Showing papers by "Kevin A. Morris published in 2020"
01 Mar 2020
TL;DR: In this article, a three port circular patch antenna has been designed to provide pattern and polarisation agility at an operating frequency of 2.4 GHz, where the antenna modes TMOO, TMOI and TM10 have been demonstrated and by combining these modes, beamsteering has been achieved.
Abstract: A three port circular patch antenna has been designed to provide pattern and polarisation agility at an operating frequency of 2.4 GHz. Independent excitation of the antenna modes TMOO, TMOI and TM10 has been demonstrated and, by combining these modes, beamsteering has been achieved. The improved directivity of this antenna design at low elevation angles has been confirmed through these simulations.A directivity of 2.2 dB has been achieved at the horizon through this beamsteering method compared to -8.2dB for the TMOI and TM10 modes and -0.7dB for the TMOO mode at the same angle. A discussion of the active impedance and its implications for impedance matching is also included.