JPS62124576U - - 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 gate creation circuit, a switching circuit, a jamming detection circuit, and a gate position setting circuit. FIG. 4 is a time chart of the jamming detection gate in the tracking mode. FIG. 5 is a configuration diagram of a conventional radar device. In the figure, 1 is an antenna, 2 is a transmitter section, 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 gate creation circuit, 10 is a switching circuit,
11 is a jamming detection circuit, 12 is a gate position setting circuit, 13 is a receiving video input, 14A to 14D
15 is a buffer amplifier, 15 is a gate circuit, 16 is a stretch circuit, 17 is a comparison circuit, 18 is a reference voltage, 19 is a jamming detection output, 20 is a status signal that indicates whether or not tracking is performed, 21 is a transmission pre-trigger, and 22 is a capture (previous) signal. ) gate, 23 is an inverter, 24A to 24B are AND circuits, 25A to 25F
is a monostable multivibrator, 26 is an OR circuit, 27 is a jamming detection gate signal in search mode, 28 is a jamming detection gate signal in tracking mode, 29 is a selector circuit, 30 is an analog switch, 31 is a detection in search mode Variable resistors for setting the gate position, 32 and 33 are variable resistors for setting the detection gate position in tracking mode, 34 is the transmission trigger, 35 is the R gate, 36 is the conventional jamming detection gate, 37 is the tracking target, and 38 is the tracking Gate (front), 39 is tracking gate (rear), 40 is acquisition (
After) It is a gate. Note that the same or corresponding parts in the figures are given 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 high-frequency power pulses, a transmission/reception switching section that performs switching between transmitting radio waves from the transmitter section and receiving radio waves from the antenna, and input from the transmission/reception switching section. A mixer that converts the frequency of received radio waves to an intermediate frequency, a local signal generator that creates a local signal for converting the received radio waves to an intermediate frequency, and a receiver section that amplifies the mixer output and outputs it as a video signal. and 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; The interference wave detection circuit receives the signals from the signal processing section mentioned above, and creates interference wave detection gates for searching and tracking, 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 detects clutter, fixed targets, and interference waves in search mode. In tracking mode, when other targets or clutters approach the vicinity while moving with the tracked target, the position of the interference wave detection gate is adjusted so that interference waves can be distinguished from interference waves. and an interference wave display section that receives the output of the interference wave detection circuit and displays the presence or absence of interference waves. Device.