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Design of a Miniaturized Rectangular Multiturn Loop Antenna for Shielding Effectiveness Measurement
Sangwoon Youn1, Tae Heung Lim1, Eunjung Kang1
1School of Electronic and Electrical Engineering, Hongik University, 04066 Seoul, Korea.
Sensors (Basel, Switzerland)
|June 7, 2020
Summary
A new miniaturized loop antenna sensor using ferrite was developed for VLF-HF bands. It shows promise for measuring shielding effectiveness in small enclosures.
Area of Science:
- Electromagnetics and Antenna Engineering
- Sensor Technology
- Materials Science (Ferrite)
Background:
- Development of compact antenna sensors for electromagnetic measurements.
- Need for accurate characterization of shielding effectiveness in small enclosures.
- Exploration of ferrite materials for enhanced antenna performance.
Discussion:
- The proposed miniaturized rectangular loop antenna sensor integrates a multiturn wire with a cuboid ferrite core.
- Fabrication and testing confirm its feasibility across very low frequency (VLF) to high-frequency (HF) bands.
- Antenna factor (AF) measurements demonstrate significant performance, with values around 31.8-33.1 dB at 30 kHz.
Key Insights:
- The antenna sensor achieved measurable antenna factor levels, validating its design for VLF-HF applications.
- Successful application in shielding effectiveness (SE) measurements of a commercial cabinet highlights its practical utility.
- Observed SE values of 4.1 dB (horizontal) and 12 dB (vertical) polarization indicate its capability for characterizing small enclosures.
Outlook:
- Further optimization of the antenna sensor design for broader frequency ranges and improved sensitivity.
- Exploration of its application in diverse electromagnetic compatibility (EMC) testing scenarios.
- Potential for integration into portable or embedded measurement systems for real-time monitoring.
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