Abstract

Radiated emissions from the noise-generating components in modern electronic devices are a significant concern for both electromagnetic interference and RF interference. Shielding cans are commonly used to suppress emissions from noise sources, but accurate shielding effectiveness evaluation requires a clean, well-defined radiation source that can reliably mimic real emissions for repeatable measurements. Slot-backed microstrip antennas provide a practical alternative to loop antennas, offering zero height, low parasitic radiation, and seamless printed circuit board integration. This article proposes an analytical model for estimating the magnetic dipole moment of slot-backed microstrip structures. The model captures both the discontinuity effects and radiated characteristics using an equivalent circuit. The dipole moment is derived from the voltage across the slot and provides a direct link between the antenna's geometric parameters and its radiated power. The proposed method is validated through both dual TEM cell measurements and full-wave 3-D electromagnetic simulations.

Department(s)

Electrical and Computer Engineering

Publication Status

Early Access

Comments

National Science Foundation, Grant IIP-1916535

Keywords and Phrases

Electromagnetic interference (EMI); equivalent dipole moments; microstrip-to-slotline transition; radiation intensity; slot aperture antenna

International Standard Serial Number (ISSN)

1558-187X; 0018-9375

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

01 Jan 2025

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