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Ludick D.J.,EM Software and Systems S.A. Pty Ltd | Jakobus U.,EM Software and Systems S.A. Pty Ltd | Vogel M.,EM Software and Systems Inc.
8th European Conference on Antennas and Propagation, EuCAP 2014 | Year: 2014

Characteristic mode analysis (CMA) is a useful design tool that enables antenna designers to follow a nonbrute force approach of systematically extracting the radiating properties of a structure. These properties are quantified with CMA in the form of eigenvalues and eigenvectors, i.e., the solutions of a generalised eigenvalue equation that is formulated from the Method-of-Moments (MoM) impedance matrix. One particular challenge to CMA, however, is the manner in which quantities such as eigenvalues are plotted as a function of frequency. At each discrete frequency sample, the eigenvalues are sorted according to modal significance, i.e., based on the efficiency with which they radiate. At higher frequencies, the ordering of modes may differ from that obtained at lower frequencies. To mitigate this problem, we have developed a tracking algorithm to keep the ordering of modes as consistent as possible over frequency. © 2014 European Association on Antennas and Propagation. Source


Jiang R.,China Telecom | Wang C.,EM Software and Systems Inc.
Proceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014 | Year: 2014

This paper presents a procedure of designing an offset Gregorian dual-reflector antenna with a non-circular aperture of the main reflector using FEKO. A 1.2m Ku band offset dual-reflector antenna is set as an example to compare the results from two solvers in FEKO with the measurement data. There are good agreements on the radiation patterns simulated in FEKO with those by measurement. © 2014 IEEE. Source


Reddy C.J.,EM Software and Systems Inc. | Peterson A.,Georgia Institute of Technology
IEEE Antennas and Propagation Magazine | Year: 2011

The Applied Computational Electromagnetics Society (ACES) provides a forum for issues relevant to numerical modeling in applied electromagnetics. The primary focus of ACES is on computational techniques, electromagnetics modeling software, and applications. The Applied Computational Electromagnetics Society offers the ACES annual symposium, publications, code user groups, benchmark-problem solution workshops, short courses, software demonstrations, and other activities. © 2011 IEEE. Source


Gampala G.,EM Software and Systems Inc. | Reddy C.J.,EM Software and Systems Inc.
2013 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2013 - Proceedings | Year: 2013

Long-Term Evolution (LTE) technology implements MIMO for higher data rates that need multiple antennas on the mobile handset (G. Gampala, et al., Microwave Journal, March 2012). At the same time, there is also an increased pressure on the design engineers to come up with attractive thinner and slimmer phones, leaving very little space for the antenna engineers. © 2013 IEEE. Source


Gampala G.,EM Software and Systems Inc. | Reddy C.J.,EM Software and Systems Inc. | Ludick D.,EM Software and Systems S.A. Pty Ltd | Futter P.,EM Software and Systems S.A. Pty Ltd
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) | Year: 2014

Mobile communications technology is constantly changing with the increasing demands of the consumers and Long Term Evolution (LTE) is widely accepted as the technology that can meet these requirements. This paper presents an electrically small antenna designed for European LTE frequency band of 1800MHz. A systematic design procedure is developed using characteristic mode analysis (CMA). The CMA design procedure provides needed insights for the antenna designers to quickly come up with an antenna design using an arbitrarily shared structure. © 2014 IEEE. Source

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