Title :
Modified Compact Antipodal Vivaldi Antenna for 4–50-GHz UWB Application
Author :
Bai, Jian ; Shi, Shouyuan ; Prather, Dennis W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE, USA
fDate :
4/1/2011 12:00:00 AM
Abstract :
A novel way capable of improving low-frequency performance of Vivaldi antennas is presented in this paper. Traditional Vivaldi antennas are modified via introducing the loading structure, i.e., circular-shape-load or slot-load, to match the termination. This modified antenna has been demonstrated to have the impedance bandwidth of over 25:1. It also exhibits symmetric radiation patterns in both the E- and H-plane in addition to the gain varying from 3 to 12 dBi in the measurement bandwidth of 4-50 GHz.
Keywords :
antenna radiation patterns; microwave antennas; millimetre wave antennas; ultra wideband antennas; UWB application; circular-shape-load; frequency 4 GHz to 50 GHz; impedance bandwidth; low-frequency performance; modified compact antipodal Vivaldi antenna; slot-load; symmetric radiation patterns; Antenna measurements; Antenna radiation patterns; Bandwidth; Impedance; Microstrip; Slot antennas; Vivaldi antennas; RF photonics; Vivaldi antenna; ultra-wideband (UWB);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2011.2113970
