Mariet Venter
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Mariet Venter has a total of 2 co-authors. Here are the top co-authors by number of shared publications:
- Dirk I. L. de Villiers
Department of Electrical and Electronic Engineering, Stellenbosch University, Stellenbosch, South Africa
1 shared publication Jocias A. Malan
South African Radio Astronomy Observatory (SARAO),Cape Town,South Africa
1 shared publication
Latest Publications
- 28 May 2025
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 73 (9) , 6943-6948
Efficient Beam Pattern Modeling for Reflector Antennas Within Multidimensional Feed Parameter Spaces Using a Reference Design
This paper presents an efficient beam pattern modeling method for reflector antennas where the performance of a specific feed antenna, as a function of frequency and geometric variations of the antenna, is known on a different (but similar) reflector antenna. Instead of modeling patterns for the desired reflector directly, the difference patterns between the desired and previously modeled reflectors are employed. Scaling and normalization measures are applied to the patterns to simplify their modeling as Characteristic Basis Function Patterns (CBFPs), which can be accurately interpolated over the desired design parameter space. The CBFP coefficients drive an adaptive sampling algorithm that aims to accurately obtain the antenna’s performance across the entire parameter space with as few electromagnetic simulations as possible. Two examples are presented using basic reflector optics and a simple choke horn and demonstrate the advantage of using a reference design compared to directly modeling the reflector patterns, showing that fewer simulations are required to obtain a certain level of accuracy.
- 28 May 2025
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 73 (9) , 6943-6948
Efficient Beam Pattern Modeling for Reflector Antennas Within Multidimensional Feed Parameter Spaces Using a Reference Design
This paper presents an efficient beam pattern modeling method for reflector antennas where the performance of a specific feed antenna, as a function of frequency and geometric variations of the antenna, is known on a different (but similar) reflector antenna. Instead of modeling patterns for the desired reflector directly, the difference patterns between the desired and previously modeled reflectors are employed. Scaling and normalization measures are applied to the patterns to simplify their modeling as Characteristic Basis Function Patterns (CBFPs), which can be accurately interpolated over the desired design parameter space. The CBFP coefficients drive an adaptive sampling algorithm that aims to accurately obtain the antenna’s performance across the entire parameter space with as few electromagnetic simulations as possible. Two examples are presented using basic reflector optics and a simple choke horn and demonstrate the advantage of using a reference design compared to directly modeling the reflector patterns, showing that fewer simulations are required to obtain a certain level of accuracy.
- 28 August 2021
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-4
Radio Frequency Engineering Advancements for the Ghana Radio Telescope
This paper presents recent radio frequency (RF) engineering work performed for the Ghana Radio Telescope, specifically concerning receiver and electromagnetic component design and analysis. An upgraded so-called Mark II receiver, currently nearing the end of its development phase, improves the bandwidth by approximately 100% and 30% for the 5 and 6.7 GHz bands, respectively. A proposed new wideband orthomode transducer (OMT) design is presented to replace the existing Intermediate Circular Orbit (ICO) satellite system components, which are known to add extra noise. Also contributing to the system noise temperature is the antenna and spillover temperatures. Electromagnetic simulation data is used to determine these parameters, showing that the antenna can contribute up to 32 K to the system noise temperature near the horizon. The resulting predicted sensitivity of the telescope is presented and is in the range of 4.6 to 5 m 2 /K assuming a receiver temperature of 90 K and an aperture efficiency of 70%.
- 28 August 2021
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-4
Radio Frequency Engineering Advancements for the Ghana Radio Telescope
This paper presents recent radio frequency (RF) engineering work performed for the Ghana Radio Telescope, specifically concerning receiver and electromagnetic component design and analysis. An upgraded so-called Mark II receiver, currently nearing the end of its development phase, improves the bandwidth by approximately 100% and 30% for the 5 and 6.7 GHz bands, respectively. A proposed new wideband orthomode transducer (OMT) design is presented to replace the existing Intermediate Circular Orbit (ICO) satellite system components, which are known to add extra noise. Also contributing to the system noise temperature is the antenna and spillover temperatures. Electromagnetic simulation data is used to determine these parameters, showing that the antenna can contribute up to 32 K to the system noise temperature near the horizon. The resulting predicted sensitivity of the telescope is presented and is in the range of 4.6 to 5 m 2 /K assuming a receiver temperature of 90 K and an aperture efficiency of 70%.