MID-Radio Telescope, Single Pixel Feed Packages for the Square Kilometer Array: An Overview
Pellegrini, Alice, Flygare, Jonas, Theron, Isak P., Lehmensiek, Robert, Peens-Hough, Adriaan, Leech, Jamie, Jones, Michael E., Taylor, Angela C., Watkins, Robert E. J., Liu, Lei, Hector, Andre, Du, Biao, Wu, Yang
Published in IEEE journal of microwaves (01.01.2021)
Published in IEEE journal of microwaves (01.01.2021)
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Journal Article
An Optimal 18 m Shaped Offset Gregorian Reflector for the ngVLA Radio Telescope
Lehmensiek, Robert, de Villiers, Dirk I. L.
Published in IEEE transactions on antennas and propagation (01.12.2021)
Published in IEEE transactions on antennas and propagation (01.12.2021)
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Journal Article
A steerable dielectric resonator antenna array with isoflux radiation pattern
Davids, Vernon P., Lehmensiek, Robert
Published in Microwave and optical technology letters (01.12.2019)
Published in Microwave and optical technology letters (01.12.2019)
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Journal Article
Rapid Calculation of Antenna Noise Temperature in Offset Gregorian Reflector Systems
de Villiers, Dirk I. L., Lehmensiek, Robert
Published in IEEE transactions on antennas and propagation (01.04.2015)
Published in IEEE transactions on antennas and propagation (01.04.2015)
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Journal Article
Updates on the Optics Design of the ngVLA 18-meter Reflector System
Lehmensiek, Robert
Published in 2024 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) (09.01.2024)
Published in 2024 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) (09.01.2024)
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Conference Proceeding
Constant Radiation Characteristics for Log-Periodic Dipole Array Antennas
Lehmensiek, Robert, de Villiers, Dirk I. L.
Published in IEEE transactions on antennas and propagation (01.05.2014)
Published in IEEE transactions on antennas and propagation (01.05.2014)
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Journal Article
Design of a wideband circularly polarized 2 × 2 array with shorted annular patches at X-band on a CubeSat
Lehmensiek, Robert
Published in 2017 International Symposium on Antennas and Propagation (ISAP) (01.10.2017)
Published in 2017 International Symposium on Antennas and Propagation (ISAP) (01.10.2017)
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Conference Proceeding
The optics and feed design of the 18 metre reflector antenna for the ngVLA
Lehmensiek, Robert, Villiers, Dirk de
Published in 2022 International Conference on Electromagnetics in Advanced Applications (ICEAA) (05.09.2022)
Published in 2022 International Conference on Electromagnetics in Advanced Applications (ICEAA) (05.09.2022)
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Conference Proceeding
A design methodology of the wideband orthogonal mode transducer for the SKA Band 2 feed
Lehmensiek, Robert
Published in 2016 10th European Conference on Antennas and Propagation (EuCAP) (01.04.2016)
Published in 2016 10th European Conference on Antennas and Propagation (EuCAP) (01.04.2016)
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Conference Proceeding
Creating accurate multivariate rational interpolation models of microwave circuits by using efficient adaptive sampling to minimize the number of computational electromagnetic analyses
Lehmensiek, R., Meyer, P.
Published in IEEE transactions on microwave theory and techniques (01.08.2001)
Published in IEEE transactions on microwave theory and techniques (01.08.2001)
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Journal Article