PSR Target Injection

The Radar Target Generator (RTG10xx) is designed to generate primary radar returns. It can be placed in the field (Remote Test Target) or connected to a radar (on site target injection).

In all cases, the RTG will detect and preserve the radar pulse, apply a fixed and highly precise delay and retransmit the pulse with the appropriate power, pulse-width, frequency and Doppler shift. This is a high fidelity simulation of real targets and allows for precise scenarios for testing. For optimal operation, an accurate test system should allow constant and extensive monitoring. For this the RTG is equipped with several monitoring timestamping and recording functions.

Specifications:

Frequency band Frequency range
RTG1002L/S band1001MHz .. 3450MHz
RTG1062C band4200MHz .. 6400MHz
RTG1063X band8.7GHz to 10.5GHz
RTG1085UHF band400MHz to 460MHz

Product highlights:

  • A correct Doppler is guaranteed on all frequencies even in agile mode. This is very advantageous on radar systems that resolve the Doppler ambiguity, on different frequencies.
  • The RTG can modulate the output power according to the received input power (adaptive beam modulation), even when the radar operates with frequency agility.
  • When used on-site the RTG is directly connected to the radar. In this way multiple targets can be generated in various directions on top of the existing radar environment and the current clutter situation.
  • For Remote Test Target (RTT) usage the RTG is deployed in the field testing the complete radar system including the antenna. The simulated target can be fixed or moving radially. The fixed target can appear as point clutter (no Doppler) or can have a simulated Doppler frequency.

The Optical Delay Line (ODL1263) can be used to delay a microwave pulse from the radar transmitter at a fixed delay with maximum signal level, this pulse will be injected into the radar receiver under test. In this setup the stability of the radar system can be measured. The optical delay line was designed to maximise the signal to noise ratio at the output.

A typical ODL1263 configuration contains 1 coil of optical fiber with a delay of 222 microseconds. Optionally, three delays can be generated for the radar under test: 33.33, 66.66 and 100km on the radar display. Every additional piece of delay line will decrease the signal to noise ratio with 2dB. So at 100km 72dB SNR is still possible! This will allow testing beyond the limits of the earths atmosphere (65dB).

Many airfields with primary radar installations use active reflectors in order to check the geographical alignment of the PSR video with the touchdown points, runway crossing points, etc. The active reflector (also known as a stationary target) must produce a "Doppler" shift such that the stationary target passes through the MTI/MTD processor and is presented on the radar screen of the Air Traffic Controller. This is exactly what the Intersoft Electronics® MTI Marker can offer.

Specifications:

Primary target at fixed rangeFrom -20dBz to 5dBz (determined by pick-up antenna)
Low power consumptionBattery operated for >5 year
Frequency range1GHz .. 10GHz (specified on order)
Directional antennaChosen according to radar type, polarisation and RCS