Review of Spherical Near-Field Measurements,
SCIENTIFIC-ATLANTA INC GA
Pagination or Media Count:
Over the past decade spherical near-field measurements have made the transition from research to application. Based upon spherical modal expansion and a port-to-port transmission equation, the spherical near-field technique utilizes sophisticated mathematical processing to solve the practical problem of obtaining antenna pattern measurements in a confined space. Coventional hardware--consisting of rotary test positioners, signal sources and receivers augmented by digital control electronics and minicomputers--now makes spherical near-field measurements practical by automation. Recent developments in spherical near-field software architecture have expanded the basic scanning feature to include dual-port scanning, probe pattern and probe polarization correction, three antenna polarization measurements, gain comparison measurements and correction for thermal drift of the system.
- Test Facilities, Equipment and Methods
- Radiofrequency Wave Propagation