Odd‐order probe correction technique for spherical near‐field antenna measurements

Abstract

[1] In this paper, an odd-order probe for spherical near-field antenna measurements is defined. A probe correction technique for odd-order probes is then formulated and tested by computer simulations. The probe correction for odd-order probes is important, since a wide range of realistic antennas belongs to this class. To the authors' knowledge, the proposed technique is the first practical high-order probe correction technique that has been formulated in detail, has been tested, and has been shown to work.Citation: Laitinen, T. A., S. Pivnenko, and O. Breinbjerg (2005), Odd-order probe correction technique for spherical near-field antenna measurements, Radio Sci., 40, RS3009,

Double $\phi$-Step $\theta$-Scanning Technique for Spherical Near-Field Antenna Measurements

“…In the case of the and scanning techniques [1], the obtainable computational complexity of the probe correction is for a first-order probe, and it is for an odd-order probe [3]. However, in the case of an arbitrary probe, the computational complexity is for the scanning [5] while it becomes for the scanning.…”

“…1) Sampling Criteria: The number required angles for the double -step -scanning technique, , must be chosen as follows: (3) and, as previously mentioned, this must be an odd integer. The number of samples in , must be chosen as follows:…”

“…Here is proportional to the radius of antenna under test (AUT) minimum sphere in wavelengths. Recently, a probe correction technique for odd-order probes, for which the computational complexity is , has been presented in [3].…”

Theory and Practice of the FFT/Matrix Inversion Technique for Probe-Corrected Spherical Near-Field Antenna Measurements With High-Order Probes

“…In fact, several high-order probe correction techniques have been introduced recently [3]- [10]. Some of these techniques are based on the spherical wave expansion of the AUT and probe fields and involve spherical wave translations in the transmission formula [3]- [6], [8], [9]. As opposed to these, the techniques [7], [10] are based on another type of an expansion involving a plane-wave translation operator in the transmission formula.…”

“…The use of a high-order probe correction technique allows a greater flexibility in choosing a probe that leads to an optimal compromise between the desired properties of the probe, for example, the bandwidth, the weight, the size, and the cost. In fact, several high-order probe correction techniques have been introduced recently [3]- [10]. Some of these techniques are based on the spherical wave expansion of the AUT and probe fields and involve spherical wave translations in the transmission formula [3]- [6], [8], [9].…”