Abstract
A novel miscrostrip line antenna consisting of loop radiation cells is analyzed using the method of moments. First, an open-loop line antenna is analyzed as a reference antenna. The analysis shows that, as the number of radiation cells is decreased, the reflected current increases to deteriorate the axial ratio. Next, a closed-loop line antenna is proposed. The antenna is characterized by its radiation mechanism where both the traveling and reflected currents contribute to the radiation of the same rotational sense of circular polarization. The number of the radiation cells is chosen to be four, where the reference antenna cannot radiate a CP wave. It is found that the antenna radiates a CP wave with an axial ratio of less than 3 dB in a frequency bandwidth of 3%, where the gain is approximately 15 dBi. These bandwidth and gain are also found to be comparable to those of a conventional array composed of four loop antennas.
| Original language | English |
|---|---|
| Pages (from-to) | 11-19 |
| Number of pages | 9 |
| Journal | Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) |
| Volume | 86 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2003 Nov |
| Externally published | Yes |
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Keywords
- Circularly polarized antenna
- Loop antenna
- Microstrip line antenna
- Moment method
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Networks and Communications
Cite this
Circularly polarized loop-line antennas. / Hirose, Kazuhide; Sakurai, Kenya; Nakano, Hisamatsu.
In: Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi), Vol. 86, No. 11, 11.2003, p. 11-19.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Circularly polarized loop-line antennas
AU - Hirose, Kazuhide
AU - Sakurai, Kenya
AU - Nakano, Hisamatsu
PY - 2003/11
Y1 - 2003/11
N2 - A novel miscrostrip line antenna consisting of loop radiation cells is analyzed using the method of moments. First, an open-loop line antenna is analyzed as a reference antenna. The analysis shows that, as the number of radiation cells is decreased, the reflected current increases to deteriorate the axial ratio. Next, a closed-loop line antenna is proposed. The antenna is characterized by its radiation mechanism where both the traveling and reflected currents contribute to the radiation of the same rotational sense of circular polarization. The number of the radiation cells is chosen to be four, where the reference antenna cannot radiate a CP wave. It is found that the antenna radiates a CP wave with an axial ratio of less than 3 dB in a frequency bandwidth of 3%, where the gain is approximately 15 dBi. These bandwidth and gain are also found to be comparable to those of a conventional array composed of four loop antennas.
AB - A novel miscrostrip line antenna consisting of loop radiation cells is analyzed using the method of moments. First, an open-loop line antenna is analyzed as a reference antenna. The analysis shows that, as the number of radiation cells is decreased, the reflected current increases to deteriorate the axial ratio. Next, a closed-loop line antenna is proposed. The antenna is characterized by its radiation mechanism where both the traveling and reflected currents contribute to the radiation of the same rotational sense of circular polarization. The number of the radiation cells is chosen to be four, where the reference antenna cannot radiate a CP wave. It is found that the antenna radiates a CP wave with an axial ratio of less than 3 dB in a frequency bandwidth of 3%, where the gain is approximately 15 dBi. These bandwidth and gain are also found to be comparable to those of a conventional array composed of four loop antennas.
KW - Circularly polarized antenna
KW - Loop antenna
KW - Microstrip line antenna
KW - Moment method
UR - http://www.scopus.com/inward/record.url?scp=0038040757&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038040757&partnerID=8YFLogxK
U2 - 10.1002/ecja.10122
DO - 10.1002/ecja.10122
M3 - Article
VL - 86
SP - 11
EP - 19
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 - 11
ER -