Title :
Design of a combined antenna for ultra wide-band high-power applications
Author :
Mehrdadian, Ali ; Forooraghi, K.
Author_Institution :
Microwave Lab., Tarbiat Modares Univ., Tehran, Iran
Abstract :
In this paper, design and simulation of a combined antenna for wideband applications with high radiating power is presented. By using the idea of combined antennas, a TEM horn antenna is combined with magnetic dipoles in order to shift the bandwidth to lower frequencies. Furthermore, a feeding structure which is a transition between coaxial cable to the microstrip line is suggested to increase the antenna bandwidth. The obtained 10 dB impedance bandwidth is from 0.2 to 30 GHz. Radiation patterns at different frequencies, antenna gain and return loss versus frequency are presented. CST software package which is based on finite integral technique is used for the simulations.
Keywords :
UHF antennas; antenna radiation patterns; coaxial cables; dipole antennas; electric impedance; horn antennas; magnetic moments; microstrip antennas; ultra wideband antennas; CST software package; TEM horn antenna; antenna bandwidth; antenna gain; bandwidth 0.2 GHz to 30 GHz; coaxial cable; combined antenna design; feeding structure; finite integral technique; high radiating power; impedance bandwidth; magnetic dipoles; microstrip line; radiation pattern; return loss; ultra wideband high-power application; Broadband antennas; Dipole antennas; Horn antennas; Impedance matching; Magnetic resonance imaging; Microstrip antennas; TEM horn antenna; combined antenna; electric and magnetic energy; microstrip line; reactive energy;
Conference_Titel :
Telecommunications (IST), 2012 Sixth International Symposium on
Conference_Location :
Tehran
Print_ISBN :
978-1-4673-2072-6
DOI :
10.1109/ISTEL.2012.6482965
