tokens: ['In', 'the', 'following', 'a', 'practical', 'version', 'of', 'the', 'Free', 'Space', 'VSWR', 'method', 'is', 'presented', '', 'In', 'the', 'Free', 'Space', 'VSWR', 'method', 'the', 'quality', 'of', 'quite', 'zone', 'is', 'measured', 'from', 'amplitude', 'ripple', 'caused', 'by', 'reflections', 'inside', 'the', 'anechoic', 'chamber', 'Phase', 'variation', 'of', 'the', 'direct', 'signal', 'and', 'the', 'reflected', 'signals', 'is', 'obtained', 'by', 'moving', 'a', 'fieldprobe', 'in', 'the', 'quiet', 'zone', 'Amplitude', 'ripple', 'in', 'the', 'quiet', 'zone', 'is', 'caused', 'by', 'this', 'phase', 'variation', 'of', 'reflected', 'signals', 'and', 'the', 'direct', 'signal', 'from', 'antenna', 'The', 'figure', 'F', 'below', 'shows', 'seven', 'measuring', 'positions', 'Figure', 'F', 'Measurement', 'positions', 'with', 'mm', 'separation', 'In', 'each', 'of', 'the', 'sevenmeasurement', 'position', 'amplitude', 'of', 'power', 'received', 'by', 'fieldprobe', 'dBm', 'is', 'measured', 'where', 'is', 'index', 'of', 'measuring', 'position', 'Variance', 'of', 'measurement', 'distance', 'to', 'the', 'antenna', 'from', 'fieldprobe', 'in', 'different', 'measurement', 'positions', 'can', 'be', 'compensated', 'by', 'following', 'equation', 'where', '', 'is', 'distance', 'to', 'point', 'from', 'the', 'antenna', 'is', 'distance', 'to', 'centre', 'of', 'quiet', 'zone', 'from', 'the', 'antenna', 'is', 'uncorrected', 'measurement', 'value']