Isolation Enhancement for Wideband, Circularly/Dual-Polarized, High-Density Patch Arrays Using Planar Parasitic Resonators
Zhiyuan Chen,
Mei Li,
Guo Liu,
Zhentian Wu,
Ming-Chun Tang
Affiliations
Zhiyuan Chen
Key Laboratory of Dependable Service Computing in Cyber Physical Society Ministry of Education, School of Microelectronics and Communication Engineering, Chongqing University, Chongqing, China
Key Laboratory of Dependable Service Computing in Cyber Physical Society Ministry of Education, School of Microelectronics and Communication Engineering, Chongqing University, Chongqing, China
Guo Liu
Science and Technology on Electronic Information Control Laboratory, Chengdu, China
Zhentian Wu
Key Laboratory of Dependable Service Computing in Cyber Physical Society Ministry of Education, School of Microelectronics and Communication Engineering, Chongqing University, Chongqing, China
Key Laboratory of Dependable Service Computing in Cyber Physical Society Ministry of Education, School of Microelectronics and Communication Engineering, Chongqing University, Chongqing, China
A planar double-layer hybrid decoupling structure with the polarization-insensitive characteristics is proposed as an effective isolator for wideband, circularly/dual-polarized, high-density patch arrays. The hybrid decoupling structure is composed of two types of resonators, i.e., an H-shaped structure on the lower layer and a couple of meander lines on the upper layer. By integrating the decoupling structure into the dual-polarized array and circularly polarized array, respectively, the mutual coupling between the antenna elements is significantly reduced. In detail, the isolation levels between the co-polarization (co-pol) ports in dual-polarized array are improved by ~9.40 dB and the port isolation level in circularly polarized (CP) array is improved by ~12.7 dB, while the inter-element center-to-center distances are as low as 0.5 λ0. Good agreement between the simulated results and the measured results is obtained.
