Open AccessMeasurement Guideline of Fresnel‐Field Antenna Measurement Method
Author(s) -
Oh SoonSoo,
Moon JungIck
Publication year - 2009
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.09.0208.0235
Subject(s) - antenna aperture , optics , antenna (radio) , aperture (computer memory) , fresnel number , antenna factor , antenna measurement , fresnel zone , square (algebra) , physics , radiation pattern , acoustics , mathematics , telecommunications , engineering , geometry , diffraction
In this letter, a parametric analysis of the Fresnel‐field antenna measurement method is performed for a square aperture. As a result, the optimum number of Fresnel fields for one far‐field point is guided as M opt =N opt =D 2 /λR+5, where D is the antenna diameter, λ is the wavelength, and R is the distance between the source antenna and the antenna under test. For the aperture size 5 ≤ L x /λ ≤ 20, the tolerable distances for gain errors of 0.5 dB and 0.2 dB can be guided as R 0.5 dB ≈ 1.2L x /λ and R 0.2 dB ≈ 2.0L x /λ, where L x is the lateral length of the square aperture. The tolerable distances for 20 ≤ L x /λ ≤ 200 are also proposed. This measurement guideline can be fully utilized when performing the Fresnel‐field antenna measurement method.