The Experts below are selected from a list of 3075 Experts worldwide ranked by ideXlab platform
Martin Margala - One of the best experts on this subject based on the ideXlab platform.
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a terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
International Conference on Electron Devices and Solid-State Circuits, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1–1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=−4.5dB, S31< −20dB, S11<-20dB at 1.022THz. We obtain an excellent isolation between split ports for Signal transmission, and a very good Signal cancellation on port3. The coupler and PPDWS Line are planned for use in the Terahertz Ballistic Deflection Transistor Travelling Wave Amplifier; however, the design is also capable of being applied to other very high frequency applications.
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a design of terahertz parallel plate dielectric waveguide with Signal Line inserted for ballistic deflection transistor travelling wave amplifier
Journal of Physics: Conference Series, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Poorna Marthi, Nazir Hossain, J F Milithaler, Martin MargalaAbstract:In this paper a new waveguide design is proposed to be implemented as part of Ballistic Deflection Transistor (BDT) Traveling Wave Amplifier Design. The BDT is designed to be operated in the Terahertz regime. Due to its relatively low transconductance (gm=200µA/V), the entire structure will consist of ten stages, with 15 BDTs/stage, to reach a total gain of 30mA/V. In this case, the total length of the transmission Line will be more than 400µm. We did the investigation for different structures and materials of the transmission Line. For our Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) design, we are able to get an average loss of 0.46dB/mm at 0.8-1.4THz from ANSYS HFSS simulation. The return loss for input and output are better than -20dB at 0.8-1.7THz. Although it is designed for our future travelling wave amplifier, it can also be used for various other THz frequency applications.
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A terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC), 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1-1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=-4.5dB, S31
Huan Wang - One of the best experts on this subject based on the ideXlab platform.
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a terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
International Conference on Electron Devices and Solid-State Circuits, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1–1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=−4.5dB, S31< −20dB, S11<-20dB at 1.022THz. We obtain an excellent isolation between split ports for Signal transmission, and a very good Signal cancellation on port3. The coupler and PPDWS Line are planned for use in the Terahertz Ballistic Deflection Transistor Travelling Wave Amplifier; however, the design is also capable of being applied to other very high frequency applications.
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a design of terahertz parallel plate dielectric waveguide with Signal Line inserted for ballistic deflection transistor travelling wave amplifier
Journal of Physics: Conference Series, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Poorna Marthi, Nazir Hossain, J F Milithaler, Martin MargalaAbstract:In this paper a new waveguide design is proposed to be implemented as part of Ballistic Deflection Transistor (BDT) Traveling Wave Amplifier Design. The BDT is designed to be operated in the Terahertz regime. Due to its relatively low transconductance (gm=200µA/V), the entire structure will consist of ten stages, with 15 BDTs/stage, to reach a total gain of 30mA/V. In this case, the total length of the transmission Line will be more than 400µm. We did the investigation for different structures and materials of the transmission Line. For our Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) design, we are able to get an average loss of 0.46dB/mm at 0.8-1.4THz from ANSYS HFSS simulation. The return loss for input and output are better than -20dB at 0.8-1.7THz. Although it is designed for our future travelling wave amplifier, it can also be used for various other THz frequency applications.
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A terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC), 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1-1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=-4.5dB, S31
Ronald W. Knepper - One of the best experts on this subject based on the ideXlab platform.
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a terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
International Conference on Electron Devices and Solid-State Circuits, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1–1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=−4.5dB, S31< −20dB, S11<-20dB at 1.022THz. We obtain an excellent isolation between split ports for Signal transmission, and a very good Signal cancellation on port3. The coupler and PPDWS Line are planned for use in the Terahertz Ballistic Deflection Transistor Travelling Wave Amplifier; however, the design is also capable of being applied to other very high frequency applications.
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a design of terahertz parallel plate dielectric waveguide with Signal Line inserted for ballistic deflection transistor travelling wave amplifier
Journal of Physics: Conference Series, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Poorna Marthi, Nazir Hossain, J F Milithaler, Martin MargalaAbstract:In this paper a new waveguide design is proposed to be implemented as part of Ballistic Deflection Transistor (BDT) Traveling Wave Amplifier Design. The BDT is designed to be operated in the Terahertz regime. Due to its relatively low transconductance (gm=200µA/V), the entire structure will consist of ten stages, with 15 BDTs/stage, to reach a total gain of 30mA/V. In this case, the total length of the transmission Line will be more than 400µm. We did the investigation for different structures and materials of the transmission Line. For our Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) design, we are able to get an average loss of 0.46dB/mm at 0.8-1.4THz from ANSYS HFSS simulation. The return loss for input and output are better than -20dB at 0.8-1.7THz. Although it is designed for our future travelling wave amplifier, it can also be used for various other THz frequency applications.
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A terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC), 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1-1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=-4.5dB, S31
Poorna Marthi - One of the best experts on this subject based on the ideXlab platform.
