Title :
Broadband Long Rectangular Patch Antenna With High Gain and Vertical Polarization
Author :
Juhua Liu ; Quan Xue
Author_Institution :
State Key Lab. of Millimeter Waves, City Univ. of Hong Kong, Kowloon, China
Abstract :
A new microstrip rectangular patch antenna with high gain and vertically polarized radiation at endfires is proposed. The antenna has a wide bandwidth with a very low profile. Such antenna is based on a long microstrip line with periodic shorting-vias along the longitudinal direction. When both ends of the line are also shorted by vias, a resonant type of antenna is constructed. Two resonant modes with similar radiation patterns are generated. By optimizing the separation of the resonate frequencies of the two modes, a wide bandwidth is achieved. Measured results show that the antenna with a profile of 0.03 wavelengths in free space and a length of about 1.25 wavelengths can produce a bandwidth of 12.48% and a maximum gain of about 9 dBi.
Keywords :
antenna radiation patterns; broadband antennas; microstrip antennas; microstrip lines; antenna radiation patterns; broadband long rectangular patch antenna; end fires; longitudinal direction; microstrip antenna; microstrip line; periodic shorting-vias; resonate frequencies; vertical polarized radiation; Antenna radiation patterns; Bandwidth; Directive antennas; Microstrip; Microstrip antennas; Patch antennas; Gain; low profile; microstrip antenna; rectangular patch antenna; vertical polarization; wide bandwidth;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2224838
