Experimental Study on Full-Polarization Micro-Doppler

of Space Precession Targetin Microwave Anechoic Chamber

Liu Jin

National University of Defense Technology

Changsha, Hunan China

1. Introduction

2. Wide-band Scattering Properties

3. Full-Polarization Micro-Doppler Model

4. Experiment Results Analysis

1. Introduction

Kinematic Feature Geometric Feature

Micro-Motion

Target PolarizationMicro-Doppler

2. Wide-band Scattering Properties

losR

1Π

2Π

Nose structer: Ideal scatterer

Ring structer: Sliding scatterer

3. Full-Polarization Micro-Doppler Model

0( ) ( ) 2( ) ( ) exp( 2 )

( ) ( )HHr HVr t

VHr VVr

s t s t f Rt t j

s t s t c

rs S

precession angle

p

O

o

l

rp

r

tR0R

average aspect angle

initial angle

coning frequencyposition

3. Full-Polarization Micro-Doppler Model

losR

1Π

2Π

Sine Function Type

0 02 sin 21 sin cos( )2

ij p tdij p

d f f d Rf z t

dt c c dt

Influence of the polarization matrix phase Ignorable distance

3. Full-Polarization Micro-Doppler Model

losR

1Π

2Π

01

2

21 ( cos sin sin sin( )2

sin sin sin sin( )(cos cos sin sin cos( )))

1 (cos cos sin sin cos( ))

ijdij p p

p p p

p

d kff t

dt ct t

t

02

2

21 ( cos sin sin sin( )2

sin sin sin sin( )(cos cos sin sin cos( )))

1 (cos cos sin sin cos( ))

ijdij p p

p p p

p

d kff t

dt ct t

t

Non-Sine Function Type

4. Experiment results analysis

4. Experiment results analysis

4. Experiment results analysis

HH

HV

VH

VV

Nose Mid-Ring Bottom-Ring10e-9 10e-8 10e-8

10e-10 10e-9 10e-9

4. Experiment results analysis

Time /s

Freq

uenc

y /H

z

0 2 4 6 8 10 12 14 16 18

-15

-10

-5

0

5

10

15

Time /s

Freq

uenc

y /H

z

0 2 4 6 8 10 12 14 16 18

-15

-10

-5

0

5

10

15

4. Experiment results analysis

时间 /s

频率

/Hz

0 5 10 15-15

-10

-5

0

5

10

15

时间 /s

频率

/Hz

0 5 10 15-15

-10

-5

0

5

10

15

4. Experiment results analysis

Measuerd

Theoretical

Thank you!