JPH0381581U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a configuration diagram showing an embodiment of this invention, Figure 2
The figure is a detailed configuration diagram of the receiver of this invention, and Figure 3 is a circuit diagram of a defruter as an example of this invention.
Fig. 4 is an explanatory diagram showing the transmission frequency scanning method of this invention, Fig. 5 is a received video waveform diagram before A/D conversion, Fig. 6 is a comparison circuit output waveform diagram compared with threshold 1, 7 is a diagram of the output waveform similarly compared with threshold 2, FIG. 8 is a diagram of the output waveform similarly compared with threshold 3, and FIG. 9 is a diagram of the configuration of the random control section of this invention.
FIG. 0 is a configuration diagram of a conventional radar device. In the figure, 1 is an antenna for transmitting and receiving, 2 is a circulator, 3 is a transmitter section, 4 is a stabilizing oscillator section, 5 is a receiver according to this invention, 6 is a local signal generation section, 7 is a signal processing section, 8 is a defruter circuit, 9 is a variable threshold circuit, 10 is a control section, 11 is MIX, 12 is FIL, 13 and 16 are I
F AMP, 14 is DIV, 15 is GAT, 17
is DET, 18 is VID AMP, 19 is high frequency receiver input, 20 is local signal, 21 is power divider output or defruter circuit input, 22 is defruter circuit output, 23 is receiver output signal, 24,
33 is a DRV, 25 is a DET, 26 is an A/D converter, 27 is a comparison circuit, 28 to 31 are delay lines, 32 is a mismatch circuit, 34 is an OSC, 35 is a gate circuit, 36, 37, and 41 are counter circuits ,3
8 and 40 are latch circuits, 39 and 42 are ROMs, 4
3 is a BUF circuit, 44 is a system pre-trigger signal, 45 is an output signal of the random control section of this invention,
46 is a conventional receiver. 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 has the function of searching for, detecting, and tracking a target, there is a shared antenna for transmitting and receiving that emits transmitted radio waves to the outside and receives reflected waves from the target, and a circulator that isolates transmitting and receiving. , a transmitter section that outputs high-frequency power pulses, a stabilizing oscillator section having a plurality of stabilizing oscillators with fixed frequencies within the occupied bandwidth of the transmission frequency, and after converting the input from the antenna into an intermediate frequency signal, A receiver section that receives a signal from a defruter circuit (described later), removes the asynchronous signal at an intermediate frequency stage, and then outputs it as a video signal, and a receiver section that receives a signal from the stabilizing oscillator section and uses it in the receiver section. A local signal generation section generates a local signal to be used, and a signal processing section receives the output from the receiver section and performs search video detection, angle tracking, and distance tracking. A deruter circuit that performs inter-hit correlation processing within the receiver to prevent the receiver from being saturated by asynchronous signals, etc., and further correlates the input video in the hit direction corresponding to randomly changing frequencies; A variable threshold circuit that determines the signal level for inter-hit correlation processing, and a frequency switching signal that scans randomly in steps for each hit, with one period having steps equal to the number of oscillators in the stabilizing oscillator section, are used to stabilize the frequency switching signal. 1. A radar device comprising a random control section that outputs an output to an oscillator section.