Title: Impact of Ultra Wide-Band Antennas on Communications in a Spatial Channel
1Impact 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
2Outline
- 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
3UWB System Model
4UWB System Model
5UWB System Model
6UWB System Model
7Complete UWB Chain
Ant_Tx
Ant_Rx
Channel
Tx
Rx
IEEE
Ray Tracing
Directional
Omni-Directional
8Complete UWB Chain
Ant_Tx
Ant_Rx
Channel
Tx
Rx
9FirstChannel Impulse Response of the Environment
10IEEE Channel Model
11Ray-tracing Channel Model
x10-7
12Discrete Channel Impulse Response
13SecondAntenna Impulse Response
14HFSS Radiation Pattern of Horn Antenna
Freq 6.5 GHz
15HFSS ? Gain in dB from Radiation Pattern
Freq 3 GHz
16HFSS ? Gain in dB from Radiation Pattern
Freq 3.5 GHz
17HFSS ? Gain in dB from Radiation Pattern
Freq 4 GHz
18HFSS ? Gain in dB from Radiation Pattern
Freq 4.5 GHz
19HFSS ? Gain in dB from Radiation Pattern
Freq 5 GHz
20HFSS ? Gain in dB from Radiation Pattern
Freq 5.5 GHz
21HFSS ? Gain in dB from Radiation Pattern
Freq 6 GHz
22HFSS ? Gain in dB from Radiation Pattern
Freq 6.5 GHz
23HFSS ? Gain in dB from Radiation Pattern
Freq 7 GHz
24HFSS ? Gain in dB from Radiation Pattern
Freq 7.5 GHz
25HFSS ? Gain in dB from Radiation Pattern
Freq 8 GHz
26HFSS ? Gain in dB from Radiation Pattern
Freq 8.5 GHz
27HFSS ? Gain in dB from Radiation Pattern
Freq 9 GHz
28HFSS ? Gain in dB from Radiation Pattern
Freq 9.5 GHz
29HFSS ? Gain in dB from Radiation Pattern
Freq 10 GHz
30Bowtie Antenna
Antenna radiation pattern
31Step Response of Bowtie Antenna
32Overall Channel Impulse Response
33Rotation of Tx Antennas in SISO System
34Omni-Directional vs. Directional Antennas in
SISO MISO
35Future 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.
36Thank you