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:
Oct. 07, 1986
Filed:
Jul. 16, 1985
Bernard J Reits, Hengelo, NL;
Hollandse Signaalapparaten B.V., Hengelo, NL;
Abstract
A pulse radar apparatus is provided with a first receiver (4) connected to a directional antenna (3) and a second receiver (13) connected to an omnidirectional antenna (12). The receivers (4, 13) are suitable for reception and processing of long-duration and short-duration radar signals respectively, whereby at least the long-duration signals are frequency-modulated and subjected to pulse compression. The radar apparatus is further provided with a side-lobe blanking circuit (20) and switching means (25, 26). The side-lobe blanking circuit (20) comprises: comparator means (21, 22, 23) for supplying, in response to the long- and short-duration signals of the receivers (4, 13), a first control signal (PCSWP) indicative of the maximum amplitude of the long-duration signals, a second control signal (PCSWP) indicative of the maximum amplitude of the short-duration signals, and a third control signal (PC/PC) to indicate whether the amplitude of the short-duration signals of the first receiver (4) exceeds a given value. A logic circuit (24) supplies a switching signal (SWP1) to block the signals from the first receiver (4). The switching signal is dependent on the first (PCSWP) and second (PCSWP) control signals if the third (PC/PC) control signal indicates that the amplitude of the short-duration signals exceeds the given value.