Mathematical Absorber Reflection Suppression (MARS) for ...
Mathematical Absorber Reflection Suppression (MARS) for ... Mathematical Absorber Reflection Suppression (MARS) for ...
Self-Comparison Measurements• Self-comparison technique often used to evaluate the effectsof error sources on the measurement results• Useful to establish a „truth model‟, or our best estimate ofthe „correct‟ measurement result• Use this for comparison to results derived with compromises inaccuracy in favor of reduced test time. For this, we use threesteps:1. take the data with minimal or controlled position errors (stop motion orslow scanning)2. average out range reflection and alignment errors with a redundantscanning technique3. apply NSI‟s Mathematical Absorber Reflection Suppression (MARS)technique• These three steps will help to derive the „true‟ antenna radiationpattern for use in subsequent self-comparison measurements toderive the effect of error sources.10
360 phi vs. 180 phi SNF ScanningAUT points to + θ and – θ sides of chamberTwo different scanninggeometries – both give acomplete AUT data setAUT points to only + θ sides of chamber11
- Page 1 and 2: Mathematical Absorber Reflection Su
- Page 3 and 4: NSI‟s New SNF Chamber• NSI-700S
- Page 5 and 6: Amplitude (dB)Plot Subtraction Expl
- Page 7 and 8: Simple Chamber Reflection Test• T
- Page 9: Typical AUT Offset Test ResultWR Si
- 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
360 phi vs. 180 phi SNF ScanningAUT points to + θ and – θ sides of chamberTwo different scanninggeometries – both give acomplete AUT data setAUT points to only + θ sides of chamber11
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