Fundamental Principles of Microwave Electron Devices

Ishii, T. Koryu

doi:10.1016/b978-0-12-374700-6.50021-0

Cited by 6 publications

(13 citation statements)

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“…In these tubes, where microwave beams are generated by electrons moving inside a slow-wave structure 122 , the wave frequency is proportional to the electron velocity, Figure 13 shows an example of the measured density profiles in JET, which appears to be in good agreement with the profiles obtained from…”

Section: Instrumentation and Techniquessupporting

confidence: 72%

Microwave reflectometry for magnetically confined plasmas

Mazzucato

1998

Review of Scientific Instruments

185

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This paper is about microwave reflectometry -a radar technique for plasma density measurements using the reflection of electromagnetic waves by a plasma cutoff. Both the theoretical foundations of reflectometry and its practical application to the study of magnetically confined plasmas are reviewed in this paper. In particular, the role of short-scale density fluctuations is discussed at length, both as a unique diagnostic tool for turbulence studies in thermonuclear plasmas, and for the deleterious effects that fluctuations may have on the measurement of the average plasma density with microwave reflectometry.

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Section: Instrumentation and Techniquessupporting

confidence: 72%

Microwave reflectometry for magnetically confined plasmas

Mazzucato

1998

Review of Scientific Instruments

185

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“…5 Another property of the phonon-polariton, significantly reduced group velocity, can be utilized in solid-state traveling wave devices. 6 Moreover, the photonic band gap (PBG), in which the propagation of electromagnetic (EM) waves is forbidden, will be affected by the presence of the phonon-polariton in photonic crystals composed of polar materials. [7][8][9] It is shown that the phononpolariton coupling flattens the photonic bands and is favorable for opening up the PBG.…”

Section: Phonon-polaritons In Quasiperiodic Piezoelectric Superlatticesmentioning

confidence: 99%

Phonon-polaritons in quasiperiodic piezoelectric superlattices

Zhang

Zhu

et al. 2004

Applied Physics Letters

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“…The amplifier configuration is shown in Figure 4.5(a). The equivalent circuit of the FET is readily available in the literature and a 4 th -order one [52] is duplicated in Compared with the equivalent current-source method (ECSM) [13]- [15] and ADS. …”

Section: Active Devicesmentioning

confidence: 99%

“…The circuit configuration is shown in Figure 4.10. Equivalent circuit of the amplifier is readily available in the literature [52] and is duplicated in with the equivalent current-source method (ECSM) [13]- [15] and ADS. Results of magnitude and phase of the entire amplifier circuit are shown in Figure 4.11 and Figure 4.12, respectively, from 100 MHz to 10 GHz.…”

Section: Influence On Radiation With Mounted Active Devicesmentioning

confidence: 99%

An Efficient Scheme for Processing Arbitrary Lumped Multiport Devices in the Finite-Difference Time-Domain Method

Wang

Kuo

2007

IEEE Trans. Microwave Theory Techn.

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Developing full-wave simulators for high-frequency circuit simulation is a topic many researchers have investigated. Generally speaking, methods invoking analytic pre-processing of the device's V-I relations (admittance or impedance) are computationally more efficient than methods employing numerical procedure to iteratively process the device at each time step. For circuits providing complex functionality, two-port or possibly multi-port devices whether passive or active, are sure to appear in the circuits. Therefore, extensions to currently available full-wave methods for handling one-port devices to process multi-port devices would be useful for hybrid microwave circuit designs. In this dissertation, an efficient scheme for processing arbitrary multi-port devices in the finite-difference time-domain (FDTD) method is proposed. The device's admittance is analytically pre-processed and fitted into one grid cell. With an improved time-stepping expression, the computation efficiency is further increased.Multi-port devices in the circuit can be systematically incorporated and analyzed in a full-wave manner. The accuracy of the proposed method is verified by comparison with results from the equivalent current-source method and is numerically stable.iii

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Fundamental Principles of Microwave Electron Devices

Cited by 6 publications

References 0 publications

Microwave reflectometry for magnetically confined plasmas

Microwave reflectometry for magnetically confined plasmas

Phonon-polaritons in quasiperiodic piezoelectric superlattices

An Efficient Scheme for Processing Arbitrary Lumped Multiport Devices in the Finite-Difference Time-Domain Method

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