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Integrated Antenna ...
Integrated Antenna Solutions for Wireless Sensor and Millimeter-Wave Systems
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- Cheng, Shi, 1980- (författare)
- Uppsala universitet,Mikrovågs- och terahertzteknik
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- Rydberg, Anders, Prof. (preses)
- Uppsala universitet,Mikrovågs- och terahertzteknik
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- Hallbjörner, Paul, Dr. (preses)
- Uppsala universitet,Mikrovågs- och terahertzteknik
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- Chen, Zhining, Prof. (opponent)
- Institute for Infocomm Research, Singapore
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(creator_code:org_t)
- ISBN 9789155476816
- Uppsala : Acta Universitatis Upsaliensis, 2009
- Engelska 114 s.
- Relaterad länk:
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- This thesis presents various integrated antenna solutions for different types of systems and applications, e.g. wireless sensors, broadband handsets, advanced base stations, MEMS-based reconfigurable front-ends, automotive anti-collision radars, and large area electronics. For wireless sensor applications, a T-matched dipole is proposed and integrated in an electrically small body-worn sensor node. Measurement techniques are developed to characterize the port impedance and radiation properties. Possibilities and limitations of the planar inverted cone antenna (PICA) for small handsets are studied experimentally. Printed slot-type and folded PICAs are demonstrated for UWB handheld terminals. Both monolithic and hybrid integration are applied for electrically steerable array antennas. Compact phase shifters within a traveling wave array antenna architecture, on single layer substrate, is investigated for the first time. Radio frequency MEMS switches are utilized to improve the performance of reconfigurable antennas at higher frequencies. Using monolithic integration, a 20 GHz switched beam antenna based on MEMS switches is implemented and evaluated. Compared to similar work published previously, complete experimental results are here for the first time reported. Moreover, a hybrid approach is used for a 24 GHz switched beam traveling wave array antenna. A MEMS router is fabricated on silicon substrate for switching two array antennas on a LTCC chip. A concept of nano-wire based substrate integrated waveguides (SIW) is proposed for millimeter-wave applications. Antenna prototypes based on this concept are successfully demonstrated for automotive radar applications. W-band body-worn nonlinear harmonic radar reflectors are proposed as a means to improve automotive radar functionality. Passive, semi-passive and active nonlinear reflectors consisting of array antennas and nonlinear circuitry on flex foils are investigated. A new stretchable RF electronics concept for large area electronics is demonstrated. It incorporates liquid metal into microstructured elastic channels. The prototypes exhibit high stretchability, foldability, and twistability, with maintained electrical properties.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- harmonic radar (HR)
- liquid alloy
- millimeter-wave
- micromachining
- phase shifters
- planar inverted cone antennas (PICA)
- printed circuit boards (PCB)
- quasi-Yagi antennas
- radio frequency microelectromechanical system (RF MEMS)
- stretchable antennas
- substrate integrate waveguides (SIW)
- T-matched dipole antennas
- tapered slot antennas
- traveling wave array antennas
- ultrawideband (UWB)
- wireless sensor networks.
- Electrical engineering
- Elektroteknik
- Elektronik
- Electronics
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