JPS62114377U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of this invention, Fig. 2 is a block diagram showing an embodiment of a jamming detection circuit and a search/tracking switching circuit, and Fig. 3 is a conventional jamming detection gate and a jamming detection gate in search mode. FIG. 4 is a time chart of the jamming detection gate in tracking mode, and FIG. 5 is a configuration diagram of a conventional radar device. In the figure, 1 is an antenna, 2 is a transmitter section, and 3
is a TR section, 4 is a mixer, 5 is a local signal generation section, 6 is a receiver section, 7 is a signal processing section, 8 is a jamming display section, 9 is a jamming detection circuit, 10 is a search/tracking switching circuit, 11 is a gate Position setting circuit, 1
2 is a reception video input, 13A to 13C are buffer amplifiers, 14 is a gate circuit, 15 is a stretch circuit, 16 is a comparison circuit, 17 is a reference voltage, 18 is an output for jamming display, 19 is a transmission pretrigger, 2
0 is a capture gate (front), 21 is a status signal that indicates whether or not it is tracking, 22 is an inverter, 23A
, 23B is an AND circuit, 24A to 24F are one-shot multivibrators, 25 is an OR circuit, 2
6 is a selector, 27 is a jamming detection gate in search mode, 28 is a jamming detection gate in tracking mode, 29 is an input from the gate position setting circuit, 30 is a transmission trigger, 31 is a range gate, 32
3 is a jamming detection gate used in a conventional radar device, 33 is a tracking target, 34 is a narrow tracking gate (front), 35 is a narrow tracking gate (back), and 36 is an acquisition gate (back). It should be noted that the same or equivalent parts in the drawings are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] In a radar device that not only has the function of searching or tracking a target, but also has the function of detecting interference waves from the target, an antenna used for both transmission and reception, which radiates the transmitted radio waves to the outside and receives reflected waves and interference waves from the target. a transmitter section that creates pulses of high-frequency power; a transmission/reception switching section that switches between transmitting radio waves from the transmitter section and receiving radio waves from the antenna; a mixer that converts the frequency of received radio waves into an intermediate frequency; a local signal generator that forms a local signal for converting the received radio waves into an intermediate frequency; and a receiver that amplifies the mixer output and outputs it as a video signal. A signal processing section that receives the output of the receiver section and processes distance tracking and angle tracking and creates various gates and triggers, and a signal processing section that receives the output of the receiver section and processes the interference waves present in the signal. An interference wave detection circuit that detects the interference wave detection circuit, and an interference wave detection gate that receives signals from the signal processing section and is divided into search and tracking times, and moves to any position within the effective reception range during search mode. A search/tracking switching circuit that creates a detection gate that can be set, creates detection gates before and after the tracking gate in tracking mode, and outputs the gate to the above interference wave detection circuit, and a search/tracking switching circuit that creates a detection gate that can be set in the tracking mode. A radar device comprising a gate position setting circuit whose position can be arbitrarily set or moved, and an interference wave display section which receives the output of the interference wave detection circuit and reports the presence of interference waves.