1. Enhanced cross-polarization isolation of loop-dipole antenna array backed by dielectric cavities for 5G base stations
- Author
-
Ahmed A. Kishk, Yiran Da, Xiaoming Chen, Mengting Li, Azremi Abdullah Al-Hadi, Zhenyuan Zhang, and Anxue Zhang
- Subjects
MIMO ,General Physics and Astronomy ,02 engineering and technology ,Dielectric ,01 natural sciences ,base station antennas ,law.invention ,decoupling ,multiple-input multiple-output ,Base station ,Antenna configuration ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Wireless ,Dipole antenna ,Electrical and Electronic Engineering ,Computer Science::Information Theory ,010302 applied physics ,Physics ,business.industry ,020206 networking & telecommunications ,wireless communication ,Electronic, Optical and Magnetic Materials ,Loop (topology) ,Optoelectronics ,mutual couplings ,business ,Decoupling (electronics) ,5G - Abstract
Various decoupling methods were proposed and investigated for multiple-input multiple-output (MIMO) Base Station (BS) systems. These methods can effectively decouple the dual-polarized co-polar signal but fail to decouple the cross-polarized signal, similarly limiting the BS's overall decoupling performance. In this paper, different antenna arrays are designed to illustrate the coupling mechanism of cross-polarized BS antennas, and a comprehensive study of the relationship between antenna configurations and mutual couplings is conducted. It is shown that compact size antenna elements enlarge the edge-to-edge separation, and the loop-shaped dipole elements reduce the cross-polarization couplings. Finally, the array-antenna decoupling surface (ADS) method is applied in a 2×2 array composed of the designed antennas. Thanks to the improved antenna unit, the decoupling task is eased, and a better decoupling performance is achieved compared with the original ADS work.
- Published
- 2021