JPS62114378U - - Google Patents

Description

[Brief explanation of drawings]

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 unit, 4 is a mixer, 5 is a local signal generation unit, 6 is a receiver unit, 7 is a signal processing unit, 8 is a jamming display unit, 9 is a jamming detection circuit, 10 is a search/tracking switching circuit, 11 is a reception unit Video input, 12A
~12C is a buffer amplifier, 13 is a gate circuit,
14 is a stretch circuit, 15 is a comparison circuit, 16 is a reference voltage, 17 is an output for displaying jamming, 18 is a transmission pretrigger, 19 is a capture gate (front), 20
21 is an inverter; 22A, 22B are AND circuits; 23
A, 23F is a one-shot multivibrator,
24 is an OR circuit, 25 is a selector, 26 is a jamming detection gate in search mode, 27 is a jamming detection gate in tracking mode, 28 is a transmission trigger, 29 is a range gate that determines the effective reception range, 3
0 is the tracking target, 31 is the tracking narrow gate (front), 23
33 is the narrow tracking gate (rear), and 33 is the acquisition gate (rear)
It is. It should be noted that the same or equivalent parts in the figures 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 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 disturbance wave detection circuit to be detected, and interference wave detection gates for receiving signals from the signal processing section for searching and tracking are created separately, and a detection gate is created outside the effective reception range in the search mode, In the tracking mode, a search/tracking switching circuit creates detection gates before and after the tracking gate and outputs the gates to the above-mentioned interference wave detection circuit, and a disturbance wave that receives the output of the above-mentioned interference wave detection circuit and displays the presence or absence of interference waves. A radar device comprising a display section.