Study and development of near-field test methods for antennas
Abstract
An experimental facility for near field testing of spacecraft antennas was planned. The facility is foreseen for the study and development of the so-called spherical test technique in which the radiation from the antenna under test is measured on a spherical surface in its near field. The associated radiation pattern of the test antenna is subsequently found by transforming the near field data by the use of a computer. A series of investigations was carried out as a first step towards implementation of the planned experimental facility in the Radio Anechoic Chamber of the Technical University of Denmark. Design and construction of certain critical hardware items for the precise alignment and rotation of the test antenna were made. A data collecting and controlling system was specified to a level permitting budgets to be worked out. Computer simulation studies of the influence of inaccuracies in the mechanical or electrical systems performing the near field measurements were made.
- Publication:
-
Final Report Technical Univ. of Denmark
- Pub Date:
- January 1978
- Bibcode:
- 1978tud..rept.....B
- Keywords:
-
- Antenna Radiation Patterns;
- Near Fields;
- Spacecraft Antennas;
- Test Facilities;
- Computer Programming;
- Data Acquisition;
- Data Processing;
- Equipment Specifications;
- High Frequencies;
- Spheres;
- Communications and Radar