Title :
Design of cavity-backed spiral antennas
Author :
Seong, Cheol Min ; Park, Dong Chul
Author_Institution :
Dept. of Radio Sci. & Eng., Chungnam Nat. Univ., Daejeon, South Korea
Abstract :
In this paper, the design procedure of the 2-18 GHz and the 18-40 GHz cavity-backed spiral antenna is described. By varying the antenna parameters the VSWR and the axial ratio characteristics of the antenna are investigated. For the 2-18 GHz spiral antenna, the solid absorber and the Marchand balun are applied. The measured results of the fabricated antenna are compared with the simulated ones. For the 18-40 GHz antenna, the honeycomb absorber having variable loss tangent is considered in simulation to investigate for improvement of the VSWR and the axial ratio characteristics.
Keywords :
baluns; spiral antennas; Marchand balun; VSWR; axial ratio characteristic; cavity-backed spiral antenna; frequency 18 GHz to 40 GHz; frequency 2 GHz to 18 GHz; honeycomb absorber; solid absorber; variable loss tangent; voltage standing wave ratio; Antenna measurements; Antennas; Cavity resonators; Impedance matching; Materials; Spirals; Archimedean spiral antenna; Marchand balun; absorbing material;
Conference_Titel :
Millimeter Waves (GSMM), 2012 5th Global Symposium on
Conference_Location :
Harbin
Print_ISBN :
978-1-4673-1302-5
DOI :
10.1109/GSMM.2012.6314032
