Title :
Strut shaping of 34m Beam Waveguide antenna for reductions in near-field RF and noise temperature
Author :
Khayatian, Behrouz ; Hoppe, Daniel J. ; Britcliffe, Michael J. ; Gama, Eric
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
Strut shaping of NASA´s Deep Space Network (DSN) 34m Beam Waveguide (BWG) antenna has been implemented to reduce near-field RF exposure while improving the antenna noise temperature. Strut shaping was achieved by introducing an RF shield that does not compromise the structural integrity of the existing antenna. Reduction in the RF near-field level will compensate for the planned transmit power increase of the antenna from 20 kW to 80 kW while satisfying safety requirements for RF exposure. Measured antenna noise temperature was also improved by as much as 1.5 K for the low elevation angles and 0.5 K in other areas.
Keywords :
electromagnetic shielding; near-field communication; radiofrequency power transmission; space communication links; waveguide antennas; DSN BWG antenna; DSN beam waveguide antenna; NASA deep space network; RF exposure; RF shield; antenna noise temperature; antenna structural integrity; low elevation angles; near-field RF exposure reduce; noise temperature; power 20 kW to 80 kW; power transmission planning; strut shaping; Antenna measurements; Antennas; Land surface temperature; Noise; Radio frequency; Temperature measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6349018
