Strong Nonlinear Effects of a Transmission Line Stub on Resonant Tunneling Diode Oscillators

Umer Farooq; Masayuki Mori; Koichi Maezawa

doi:10.1587/transele.2024ECS6002

Strong Nonlinear Effects of a Transmission Line Stub on Resonant Tunneling Diode Oscillators

Umer Farooq, Masayuki Mori, Koichi Maezawa^*

^*Corresponding author for this work

Electric and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

This study discusses the behavior of resonant tunneling diode (RTD) oscillators when a transmission line (TL) stub is added. The TL stub acts as a delayed feedback unit, resulting in unstable and complex oscillation behavior. Circuit simulation showed that the circuits generate various waveforms, including chaos, by changing the stub length. Experi- mental demonstration of the simulation results was performed using circuits fabricated with hybrid integration techniques using an InGaAs/AlAs RTD. These complex signals have potential for various applications in the THz frequency range. On the other hand, this finding is significant for the de- sign of THz oscillators using an RTD, since even a small metal pattern can cause such a feedback effect in the THz frequency range. In particular, interconnect wiring patterns can cause this effect because reflection due to impedance mismatch is unavoidable.

Original language	English
Pages (from-to)	58-62
Number of pages	5
Journal	IEICE Transactions on Electronics
Volume	E108.C
Issue number	1
DOIs	https://doi.org/10.1587/transele.2024ECS6002
State	Published - 2025/01/01

Keywords

chaos
microwave frequency
resonant tunneling diode
trans- mission line

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1587/transele.2024ECS6002

Cite this

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title = "Strong Nonlinear Effects of a Transmission Line Stub on Resonant Tunneling Diode Oscillators",

abstract = "This study discusses the behavior of resonant tunneling diode (RTD) oscillators when a transmission line (TL) stub is added. The TL stub acts as a delayed feedback unit, resulting in unstable and complex oscillation behavior. Circuit simulation showed that the circuits generate various waveforms, including chaos, by changing the stub length. Experi- mental demonstration of the simulation results was performed using circuits fabricated with hybrid integration techniques using an InGaAs/AlAs RTD. These complex signals have potential for various applications in the THz frequency range. On the other hand, this finding is significant for the de- sign of THz oscillators using an RTD, since even a small metal pattern can cause such a feedback effect in the THz frequency range. In particular, interconnect wiring patterns can cause this effect because reflection due to impedance mismatch is unavoidable.",

keywords = "chaos, microwave frequency, resonant tunneling diode, trans- mission line",

author = "Umer Farooq and Masayuki Mori and Koichi Maezawa",

note = "Publisher Copyright: {\textcopyright} 2025 The Institute of Electronics, Information and Communication Engineers.",

year = "2025",

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doi = "10.1587/transele.2024ECS6002",

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Y1 - 2025/1/1

N2 - This study discusses the behavior of resonant tunneling diode (RTD) oscillators when a transmission line (TL) stub is added. The TL stub acts as a delayed feedback unit, resulting in unstable and complex oscillation behavior. Circuit simulation showed that the circuits generate various waveforms, including chaos, by changing the stub length. Experi- mental demonstration of the simulation results was performed using circuits fabricated with hybrid integration techniques using an InGaAs/AlAs RTD. These complex signals have potential for various applications in the THz frequency range. On the other hand, this finding is significant for the de- sign of THz oscillators using an RTD, since even a small metal pattern can cause such a feedback effect in the THz frequency range. In particular, interconnect wiring patterns can cause this effect because reflection due to impedance mismatch is unavoidable.

AB - This study discusses the behavior of resonant tunneling diode (RTD) oscillators when a transmission line (TL) stub is added. The TL stub acts as a delayed feedback unit, resulting in unstable and complex oscillation behavior. Circuit simulation showed that the circuits generate various waveforms, including chaos, by changing the stub length. Experi- mental demonstration of the simulation results was performed using circuits fabricated with hybrid integration techniques using an InGaAs/AlAs RTD. These complex signals have potential for various applications in the THz frequency range. On the other hand, this finding is significant for the de- sign of THz oscillators using an RTD, since even a small metal pattern can cause such a feedback effect in the THz frequency range. In particular, interconnect wiring patterns can cause this effect because reflection due to impedance mismatch is unavoidable.

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Strong Nonlinear Effects of a Transmission Line Stub on Resonant Tunneling Diode Oscillators

Abstract

Keywords

ASJC Scopus subject areas

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