JPS61157870U - - 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, Fig. 3 is a time chart of a jamming detection trigger, and Fig. 4 is a conventional jamming detection circuit. Trigger time chart FIG. 5 is a configuration diagram of a conventional radar device. In the figure, 1 is an antenna, 2 is a TR tube, 3 is a transmitter section, 4 is a coupler, 5 is a mixer, 6 is a receiver section, 7 is a video distributor, 8 is a signal processing section,
9 is a local signal generation section, 10 is a jamming detection circuit, 11 is an F/A, F/F switching circuit, 12 is a jamming display section, 13 is an F/A, F/F switching switch, 14A input 1 is a video input, 14B input 2 is a transmission trigger input, 15 is a video distributor, 16 is a receiver/driver, 17A to 17F are buffer amplifiers (BF in the figure), 18A to 18C are trigger generators (TG in the figure), 19A to 19C are Gate circuit (GATE in the figure), 20A to 20C are stretch circuits (Stretch in the figure), 21A to 21C
is a comparator (COMP in the figure), 22 is a 3-input NAND circuit, 23 is a 3-input OR circuit, 24 is a 2-input NAND circuit, 25A output 1 is the CW jamming display and switching signal output, 25B output 2 is the pulse jamming Display and switching signal output, 26 is a transmission trigger, 27 is an effective reception range, 28 to 30 are jamming detection gate triggers according to the present invention,
31 is a conventional jamming detection gate trigger. It should be noted that the same or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] A radar device that has the function of not only searching or tracking a target but also detecting interference waves from the target includes a transmitter unit that generates a high-frequency power pulse, and a transmitter unit that emits the high-frequency power pulse to the outside as a transmitted radio wave. a transmitting/receiving antenna that receives reflected waves and jamming waves from a target; a transmitting/receiving switch that performs switching between transmitting radio waves from the transmitter section and receiving radio waves from the antenna;
a mixer that converts the received radio waves input from the transmission/reception switch into an intermediate frequency band; a local signal generator that generates a local signal for converting the received radio waves into the intermediate frequency band by the mixer; and the transmitter. a loop coupler for taking out a part of the output from the section and inputting it to the local signal generating section;
a receiver section that amplifies the intermediate frequency signal of the mixer output and then outputs it as a video signal; a video distributor that distributes the output of the receiver section; and a receiver section that receives the output from one of the video distributors and performs distance tracking and A signal processing section that performs angle tracking processing, an interference wave detection circuit that inputs the other output of the video distributor and detects pulse interference waves or continuous waves, and receives the output of the interference wave detection circuit. an interference wave display section that displays either pulse interference waves or continuous wave interference waves; a changeover switch that switches between variable transmission frequency mode and fixed transmission frequency mode (moving target display and tracking mode); It consists of a switching circuit that logically ORs the output of the wave detection circuit and the output of the above-mentioned changeover switch to switch the transmission mode. It is possible to determine whether the interference is a continuous wave, and automatically switch to variable transmission frequency mode when it is a pulse interference wave, and to fixed transmission frequency mode (moving target display and tracking mode) when it is a continuous wave interference. Characteristic radar equipment.