Design of a 1-Bit Reconfigurable Low-Profile UWB Antenna Element

Recently, reconfigurable antennas are widely used for beam forming However, it is difficult to balance broadband and low profile in the design of reconfigurable antennas. To overcome this challenge, we propose a 1-bit reconfigurable low-profile UWB antenna element in C-band. The antenna element can operate well in a wide bandwidth the relative bandwidth 33.5% (from 4.57 to 6.41 GHz) with
$\vert \mathrm{S}11\vert < -10 \quad \text{dB}$
. Besides, the phase difference between the two states is stable at
$180^{\circ}$
, and the amplitude difference is less than 0.1dB. The design achieves UWB and low-profile.