Impact of Ultra Wide-Band Antennas on Communications in a Spatial Channel - PowerPoint PPT Presentation

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Impact of Ultra Wide-Band Antennas on Communications in a Spatial Channel

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Impact of Ultra Wide-Band Antennas on Communications in a Spatial Channel Mohamed El-Hadidy & Thomas Kaiser University of Duisburg-Essen Faculty of Engineering ... – PowerPoint PPT presentation

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Title: Impact of Ultra Wide-Band Antennas on Communications in a Spatial Channel


1
Impact of Ultra Wide-Band Antennas
onCommunications in a Spatial Channel
Mohamed El-Hadidy Thomas Kaiser University of
Duisburg-Essen Faculty of Engineering, Department
of Communication Systems, Bismarckstr. 81, 47057
Duisburg, Germany Email el-hadidy_at_nts.uni-due.de
2
Outline
  • Mathematical frame of UWB system model
  • How the whole chain of the UWB transmisson
    modeled, including the antennas effects?
  • Omni-directional or Directionl antennas?
  • Impact of antennas on the spatial channel and
    some simulation results.
  • Future work

3
UWB System Model
4
UWB System Model
5
UWB System Model
6
UWB System Model
7
Complete UWB Chain
Ant_Tx
Ant_Rx
Channel
Tx
Rx
IEEE
Ray Tracing
Directional
Omni-Directional
8
Complete UWB Chain
Ant_Tx
Ant_Rx
Channel
Tx
Rx


9
FirstChannel Impulse Response of the Environment
10
IEEE Channel Model
11
Ray-tracing Channel Model
x10-7
12
Discrete Channel Impulse Response
13
SecondAntenna Impulse Response

14
HFSS Radiation Pattern of Horn Antenna
Freq 6.5 GHz
15
HFSS ? Gain in dB from Radiation Pattern
Freq 3 GHz
16
HFSS ? Gain in dB from Radiation Pattern
Freq 3.5 GHz
17
HFSS ? Gain in dB from Radiation Pattern
Freq 4 GHz
18
HFSS ? Gain in dB from Radiation Pattern
Freq 4.5 GHz
19
HFSS ? Gain in dB from Radiation Pattern
Freq 5 GHz
20
HFSS ? Gain in dB from Radiation Pattern
Freq 5.5 GHz
21
HFSS ? Gain in dB from Radiation Pattern
Freq 6 GHz
22
HFSS ? Gain in dB from Radiation Pattern
Freq 6.5 GHz
23
HFSS ? Gain in dB from Radiation Pattern
Freq 7 GHz
24
HFSS ? Gain in dB from Radiation Pattern
Freq 7.5 GHz
25
HFSS ? Gain in dB from Radiation Pattern
Freq 8 GHz
26
HFSS ? Gain in dB from Radiation Pattern
Freq 8.5 GHz
27
HFSS ? Gain in dB from Radiation Pattern
Freq 9 GHz
28
HFSS ? Gain in dB from Radiation Pattern
Freq 9.5 GHz
29
HFSS ? Gain in dB from Radiation Pattern
Freq 10 GHz
30
Bowtie Antenna
Antenna radiation pattern
31
Step Response of Bowtie Antenna
32
Overall Channel Impulse Response
33
Rotation of Tx Antennas in SISO System
34
Omni-Directional vs. Directional Antennas in
SISO MISO
35
Future Work
  • Investigating the diversity added to the UWB
    MIMO system using the antennas impact (e.g.
    using different types of antennas, rotating the
    antennas, etc.)
  • Investigating the coupling effect appearing
    among the neighbouring antennas either at
    transmit or receive sides for UWB MIMO system.
  • Embedding the whole antenna properties which is
    angular and frequency dependent into the system
    like polarization and input impedance, etc.

36
Thank you
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