Design of a Miniaturized Rectangular Multiturn Loop Antenna for Shielding Effectiveness Measurement

Youn, Sangwoon; Lim, Tae Heung; Kang, Eun Kyeong; Lee, Dae-Heon; Kim, Ki Baek; Choo, Hosung

doi:10.3390/s20113178

Cited by 5 publications

(7 citation statements)

References 27 publications

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“…A conceptual geometry of the rectangular multiturn loop antenna in a receiving mode with 𝑁 turns is shown in Figure 1. When an electromagnetic plane wave propagates toward the coil with the incident angle of 𝜃, an open-circuit voltage (𝑉 𝑂𝐶 ) arises, which are influenced by several factors such as the number of turns (𝑁), frequency (𝑓), magnetic field permeability (µ 0 ) and magnetic field density (𝐻) penetrating the loop area [9]- [11]. The relation is formulated in (1).…”

Section: Passive Magnetic Coilmentioning

confidence: 99%

“…Figure 1. Magnetic coil cross-sectional model as a loop antenna [11] Basically, a higher output voltage is more desirable because it will be more readable to the measuring instrument, such as an oscilloscope. Given that the coil area is fixed as governed by the standard, based on (1) increasing the number of turns (𝑁) may seem to be the easiest way to obtain a higher output voltage.…”

Section: Passive Magnetic Coilmentioning

confidence: 99%

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Passive magnetic coil design for electromagnetic interference evaluation of axle counters

Yoppy,

Yudhistira,

Nugroho

et al. 2024

IJECE

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Measurement of magnetic fields near the railway tracks is crucial to ensure compatibility with the operation of axle counters. According to EN 50592 standard, the magnetic field is detected with a passive magnetic coil and an oscilloscope. From previous studies, in general, there has been no in-depth analysis of how the choice of coil winding parameters could affect the coil output voltage, which then affect the measurement sensitivity, in particular the coil design based on the standard and it is applicability for electromagnetic interference (EMI) evaluation of axle counters. Therefore, this paper will explore the design of a passive magnetic coil to obtain the optimum coil output voltage within the frequency range. Simulations showed that for 10-100 kHz and 100 kHz–1.3 MHz range, the optimum number of turns happened at 60-100 and 15-60 turns, respectively. Based on that, two example coils had been built. Simulations and measurements of their frequency response were in good agreement, with a deviation less than 1.0 dB.

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Section: Passive Magnetic Coilmentioning

confidence: 99%

Section: Passive Magnetic Coilmentioning

confidence: 99%

Passive magnetic coil design for electromagnetic interference evaluation of axle counters

Yoppy,

Yudhistira,

Nugroho

et al. 2024

IJECE

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“…A sketch of the antenna plane detected a magnetic field (H) is given in Figure 5 [27]. In addition, the equivalent circuit between the antenna and the measuring instrument (PicoScope) is shown in Figure 6.…”

Section: Data Evaluation Techniquementioning

confidence: 99%

“…The open voltage generated by the antenna (Voc) arises due to the magnetic field that changes in time. Thus, assuming the measured magnetic field is only on perpendicular to the plane of the coil (θ = 90 °), the Voc equation can be written as in (1) [27].…”

Section: Data Evaluation Techniquementioning

confidence: 99%

Electromagnetic interference measurement for axle counters light rapid transit railway in Indonesia

Yudhistira

Yoppy

Trivida

et al. 2022

IJECE

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The measurement and analysis of electromagnetic interference (EMI) from light rapid transit (LRT) axle counters against magnetic field interference in Indonesia has been carried out. The low-cost magnetic sensors were developed according to the British Standard (BS) EN 50592:2016. The measurement setup and magnetic field limit were based on the British Standard EN 50592:2016 and ERA/ERTMS/033281 standard. Two frequency range of the measurements, lower and higher frequencies with two different train running mode, acceleration mode and deceleration mode were applied in this research. The results in lower frequency range (10 to 100 kHz) were very close to the limit value in both acceleration and deceleration mode, especially at the 30 to 50 kHz for the y and z directions. Although there may possibly magnetic interference at low frequencies, most of the magnetic field emissions were still in acceptable range.

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“…the antenna inductance increases in the upper frequency band, which results in worse AF characteristics than a single-turn loop [24]. The ferrite core can improve the radiation efficiency, but has limitations in reducing the size of loop antenna [25]− [27].…”

Section: Introductionmentioning

confidence: 99%

An Electrically Small Frequency Selective Loop Antenna for Shielding Effectiveness Measurement

et al. 2021

Self Cite

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This paper proposes an electrically small and frequency selective loop (FSL) antenna for shielding effectiveness (SE) measurement in low frequency (10 kHz-30 MHz) magnetic fields. The proposed antenna consists of an outer loop and an inner loop. A low-pass filter is placed between outer and inner loop to improve the antenna factor (AF) in the upper frequency band as the number of loop turns increases. The size of the designed antenna is 220 mm  220 mm, which achieves 46 % reduction of the antenna area compared to conventional 300 mm loop antennas and the proposed antenna preserves the AF characteristic over the entire frequency range (10 kHz-30 MHz). In addition, the loop of the designed antenna is printed using microstrip techniques, which reduces the cost and complexity of the antenna fabrication. The results demonstrate that the proposed antenna is suitable for SE measurements of small enclosures (all dimensions between 0.75 m and 2 m). INDEX TERMS Electrically small loop antenna, frequency selective antenna, SE measurement small enclosures

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Design of a Miniaturized Rectangular Multiturn Loop Antenna for Shielding Effectiveness Measurement

Cited by 5 publications

References 27 publications

Passive magnetic coil design for electromagnetic interference evaluation of axle counters

Passive magnetic coil design for electromagnetic interference evaluation of axle counters

Electromagnetic interference measurement for axle counters light rapid transit railway in Indonesia

An Electrically Small Frequency Selective Loop Antenna for Shielding Effectiveness Measurement

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