Comment on “Electromagnetic Radiation under Explicit Symmetry Breaking”

Simovski, Constantin; Miroshnichenko, Andrey E.; Belov, Pavel A.; Krasnok, Alex

doi:10.1103/physrevlett.115.119701

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Second, y-directed electric fields leak from the high permittivity DR into the gap and the continuity of the vertical component of the displacement fields leads to field amplification. We note here that the near and far field radiation of open topology DRs is still a controversial issue (see for example [47] and comment [48]) and a more detailed analysis of the underlying physics is outside the scope of this article. In figure 3, the position and numbering of the high rms field antinodes is also shown.…”

Section: Em Response and Early Transientsmentioning

confidence: 97%

Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators

Kourtzanidis

Raja

2017

Plasma Sources Sci. Technol.

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We report on a computational modeling study of small scale plasma discharge formation with rectangular dielectric resonators (DR). An array of rectangular dielectric slabs, separated by a gap of millimeter dimensions is used to provide resonant response when illuminated by an incident wave of 1.26 GHz. A coupled electromagnetic (EM) wave-plasma model is used to describe the breakdown, early response and steady state of the argon discharge. We characterize the plasma generation with respect to the input power, background gas pressure and gap size. It is found that the plasma discharge is generated mainly inside the gaps between the DR at positions that correspond to the antinodes of the resonant enhanced electric field pattern. The enhancement of the electric field inside the gaps is due to a combination of leaking and displacement current radiation from the DR. The plasma is sustained in over-critical densities due to the large skin depth with respect to the gap and plasma size. Electron densities are

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Section: Em Response and Early Transientsmentioning

confidence: 97%

Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators

Kourtzanidis

Raja

2017

Plasma Sources Sci. Technol.

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“…Nowadays, there are mainly three kinds of common electric small antennas, which are electric oscillator-type antenna, magnetic oscillator-type antenna and combination-type antenna. ey are achieved through the integrated use of composite structural materials, multipoint feeds, coaxial chokes, and other technologies [5,6]. e bandwidth and gain of the antenna can be increased by these techniques.…”

Section: Introductionmentioning

confidence: 99%

Research on Permanent Magnet-Type Super-Low-Frequency Mechanical Antenna Communication

Wang

Zhang

Zhou

et al. 2021

International Journal of Antennas and Propagation

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In the super-low-frequency ( 30 ∼ 300 Hz ) band communication, the traditional antenna covers a large area and has low radiation efficiency. The excitation of electromagnetic waves by the mechanical motion of permanent magnets enables miniaturized technology for super-low-frequency communication. For this miniaturization technique, this paper proposes a super-low-frequency communication architecture framework. Theoretical analysis and experimental verification of each unit module in the structural framework are carried out to achieve high-quality communication. For the radiation unit, permanent magnet parameters and communication distances are introduced to establish a rotating permanent magnet radiation power analysis model and to study the radiation characteristics of rotating permanent magnets. For the receiver unit, a sensitivity normalization characterization method based on the ratio of the coil thermal noise voltage to the induced voltage is proposed. Based on the sensitivity analysis model, a square coil was developed that meets the communication requirements of a mechanical antenna and an experimental platform was built. Experiments are conducted on the factors affecting radiated power and coil sensitivity, and 2FSK signal modulation communication experiments are conducted to verify the feasibility of the communication structure framework. The volume of the mechanical antenna permanent magnets in the experiment is all below 10 cm3, and the operating frequency is continuously adjustable from 0 to 250 Hz. The experimental results show that the near-field radiated power of a rotating permanent magnet is proportional to square of the volume of the rotating permanent magnet; the sensitivity of the coil is proportional to the number of turns and the area of the coil. By controlling the speed in real time, you can control the frequency of the signal and modulate it.

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Sinha and Amaratunga Reply:

Sinha

Amaratunga

2015

Phys. Rev. Lett.

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Comment on “Electromagnetic Radiation under Explicit Symmetry Breaking”

Cited by 4 publications

References 8 publications

Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators

Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators

Research on Permanent Magnet-Type Super-Low-Frequency Mechanical Antenna Communication

Sinha and Amaratunga Reply:

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