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Ritsumeikan Univ.KO-587
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10 36 574.5 780 re
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14.25 0 0 14.25 40.5239 788.25 Tm
(Design and Evaluation of UWB-MIMO Antenna System Using Transmission Syst\
em)Tj
9.112 -1.211 Td
(Model Including the Human Body Effects)Tj
/TT1 1 Tf
12 0 0 12 44.5 740.25 Tm
(The focus of this thesis is design and evaluation of UWB-MIMO antenna sy\
stem using transmission)Tj
-1 -1.5 Td
(system model including the human body effects. In Chapter 1, the backgro\
und and the overview of my)Tj
0 -1.5 TD
(research are explained as the introduction. After formulation of the sim\
ulation method in Chapter 2, ultra)Tj
T*
(wideband transmission characteristics including the human hand effects a\
re evaluated in terms of the auto-)Tj
T*
(correlation function in Chapter 3. )Tj
T*
(In Chapter 4-5, UWB transmission model including the human body effects \
is presented in order to evaluate)Tj
T*
(the actual performance of the UWB antennas placed in the vicinity of the\
human body. As the calculated)Tj
T*
(results, there are two key issues to be examined in terms of the variati\
on of the eigenvalue distribution of)Tj
T*
(UWB-MIMO channel matrix caused by human body: 1\) average power of first\
eigenvalue determined by the)Tj
T*
(human hand, 2\) stochastic characteristics of the waves reflected from h\
uman torso.)Tj
T*
(In Chapter 6, a new GCPW-fed asymmetric UWB monopole antenna is proposed\
. By connecting the radiator)Tj
T*
(to the ground with a short post over the slit-line, the ultra-wideband c\
haracteristics and the reduction of the)Tj
T*
(power absorption by the human finger are achieved. By introducing the pr\
oposed configuration, the operating)Tj
T*
(bandwidth is expanded from 2.2GHz to 7.3GHz based on the criterion in th\
e radiation efficiency of 50%.)Tj
T*
(In Chapter 7, the actual performances of the proposed antenna are evalua\
ted by using the transmission model)Tj
T*
(proposed in Chapter 5. As the results, proposed configuration can achiev\
e up to 51% improvement of channel)Tj
T*
(capacity compared to the conventional configuration.)Tj
ET
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