A Low-Profile, Wideband Antenna With Vertically Polarized Directional Radiation

作者：Ghaemi Kasra^*; Behdad Nader^*

来源：IEEE Antennas and Wireless Propagation Letters, 2016, 15: 1093-1096.

DOI：10.1109/LAWP.2015.2493450

• Broadband antennas
• cardioid-shaped patterns
• directional antennas
• wideband antennas

A low-profile, compact, and wideband vertically polarized antenna demonstrating directional radiation characteristics in both the azimuth and the elevation planes is presented. The antenna is composed of four bent-diamond-shaped half-loops placed on a ground plane. The half-loops are fed at their centers and short-circuited to the ground at their ends. Two of the half-loops are fed in phase, while the other two are fed with 180 degrees phase difference generating omnidirectional and figure-eight-shaped radiation patterns, respectively. Coherent combination of these radiation patterns generates a cardioid-shaped directional pattern. A prototype of the antenna was fabricated and characterized. The antenna has electrical dimensions of 0.54 lambda(min) x 0.4 lambda(min) x 0.116 lambda(min) at its lowest frequency of operation and operates over a 2:1 bandwidth.

• 出版日期2016