Radar test system for collision avoidance automotive radar

Claim 3

The method of claim 1, wherein the step of delaying the intermediate frequency signal is provided utilizing a time delay device.

Claim 4

The method of claim 2, wherein the time delay device is a Bulk Acoustic Wave Delay Device.

Claim 5

The method of claim 1 further comprising the steps of: providing the intermediate frequency signal to a spectrum analyzer; and measuring the frequency of the intermediate signal using the spectrum analyzer to determine if the signal provided from the collision avoidance radar system is within a desired frequency range.

Claim 6

The method of claim 1 further comprising the steps of: providing the intermediate frequency signal to a power meter; and measuring power of the intermediate signal using the power meter to determine power of the signal provided from the collision avoidance radar system.

Claim 7

The method of claim 1 further comprising the step of: amplifying the intermediate frequency signal so that in combination with the step of delaying the intermediate frequency signal, the conditioned signal will simulate gain and delay for a radar return from a predetermined sized object located a predetermined distance from the collision avoidance radar system.

Claim 12

A radar test system for testing a collision avoidance radar, the radar test system comprising: a downconverter having a first input coupled to provide a received signal from the collision avoidance radar, a second input and an output; an upconverter having an output coupled to provide a transmitted signal to the collision avoidance radar, a first input and a second input; a local oscillator for providing a signal to the second input of the downconverter and the upconverter; and switches for selectively coupling one of at least two delay elements from the output of the downconverter to the first input of the upconverter, wherein frequency changes in the transmitted signal relative to the received signal are substantially due to a physical delay created by one of the delay elements.

Claim 13

A radar test system for testing a collision avoidance radar, the radar test system comprising: a downconverter having a first input coupled to provide a received signal from the collision avoidance radar, a second input and an output; an upconverter having an output coupled to provide a transmitted signal to the collision avoidance radar, a first input and a second input; a local oscillator for providing a signal to the second input of the downconverter and the upconverter; and switches for selectively coupling one of at least two delay elements from the output of the downconverter to the first input of the upconverter, wherein frequency changes in the transmitted signal relative to the received signal are substantially due to a physical delay created by one of the delay elements.

Claim 14

The radar test system of claim 9, wherein one of the delay elements comprises a Bulk Acoustic Wave delay line.

Claim 15

The radar test system of claim 10, wherein one of the delay elements comprises a through line.

Claim 16

The spectrum analyzer of claim 9 further comprising: a coupler having a through path coupling the output of the downconverter to the switches, and a coupling path terminal; a power divider having an input coupled to the coupling path terminal of the coupler, a first output and a second output; a spectrum analyzer coupled to the first output of the power divider; and a power meter coupled to the second output of the power divider.

Claim 17

The spectrum analyzer of claim 9 further comprising an amplifier coupling the switches to the first input of the upconverter.

Claim 18

A radar test system for testing a collision avoidance radar, the radar test system comprising: a duplexer having a first terminal, a second terminal and a third terminal; an antenna for receiving a signal from the collision avoidance radar system; a 45 degree twist coupling the antenna to a first terminal of the duplexer; a downconverter having a first input, a second input and an output; an upconverter having an output, a first input and a second input; a local oscillator for providing a signal to the second input of the downconverter and the upconverter; switches for selectively coupling one of a bulk acoustic wave delay line, and a through line from the output of the downconverter to the first input of the upconverter; a series connected high pass filter and low pass filter coupling a second terminal of the duplexer to the first input of the downconverter; a coupler having a through path with a first terminal coupled to the output of the downconverter and a second terminal, and a coupling path terminal; a power divider having an input coupled to the coupling path terminal of the coupler, a first output and a second output; a spectrum analyzer coupled to the first output of the power divider; a power meter coupled to the second output of the power divider; a band pass filter having an input coupled to the second terminal of the through path of the coupler and an output coupled to the switches; a series connected amplifier and filter coupling the switches to the first input of the upconverter; and a band pass filter coupling the output of the upconverter to the third terminal of the duplexer.

Claim 19

A radar test system for testing a collision avoidance radar, the radar test system comprising: a duplexer having a first terminal, a second terminal and a third terminal; an antenna for receiving a signal from the collision avoidance radar system; a 45 degree twist coupling the antenna to a first terminal of the duplexer; a downconverter having a first input, a second input and an output; an upconverter having an output, a first input and a second input; a local oscillator for providing a signal to the second input of the downconverter and the upconverter; switches for selectively coupling one of a bulk acoustic wave delay line, and a through line from the output of the downconverter to the first input of the upconverter; a series connected high pass filter and low pass filter coupling a second terminal of the duplexer to the first input of the downconverter; a coupler having a through path with a first terminal coupled to the output of the downconverter and a second terminal, and a coupling path terminal; a power divider having an input coupled to the coupling path terminal of the coupler, a first output and a second output; a spectrum analyzer coupled to the first output of the power divider; a power meter coupled to the second output of the power divider; a band pass filter having an input coupled to the second terminal of the through path of the coupler and an output coupled to the switches; a series connected amplifier and filter coupling the switches to the first input of the upconverter; and a band pass filter coupling the output of the upconverter to the third terminal of the duplexer.