Title :
Finite-volume time-domain analysis of a cavity-backed Archimedean spiral antenna
Author :
Fumeaux, Christophe ; Baumann, Dirk ; Vahldieck, Rüdiger
Author_Institution :
Lab. for Electromagn. Fields & Microwave Electron., Zurich
fDate :
3/1/2006 12:00:00 AM
Abstract :
This paper presents a comprehensive analysis of a broadband (2-18 GHz) cavity-backed Archimedean spiral antenna. The simulation of the device is performed using the finite-volume time-domain method. The high geometrical flexibility of this method permits a detailed modeling of the antenna including the thin substrate, the feeding balun, and the cavity loaded with a honeycomb absorber. The simulated far-field radiation patterns and the return loss are compared to measurements, showing an excellent agreement over the whole frequency band. The radiation mechanism of the spiral is visualized by observing the current distribution on the spiral arms for both pulsed and harmonic excitation modes
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; baluns; broadband antennas; current distribution; finite volume methods; honeycomb structures; microwave antennas; spiral antennas; time-domain analysis; 2 to 18 GHz; broadband antenna; cavity-backed Archimedean spiral antenna; current distribution; far-field radiation pattern; feeding balun; finite-volume time-domain analysis; harmonic excitation mode; honeycomb absorber; pulse excitation mode; thin substrate; Antenna feeds; Antenna measurements; Antenna radiation patterns; Broadband antennas; Frequency measurement; Impedance matching; Loaded antennas; Solid modeling; Spirals; Time domain analysis; Current distribution; spiral antennas; time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2006.869935
