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Cheng, Shi
Publications (10 of 47) Show all publications
Tripodi, L., Hu, X., Goetzen, R., Matters-Kammerer, M. K., van Goor, D., Cheng, S. & Rydberg, A. (2012). Broadband CMOS Millimeter-Wave Frequency Multiplier With Vivaldi Antenna in 3-D Chip-Scale Packaging. IEEE transactions on microwave theory and techniques, 60(12), 3761-3768
Open this publication in new window or tab >>Broadband CMOS Millimeter-Wave Frequency Multiplier With Vivaldi Antenna in 3-D Chip-Scale Packaging
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2012 (English)In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 60, no 12, p. 3761-3768Article in journal (Refereed) Published
Abstract [en]

This paper describes a frequency multiplier able to emit a broadband signal with a frequency range from 70 GHz up to at least 170 GHz. The device is composed of a nonlinear transmission line (NLTL) implemented in commercial CMOS 65-nm technology and an off-chip Vivaldi antenna. These two elements are packaged together with a 3-D chip-scale packaging technology. Characterization of the whole device and of the standalone NLTL is presented at frequencies up to 170 GHz.

Keywords
Chip-scale packaging, nonlinear transmission line (NLTL), 65-nm CMOS, Vivaldi antenna
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Electronics
Identifiers
urn:nbn:se:uu:diva-193031 (URN)10.1109/TMTT.2012.2220564 (DOI)000312896200014 ()
Available from: 2013-02-04 Created: 2013-01-28 Last updated: 2017-12-06Bibliographically approved
Cheng, S. & Wu, Z. (2012). Microfluidic electronics. Lab on a Chip, 12(16), 2782-2791
Open this publication in new window or tab >>Microfluidic electronics
2012 (English)In: Lab on a Chip, ISSN 1473-0197, E-ISSN 1473-0189, Vol. 12, no 16, p. 2782-2791Article in journal (Refereed) Published
Abstract [en]

Microfluidics, a field that has been well-established for several decades, has seen extensive applications in the areas of biology, chemistry, and medicine. However, it might be very hard to imagine how such soft microfluidic devices would be used in other areas, such as electronics, in which stiff, solid metals, insulators, and semiconductors have previously dominated. Very recently, things have radically changed. Taking advantage of native properties of microfluidics, advances in microfluidics-based electronics have shown great potential in numerous new appealing applications, e. g. bio-inspired devices, body-worn healthcare and medical sensing systems, and ergonomic units, in which conventional rigid, bulky electronics are facing insurmountable obstacles to fulfil the demand on comfortable user experience. Not only would the birth of microfluidic electronics contribute to both the microfluidics and electronics fields, but it may also shape the future of our daily life. Nevertheless, microfluidic electronics are still at a very early stage, and significant efforts in research and development are needed to advance this emerging field. The intention of this article is to review recent research outcomes in the field of microfluidic electronics, and address current technical challenges and issues. The outlook of future development in microfluidic electronic devices and systems, as well as new fabrication techniques, is also discussed. Moreover, the authors would like to inspire both the microfluidics and electronics communities to further exploit this newly-established field.

National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-179617 (URN)10.1039/c2lc21176a (DOI)000306523800003 ()
Available from: 2012-08-20 Created: 2012-08-20 Last updated: 2017-12-07Bibliographically approved
Hu, X., Tripodi, L., Matters-Kammerer, M. K., Cheng, S. & Rydberg, A. (2011). 65-nm CMOS Monolithically Integrated Subterahertz Transmitter. IEEE Electron Device Letters, 32(9), 1182-1184
Open this publication in new window or tab >>65-nm CMOS Monolithically Integrated Subterahertz Transmitter
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2011 (English)In: IEEE Electron Device Letters, ISSN 0741-3106, E-ISSN 1558-0563, Vol. 32, no 9, p. 1182-1184Article in journal (Refereed) Published
Abstract [en]

This letter presents a transmitter for subterahertz radiation (up to 160 GHz), which consists of a nonlinear transmission line (NLTL) and an extremely wideband (EWB) slot antenna on a silicon substrate of low resistivity (10 Omega . cm). The fabrication was realized using a commercially available 65-nm CMOS process. On-wafer characterization of the whole transmitter, of the stand-alone EWB antenna, and of the stand-alone NLTL is presented. Reflection measurements show that the stand-alone EWB antenna has a -10-dB impedance bandwidth in the frequency bands of 75-100 GHz and 220-325 GHz, which agrees very well with the simulation results. The simulated radiation patterns of the antenna are also presented, indicating that the transmitter has an ominidirectional performance. The output power of the NLTL alone and of the transmitter is measured up to 160 GHz, from which the power gain of the on-chip antenna is derived and has a maximum value of -9.5 dBi between 90 and 120 GHz.

