Title :
Optimum Focal Point of a Paraboloidal Reflector Antenna With an Omnidirectional Radiative Source
Author :
Huicheol Chin ; Jae-Hyun Yeom ; Jiheon Ryu ; Hyo-Tae Kim ; Kyung-Tae Kim
Author_Institution :
Dept. of Electr. Eng., POSTECH, Pohang, South Korea
Abstract :
A paraboloidal reflector antenna is useful for enhancing the directivity of a feed antenna with a low directivity. In this letter, we investigate a paraboloidal reflector antenna that has an ultrawideband (UWB) omnidirectional radiative source as the focal feed. To obtain the optimized focal length f for a given diameter D of the paraboloidal reflector antenna, we employ a simple relation between f and D, which can reduce the spreading loss of the source field while maintaining the aperture field uniformity. Simulation results show that the f values obtained from the above relation can maximize the far voltage-a well-known figure of merit for UWB applications.
Keywords :
aperture antennas; directive antennas; parabolic equations; reflector antenna feeds; ultra wideband antennas; UWB; aperture field uniformity maintenance; far voltage maximization; feed antenna directivity enhancement; focal length optimization; optimum focal point; paraboloidal reflector antenna; source field spreading loss reduction; ultrawideband omnidirectional radiative source; Antenna feeds; Apertures; Electric fields; Radio frequency; Reflector antennas; Time-domain analysis; Electromagnetic pulse (EMP); far voltage; integrated antenna-source (IAS) system; time domain; ultrawideband (UWB);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2275694
