A Compact Broadband MEMS-Integrated Diversity System

A multidisciplinary-research effort encompassing compact broadband antenna design, indoor channel characterization, and an RF microelectromechanical-system (RF MEMS) technology with its application to a diversity system for indoor wireless communications is presented in this paper. We first introduc...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2007-03, Vol.56 (2), p.436-444
Main Authors: Cetiner, B.A., Jofre, L., Jiangyuan Qian, Sunan Liu, Li, G.P., De Flaviis, F.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Bandwidth
Broadband
Broadband antennas
Channels
Coplanar waveguides
Diversity
Diversity methods
Exact sciences and technology
Impedance
Indoor
indoor communications
Microelectromechanical systems
Microwave antennas
microwave laminates
Microwave technology
multielement antenna (MEA)
multipath channels
Radio frequencies
Radio frequency
Radiocommunications
Radiofrequency microelectromechanical systems
RF microelectromechanical system (RF MEMS)
Telecommunications
Telecommunications and information theory
Wireless communication
Wireless communications
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Summary:A multidisciplinary-research effort encompassing compact broadband antenna design, indoor channel characterization, and an RF microelectromechanical-system (RF MEMS) technology with its application to a diversity system for indoor wireless communications is presented in this paper. We first introduce a coplanar waveguide-fed compact wideband antenna and characterize its impedance and radiation characteristics. The antenna has a 42% impedance bandwidth covering the frequency band of 4-6 GHz. Subsequently, a series of experiments are conducted to characterize the diversity performance of a system using three elements of the proposed antenna for nonline-of-sight indoor multipath environments. From these experiments, we evaluate the performance of the diversity system by calculating power correlation coefficients, power imbalance, and diversity gain. Microwave-laminate-compatible RF MEMS process technology, which has been recently developed in the author's group, is used to construct a microelectromechanically switched pattern-diversity antenna on RT/Duroid5870 microwave laminate. Radiation and impedance characteristics of this antenna are provided, and its reconfigurability capabilities for mobile environment are discussed
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2007.891418