Title :
Fundamental study on curved folded dipole antenna
Author :
Nakao, Takuma ; Hung, Nguyen Tuan ; Nagatoshi, Mio ; Morishita, Hisashi
Author_Institution :
Dept. of Electr. & Electron. Eng., Nat. Defense Acad., Yokosuka, Japan
Abstract :
As a fundamental study of the helmet antenna for disasters operated at 150 MHz, a circular planar folded dipole antenna has been examined. To begin with the helmet antenna structure is constituted by bending a dipole antenna into the shape of the circle on the plane for simplicity. As a result, it is made clear that adjusting the impedance of the helmet antenna is possible by changing the distance of the antenna tip since the impedance transformation of the dipole antenna can easily be achieved. In addition, it is confirmed that the resonant frequency can be lowered by adjusting the antenna elements on the limited circular plane[1][2].
Keywords :
dipole antennas; disasters; antenna elements; antenna tip; circular planar folded dipole antenna; circular plane; curved folded dipole antenna; dipole antenna; disasters; frequency 150 MHz; fundamental study; helmet antenna structure; impedance transformation; resonant frequency; Antenna feeds; Antenna radiation patterns; Dielectrics; Dipole antennas; Impedance; Resonant frequency;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6349370
