Miniaturization of 2 × 4 90-Degree Hybrid Optical Couplers

Autor: Alessio Miranda, Weiming Yao, Jos J. G. M. van der Tol, Kevin A. Williams

Publikováno v: IEEE Journal of Quantum Electronics, 59(3):0600909. Institute of Electrical and Electronics Engineers

In this work we study the limits of miniaturization of a 90-degree hybrid coupler working in the L, C and S bands, with respect to a number of performance parameters aimed at its application for balanced detection. We investigate the main effects res

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b27f4c30fa34f0ad2f47983028fc94c
https://doi.org/10.1109/jqe.2022.3227306

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On the Optimal Operation Frequency to Minimize Phase Noise in Integrated Harmonic Oscillators

Autor: Fabio Padovan, Roberto Nonis, Andrea Bevilacqua, Alessandro Franceschin

Publikováno v: IEEE Transactions on Circuits and Systems II: Express Briefs. 65:657-661

This brief aims at finding the most appropriate frequency of operation of an integrated harmonic oscillator in order to maximize its spectral purity. To achieve this, a simple, yet accurate, scalable model is developed for the LC tank, that tracks th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e49cef40bd7dba6c9bd245312db4d879
https://doi.org/10.1109/tcsii.2018.2822483

On-line estimation of local oscillator noise and optimisation of servo parameters in atomic clocks

Autor: Nils Scharnhorst, Johannes Kramer, Mariia Stepanova, Ian D. Leroux, Piet O. Schmidt, Lennart Pelzer, Stephan Hannig

Publikováno v: Metrologia 54 (2017), Nr. 3

For atomic frequency standards in which fluctuations of the local oscillator (LO) frequency are the dominant noise source, we examine the role of the servo algorithm that predicts and corrects these frequency fluctuations. We derive the optimal linea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b2d39d341e1b198df2157be2d6cefb7
https://doi.org/10.1088/1681-7575/aa66e9

An X-band Schottky diode mixer in SiGe technology with tunable Marchand balun

Autor: Rasmus S. Michaelsen, Kjeld M. Tamborg, Tom K. Johansen, Lei Yan, Vitaliy Zhurbenko

Publikováno v: Michaelsen, R S, Johansen, T K, Tamborg, K M, Zhurbenko, V & Yan, L 2017, ' An X-band Schottky diode mixer in SiGe technology with tunable Marchand balun ', International Journal of Microwave and Wireless Technologies, vol. 9, no. 5, pp. 965-976 . https://doi.org/10.1017/S1759078716001069

In this paper, we propose a double balanced mixer with a tunable Marchand balun. The circuit is designed in a SiGe BiCMOS process using Schottky diodes. The tunability of the Marchand balun is used to enhance critical parameters for double balanced m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::069e6dd5ea287c5cc88732ece710e447
https://doi.org/10.1017/s1759078716001069