Transcript RF Signal Wireless Test Lab

RF Signal Wireless
Test Lab
Weekly Report 1:
Objective:
Familiarize all group members
with RF wireless transmission
capabilities and components.
RF Signal Wireless Test Lab
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We met with Graduate Research Assistants and discussed
possible objectives as to how we can enhance certain concepts
of the original design.
Researched devices such as Mixers, Filters, Circuit Designs,
Oscillators, Amplifliers, and RF Signal Generators for Base Band
Frequency
Familiarize ourselves with the actual design and breakdown the
frequency receiver/transmitter capabilities for the 900 MHz and
2.4 GHz frequency signals.
Arranged lab access hours with Graduate Research Assistants for
further weekly meetings.
RF Signal Wireless Test Lab
TRANSMITTER
RECEIVER
Information
input
m(t)
Signal
processing
Carrier
circuits
s(t)
Transmission
medium
(channel)
r(t)
Carrier
circuits
Signal
processing
~
m(t)
To information
sink (user)
There are 3 basic elements to every communication system:
 Transmitter: converts the message signal produced by the source
of information into a form suitable for transmission over the
channel.
 Channel: physical medium that connects the transmitter and
receiver.
 Receiver: operates on the received signal so as to reconstruct a
recognizable form of the original message signal.
RF Signal Wireless Test Lab
Frequency
Band
0.3-3 GHz
3-30 GHz
Designation
Ultrahigh
Frequency
(UHF)
Superhigh
Frequency
(SHF)
Propagation
Characteristics
Typical Users
LOS propagation, cosmic
noise
VHF television, FM two-way radio,
AM aircraft communication, aircraft
navigational aids
LOS propagation; rainfall
attenuation above 10 GHz,
atmospheric attenuation
because of oxygen and
water vapor, high water
vapor absorption at 22.2
GHz
UHF television, cellular telephone,
navigational aids, radar, GPS,
microwave links, personal
communication systems
RF Signal Wireless Test Lab
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Amplifier: enhances current signal to allow stronger
frequency
Filter (low-pass): bypass unwanted high-frequency signals
Mixer – combine both base band and oscillated
frequency signals into one
Oscillator – generates frequency signal for a determined
value
Signal Generator – provides base band frequency
through an external median
RF Signal Wireless Test Lab
RF Signal Wireless Test Lab
Current Design is able to transmit a 900 Mhz
and 2.4 MHz frequency
 The 5.7 MHz transmission capability has been
redesigned due to excessive voltage provided by
power generator/splitter
 Efficient in providing consistent results for
given frequency capabilities
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RF Signal Wireless Test Lab
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Take the current design layout for the 900Mhz
and 2.4 GHz transmission rate and redesign
platform onto a PCB( printed circuit board )
Modifying current 5.7 GHz transmitter/receiver
design onto new model
Find a constructive Application process for the
given frequencies once implemented onto PCB
RF Signal Wireless Test Lab
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We will have a finished layout of website where all
presentations, progress reports, and research papers will
be available for viewing
Test the 5.7 GHz frequency design to see what
improvements can be made
Start researching components for proposed PCB model