Title: First and fourth harmonic system

Abstract: 3. A radar system comprising a continuous wave transmitter which transmits a carrier frequency signal, a relatively low frequency source coupled to the transmitter for phase modulating the carrier signal, a receiver for receiving an echo signal and coupled to said transmitter, said receiver including a mixer for beating the echo signal with the carrier signal, means for separating and selectively amplifying the first and fourth harmonic components of the mixer output signal, and means for comparing said components.

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Inventors: Stoakes, William L. (Fort Wayne, IN, US)

Application Number: 613988
Filing Date: 1956-10-04
Publication_date: 1976-11-16
Assignee: International Telephone and Telegraph Corporation (Nutley, NJ)
Primary Class(es): 342/193 342/200
Other Classes:
US Patent Ref:

2407287	Sep, 1946	Labin	343/103.
2408048	Sep, 1946	Deloraine	343/103.
2426204	Aug, 1947	Grieg	343/103.
2453169	Nov, 1948	Varian	343/14.
2931030	Mar, 1960	Rey	343/14.

Other Refs:
Primary Examiner: Hubler, Malcolm F.
Assistant Examiner:
Attorney: O'Halloran; John T., Van Der Sluys; Peter