Modified Wheeler cap method using a quarter-wave transformer
- Resource Type
- Conference
- Authors
- Chiba, Kouta; Fujita, Keisuke
- Source
- 2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2023 XXXVth. :1-3 Aug, 2023
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Geoscience
Photonics and Electrooptics
Robotics and Control Systems
Signal Processing and Analysis
Antenna measurements
Resistance
Shape
Measurement uncertainty
Transforms
Microstrip antennas
Transformers
- Language
- ISSN
- 2642-4339
The Wheeler cap method was used to measure the radiation efficiency of antennas. The conventional method introduces errors in the measurement of radiation efficiency because a small loss resistance is difficult to measure. In this study, we propose a method that combines the Wheeler cap method with a quarter-wave transformer (QWT). The QWT is connected to the antenna to transform its impedance. Numerical validation confirmed that impedance transformation using QWT can transform a small loss resistance to a reasonable value. This would allow the proposed method to measure the radiation efficiency with a better accuracy.