Proposed Ultra Wideband for Implant
Wireless Body Area Network
Iji Ayobami B.
MQ41955447
Supervised by
Michael Heimlich
&
Tony Parker
1
Contents
 Introduction
 Proposed Ultra Wideband for Implantable
Wireless Body Area Network
 UWB design focus and constraints
 Implantable WBAN Requirements for GHz Radio
 UWB Systems
 CMOS process
 Design Method
 Conclusion
2
Introduction
 The purpose of this thesis is to design Ultra Wideband
(UWB) Impulse Radio (UWB-IR) transceiver, consisting
of a non-coherent receiver and a carrier less transmitter.
 The major interest is to optimize and design UWB-IR
transceiver with low power, low noise and adaptive
circuits capable of transmitting image inside the human
body.
3
Proposed Ultra Wideband for Implant
Wireless Body Area Network
Aim:
• Implantable WBANs : health monitoring and
treatment
• To carry out measurements which include telemetry
and video streaming
• UWB is investigated as a candidate for the
Implantable WBANs
4
UWB design focus and constraints
Target:
• UWB Technology (3.1 - 10.6) GHz
• Better Multipath
Proposed UWB Radio size
• Low Power
Transparent
• Low cost
12.8mm
• Radiation hard
• Wireless sensor
6mm
• Non coherent
• Low complexity
• Adaptive circuit
• Very smart circuit
• Very fast (Pico Second)
5
Implantable WBAN Requirements for GHz Radio
(UWB IEEE 802.15.6 Proposal PHY)
•
•
•
•
•
•
•
UWB technology (3.1 - 10.6) GHz
EIRP = -41.3 dBm/MHz
Data rate = up to 10Mbps
Distance = 2cm or more
Battery life = 10 years maybe
Modulation: BPSK, QPSK
Antenna type: Magnetic e.g. loop antenna
6
UWB Systems
• Types of radio:
– IR – UWB (Impulse response)
– MC – UWB (Multicarrier)
• IR UWB
– Less complex hardware implementation
– Less demanding digital processing
– Greater resilience to multipath fading
7
CMOS Process
• Silicon on sapphire (Al2O3) 0.25micon CMOS
process (sapphicon lib.)
– Insulating substrate
– Better isolation between circuit elements
– Less advance manufacture process (better
performance)
– 0.25um SOS technology is similar to 0.13um in
bulk silicon (two generations ahead).
8
Design Method 1.
 Definition of Implantable UWB system requirements
 Design of a Non-Coherent UWB Transceiver system
 Transistor modelling/Verification of Sapphicon Library
9
Design Method 2.
Radio Frequency
Analogue Baseband
Digital Baseband
System & Peripherals
Antenna
Modulation & Demodulation
Front end
(LNA, PA,
Filters etc.)
Analogue
Baseband
Digital
Baseband
(Pulse det.
Pulse gen. AD)
(encoding
Decoding)
Core
memory
Human
interface
Power
Battery
Fig. 1. UWB Transceiver Architecture
10
Design Method 3.
Fig. 2. Transceiver Architecture
11
Design Method 4.
Design of a Transceiver using CMOS transistor
This include sub-circuit design
 Low Noise Amplifier
 Buffer Amplifier
 Pulse Generator
 Pulse shaping filters
 Power Amplifier
 Mixers (Passive and Active)
12
Conclusion
•
•
•
•
We are able to establish the technology to use
System requirement has been established
System design
We have commence RF front end design
13
Thank you
Questions & Answer
14