|
Description:
|
Due to the recent interest in broadband antennas a microstrip patch antenna was
developed to meet the need for a cheap , low profile , broadband antenna . This antenna
could be used in a wide range of applications such as in the communications industry for
cell phones or satellite communication . Particle Swarm Optimization was used to design
the dual -linear polarization broadband microstrip antenna and impedance matching
network . This optimization method greatly reduced the time needed to find viable
antenna parameters . A dual input patch antenna with over 30 % bandwidth in the X -band
was simulated using Ansoft's High Frequency Structural Simulator (HFSS ) in
conjunction with Particle Swarm Optimization . A single input and a dual input antenna
was then fabricated . The fabricated antennas were composed of stacked microstrip
patches over a set of bowtie apertures in the ground plane that were perpendicular to one
another . A dual offset microstrip feedline was used to feed the aperture . Two different
layers were used for the microstrip feedline of each polarization . The resulting measured
impedance bandwidth was even wider than predicted . The antenna pattern was measured
at several frequencies over the antenna bandwidth and was found to have good gain ,
consistent antenna patterns and low cross polarization . |