Title :
Advanced Design of Planar Spiral Antenna with Novel Feeding Network
Author :
Lee, DongHyun ; Park, PilJun ; Choi, SeungWoon ; Kim, DayYoung ; Choi, Jaehoon
Author_Institution :
Hanyang Univ., Seoul
Abstract :
In this paper, a planar type four-arm rectangular spiral antenna with a novel feeding network is presented. Compared with the Archimedean and log spiral antennas, a planar spiral antenna with rectangular arms has short coming of narrow axial ratio bandwidth. To overcome this weakness, a novel feeding scheme utilizing CRLH metamaterial transmission line is proposed. The network consists of a Wilkinson power divider, metamaterial delay lines, and two half-wave baluns. The measured ´10 dB return loss´ impedance bandwidth spans over 2.43 GHz from 1.09 GHz to 3.52 GHz. An excellent axial ratio performance (<3dB) over broad band of 1.2 GHz from 1.3 to 2.5 GHz and RHCP gain of 4 dBi over all the frequency band of interest are obtained.
Keywords :
antenna feeds; baluns; electric impedance; metamaterials; planar antennas; spiral antennas; transmission lines; CRLH metamaterial transmission line; Wilkinson power divider; bandwidth 1.09 GHz to 3.52 GHz; feeding network; half-wave balun; impedance bandwidth; loss 10 dB; metamaterial delay lines; narrow axial ratio bandwidth; planar spiral antenna; Antenna feeds; Arm; Bandwidth; Delay lines; Impedance matching; Metamaterials; Planar transmission lines; Power dividers; Power transmission lines; Spirals;
Conference_Titel :
Electromagnetics in Advanced Applications, 2007. ICEAA 2007. International Conference on
Conference_Location :
Torino
Print_ISBN :
978-1-4244-0767-5
Electronic_ISBN :
978-1-4244-0767-5
DOI :
10.1109/ICEAA.2007.4387359
