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CRPA Testing

Controlled Reception Pattern Antenna Testing

What is a CRPA?  •  Testing a CRPA  •  Anechoic  •  Wavefront  •  Videos  •  Documents

What is a CRPA?

The acronym stands for Controlled Reception Pattern Antenna. CRPAs are designed to reduce the effects of RF interference or establish signals’ angle of arrival. Using multiple antenna elements, they minimize jamming signals, using null generation or null steering or maximize “truth” signals using beam forming or beam steering.

CRPAs are a very useful antenna system for platforms that need to operate in environments where jamming and interference are commonly present. For this reason, CRPAs are becoming increasingly common, particularly in the Defense sector. They are an extremely effective anti-jam/spoof solution, because they adapt dynamically in response to jamming or spoofing signals.

What Makes a CRPA?

CRPAs begin with some sort of multi-element antenna, but the real magic happens within the antenna electronics, where the RF then proceeds downstream to the GPS receiver. These items can be connected to each other in-line or in a single enclosure. Single-enclosure antennas are sometimes called “integrated CRPAs”. Fundamentally, they work the same way.

Ways to Test a CRPA

Testing a CRPA prior to fielding is critical − especially in applications like defense, where the stakes are high. There are several test methods for testing CRPA antennas. You should evaluate these methods, their costs and suitability for the use case to ensure that your needs are fully met.

Record Replay

  • Realistic, actual recorded data – not generated.

  • Unable to make changes, limited test cases.

  • Difficult to find a suitable recording environment.

  • To record threats, you have to go where threats are.

GNSS Simulator

  • Lowest cost option due to advances in technology.

  • Previously very expensive and complex equipment.

  • Innovation now allows us to do some cool things.

  • Flexibility to cover multiple test cases quickly.

Anechoic Chamber

  • A complete anechoic chamber system, including simulation equipment and an actual physical chamber.

  • Very expensive, high effort.

  • Physical limitations and building standards.

  • Several potential unknowns