Propagation in a Ferrite Circular Waveguide Magnetized Through a Rotary Four-Pole Magnetic Field

Mazur, Mateusz; Sędek, E.; Mazur, J.

doi:10.2528/pier06072002

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…The Federal Communication Commission in the USA permitted the marketing and operation of UWB within the range 3.1 GHz to 10.6 GHz, including VSWR less than 2, omnidirectional radiation patterns, minimum distortions in the received waveforms, etc. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Small Printed Ultra-Wideband Antenna with Subband Rejection Capability

Zhang

Yan

et al. 2008

Journal of Electromagnetic Waves and Applications

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A small printed antenna is described with subband rejection for ultrawideband (UWB) applications [1]. Two notches are incorporated in the radiating structure of the antenna to act as a bandstop filter to reject the undesired subband within the whole bandwidth [2]. The designed antenna features a compact size of 26×25 mm 2 , and satisfies the VSWR requirement of less than 2.0 in the frequency band from 3 GHz to more than 12 GHz excluding any undesired subband such as 4.65-5.65 GHz. Good monopole-like radiation patterns and antenna gains have also been obtained.

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Section: Introductionmentioning

confidence: 99%

Small Printed Ultra-Wideband Antenna with Subband Rejection Capability

Zhang

Yan

et al. 2008

Journal of Electromagnetic Waves and Applications

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“…Thus, development of effective analytical approaches for BLDC motor design syntheses continues to attract great attention from researchers, e.g., [9]. The synthesized procedure to achieve the flux density distribution for special motor with the help of numerical methods has been widely used [10,11]. For instance, it can be used to estimate the back electromotive force (EMF) and the inductance of the stator windings [12], the frequency spectra of the magnetic induced forces which signify the magnetically induced vibration sources [13], the running torque, and some other aspects of the permanent magnet (PM) motor performances [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Fem Analysis for a Novel Configuration of Brushless Dc Motor Without Permanent Magnet

Moradi¹,

Afjei²,

Faghihi³

2009

PIER

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This paper describes the design and analysis of a novel configuration for Brushless DC (BLDC) motor. This new structure does not use a permanent magnet in the rotor which highlights this family of BLDC motors in comparison with conventional BLDC motors. The proposed configuration consists of two magnetically dependent stator and rotor sets, in which each stator set includes nine salient poles with windings wrapped around them, and the rotor comprises of six salient poles. The magnetic field passes through a guide to the rotor then the stator and finally completes its path via the motor housing. Finite Element (FE) analysis has been carried out to confirm the accuracy of the predicted flux-linkage characteristics, which play a key role in the design process. Furthermore, the abbreviation of the evaluation method based on 3-D field solution is introduced. It provides not only confirmations of the investigation results but also exact illustration for magnetic field distribution for this complex configuration. A prototype BLDC motor is built and its test results validated the design methodology. As a consequence, a design procedure for such a BLDC motor based on new configuration is described and the simulation results are compared with measured values. On the other hand, designing a new structure of BLDC motor is proposed and FE analysis is carried out to confirm the predicted characteristics.

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“…However, the analytical study of the electromagnetic wave propagation in guides partially charged with longitudinally magnetized ferrite presents an appreciable lack and finds difficulties due to the anisotropy of the medium and the coupling of the electromagnetic fields in the equation of propagation [4][5][6][7][8][9][10]. In this article, we present a thorough study of the TOM applied to the case of the anisotropic mediums by considering a tensorial representation of the permeability of ferrite.…”

Section: Introductionmentioning

confidence: 99%

Complex Mode in Rectangular Waveguide Filled With Longitudinally Magnetized Ferrite Slab

Benzina¹,

Sakli²,

Aguili³

et al. 2010

PIER M

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Abstract-In microwaves, ferrites are characterized by a tensorial permeability which represents their anisotropy under a constant magnetic field. We present, in this article, a rigorous study of the formulation of the transverse operator method (TOM) with an extension to the case of the guides of rectangular waves partially charged with longitudinally magnetized ferrite. We show the existence of the complex modes in these types of structures with ferrite. A good agreement of the constant of propagation with the literature is obtained.

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Propagation in a Ferrite Circular Waveguide Magnetized Through a Rotary Four-Pole Magnetic Field

Cited by 7 publications

References 8 publications

Small Printed Ultra-Wideband Antenna with Subband Rejection Capability

Small Printed Ultra-Wideband Antenna with Subband Rejection Capability

Fem Analysis for a Novel Configuration of Brushless Dc Motor Without Permanent Magnet

Complex Mode in Rectangular Waveguide Filled With Longitudinally Magnetized Ferrite Slab

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