JPS6286571U - - 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 a random signal generation circuit, Fig. 3 is a block diagram showing a conventional radar device, and Fig. 4 is a block diagram showing a diode noise generation circuit. FIG. 5 is a diagram showing a diode noise waveform and a sampling waveform in the diode noise generation circuit. In the figure, 1 is an antenna, 2 is a transmitter section, 3 is a TR section, 4 is a MIX (IF mixer), 5 is a receiver section, 6 is a signal processing section, 7 is an L/O generation section, 8
is the COHO generation part, 9 is P, D (power divider),
10 is a multiplier, 11 is a changeover switch, 12 is a VC
O, 13 is a VCXO, 14 is a diode generation circuit, 15 is a conventional carrier wave control section, 16 is a random signal generation circuit, 17 is an invented carrier wave control section, 18 is a Zener diode, 19 is a fixed resistor, 20 is a capacitor , 21 is an amplifier, 22 is a variable resistor for offset adjustment, 23 is a variable resistor for gain adjustment, 24 is a conventional gate creation circuit, and 25 is an S/H (
26 is a BF (buffer amplifier), 27 is an A/D converter, 28 is an encoder, 29 is an F/F (flip-flop), 3
0 is a decoder, 31 is an OSC (oscillator), 32 is a CTR (counter), 33 is an invented gate creation circuit, 34 is a D/A converter, 35 is a diode noise waveform, 36 is a sampling waveform of 35,
37 is an induced diode noise waveform, and 38 is a sampling waveform of 37. 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 having a function of searching or tracking a target while randomly changing a frequency, comprising a transmitter unit that generates a high-frequency power pulse by multiplying a carrier wave, and radiates the high-frequency power pulse to the outside as a transmission wave, Input signals are also input from a transmitting/receiving antenna that receives reflected waves from the target, a transmitting/receiving switching section that performs switching between transmitting radio waves from the transmitter section and receiving radio waves from the antenna, and the transmitting/receiving switching section. a mixer that converts the received radio waves into an intermediate frequency, a receiver section that amplifies the signal from the mixer and outputs it as a video signal, and a signal processor that performs various signal processing upon receiving the signal from the receiver section. , a local signal generation section that creates a local signal for frequency conversion in the mixer, and a reference intermediate frequency necessary to perform phase detection and detect Doppler components when using the moving target display function. A stable signal generator that includes a coherent signal generator that creates a signal, a voltage-controlled oscillator that is required as a carrier wave for the transmission wave and local signal in frequency agility mode, and multiple fixed-frequency crystal oscillators that are necessary for moving target display mode. a quartz crystal oscillator section, a changeover switch that switches the carrier wave between the two modes, a multiplier that multiplies the frequency of the carrier wave, and power that distributes the output of the multiplier to the transmitter section and the local signal generator section. It is comprised of a distributor, a random signal generation circuit that randomly changes the frequency of the carrier wave, and a carrier wave control section that receives a signal from the random signal generation circuit and controls the voltage controlled oscillator and the stabilized crystal oscillator section. A radar device comprising a random signal generating circuit which is a maintenance-free digital circuit for randomly changing the transmission frequency of the radar device.