Method for harmonic number determination in a microwave frequenc

Details Method for harmonic number determination in a microwave frequenc Method for harmonic number determination in a microwave frequenc

1989-07-31

1991-04-16

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

G01R 2502

Patent

active

050086103

ABSTRACT:
Method and apparatus for determining a generalized harmonic number in a harominic heterodyne converter wherein the frequency of an input signal is determined from a local oscillator frequency, an intermediate frequency obtained by mixing the local oscillator frequency with the input signal, and a harmonic number. The likelihood of error in determining harmonic number is reduced by providing a large separation between local oscillator frequencies that are used in determining harmonic number. The method involves the steps of determining an estimated harmonic number utilizing closely-spaced local oscillator frequencies and then utilizing the estimated harmonic number to compute widely-spaced local oscillator frequencies which are utilized for determining a corrected generalized harmonic number. One variation of the technique is utilized for high harmonic numbers, and another variation of the technique is utilized for low harmonic numbers.

REFERENCES:
patent: 4266208 (1981-05-01), Cornish
patent: 4785463 (1988-11-01), Janc et al.
patent: 4797677 (1989-01-01), MacDoran
patent: 4816769 (1989-03-01), Ma et al.

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