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a terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
International Conference on Electron Devices and Solid-State Circuits, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1–1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=−4.5dB, S31< −20dB, S11<-20dB at 1.022THz. We obtain an excellent isolation between split ports for Signal transmission, and a very good Signal cancellation on port3. The coupler and PPDWS Line are planned for use in the Terahertz Ballistic Deflection Transistor Travelling Wave Amplifier; however, the design is also capable of being applied to other very high frequency applications.
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a design of terahertz parallel plate dielectric waveguide with Signal Line inserted for ballistic deflection transistor travelling wave amplifier
Journal of Physics: Conference Series, 2017Co-Authors: Huan Wang, Ronald W. Knepper, Poorna Marthi, Nazir Hossain, J F Milithaler, Martin MargalaAbstract:In this paper a new waveguide design is proposed to be implemented as part of Ballistic Deflection Transistor (BDT) Traveling Wave Amplifier Design. The BDT is designed to be operated in the Terahertz regime. Due to its relatively low transconductance (gm=200µA/V), the entire structure will consist of ten stages, with 15 BDTs/stage, to reach a total gain of 30mA/V. In this case, the total length of the transmission Line will be more than 400µm. We did the investigation for different structures and materials of the transmission Line. For our Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) design, we are able to get an average loss of 0.46dB/mm at 0.8-1.4THz from ANSYS HFSS simulation. The return loss for input and output are better than -20dB at 0.8-1.7THz. Although it is designed for our future travelling wave amplifier, it can also be used for various other THz frequency applications.
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A terahertz ring hybrid coupler based on parallel plate dielectric waveguide with Signal Line for a ballistic deflection transistor travelling wave amplifier
2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC), 2017Co-Authors: Huan Wang, Ronald W. Knepper, Jean-françois Millithaler, Poorna Marthi, Martin MargalaAbstract:In this paper, a new design of Terahertz (THz) Ring Hybrid Coupler Based on Parallel Plate Dielectric Waveguide with Signal Line inserted (PPDWS) is proposed. The PPDWS is a simple transmission Line, easy to fabricate, with a low average loss of 0.45dB/mm at 1-1.4THz, and designed to be implemented into the THz Ring Hybrid Coupler Design. We employ (3N+1.5)λ for the circumference of the Ring Hybrid Coupler for a fundamental mode of TE10. ANSYS HFSS simulations show S21=S41=-4.5dB, S31
Kevin J. Chen - One of the best experts on this subject based on the ideXlab platform.
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High-performance CMOS-cornpatible micromachined edge-suspended coplanar waveguides on low resistivity silicon substrate
2020Co-Authors: L.l.w. Leung, Jinwen Zhang, Kevin J. ChenAbstract:This paper reports a novel low-loss CMOScompatible coplanar waveguide (CPW) structure based on the micromachined edge-suspension of the Signal Line. It is revealed that, at radio or microwave frequencies, the current is highly concentrated along the edges of the Signal Line. Since the coupling to the low resistivity silicon substrate is dominated by the current carrying part, the substrate coupling and loss can be effectively suppressed by removing the silicon along and underneath the edges of the Signal Lines. The edge-suspended structure has been implemented by a combination of deep reactive ion etching and anisotropic wet etching. The suspended structure shows much reduced loss (0.5 dB/mm at 39 GHz) and strong mechanical strength that is provided by the silicon underneath the center of the Signal Line.
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Characterization and attenuation mechanism of CMOS-compatible micromachined edge-suspended coplanar waveguides on low-resistivity silicon substrate
IEEE Transactions on Advanced Packaging, 2006Co-Authors: L.l.w. Leung, Jinwen Zhang, Kevin J. ChenAbstract:This paper presents detailed characterization of a category of edge-suspended coplanar waveguides that were fabricated on low-resistivity silicon substrates using improved CMOS-compatible micromachining techniques. The edge-suspended structure is proposed to provide reduced substrate loss and strong mechanical support at the same time. It is revealed that, at radio or microwave frequencies, the electromagnetic waves are highly concentrated along the edges of the Signal Line. Removing the silicon underneath the edges of the Signal Line, along with the silicon between the Signal and ground Lines, can effectively reduce the substrate coupling and loss. The edge-suspended structure has been implemented by a combination of deep reactive ion etching and anisotropic wet etching. Compared to the conventional silicon-based coplanar waveguides, which show an insertion loss of 2.5dB/mm, the loss of edge-suspended coplanar waveguides with the same dimensions is reduced to as low as 0.5 dB/mm and a much reduced attenuation per wavelength (dB/lambdag) at 39 GHz. Most importantly, the edge-suspended coplanar waveguides feature strong mechanical support provided by the silicon remaining underneath the center of the Signal Line. The performance of the coplanar waveguides is evaluated by high-frequency measurement and full-wave electromagnetic (EM) simulation. In addition, the resistance, inductance, conductance, capacitance (RLGC) Line parameters and the propagation constant of the coplanar waveguides (CPWs) were extracted and analyzed