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Polarimetric Solid State Radar Design for CASA Student Test Bed. Alexandra Litchfield. Objective. To design a Dual Polarimetric Solid State Doppler Radar for the CASA student Test Bed. Possible Radar Localization @ Aguadilla, PR. Possible Radar Localization @ Mayaguez, PR. Definition: - PowerPoint PPT Presentation
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Polarimetric Solid State Radar Design for CASA Student Test
Bed
Polarimetric Solid State Radar Design for CASA Student Test
Bed
Alexandra LitchfieldAlexandra Litchfield
ObjectiveObjective
To design a Dual Polarimetric Solid State Doppler Radar for the CASA student Test Bed.
To design a Dual Polarimetric Solid State Doppler Radar for the CASA student Test Bed.
Possible Radar Localization @ Aguadilla, PRPossible Radar Localization @ Aguadilla, PR
Possible Radar Localization @ Mayaguez, PRPossible Radar Localization @ Mayaguez, PR
Why Solid SateWhy Solid Sate
Definition: Solid State Devices and
Systems are based entirely on semiconductor.
There is no mechanical action on a solid state device but electromagnetic action takes place.
Current is confined to solid elements.
Definition: Solid State Devices and
Systems are based entirely on semiconductor.
There is no mechanical action on a solid state device but electromagnetic action takes place.
Current is confined to solid elements.
Advantages: Does not need a high
voltage modulator. Use less power (kW from
Magnetron are eliminated) Coherent radars can be
made. Pulse Compression can be
used.
Advantages: Does not need a high
voltage modulator. Use less power (kW from
Magnetron are eliminated) Coherent radars can be
made. Pulse Compression can be
used.
Radar RequirementsRadar Requirements
Radar Freq: 9.5-9.6 GHz (X Band) Peak Transmitter Power: 25W Minimum Detectable Signal Power: -100dBm Antenna Gain: 12dB Horizontal Antenna Beam Width: 6 degrees Vertical Antenna Beam Width: 6 degrees Pulse Width: 30us Max Range: 6km
Radar Freq: 9.5-9.6 GHz (X Band) Peak Transmitter Power: 25W Minimum Detectable Signal Power: -100dBm Antenna Gain: 12dB Horizontal Antenna Beam Width: 6 degrees Vertical Antenna Beam Width: 6 degrees Pulse Width: 30us Max Range: 6km
Project PhasesProject Phases Radar Front End
TR Module Transmit/Receive Module Circuit Design Component Layouts Build and Test
Phase shifter Phase shifter circuit design Component Layouts Build and Test
Master clock distribution Digital Signal Processing Antenna Implementation Integration
Radar Front End TR Module
Transmit/Receive Module Circuit Design Component Layouts Build and Test
Phase shifter Phase shifter circuit design Component Layouts Build and Test
Master clock distribution Digital Signal Processing Antenna Implementation Integration
TR Original Preliminary DesignTR Original Preliminary Design
Directional Coupler
Directional Coupler
PAPA
OSCOSC
Circ.Circ.
LN
AL
NA
LimiterLimiter
SS Po
we
r C
om
bin
er
Po
we
r C
om
bin
er
Receiver P
ath
Transmit Path
Calibration Path
IF
IF
LN
AL
NA
PA
PA
Pre
AP
reA
Power CombinerPower
Combiner
SS
LOLO
Divider / CombinerDivider / Combiner
RxTx
IF
RxTx
Preliminary Design for
Radar Front End
Preliminary Design for
Radar Front End
Ø ØPhase shifter
Phase shifter
Cal
RF
Phase Shifter Preliminary DesignPhase Shifter Preliminary Design
∑∑ ∑∑
IQ
I Q
Ø
90 Hybrid
Variable Amp.
90 Hybrid
90 Hybrid
NoiseNoise
Vector Mod
Vector Mod
Vcc1
Vcc2
I
Q
IF2
IF1
LO1LO1
20MHz
IQ
IF2
IF2
IF
PAPA
RFDirectional
CouplerDirectional
Coupler
Po
we
r C
om
bin
er
Po
we
r C
om
bin
er
LN
AL
NA
Circ.Circ.
LimiterLimiterLO2LO2
LO2LO2
Vector Mod
Vector Mod
Vcc1 Vcc2
LO1LO1
20MHz
IF1
I Q
Design with Vector Modulator Phase Shifter
Design with Vector Modulator Phase Shifter
Tx
Rx
One Polarization
Channel
One Polarization
Channel
Vector Mod
Vector Mod
Vcc1
Vcc2
IF2
PA
PA
Dire
ctio
na
l C
ou
ple
rD
irect
ion
al
Co
up
ler
Circ.Circ.
LO2LO2
NoiseNoise
Po
we
r C
om
bin
er
Po
we
r C
om
bin
er LN
AL
NA
LimiterLimiter
LO1LO1
IF1
LO1LO1
IF1T
ransmit P
ath
Receive P
ath
Cal P
athPhase shifter
ComponentsComponents Mixer: Alters the carrier
frequency of the signal. Oscillator: Controls the
frequency used to sincronized the radar.
Directional Coupler / Power Divider: Couples part of the transmision power in to the transmision line.
Mixer: Alters the carrier frequency of the signal.
Oscillator: Controls the frequency used to sincronized the radar.
Directional Coupler / Power Divider: Couples part of the transmision power in to the transmision line.
Limiter: Circuit that allows to pass the unaffected received signal
Low Noise Amplifier (LNA): Amplifies weak signals captured by the antenna.
Circulator: Redirect signal that comes in an out from/to transmisor and receptor.
Limiter: Circuit that allows to pass the unaffected received signal
Low Noise Amplifier (LNA): Amplifies weak signals captured by the antenna.
Circulator: Redirect signal that comes in an out from/to transmisor and receptor.
Radar’s Dual Polarized AntennaRadar’s Dual Polarized Antenna
Dual polarization Antenna Operating at 9.5GHz
Array of Apertured Coupled Antennas
Dual polarization Antenna Operating at 9.5GHz
Array of Apertured Coupled Antennas
Received Power CalculationsReceived Power Calculations
G=16dB; Ganancia R=6km; Maximum Range C=3x10^8 m/s; velocity of
light Pt=2W Power Transmitted
by each channel. H=30usec; Pulse Width F= 9.5 GHz Lambda=c/f =.031579 K=dielectric factor (.93
for water)
G=16dB; Ganancia R=6km; Maximum Range C=3x10^8 m/s; velocity of
light Pt=2W Power Transmitted
by each channel. H=30usec; Pulse Width F= 9.5 GHz Lambda=c/f =.031579 K=dielectric factor (.93
for water)
Z=10dBz; 10=10log(P), P=10
MDS = -100dBm N=2.66x10^9 G=39.81W Pr=1uW=-30dBm
Z=10dBz; 10=10log(P), P=10
MDS = -100dBm N=2.66x10^9 G=39.81W Pr=1uW=-30dBm
Component LayoutComponent LayoutPower Amplifier Low Noise Amplifier
HMC48LP5 HMC564LC4
Component LayoutComponent LayoutMixer
HMC412M58G
Future Work Future Work
To construct and measure parameters for the TR Module and Phase Shifter.
Digital Signal Processing. Antenna Implementation Integration Test and Measure
To construct and measure parameters for the TR Module and Phase Shifter.
Digital Signal Processing. Antenna Implementation Integration Test and Measure
QuestionsQuestions