Miniaturized Design of Microstrip-Fed Slot Antennas for MIMO System Applications
Date Issued
2010
Date
2010
Author(s)
H.Chen, Richard
Abstract
In this thesis, a miniaturized design of microstrip-fed slot antennas is presented. By adding C-shaped rings inside the slot, the antenna size is reduced and dual-band characteristic may also be obtained. The C-shaped rings are used as inductive loadings to enhance the slow-wave effects leading to the effective propagation wavelength and the required antenna resonant lengths can be shorten. The mechanism, location in the slot, and dimensions of C-shaped rings are extensively studied and the optimization is made to effectively reduce the antenna size. Besides antenna size reduction, the C-shaped rings can produce an additional impedance-matched deep so that the impedance bandwidth can cover the dual-band specification of IEEE 802.11a/b/g/n. Taking advantage of size reduction by using C-shaped rings in slot antennas, a four-element open-slot diversity antenna for MIMO system application is also proposed. It shows good pattern and polarization diversity characteristics. The system performances are studied by calculating the correlation coefficients, mean effective gains, and effective diversity gains.
Subjects
miniaturized antenna
slot antenna
MIMO system
diversity antenna
Type
thesis
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