Keywords
extremely wideband (EWB) antenna, nonlinear transmission line (NLTL), 65-nm CMOS
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Electronics
Identifiers
urn:nbn:se:uu:diva-158877 (URN)10.1109/LED.2011.2159771 (DOI)000294171600006 ()
Available from: 2011-09-20 Created: 2011-09-19 Last updated: 2017-12-08Bibliographically approved
Cheng, S. & Wu, Z. (2011). A Microfluidic, Reversibly Stretchable, Large-Area Wireless Strain Sensor. Advanced Functional Materials, 21(12), 2282-2290
Open this publication in new window or tab >>A Microfluidic, Reversibly Stretchable, Large-Area Wireless Strain Sensor
2011 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 21, no 12, p. 2282-2290Article in journal (Refereed) Published
Abstract [en]

This article describes the implementation and characterization of a new self-contained large-area wireless strain sensor, operating around 1.5 GHz, based on the concept of multi-layer microfluidic stretchable radiofrequency electronics (mu FSRFEs). Compared to existing solutions, the presented integrated strain sensor is capable of remotely detecting repeated high tensile dynamic strains of up to 15% over very large surfaces or movable parts, and gets rid of all hardwiring to external storage or data processing equipment. Unlike conventional electronic devices, the major part of the sensor is a mechanically reconfigurable and reversibly deformable patch antenna, which consists of two layers of liquid metal alloy filled microfluidic channels in a silicone elastomer. A simplified radiofrequency (RF) transmitter composed of miniaturized rigid active integrated circuits (ICs) associated with discrete passive components was assembled on a flexible printed circuit board (FPCB) and then heterogeneously integrated to the antenna. The elastic patch antenna can withstand repeated mechanical stretches while still maintaining its electrical function to some extent, and return to its original state after removal of the stress. Additionally, its electrical characteristics at frequency of operation are highly sensitive to mechanical strains. Consequently, not only is this antenna a radiator for transmitting and receiving RF signals like any other conventional antennas, but also acts as a reversible large-area strain sensor in the integrated device. Good electrical performance of the standalone antenna and the RF transmitter sub-module was respectively verified by experiments. Furthermore, a personal computer (PC)-assisted RF receiver for receiving and processing the measured data was also designed, implemented, and evaluated. In the real-life demonstration, the integrated strain sensor successfully monitored periodically repeated human body motion, and wirelessly transmitted the measured data to the custom-designed receiver at a distance of 5m in real-time.

National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-156015 (URN)10.1002/adfm.201002508 (DOI)000291723300013 ()
Available from: 2011-07-05 Created: 2011-07-05 Last updated: 2017-12-11Bibliographically approved
Cheng, S. & Wu, Z. (2011). Microfluidic Reversibly Stretchable Large-Area Wireless Strain Sensor. Advanced Functional Materials, 21(12), 2282-2290
Open this publication in new window or tab >>Microfluidic Reversibly Stretchable Large-Area Wireless Strain Sensor
2011 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 21, no 12, p. 2282-2290Article in journal (Refereed) Published
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-183271 (URN)10.1002/adfm.201002508 (DOI)
Available from: 2012-10-23 Created: 2012-10-23 Last updated: 2017-12-07Bibliographically approved
Pettersson, L., Cheng, S., Salter, M., Rydberg, A. & Platt, D. (2010). Compact Integrated Slot Array Antennas for the 79 GHz Automotive Band. International Journal of Microwave and Wireless Technologies, 2(3-4), 305-316
Open this publication in new window or tab >>Compact Integrated Slot Array Antennas for the 79 GHz Automotive Band
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2010 (English)In: International Journal of Microwave and Wireless Technologies, Vol. 2, no 3-4, p. 305-316Article in journal (Refereed) Published
Abstract [en]

This paper presents two compact slot array antennas for the 79 GHz automotive band integrated into a 28 um thick benzocyclobutene (BCB) substrate attached to a 325 um thick 5 20 Omega cm bulk resistivity silicon wafer. The two antennas are a transmit (TX) 1x8 slot array antenna with a size of 1x23 mm and a receive (RX) M slot array antenna with a size of 15x23 mm. Promising performance has been measured with the TX and RX sub-array antennas (gain >4 dBi) with good matching to 50 11 (RL>10 dB) in the frequency range 70-90 GHz. By using a metal cavity, mounted on the back of the antenna, parallel plate modes could be reduced and the gain could also be increased by 2dB. The measured and the simulated results are consistent.

