Precision Measurement of Antenna System Noise Using Radio Stars

This paper reviews the National Bureau of Standards (NBS) preision noise measurements program for antenna systems which have been made using Cassiopeia A and the moon. The Earth Terminal Measurement System (ETMS) was developed by NBS to make measurements of figure of merit (G/T), and the noise equivalent flux (NEF). The accuracy of the noise measurements are, typically, between 5 and 15 percent for systems with antenna gains between 51 and 65 dB and frequencies between 1 and 10 GHz. Key words¿antenna gain; antenna half-power beamwidth; atmospheric loss; Cassiopeia A; earth terminal measurement system; figure of merit; moon; noise equivalent flux; noise measurement; radio stars; satellite communication.

[1]  A. Newell,et al.  Accurate measurement of antenna gain and polarization at reduced distances by an extrapolation technique , 1973 .

[2]  M. Kanda,et al.  An Improved Solid-State Noise Source (Short Papers) , 1976 .

[3]  Williams S. Crane,et al.  IMPACT OF SOLAR CALIBRATION ON TELEMETRY SYSTEM TESTING AND CHECKOUT , 1972 .

[4]  Walter R Hedeman.  The Sun as a Calibration Signal Source for L- and S-Band Telemetry , 1968 .

[5]  J. Baars.  The measurement of large antennas with cosmic radio sources , 1973 .

[6]  D. M. Kerns.  Correction of near-field antenna measurements made with an arbitrary but known measuring antenna , 1970 .

[7]  Ralph E. Taylor,et al.  Vhf/uhf antenna calibration using radio stars , 1970 .

[8]  D. F. Wait.  Satellite earth terminal G/T measurements , 1977 .

[9]  William C Daywitt.  Error equations used in the NBS earth terminal measurement system , 1977 .

[10]  M. Kanda,et al.  An Improved Solid State Noise Source , 1976 .

[11]  T. Howell,et al.  Attenuation of radio waves by the troposphere over the frequency range 0.4–10 GHz , 1967 .

[12]  M. Kanda.  Accuracy considerations in the measurement of the power gain of a large microwave antenna , 1974 .

[13]  M. Kanda.  An error analysis for absolute flux density measurements of Cassiopeia A , 1976, IEEE Transactions on Instrumentation and Measurement.

[14]  David F Wait.  Earth Terminal Measurement System operations manual , 1978 .

[15]  D. M. Kerns,et al.  Determination of both polarisation and power gain of antennas by a generalised 3-antenna measurement method , 1971 .

[16]  C. Stelzried,et al.  The determination of noise temperatures of large paraboloidal antennas , 1962 .

[17]  Glenn F. Engen.  A New Method of Characterizing Amplifier Noise Performance , 1970 .

[18]  E. Olsen,et al.  The evolution of the radio spectrum of Cassiopeia A , 1974 .

[19]  D. F. Wait,et al.  Thermal Noise from a Passive Linear Multiport , 1968 .

[20]  T. Satoh,et al.  Atomospheric attenuation and scintillation of microwaves from outer space , 1970 .

[21]  E. A. Ohm.  Receiving system , 1961 .

[22]  Neil T. Larsen,et al.  A new self-balancing DC-substitution RF power meter , 1976, IEEE Transactions on Instrumentation and Measurement.

[23]  R. Taylor.  L- and S-band antenna calibration using Cass. A or Cyg. A , 1970 .

[24]  Ralph E. Taylor.  L-/S-band calibration error analysis. , 1971 .