Mathematical Absorber Reflection Suppression (MARS) for ...

More documents

Recommendations

Info

Range Accuracy Evaluation Methods• Against independent measurements of antenna in other testsystems• Best approach• Time consuming, costly• Simple near-field reflection test• Compare theta cut with AUT at 0 deg vs 180 deg• Easy to do, quick look at reflection levels• Chamber reflection test with AUT offset in Z direction• Full 2D NF tests with AUT offset by ¼ lambda• Time consuming, results affected by AUTremoval/realignment• NSI 180 phi vs. 360 phi vs redundant comparison test• Full 2D NF test with AUT on two measurement spheres• Easy to do, automatic processing, no AUT remounting needed4
Amplitude (dB)Plot Subtraction Explained• Converts measured patterns from powerinto voltage• Per<strong>for</strong>ms subtraction in pattern angles ofinterest• Residual error plot is the error level thatwould cause the observed patternchangesFar-field amplitude of WR137SGH020.nsi - Far-field amplitude of WR137SGH019.nsi0Plot 1 Plot 2 Plot 1 - Plot 2-10-20Pattern difference-30-40-50Measured signal1 st configMeasured signal2 nd config-60-70-75 -50 -25 0 25 50 75Azimuth (deg)5
Page 1 and 2: Mathematical Absorber Reflection Su
Page 3: NSI‟s New SNF Chamber• NSI-700S
Page 7 and 8: Simple Chamber Reflection Test• T
Page 9 and 10: Typical AUT Offset Test ResultWR Si
Page 11 and 12: 360 phi vs. 180 phi SNF ScanningAUT
Page 13 and 14: MARS Processing• MARS uses the st
Page 15 and 16: Key MARS Requirements• Over sampl
Page 17 and 18: dBError Level & Improvement for DLP
Page 19 and 20: dBError Level Improvement for WR-28
Page 21 and 22: Amplitude (dB)Amplitude (dB)Open La
Page 23 and 24: Open Lab Test Results - WR-1500 SGH
Page 25 and 26: MARS Improvement SummaryAntenna Ave

Mathematical Absorber Reflection Suppression (MARS) for ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?