Aperture coupled, differentially fed DRAs

Antennas with differential signaling is of interest due to their inherent common mode noise rejection ability and their compatibility with existing differential circuits. To our knowledge, very little works have been done to exploit these intrinsic benefits in DRA structures. In this paper, a simple differential scheme based on the aperture coupling technique is shown to be suitable for coupling energy into the DRA. As the feeding method and the antenna structure are de-coupled from each other via the ground plane, this method also allow the differential circuit to coupled energy directly into an as-symmetrical antenna; such as a quarter-wave DRA. The reduction in size makes the proposed compact differential DRA extremely appealing for mobile applications. Simulation and experimental data will be presented to validate the proposed DRA designs.