Definition of IMR antenna test techniques
Abstract
Compact antenna test ranges (CR) with two cylindrical reflectors are compared with other indoor techniques. It is shown that only CR create an electromagnetic field environment suitable for far field simulation. The reflectivity level of CR is better than that of other (indoor and outdoor) ranges. Levels as low as -70 dB are realistic; this implies that an important source of errors in pattern measurements is eliminated. The cross-polar level is relatively high for linear polarization (vertical plane only), but accurate cross-polar measurements are possible. Errors due to amplitude taper are acceptable even for antennas which occupy 60% of the CR dimension (linear). Phase characteristics are almost perfect.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- September 1984
- Bibcode:
- 1984STIN...8614495V
- Keywords:
-
- Antenna Radiation Patterns;
- Far Fields;
- Test Facilities;
- Cross Polarization;
- Linear Polarization;
- Near Fields;
- Phase Error;
- Reflectance;
- Satellite Antennas;
- Communications and Radar