Antenna Test Equipment for Pattern Measurement in Less Than a Second
RFxpert is the only real-time, compact, bench-top antenna measurement device.
What is Antenna Pattern?
Text book definition of antenna pattern or antenna radiation pattern is a graphical representation of the radiation properties (e.g. TRP, gain, efficiency, EIRP, directivity, phase or polarization) of the antenna under test (AUT) as a function of space.
Antenna Pattern Measurement Techniques
Until recently, the two dominant approaches for testing and evaluation of antenna parameters were near-field and far-field measurement techniques.
In the near-field range method antenna emissions are measured in the radiating-near-field region. The results are then projected to the far-field with well-developed and proven algorithms e.g. to offset RF reflections, mutual coupling between the AUT and the measurement antenna/probe, etc. This is critical because most antennas are intended to operate in the far-field region.
A direct far-field measurement method can be performed in outdoor or indoor environments. Smaller antennas can be measured in an anechoic chamber. However, testing larger antennas often requires a remote open-air-test-site (OATS) consisting of a large area in a rural environment to avoid reflections.
Both antenna pattern measurement techniques are costly and require longer times for Antenna Designers and Wireless Engineers to debug their designs, to do rapid prototyping, and to explore new designs, materials and geometries.
Novel Approach to Antenna Pattern Measurement:
RFxpert is a desktop antenna pattern measurement system that characterizes antennas without the need for a chamber. It provides far-field patterns, bisections, EIRP and TRP in less than a second. Novel near-field results, including amplitude, polarity and phase give insights into the root causes of antenna performance challenges and help troubleshoot far-field radiation patterns.
How accurate is the result compared to a CTIA anechoic chamber?
RFxpert measures the characteristics of an antenna in one second compared to hours (including the set-up time) in an anechoic chamber. RFxpert accuracy is +/- 1.5dB. Below are comparative test results: