Abstract
An approach of using the concept of CM (common mode) and DM (differential mode) to design two wideband antennas in a pair has been proposed. The two antennas in the antenna pair have wide bandwidth and high isolation, though they share the same radiator and total electric length of the antenna pair is just a half wavelength. A rigorous analysis has been presented to explain and illustrate the operating principle of the wideband antenna pair. An antenna design example operating in 5G New Radio (NR) N1, N2, N3, N7, N38 and N41 bands with frequency ranging from 1.71-2.69 GHz has been examined to demonstrate the effectiveness of the proposed approach. The simulated results, including S-parameters, antenna total efficiency and ECC (envelope correlation coefficient), are in good agreement with measured ones.
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