National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Electronics
Identifiers
urn:nbn:se:uu:diva-138810 (URN)10.1017/S1759078710000486 (DOI)000208629100009 ()
Note

Special Issue

Available from: 2010-12-20 Created: 2010-12-20 Last updated: 2015-08-14Bibliographically approved
Cheng, S. & Wu, Z. (2010). Microfluidic stretchable RF electronics. Lab on a Chip, 10(23), 3227-3234
Open this publication in new window or tab >>Microfluidic stretchable RF electronics
2010 (English)In: Lab on a Chip, ISSN 1473-0197, E-ISSN 1473-0189, Vol. 10, no 23, p. 3227-3234Article in journal (Refereed) Published
Abstract [en]

Stretchable electronics is a revolutionary technology that will potentially create a world of radically different electronic devices and systems that open up an entirely new spectrum of possibilities. This article proposes a microfluidic based solution for stretchable radio frequency (RF) electronics, using hybrid integration of active circuits assembled on flex foils and liquid alloy passive structures embedded in elastic substrates, e. g. polydimethylsiloxane (PDMS). This concept was employed to implement a 900 MHz stretchable RF radiation sensor, consisting of a large area elastic antenna and a cluster of conventional rigid components for RF power detection. The integrated radiation sensor except the power supply was fully embedded in a thin elastomeric substrate. Good electrical performance of the standalone stretchable antenna as well as the RF power detection sub-module was verified by experiments. The sensor successfully detected the RF radiation over 5 m distance in the system demonstration. Experiments on two-dimensional (2D) stretching up to 15%, folding and twisting of the demonstrated sensor were also carried out. Despite the integrated device was severely deformed, no failure in RF radiation sensing was observed in the tests. This technique illuminates a promising route of realizing stretchable and foldable large area integrated RF electronics that are of great interest to a variety of applications like wearable computing, health monitoring, medical diagnostics, and curvilinear electronics.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-135333 (URN)10.1039/c005159d (DOI)000284068200007 ()
Available from: 2010-12-08 Created: 2010-12-06 Last updated: 2017-12-11Bibliographically approved
Brenner, R. & Cheng, S. (2010). Multigigabit wireless transfer of trigger data through millimetre wave technology. Journal of Instrumentation, 5, C07002
Open this publication in new window or tab >>Multigigabit wireless transfer of trigger data through millimetre wave technology
2010 (English)In: Journal of Instrumentation, ISSN 1748-0221, Vol. 5, p. C07002-Article in journal (Refereed) Published
Abstract [en]

The amount of data that can be transferred from highly granular tracking detectors with several million channels is today limited by the available bandwidth in the readout links which again is limited by power budget, mass and the available space for services. The low bandwidth prevents the tracker from being fully read out in real time which is a requirement for becomming a part of the first level trigger. To get the tracker to contribute to the fast trigger decision the data transfer bandwidth from the tracker has either to be increased for all data to be read out in real time or the quantity of the data to be reduced by improving the quality of the data or a combination of the two. A higher data transfer rate can be achieved by increasing the the number of data links, the data transfer speed or a combination of both. The quantity of data read out from the detector can be reduced by introducing on-detector intelligence. Next generation multigigabit wireless technology has several features that makes the technology attractive for use in future trackers. The technology can provide both higher bandwidth for data readout and means to build on-detector intelligence to improve the quality of data. The emerging millimetre wave technology offers components that are small size, low power and mass thus well suited for integration in trackers. In this paper the feasibility of wireless transfer of trigger data using 60GHz radio in the future upgraded tracker at the Super Large Hadron Collider (SLHC) is investigated.

Keywords
Particle tracking detectors, Trigger concepts and systems (hardware and software), Data acquisition concepts
National Category
Physical Sciences Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-134111 (URN)10.1088/1748-0221/5/07/C07002 (DOI)000283793800020 ()
Available from: 2010-12-03 Created: 2010-11-22 Last updated: 2016-04-18Bibliographically approved
Malmqvist, R., Samuelsson, C., Cheng, S., Rantakari, P., Vähä-Heikkilä, T., Rydberg, A. & Varis, J. (2010). RF MEMS matching networks for frequency tunable SiGe LNA. In: : . Paper presented at Conference GigaHertz2010, Lund, Sweden, 9/3 - 10/3, 2010.
Open this publication in new window or tab >>RF MEMS matching networks for frequency tunable SiGe LNA
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2010 (English)Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-138828 (URN)
Conference
Conference GigaHertz2010, Lund, Sweden, 9/3 - 10/3, 2010
Available from: 2010-12-20 Created: 2010-12-20 Last updated: 2016-04-18Bibliographically approved
van Engen, P., van Doremalen, R., Jochems, W., Rommers, A., Cheng, S., Rydberg, A., . . . Muller, P. (2009). 3D Si-level integration in wireless sensor node. In: Smart System Integration Conference 2009: . Paper presented at Smart System Integration Conference 2009.
Open this publication in new window or tab >>3D Si-level integration in wireless sensor node
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2009 (English)In: Smart System Integration Conference 2009, 2009Conference paper, Published paper (Refereed)
National Category
Signal Processing
Research subject
Engineering Science with specialization in Microwave Technology
Identifiers
urn:nbn:se:uu:diva-111482 (URN)
Conference
Smart System Integration Conference 2009
Projects
WISENET
Available from: 2009-12-15 Created: 2009-12-15 Last updated: 2016-04-14Bibliographically approved
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