Mofolo, ROMLysko, Albert AOlwal, TOClarke, WA2011-11-182011-11-182011-09Mofolo, R.O.M. et al. 2011. Beam steering for circular switched parasitic arrays using a combinational approach. IEEE Africon 2011, Livingstone, Zambia, 13-15 September 20117283http://hdl.handle.net/10204/5318IEEE Africon 2011, Livingstone, Zambia, 13-15 September 2011In this paper, the authors present a method of electronic beam steering for circular switched parasitic array (SPA) antennas. In circular SPA antennas, one achieves azimuth beam steering by open-circuiting and short-circuiting different parasitic elements, usually with only one parasitic element open-circuited at a time. For the SPA antenna with few parasitic elements, this results in low azimuth beam steering resolution. In the proposed method, the authors iterate through different combinations of parasitic elements and the possible switch states of the lumped impedance loads connected to the parasitic elements. Their method aims to increase the azimuth beam steering resolution of the circular SPA antennas. The method is verified using a combination of simulation (using both MATLAB and WIPL-D) and a SPA antenna prototype implementation. The MATLAB code uses the induced EMF method, while the WIPL-D uses the Methods of Moment (MoM) for solving the antenna impedances. The three sets of results (simulations and measurement) match very well at 2.4 GHz. The results indicate the availability of more options (different loading configurations) for electronic beam switching that can be adopted to improve the beam steering resolution of circular SPA antennas.enElectronic beam steeringAntenna radiation patternsCircular switched parasitic arraysMethod of momentsInduced EMF methodIEEE Africon 2011Conference PresentationMofolo, R., Lysko, A. A., Olwal, T., & Clarke, W. (2011). Beam steering for circular switched parasitic arrays using a combinational approach. IEEE Africon 2011. http://hdl.handle.net/10204/5318Mofolo, ROM, Albert A Lysko, TO Olwal, and WA Clarke. "Beam steering for circular switched parasitic arrays using a combinational approach." (2011): http://hdl.handle.net/10204/5318Mofolo R, Lysko AA, Olwal T, Clarke W, Beam steering for circular switched parasitic arrays using a combinational approach; IEEE Africon 2011; 2011. http://hdl.handle.net/10204/5318 .TY - Conference Presentation AU - Mofolo, ROM AU - Lysko, Albert A AU - Olwal, TO AU - Clarke, WA AB - In this paper, the authors present a method of electronic beam steering for circular switched parasitic array (SPA) antennas. In circular SPA antennas, one achieves azimuth beam steering by open-circuiting and short-circuiting different parasitic elements, usually with only one parasitic element open-circuited at a time. For the SPA antenna with few parasitic elements, this results in low azimuth beam steering resolution. In the proposed method, the authors iterate through different combinations of parasitic elements and the possible switch states of the lumped impedance loads connected to the parasitic elements. Their method aims to increase the azimuth beam steering resolution of the circular SPA antennas. The method is verified using a combination of simulation (using both MATLAB and WIPL-D) and a SPA antenna prototype implementation. The MATLAB code uses the induced EMF method, while the WIPL-D uses the Methods of Moment (MoM) for solving the antenna impedances. The three sets of results (simulations and measurement) match very well at 2.4 GHz. The results indicate the availability of more options (different loading configurations) for electronic beam switching that can be adopted to improve the beam steering resolution of circular SPA antennas. DA - 2011-09 DB - ResearchSpace DP - CSIR KW - Electronic beam steering KW - Antenna radiation patterns KW - Circular switched parasitic arrays KW - Method of moments KW - Induced EMF method KW - IEEE Africon 2011 LK - https://researchspace.csir.co.za PY - 2011 SM - 7283 T1 - Beam steering for circular switched parasitic arrays using a combinational approach TI - Beam steering for circular switched parasitic arrays using a combinational approach UR - http://hdl.handle.net/10204/5318 ER -