H-/E-Plane Port and Radiation Pattern Decoupled Microstrip Antenna

This paper presents both H-/E-plane-placed antenna pairs with port and radiation pattern decoupling characteristics. The loaded metal strips introduce extra coupling paths, which help suppress the coupling currents on the coupled units and decouple the radiation patterns. The extra shorting wall is employed to enhance E-plane port isolation. To verify the presented decoupling method, samples are designed and fabricated. The measured port isolations of the decoupled antenna pairs are more than 18.4 dB. As the antenna pairs are decoupled, the deflection of the radiation pattern of the antenna unit is corrected, confirming the radiation pattern decoupling characteristics.