polarization characteristics are demonstrated. In comparison with the case of a series loop-line antenna, the unwanted radiation at an elevation angle of 0° is decreased from -9 dB to -18 dB. Finally, the frequency characteristics of the parallel loop-line antenna are studied. It is shown that a circular polarization with an axial ratio of less than 3 dB can be obtained over a bandwidth of 1%.
KW - Circular dual polarization antenna
KW - Circularly polarized antenna
KW - Method of moments
KW - Microstrip line antenna
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UR - http://www.scopus.com/inward/citedby.url?scp=18844415137&partnerID=8YFLogxK
U2 - 10.1002/ecja.20219
DO - 10.1002/ecja.20219
M3 - Article
VL - 88
SP - 9
EP - 18
JO - Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
JF - Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
SN - 8756-6621
IS - 9
ER -