Characterization of RF signal coupling between MeerKAT telescope structures

Kuja, S.; Wiid, P. G.

doi:10.1109/apwc.2015.7300192

Cited by 5 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The stub-up is situated inside and at the base of the pedestal. Quantified levels of shielding that the stub-up provides are found in [5,11].…”

Section: The Stub-upmentioning

confidence: 99%

“…Radio Frequency Interference (RFI) has the potential to degrade the ability of the SKA telescope to do the science for which it is being constructed [5]. Thus, a clean RFI environment is essential for the MeerKAT to achieve its scientific objectives.…”

Section: Introductionmentioning

confidence: 99%

“…The close proximity of the individual MeerKAT dishes at the core site could potentially lead to unexpected inter-coupling problems from low-level radiation due to currents on structure cables [11]. Mutual coupling between antennas used in radio telescope array had previously been done with electrically small antennas such as dipoles [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Computational Modelling for Dish-to-Dish Coupling Investigations on Meerkat Telescope

Kuja¹,

Wiid²

2018

SAIEE Afr. Res. J.

Self Cite

View full text Add to dashboard Cite

The MeerKAT telescope will form part of the Square Kilometre Array (SKA) which will have orders of magnitude greater sensitivity than existing radio telescopes. Radio Frequency Interference (RFI) poses a great threat to such sensitive equipment. We characterize electromagnetic (EM) signals on a single dish structure using a physical scale model, computational electromagnetic (CEM) modelling and field measurement. The CEM code and method of moments frequency domain numerical technique are utilised throughout the study. We successfully achieve CEM model verification through measurement of a physical scale model in an anechoic chamber. The validated model is further verified with full scale on-site measurements. A transfer function determined from an incident electric field and the associated induced currents on various cables of a single dish structure is used to compare simulation and measurement. We use our corroborated CEM model to investigate dish to dish coupling in order to predict whether the MeerKAT system would be at risk. With a low power radiation of-70 dBm from a neighbouring dish, we predict coupled power of less than-120 dBm to the nearest dish.

show abstract

“…The stub-up is situated inside and at the base of the pedestal. Quantified levels of shielding that the stub-up provides are found in [5,11].…”

Section: The Stub-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%