Enhanced Gain Extrapolation Technique: A Third-Order Scattering Approach For High-Accuracy Antenna Gain, Sparse...

Area of Science:

• Electromagnetics and Antenna Theory
• Measurement Science and Metrology

Background:

• The traditional three-antenna gain extrapolation technique has been standard for over 50 years.
• This method requires numerous data points and large distances, isolating only direct antenna coupling by ignoring higher-order scattering.

Purpose of the Study:

• To introduce an enhanced three-antenna gain extrapolation technique.
• To significantly reduce data points and measurement distances compared to the traditional method.

Main Methods:

• Developed a theoretical foundation incorporating third-order scattering.
• Experimental validation using NIST reference standard gain horn antennas at X-band and Ku-band.

Main Results:

• The enhanced technique requires as few as 10 data points per antenna pair, compared to 4000-8000 for the traditional method.
• Achieved gain values within ±0.07 dB uncertainty.
• Reduced antenna-to-antenna distances by a factor of three to six.

Conclusions:

• The enhanced technique offers a more efficient and practical approach to antenna gain extrapolation.
• This advancement significantly reduces the required measurement facility size and data acquisition time.