A Circularly Polarized Broadband Rhombic Loop Antenna
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概要
- 論文の詳細を見る
A broadband rhombic loop antenna is introduced to radiate a circularly polarized wave. This antenna has a single feed and is located above a ground plane. The perimeter of the loop is typically about 1.3 wavelength. One gap is made on the loop to produce a traveling wave distribution of current. Antenna characteristics are calculated by the method of moments and compared with the measured data. By adjusting a perimeter and a gap position of the loop, circular polarization is obtained. In addition, with the appropriate vertex angle of the rhombus, the bandwidth of about 20% for the axial ratio(≤2dB) is attained and the possibility of controlling the input impedance is found. Finally, it is observed that the sense of circular polarization can be changed easily from left-hand to right-hand, and vice versa by switching one gap position to the other on the rhombic loop.
- 一般社団法人電子情報通信学会の論文
- 1996-06-25
著者
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Morishita Hisashi
The Department Of Communications Engineering National Defense Academy
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Hirasawa Kazuhiro
The Institute Of Information Science And Electronics University Of Tsukuba
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NAGAO Tsukasa
the Dept. of Electrical and Engineering, National Defense Academy
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Nagao Tsukasa
The Dept. Of Electrical And Engineering National Defense Academy
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- A Circularly Polarized Broadband Rhombic Loop Antenna