Slot aerials and their relation to complementary wire aerials (Babinet's principle)

Booker, Henry G.

doi:10.1049/ji-3a-1.1946.0150

Cited by 215 publications

(123 citation statements)

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“…The field leaked through a slot increases with its maximum diameter and frequency F MHz [38]. The attenuation of a single aperture is approximated by:…”

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confidence: 99%

Electromagnetic Burst Measurement System Based on Low Cost UHF Dipole Antenna

et al. 2017

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Non-linear high-power devices produce electromagnetic noise (EMN) sources of great intensity that can disrupt and damage the surrounding electrical equipment and devices. This radiative phenomenon is very common at facilities where pulsed power generators are required, particularly those that are needed to produce dense transient plasma experiments. These conditions are found at the Chilean Nuclear Energy Commission (CCHEN), due to the presence of pulsed power generators that switch large currents (kA-MA) in short times (10-100 ns). In order to characterize and establish conditions to mitigate the effects of the EMN on nearby devices, a measurement system based on an ultra-high frequency (UHF) dipole antenna was developed. We evaluated the system measuring the EMN emanated from a plasma focus device, the PF-400J. Measurements at the place indicated broadband and intense electric fields that can couple to nearby cables and equipment (10-300 MHz bandwidth, up to 350 V/MHz spectral intensity, 100 V coupled voltage). Based on these measurements a compact and simple protection system was designed, built and tested, capable of effectively mitigating the high levels of EMN. The proper EMN impact mitigation indicates the correct operation of the suggested system. The developed system can be of interest to the energy community by facilitating EMN measurement produced by arc discharges.

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“…The field leaked through a slot increases with its maximum diameter and frequency F MHz [38]. The attenuation of a single aperture is approximated by:…”

mentioning

confidence: 99%

Electromagnetic Burst Measurement System Based on Low Cost UHF Dipole Antenna

et al. 2017

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“…6 (b). Equation (1) had been already obtained in Japan to obtain the input impedance of slot antennas earlier than the paper of Booker [16] as pointed out by Mushiake [17], and the paper by Asami et al [18] was a more detailed report of the unpublished earlier paper. However, the structures reported in these papers had been restricted for the thin slot antennas and the thin wire antennas.…”

Section: Self-complementary Antennasmentioning

confidence: 99%

Historical Review of Research and Development of Linear Antennas in Tohoku University

Sawaya

2015

IEICE Trans. Electron.

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SUMMARYInvention and development of the Yagi-Uda antenna in Tohoku University, Japan are described. Communication experiments in VHF and UHF frequency bands using transmitter and receiver developed in the same university as well as the Yagi-Uda antenna are also presented. Then, self-complementary antennas, which is the frequency independent antenna invented in Tohoku University are described. Analysis methods of large loop antennas is also presented.

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“…Booker's widely recognized relation of Z metal Z slot = η 2 /4 for Babinet's principle in electromagnetic fields [37,38] can be used to benchmark the proposed parallel slotline model, where Z metal and Z slot are the input impedances of metal and slot radiating modes, respectively, and η is the intrinsic impedance. This principle is of fundamentally importance and can be applied to find the impedance for a wide variety of complementary structures.…”

Section: Babinet's Principlementioning

confidence: 99%

Travelling Wave Mechanism and Novel Analysis of the Planar Archimedean Spiral Antenna in Free Space

Chen¹,

Huff²

2014

PIER

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Abstract-While Archimedean spiral antennas were invented a half-century ago, only selfcomplementary impedance can be evaluated directly from the Babinet's principle. This paper examines the effects of metal width and arm spacing on printed spiral's input impedance. A model is proposed based on examination by decomposition of planar spiral. A closed-form expression for the input impedance of Archimedean spiral antenna is obtained by evaluating the proposed model with conformal mapping techniques. Full-wave numerical simulations, Babinet's principle, and a fabricated antenna demonstrate the accuracy of the proposed model. The expression in this work can be used to find the impedance of a variety of spiral complementary structures analytically. The examination and discussion on the effects of other parameters and features in addition to the spiral itself are also provided through numerical simulation.

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Slot aerials and their relation to complementary wire aerials (Babinet's principle)

Cited by 215 publications

References 0 publications

Electromagnetic Burst Measurement System Based on Low Cost UHF Dipole Antenna

Electromagnetic Burst Measurement System Based on Low Cost UHF Dipole Antenna

Historical Review of Research and Development of Linear Antennas in Tohoku University

Travelling Wave Mechanism and Novel Analysis of the Planar Archimedean Spiral Antenna in Free Space

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