EuCAP 2026 Short Course
Friday April 19, 2026
Short Course Registration
General EuCAP2026 online registration:
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Spherical Near-Field Antenna Measurements – Theory and Practical Implementation
Abstract:
The spherical near-field antenna measurement technique is unique in combining a range of fundamental advantages
that render it the most accurate technique for experimental characterization of antenna radiation. This technique, based
on the comprehensive and well-established theories of the spherical vector wave expansion and the antenna scattering
matrix, can be implemented in numerous different types of measurement facilities, and today it is used globally for
testing of wireless technology from miniscule hearing aid antennas to giant satellite antennas. This tutorial will overview
the theoretical background for the spherical near-field antenna measurement technique and deal with the careful
practical implementation that is essential in realizing the potential of high-accuracy testing. The tutorial will present
several challenging calibration and measurement project and also review recent research in spherical near-field
antenna measurements.
Recommended prerequisites for attendees:
The course requires knowledge and understanding of electromagnetics and antennas at M.Sc. level; participants who
already have experience with antenna measurements will also be able to benefit from the course.
Swing Arm-over-Azimuth Systems more info Learning objectives:
The active course participants will be able to account for:
- The theory of the spherical wave expansion
- The theory of the antenna scattering matrix
- The theory of the spherical transmission formula
- The mechanical alignment requirements for spherical near-field antenna measurements
- Sampling and scanning schemes for spherical near-field antenna measurements
- Range probe requirements for spherical near-field antenna measurements
- Measurement procedures for spherical near-field antenna measurements
- Uncertainty estimation for spherical near-field antenna measurements
- The relationship between theory and practice of spherical near-field antenna measurements
- The fundamental advantages of spherical near-field antenna measurements over other types of antenna measurements.
Course outline:
The 3-hours course will consist of a lecture, small exercises, discussions, and a multiple-choice test. The course contents is structured as follows:
- Introduction to spherical near-field antenna measurements
- Spherical wave expansion and spherical vector waves
- Antenna scattering matrix
- Derivation and solution of spherical transmission formula
- Mechanical positioning configurations
- Sampling criterion and scanning schemes
- Practical measurement considerations
- Misc. topics (modal filtering, SNF system alignment, near-field probes)
- Range uncertainty evaluation
Instructors
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