JPH0479281U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of this invention, FIG. 2 is a diagram showing a conventional embodiment, and FIG. 3 is an explanatory diagram used to explain FIG. 2. In the figure, A is a distance information signal, B is a speed information signal, C is a reference signal, D is a beam scanning angle signal, E is a beam width signal,
1 is a Doppler generation section, 2 is a mixer section, 3 is a delay circuit section, 4 is a pulse modulation section, 5 is a first calculation section, 6 is a second calculation section, 7 is a first control section, 8 is a variable an attenuation section, 9 a pseudo target signal, 10 a second control section, 11 a switch section, 12 a patch antenna,
13 is an antenna section, 14 is a pseudo target radio wave, and 15 is a fixed attenuation section. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A device that simulates reflected radio waves when radio waves transmitted from a phased array radar to a target are reflected from the target.
In order to give the pseudo target radio waves a motion according to the beam scanning angle of the radar and the beam width of the phased array radar, external equipment sends speed information signals, distance information signals, beam scanning angle signals, and standards as pseudo target information. a Doppler generator that receives the speed information signal and the beam width signal and generates a Doppler signal as a pseudo target signal in response to the speed information signal;
a mixer section that receives the reference signal and connects to the output end of the Doppler generating section; a delay circuit section that receives the distance information signal and determines the delay time of the pseudo target signal; and an output end of the mixer section and the delay circuit section. a pulse modulation section connected to the output end of the pulse modulator for performing pulse modulation; a first calculation section for receiving the beam scanning angle signal and determining the output level of the pseudo target radio wave according to the beam scanning angle; and a first calculation section for receiving the beam width signal. a second calculation section that determines the output level of the pseudo target signal according to the beam width; a first control section that performs control, and a variable attenuation section that is connected to the output end of the pulse modulation section and the output end of the first control section and changes the output level of the pseudo target radio wave according to the beam scanning angle and the beam width. and a second control unit that receives the beam scanning angle signal and determines the position of the pseudo target, and a pseudo target that is the output signal of the variable attenuation unit to the position of the pseudo target determined by the second control unit. A switch section for supplying a signal and a patch antenna arranged in a plane corresponding to the position of the pseudo target determined by the second control section transmit the supplied pseudo target signal, and transmit this as a pseudo target radio wave. In a phased array radar test device consisting of an antenna section, a patch between the variable attenuation section and the antenna section corrects the difference in radio wave attenuation due to the difference in distance from each patch antenna to the phased array radar. A phased array radar test device characterized by having a fixed attenuation section.