A Wideband Colinearly Polarized Composite Antenna With High Isolation

作者：Gao, Ruo Bin; Nie, Li Ying^*; Cheng, Fei; Jiang, Zhao Neng; Zhang, Xiao Hui; Xiang, Shang

来源：IEEE Antennas and Wireless Propagation Letters, 2024, 23(1): 419-423.

DOI：10.1109/LAWP.2023.3326542

• Antenna measurements
• Dipole antennas
• Gain
• Antenna arrays
• Scattering parameters
• Frequency measurement
• Antennas
• Composite
• copolarized
• high isolation
• multiple-input-multiple-output (MIMO)

In this paper, a high-isolation two-port co-linearly polarized (co-LP) composite antenna is proposed. Dipole and W8JK array modes with co-LP omnidirectional patterns can be simultaneously supported by a plate with two etched back-to-back tapered slots. A microstrip differential and a T-divider coupling feeding networks are developed to selectively excite the dipole and W8JK modes, which results in high isolation and low correlation between two co-LP ports without using any decoupling structures. Reflecting ground is applied to realize the directional radiation. Measurement results show that the overlapped operating band of the antenna can cover 3.4-4.1 GHz with low measured envelope correlation coefficients (< 2.5 x 10(-3)) and high isolation (> 20 dB). A dual-polarized four-port element with good performances can be easily obtained based on the proposed co-LP antenna. The simulated results of the four-port prototype indicate that the proposed antenna is a promising candidate for the future compact massive MIMO array antenna.

• 单位
  四川大学