Search Results - "Bächtold, W."

Optical phase locked loop for transparent inter-satellite communications by Herzog, F, Kudielka, K, Erni, D, Bächtold, W

“…A novel type of optical phase locked loop (OPLL), optimized for homodyne inter-satellite communication, is presented. The loop employs a conventional 180? 3 dB…”
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Modal power loss coefficients for highly overmoded rectangular dielectric waveguides based on free space modes by Lenz, D, Erni, D, Bächtold, W

“…A simple formalism to estimate modal power loss coefficients for an overmoded rectangular waveguide with rough surfaces is presented. The method is based on…”
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Investigation of the cleaved surface of a p–i–n laser using Kelvin probe force microscopy and two-dimensional physical simulations by Robin, F., Jacobs, H., Homan, O., Stemmer, A., Bächtold, W.

“…We have investigated the cross-sectional electric field and potential distribution of a cleaved n+-InP/InGaAsP/p+-InP p–i–n laser diode using Kelvin probe…”
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Spatially resolved water content profiles from inverted time domain reflectometry signals by Oswald, B., Benedickter, H. R., Bächtold, W., Flühler, H.

“…We present a method for extracting spatially resolved water content profiles θ(x) from a two‐wire time domain reflectometry (TDR) probe. The profile θ(x) is…”
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Highly reflective AlGaAsSb/InP Bragg reflector at 1.55 μm grown by MOVPE by Ostinelli, O., Haiml, M., Grange, R., Almuneau, G., Ebnöther, M., Gini, E., Müller, E., Keller, U., Bächtold, W.

“…The metalorganic vapor-phase epitaxy growth of a highly reflective 24-pair AlGaAsSb/InP-distributed Bragg reflector (DBR) is reported for the first time. The…”
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Direct observation of depolarization shift of the intersubband resonance by Graf, S, Sigg, H, Kohler, K, Bachtold, W

“…We have studied the intersubband resonance of GaAs/AlGaAs multi-quantum-well systems by comparing photon drag and absorption spectra obtained by in-plane…”
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Varactor-loaded transmission-line phase shifter at C-band using lumped elements by Ellinger, F., Jackel, H., Bachtold, W.

“…The design of varactor-loaded transmission-line phase shifters using lumped elements is discussed in this paper. A monolithic-microwave integrated-circuit…”
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High-frequency electrical pulse generation using optical rectification in bulk GaAs by Graf, S., Sigg, H., Bächtold, W.

“…We present the realization of a traveling-wave electrical pulse generator using pure nonresonant instantaneous optical rectification in bulk GaAs. The optical…”
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Lumped-element load-network design for class-E power amplifiers by Negra, R., Bachtold, W.

“…This paper presents a design-oriented analysis of two lumped-element load-coupling topologies, which can be used to approximate class-E switching conditions…”
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A 6.5-mW receiver front-end for bluetooth in 0.18- mu m CMOS by Beffa, F, Vogt, R, Bachtold, W, Zellweger, E, Lott, U

“…This paper describes the design of a low-IF receiver front-end for Bluetooth fabricated in a 0.18 mu m CMOS technology. The chip includes an LNA and an…”
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A differential active patch antenna element for array applications by Brauner, T., Vogt, R., Bachtold, W.

“…This letter describes the implementation of an active receiving antenna at 5-6 GHz. An aperture-coupled patch antenna is designed to provide a differential…”
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Ultracompact reflective-type phase shifter MMIC at C-band with 360° phase-control range for smart antenna combining by Ellinger, F., Vogt, R., Bachtold, W.

“…The circuit has been developed for low-cost smart antenna receivers, operating in accordance to the IEEE 802.11a and the high-performance radio local area…”
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Study and Design Optimization of Multiharmonic Transmission-Line Load Networks for Class-E and Class-F K-Band MMIC Power Amplifiers by Negra, R., Ghannouchi, F.M., Bachtold, W.

“…A design-oriented analysis of microwave transmission-line class-E and class-F amplifiers is presented in this paper. Multiharmonic transmission-line load…”
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Direct observation of dynamical screening of the intersubband resonance by Graf, S., Sigg, H., Köhler, K., Bächtold, W.

“…We have studied the intersubband resonance of GaAs/AlGaAs multi-quantum well systems by comparing photon drag and absorption spectra. The peak absorption at…”
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Compact reflective-type phase-shifter MMIC for C-band using a lumped-element coupler by Ellinger, F., Vogt, R., Bachtold, W.

“…The design and results of an ultra-compact single-load reflective-type monolithic-microwave integrated-circuit phase shifter at 6.2 GHz for a satellite radar…”
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Spectroscopy of coupled one-dimensional subbands by Salis, G., Heinzel, T., Ensslin, K., Homan, O., Bächtold, W., Maranowski, K., Gossard, A.C.

“…A quantum point contact with one-dimensional subbands described by two quantum numbers has been realized by laterally confining a quasi two-dimensional…”
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4-12 GHz InP HEMT-based MMIC low-noise amplifier by Limacher, R., Auf der Maur, M., Meier, H., Megej, A., Orzati, A., Bachtod, W.

“…In this paper, we present a monolithically integrated 3-stage low-noise amplifier working in the 4-12 GHz band. The circuit was fabricated on our in-house 0.2…”
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VISTAS: a comprehensive system-oriented spatiotemporal VCSEL model by Jungo, M.X., Erni, D., Bachtold, W.

“…We propose a highly efficient spatiotemporal vertical-cavity surface-emitting laser (VCSEL) model aimed at optimizing entire optical links. It is based on…”
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Optical Phase Locking by Local Oscillator Phase Dithering by Herzog, F., Kudielka, K., Erni, D., Bachtold, W.

“…A new type of optical phase-locked loop (OPLL), called the dither loop, is mathematically analyzed. The dither loop extracts a phase-error signal by applying a…”
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Carrier lifetime reduction in 1.5 μ m AlGaAsSb saturable absorbers with air and AlAsSb barriers by Ostinelli, O., Bächtold, W., Haiml, H., Grange, R., Keller, U., Gini, E., Almuneau, G.

“…The optical properties of different AlGaAsSb semiconductor saturable absorber mirrors and In P ∕ Al Ga As Sb heterostructures have been investigated by…”
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