JPS62124578U - - 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 selector circuit, 28 is a jamming detection gate signal in search mode, 29 is a jamming detection gate signal in tracking mode, 30A to 30
B is a variable resistor for setting the gate position, 31 is a transmission trigger, 32 is an R gate, 33 is a tracking target, 34 is a tracking gate (front), 35 is a tracking gate (rear), 3
6 is the acquisition (post) gate. It should be noted 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; A detection gate is created outside the effective reception range in the search mode by receiving signals from the interference wave detection circuit and the signal processing unit mentioned above for search and tracking, and detection gates are installed before and after the tracking gate. a gate creation circuit that creates a gate and outputs the gate to the interference wave detection circuit, a switching circuit that switches the interference wave detection gate in tracking mode and search mode, and a switching circuit that switches the interference wave detection gate in tracking mode and search mode; A disturbance detection gate position setting circuit that can arbitrarily move and set the position of the disturbance detection gate in order to distinguish between interference waves and other objects when other targets or clutters approach, and What is claimed is: 1. A radar device comprising: an interference wave display unit that receives a detection circuit output and displays the presence or absence of interference waves.