Title :
Leaky wave antenna based on asymmetric NRD guide
Author :
Lee, M.T. ; Luk, K.M. ; Xu, S.J.
Author_Institution :
Dept. of Electron. Eng., Univ. of Sci. & Technol. of China, Hefei, China
Abstract :
A leaky wave antenna using an asymmetric image nonradiative dielectric (NRD) guide is proposed. When compared with the leaky wave antenna using an ordinary image NRD guide, the impedance bandwidth has increased more than three times. Moreover, by using a staircase dielectric strip, the gain bandwidth can be increased from 0.8% to 2.2%. For further improvement, bent metal plates can be applied instead of vertical metal plates to obtain a 2.7% gain bandwidth. Stable radiation patterns are observed across the operating frequency range.
Keywords :
antenna radiation patterns; leaky wave antennas; millimetre wave antennas; nonradiative dielectric waveguides; waveguide antennas; 13.5 to 15.9 GHz; asymmetric NRD guide; asymmetric image nonradiative dielectric guide; bent metal plates; gain bandwidth; impedance bandwidth; leaky wave antenna; stable radiation patterns; staircase dielectric strip; vertical metal plates; Antenna measurements; Bandwidth; Dielectric substrates; Directive antennas; Gain measurement; Impedance; Information science; Leaky wave antennas; Partial response channels; Propagation losses;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2000. IEEE
Conference_Location :
Salt Lake City, UT, USA
Print_ISBN :
0-7803-6369-8
DOI :
10.1109/APS.2000.875295
