Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent
1997-05-30
2000-02-01
Brown, Glenn W.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
324 7619, 324 7653, 324637, G01R 2300
Patent
active
060207337
ABSTRACT:
A two port handheld VNA enabling both reflection and transmission measurements to be made over a range of 25 MHz to 3.3 GHz frequency range. The handheld VNA includes a tracking synthesizer which generates a LO signal without a direct connection to a reference oscillator, enabling resolution of the LO signal to be independent of a generated RF test signal. synchronous detectors are further included to provide incident, reflected, and transmitted IF signals to an A/D converter. To enable operation in the presence of external signals, a feedback dither line is provided from one of the synchronous detector outputs to sweep the frequency of the reference oscillator. The handheld VNA also is configured to optionally operate as a frequency monitor to determine the frequency range and power level of incoming signals without upconverting and downconverting to eliminate images as typically done in a spectrum analyzer. The frequency monitoring circuit operates by dividing the frequency range to be monitored into bins. The LO signal is then stepped for each bin until RF signals within the bin frequency range can generate an IF signal. The maximum IF signal power level detected during measurements for the bin is then stored as a power level for signals in each bin.
REFERENCES:
patent: 3808526 (1974-04-01), Jackson
patent: 4510440 (1985-04-01), Ryder
patent: 4527116 (1985-07-01), Sorba et al.
patent: 4603304 (1986-07-01), Burns et al.
patent: 4626787 (1986-12-01), Mefford
patent: 4728884 (1988-03-01), Gumm
patent: 4742566 (1988-05-01), Nordholt et al.
patent: 4868494 (1989-09-01), Ryder et al.
patent: 4943787 (1990-07-01), Swapp
patent: 5016202 (1991-05-01), Seibel et al.
patent: 5119035 (1992-06-01), Goy et al.
patent: 5140703 (1992-08-01), Payne
patent: 5210484 (1993-05-01), Remillard et al.
patent: 5317284 (1994-05-01), Yang
patent: 5434888 (1995-07-01), Fukuchi
patent: 5524281 (1996-06-01), Bradley et al.
Day, Chris, "Design Considerations for Maximizing the Performance/Cost Ratio in an RF Economy Network Analyzer", Conference Proceedings RF Expo West 1995, EMC/ESD International, San Diego, Jan. 29-Feb. 1, 1995, pp. 238-254.
Anritsu Company
Brown Glenn W.
LandOfFree
Two port handheld vector network analyzer with frequency monitor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two port handheld vector network analyzer with frequency monitor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two port handheld vector network analyzer with frequency monitor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-940375