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Far Field Testing

Far Field Testing

Two Antenna Testing Methods

Our test lab measures all customer antennas by exciting them with our swept VNA sources and observing their response with a quad-ridge antenna at the other end of our anechoic chamber, often 12 feet away. This is called far field testing, because we observe your antenna’s actual performance from a significant distance.

Far Field

great circle cut antenna testing diagram

2-Axis Positioner

Far field testing is an accurate and natural way to evaluate customer antennas, and makes no assumptions about their operation. It also quantifies feed-line radiation and other unexpected distortions which happen near the antenna.

 

 

 

 

 

Near Field

antenna testing probeSmaller chambers sometimes use “near field scanning”. In this method, a probe (like this one shown) is scanned near and around the antenna under test. The probe results are run through a mathematical algorithm to simulate the approximate far field pattern of the antenna. This method may miss many real world antenna effects such as feed-line distortions. It can be less expensive, and does not require a large anechoic chamber.

 

 

 

 

Let’s Get Started !

Ready to get your antenna project underway … then contact us and see how we can help. A qualified antenna testing company will get your project on track.