JPS61155781U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of this invention, Fig. 2 is an overall AGC voltage vs. mixer input conversion power characteristic diagram, Fig. 3 is an AGC characteristic diagram of the receiver section, and Fig. 4 is an AGC characteristic diagram of the RFATT. FIG. 5 is a characteristic diagram when switching adjustment from the receiver unit to RF ATT fails, and FIG. 6 is a configuration diagram of a conventional radar device. In the figure, 1 is an antenna, 2 is a loop coupler, 3 is a TR tube, 4 is a transmitter section, and 5 is an RF AT
T, 6 is a mixer, 7 is a receiver section, 8 is a signal processing section, 9 is an L/O section, 10 is an RF BITE, 11 is a W/G switch, and 12 is a dummy load. 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 not only searches for or tracks a target but also has a self-diagnosis function that checks its own radar performance, includes a transmitter unit that generates high-frequency power pulses, and radiates the high-frequency power pulses to the outside as transmitted radio waves. In addition, there is a transmitting/receiving antenna that receives reflected waves from the target, a transmitting/receiving switch that switches between transmitting radio waves from the transmitter unit and receiving radio waves from the antenna, and a transmitting/receiving switch that switches between transmitting radio waves from the transmitter section and receiving radio waves from the antenna, and A variable attenuator that operates when the power is large, a mixer that converts the frequency of received radio waves to an intermediate frequency, a local signal generator that generates a local signal for the mixer, and after amplifying the output of the mixer, the video A receiver section that outputs a signal, a signal processing section that receives the output of the receiver section and performs distance tracking, angle tracking processing, automatic gain control, etc., and between the antenna and the transmitting/receiving switch, A waveguide switch switches between normal use and when checking its own performance, and when checking its own radar performance, it connects to the transmitter/receiver switch through the waveguide switch and generates a pseudo high frequency signal. and a non-reflection terminator connected to the rest of the waveguide switch and terminating the input from the antenna when checking its own radar performance. radar equipment.