Optimization of a corrugated millimeter-wave waveguide and a miter bend by FDTD simulation

Nakamura, Hiroaki; Kashima, N; Takayama, A.; Sawada, Keiji; Tamura, Yuichi; Fujiwara, Susumu; Kubo, S.

doi:10.1088/1742-6596/410/1/012046

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…[30][31][32] When electromagnetic waves are injected, mode conversion occurs. 33) The parameters for the FDTD simulation are summarized in Table II.…”

Section: Simulation Methodsmentioning

confidence: 99%

Finite-Difference Time-Domain Simulation on Transmission of Millimeter Waves through Miter Bends

Kashima¹,

Nakamura²,

Takayama³

et al. 2013

Jpn. J. Appl. Phys.

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We have simulated the distribution of electromagnetic (EM) waves through a system composed of miter bends by finite-difference time-domain (FDTD) simulation. To study the effect of mode conversion by miter bends, three shapes of miter bends have been simulated. For the miter bend that has processed grooves inside, the profile of the output EM waves is changed slightly from that of the input wave (HE11 mode). As a result, this case exhibits the best shape of the miter bend in our simulation. In the miter bend without processed grooves inside, the output EM waves change more than in the case of the miter bend with grooves, because mode conversion occurs at the surface in miter bends without grooves. In the simple bend, which changes the direction of EM waves gradually, the profile of the output EM waves is deformed and the input profile is not conserved. Comparing the above three cases, we found that the grooves lead to more efficient to conservation of the profile of EM waves.

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“…[30][31][32] When electromagnetic waves are injected, mode conversion occurs. 33) The parameters for the FDTD simulation are summarized in Table II.…”

Section: Simulation Methodsmentioning

confidence: 99%

Finite-Difference Time-Domain Simulation on Transmission of Millimeter Waves through Miter Bends

Kashima¹,

Nakamura²,

Takayama³

et al. 2013

Jpn. J. Appl. Phys.

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“…9) In previous studies, we have verified the transmission efficiency of the waveguide using FDTD. 10,11) However, the waveguide wall is approximated as a perfect electric conductor (PEC) in the simulation. In other words, simulations were achieved without energy losses by the induced current on the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Finite-difference time-domain analysis of electromagnetic wave propagation in corrugated waveguide: Effect of miter bend/polarizer miter bend

Fujita

Ikuno

Kubo

et al. 2015

Jpn. J. Appl. Phys.

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The effect of the polarizer miter bend (PMB) reflector on polarization is numerically investigated by using the finite-difference time-domain (FDTD) method. The Drude model is implemented to take into account the fact that the waveguide wall is prepared from a dispersive medium. In electron cyclotron resonance heating (ECRH), the corrugated waveguide and miter bend are adopted for transmitting millimeter electromagnetic waves. In addition, PMB is employed to improve the plasma heating efficiency. The results of computations show that modes other than the input mode are also generated owing to the reflection at the miter bend mirror/PMB reflector. Moreover, it is found that elliptical polarization is observed after the linear polarization passes through PMB.

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“…The FDTD method was introduced by Yee in 1966 [3] to solve Maxwell's equation numerically. In our group, we have been developing FDTD simulation code and the visualization system to analyze the EM wave transmission [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Interactive visualization system to analyze corrugated millimeter-waveguide component of ECH in nuclear fusion with FDTD simulation

Kashima

Nakamura

Tamura

et al. 2014

J. Phys.: Conf. Ser.

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Optimization of a corrugated millimeter-wave waveguide and a miter bend by FDTD simulation

Cited by 7 publications

References 7 publications

Finite-Difference Time-Domain Simulation on Transmission of Millimeter Waves through Miter Bends

Finite-Difference Time-Domain Simulation on Transmission of Millimeter Waves through Miter Bends

Finite-difference time-domain analysis of electromagnetic wave propagation in corrugated waveguide: Effect of miter bend/polarizer miter bend

Interactive visualization system to analyze corrugated millimeter-waveguide component of ECH in nuclear fusion with FDTD simulation

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