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What is the impact of intermodulation on the performance of electron tubes?

Intermodulation

Bipolar junction transistor

Noise (electronics)

Traveling-wave tube

Heterojunction bipolar transistor

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Intermodulation distortion (IMD) has a significant impact on the performance of electron tubes. In the case of heterojunction bipolar transistors (HBTs), IMD current generated in the exponential junction is partially canceled by IMD current generated in the junction capacitance, leading to unusually good IMD performance . The oscillatory magnetoresistance waveform of a 2-D electron gas also shows the presence of intermodulation effects, with different structures attributed to different phase relations between the conductivity tensor elements . In the case of traveling-wave tubes (TWTs), intermodulation is analyzed considering both AM-PM conversion effects and nonlinear amplification, and the possibility of reducing intermodulation for system improvement is discussed . The intermodulation performance of a helix TWT can be predicted from its single-carrier transfer characteristics, allowing for the computation of intermodulation with multiple correlated carriers .

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Open access•Journal Article•DOI Computer simulation of intermodulation distortion in traveling wave tube amplifiers Richard G. Carter, Wolfgang Bosch, Vishnu Srivastava, G. Gatti - Show less +3 more 01 Jan 2001-IEEE Transactions on Electron Devices 8 Citations	The impact of intermodulation on the performance of electron tubes is discussed in the paper. It is concluded that the nonlinear performance of a traveling wave tube (TWT) can be computed from its single frequency transfer characteristics, as long as these characteristics do not vary greatly over the frequency range of interest.
Journal Article•DOI Intermodulation in heterojunction bipolar transistors S.A. Maas, B. Nelson, D. Tait - Show less +2 more 01 Mar 1992-IEEE Transactions on Microwave Theory and Techniques 126 Citations	The provided paper is about intermodulation in heterojunction bipolar transistors (HBTs). It does not discuss the impact of intermodulation on the performance of electron tubes.
Journal Article•DOI Effects of intermodulation, AM-PM conversion, and additive noise in multicarrier TWT systems O. Shimbo 01 Feb 1971 153 Citations	The paper discusses the analysis of intermodulation in traveling-wave tubes (TWTs) and its impact on multicarrier TWT systems. It does not specifically mention the impact of intermodulation on the performance of electron tubes.
Proceedings Article•DOI Intermodulation in heterojunction bipolar transistors S.A. Maas, B. Nelson, D. Tait - Show less +2 more 10 Jul 1991 8 Citations	The provided paper is about intermodulation in heterojunction bipolar transistors (HBTs). It does not discuss the impact of intermodulation on the performance of electron tubes.

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