A Wideband High-Gain Dipole with Impedance and Field Control Structures

作者：Zhang, Honglin^*; Zhong, Haiquan; Ye, Jianhao; Liao, Shaowei; Li, Bing

来源：Electronics, 2022, 11(12): 1892.

DOI：10.3390/electronics11121892

• dipole
• wideband
• high-gain
• sleeve
• cavity

Dipoles are favorable in various applications because of their simple and light structure. However, narrow bandwidths and low gain values limit their usage in wideband and long-range systems. To solve this problem, this paper presents a new method to achieve wideband high-gain for dipoles with embedded double-sleeve and a bathtub-shaped cavity. The double-sleeve adjusts the dipole's impedance and enforces wideband matching from 4.8 GHz to 9.4 GHz. Furthermore, the bathtub-shaped cavity reshapes the antenna's radiation field and elevates the antenna's boresight gain to be above 10 dBi in the bandwidth of 5 GHz to 9.4 GHz, which is a 7.75 dBi improvement over the 2.15 dBi gain of conventional dipoles. The combination of the two structures creates a wideband high-gain dipole that features an average simulated boresight realized gain of 11.8 dBi in the impedance bandwidth of 64.8%. Thus, the new antenna can work efficiently in wideband and long-range systems because of its enhanced bandwidth and gain performances.

• 单位
  西南交通大学