Design of a Compact, Wideband, Bidirectional Antenna Using Index-Gradient Patches

作者：Li, Mei^*; Zhang, Yiman; Tang, Ming-Chun

来源：IEEE Antennas and Wireless Propagation Letters, 2018, 17(7): 1218-1222.

DOI：10.1109/LAWP.2018.2839900

• Broadband antenna
• dipole
• endfire antennas
• index-gradient patches
• surface-wave (SW) antenna

A planar, compact, wideband, bidirectional antenna based on the index-gradient patches is proposed. In this design, a printed dipole is utilized as the launcher element, and a metasurface containing both linearly index-modulated patches and index-fixed patches is employed for both bandwidth enhancement and gain improvement. The overall dimensions are 1.35 lambda(0) x 0.79 lambda(0) x 0.01 lambda(0), where lambda(0) corresponds to the center frequency f(0) = 3.75 GHz within the entire operation bandwidth from 1.85 to 5.65 GHz. Simulated results, verified by the measured values, show that the proposed metasurface-based antenna maintains stable bidirectional endfire radiation performance with the maximum gain of 7.32 dBi over an ultrabroad bandwidth as high as 101.3%, which would be quite suitable for the applications in the wireless coverage in long and narrow path service areas.

• 出版日期2018-7
• 单位重庆大学