Title :
Wideband cavity backed spiral antenna for stepped frequency ground penetrating radar
Author :
Thaysen, J. ; Jakobsen, K.B. ; Lenler-Eriksen, H.-R.
Author_Institution :
Nokia Denmark, Copenhagen
Abstract :
A 1.7 turn cavity backed coplanar waveguide to coplanar strip-fed logarithmic uniplanar spiral antenna is presented and compared to a 1.5 turn spiral antenna. The 1.7 turn spiral antenna has a wide beamwidth, are circular polarised and has a bandwidth with a return loss better than 6 dB in the frequency band from 0.25 GHz to 4.5 GHz (18:1). The antenna is useful for ground penetrating radar (GPR)
Keywords :
antenna feeds; broadband antennas; coplanar waveguides; electromagnetic wave polarisation; ground penetrating radar; radar antennas; spiral antennas; waveguide antennas; 0.25 to 4.5 GHz; GPR; cavity backed coplanar waveguide; coplanar strip-fed antenna; logarithmic uniplanar spiral antenna; stepped frequency ground penetrating radar; wide beamwidth; wideband cavity backed spiral antenna; Bandwidth; Broadband antennas; Directive antennas; Frequency; Ground penetrating radar; Impedance matching; Polarization; Radar antennas; Radar detection; Spirals; Circular polarised antenna; Ground Penetrating Radar (GPR); Wideband balun;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1551581
