Adopt planar & cylindrical near-field measurement to measure the antenna, in order to obtain the antenna's performance parameter

Working principle:It adopts two test Ports of Vector Network Analyzer as the Input and output terminal of theNear-Field measurement, Under the control of the host computer, meanwhile, through thetest probe on the scanner, output terminal transmits signals in a certain scanning modeunder the control of the driving device. At the same time, another port of tester collects testdata by using the antenna matrix and transfer the data to the master computer, then thedata processing system will analysis, diagnosis the Near-field characteristics of theantenna matrix , and calculate the Far-field parameters. When perform cylindrical near-field measurement, the test antenna is mounted on the positioner, Under the control of the host computer, coordinate the positioner's rotating positioning, probe's scanning, and amplitude & phase data collection of the instruments. And then adopt cylindrical near-field data processing system to analysis, diagnosis the Near-field characteristics of the antenna matrix, and calculate the Far-field parameters .

System requires:Working Frequency: 0.8~5GHzSize of test antenna: 3.0m×0.35mEffective scanning range: 4.5m×4.5mError of sidelobe measurement: <±1dB(-15dB,in sidelobe electric level)Error of gain measurement: ≤ ± 0.5dBPositioning accuracy: <±0.2mm

System Composition:a) scannerb) Positionerc) Probed) Constant phase RF cablese) Scanner's servof) Scanner's controlg) Instrument's data acquisitionh) Test data processingi) Instrument systemj) Shielded microwave anechoic chamber

Planar & Cylindrical Near-field Measurement System