Abstract—This paper compares the theoretical and measured
antenna patterns of a slant 45-degree antenna on a rolled edge
ground plane. Advantages of using sampled nearfield currents in
combination with large element physical optics in determining the
reflected far fields will be described.
Abstract—Since its introduction 25 years ago, the probe-fed Uslot patch antenna has remained popular. Recently, Characteristic
Mode Analysis (CMA) revealed these devices are governed by
Coupled Mode Theory (CMT). Although this principle is
conceptually simple, achieving this understanding is only possible
through a systematic analysis using CMA. This paper uses the Uslot patch to illustrate a general process for analyzing electrically
small antennas using CMA with the software package FEKO.
Aman Samaiyar, Dong-Chan Son, Mohamed Elmansouri, and Dejan Filipovic
Abstract—An approach based on shared aperture antenna
array is researched for simultaneous transmit and receive (STAR)
applications. The proposed configuration is a 10×10 antenna array
of circularly-polarized (CP) elements with 50 elements, somewhat
sparsely distributed, dedicated for Tx while the remaining
elements dedicated for Rx. The high isolation is achieved between
Tx and Rx elements at the expense of higher sidelobe levels, which
is an inherent property of sparse antenna arrays. To demonstrate
the performance of the proposed STAR configuration, numerical
modelling is conducted using multilevel fast multipole method
(MLFMM) solver in Altair FEKO.
Gopinath Gampala and C.J. Reddy
Abstract—Traditional antenna optimization solves the
modified version of the original antenna design for each iteration.
Thus, the total time required to optimize a given antenna design is
highly dependent on the convergence criteria of the selected
algorithm and the time taken for each iteration. The use of
machine learning enables the antenna designer to generate trained
mathematical model that replicates the original antenna design
and then apply optimization on the trained model. Use of trained
model allows to run thousands of optimization iterations in a span
of a few seconds
Abstract— An open-source antenna pattern measurement
system comprised of software-defined radios (SDRs), standard
PVC tubing, and 3-D printer components measures the radiation
patterns of student-built prototype antennas. Position control is
realized using an Arduino microcontroller. Measured principal
plane gain patterns for two antenna prototypes are compared to
(FEKO) simulated results. The low-cost, open-source nature of the
measurement system is ideal for undergraduate-level investigation
of antenna theory and measurement
Aaron Brandewie and Robert Burkholder
Abstract—Objects in low earth orbit such as CubeSats and the
International Space Station (ISS) move with constant velocity
along a linear trajectory when viewed from a ground-based radar.
The small change in attitude of the object as it flies overhead
permits the generation of an inverse synthetic aperture radar
(ISAR) image. In this paper, Altair’s FEKO™ software is used to
model the monostatic radar scattering from the ISS as a function
of frequency and aspect angle. The computed data is used for
generating a simulated ISAR image from a ground-based radar.
The system design requirements for the radar are calculated from
the radar equation.
Marlize Schoeman, Renier Marchand, Johann van Tonder, Ulrich Jakobus, Andres Aguilar, Kitty Longtin, Martin Vogel, and Taha Alwajeeh “FEKO Simulation of Radar Scattering from Objects in Low Earth Orbit for ISAR Imaging”
Aaron Brandewie and Robert Burkholder
Abstract—This paper describes some of the latest features in
the commercial electromagnetic software Feko (including
WinProp). These include the modeling of non-ideal cable shield
connections, the parallel direct adaptive cross approximation
(ACA) solver, edge and wedge diffraction for the ray launching
geometrical optics (RL-GO) solver, and several new features
related to automotive radar.