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Aliasing01:18

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Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
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Enhanced Gain Extrapolation Technique: A Third-Order Scattering Approach For High-Accuracy Antenna Gain, Sparse

Joshua A Gordon1, Benjamin L Moser1

  • 1National Institute of Standards and Technology, Boulder CO 80305.

IEEE Transactions on Antennas and Propagation
|January 28, 2025
PubMed
Summary
This summary is machine-generated.

A new enhanced three-antenna gain extrapolation technique determines antenna gain with fewer data points and closer distances. This method incorporates third-order scattering, improving efficiency and reducing facility size requirements for antenna measurements.

Keywords:
Antennaantenna gaingaingain extrapolationsparse measurements

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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.