The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 1983
Filed:
Aug. 27, 1980
Rudolf Hauptmann, Munich, DE;
Gerhard Foeller, Soecking, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A circuit arrangement for side lobe suppression in radar wherein the undesired signals which arrive at the radar receiver by way of the side lobes of the antenna are cancelled by using a compensation circuit formed as a loop. Additional circuit means for the formation of a weighting factor for the weighting multiplier are provided in the feedback of the loop between a correlator and a weighting amplifier. When the noise power at the output of the compensating circuit is greater than the noise power that the radar receiver supplies without the compensation circuit, the output will be switched from the compensation circuit to a direct output of the radar receiver. The comparison of the noise power in a comparator then supplies the control signal for the change-over. The change-over can also occur as a function of thermal noises when the amount of the weighting factor exceeds a predetermined value. The weighting factor is monitored by a control circuit. So as to make the response behaviour of the compensated loop independent of the noise signal power, a controlled amplifier is incorporated in the control circuit with the gain of the amplifier being inversely proportional to the square of the noise amplitude in the auxiliary channel. The controlled amplifier can be mounted in the feedback branch between the correlator and the weighting multiplier or can be inserted in front of one of the two inputs of the correlator.