Augmented radiometric system
Patent 4292638 Issued on September 29, 1981. Estimated Expiration Date: 
September 29, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 29, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References3599207 InventorsAssigneeApplicationNo. 06/154099 filed on 06/17/1971US Classes:342/88, Transmission timing (e.g., ring around)342/103, Phase locked loop342/174, Calibrating342/351Including a radiometerExaminersPrimary: Bentley, Stephen C.Attorney, Agent or FirmInternational ClassesG01S 13/86 (20060101)G01R 29/08 (20060101) G01K 11/00 (20060101) G01S 13/00 (20060101) AbstractAn improved microwave radiometric system features the employment of incoherent noise illumination of a selected target for improving the measured radiometric temperature contrast between the target and its spatial background and for increasing the distance at which such a target may be detected. Broad band noise illumination is cyclically transmitted and the receiver is cyclically activated in the high frequency signal comparison system under control of a phase locking loop so that optimum comparison is achieved over a variety of target distances. | |
