design and fabrication of small-sized radar-radiometer ......1 53rd rd annual annual fuze fuze...
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5353rdrd Annual Annual FuzeFuze Confer enceConfer enceMay 1 9 May 1 9 –– 21, 200921, 2009
Design and Fabrication of SmallDesign and Fabrication of Small--Sized Sized RadarRadar--Radiometer Sensors with a Single Radiometer Sensors with a Single
Antenna Configuration in WAntenna Configuration in W--Band for Band for SensorSensor--FuzedFuzed SystemsSystems
WanWan --JooJoo Kim, Kim, MyungMyung -- SukSuk Jung,Jung,WonWon -- Young Young UhmUhm, , JaeJae -- Hyun Hyun ChoiChoi
FuzeFuze Group, Agency for Defense Development Republic of Group, Agency for Defense Development Republic of Kor e aKor e a
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Why Millimeter Wave for Fuzes ?W-Band Radar / Radiometer Fuzing Sensors Experimental Results Summary
Contents
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Why Millimeter Wave for Fuzes ?
Advantages of MMW Fuzes
Located between microwave and IR, MMW (millimeter wave) can overcome drawbacks of the bands.
MMW fuzes can be structurally small in size.
If the carrier frequency is high, we can generally get the high space resolution.
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Why Millimeter Wave for Fuzes ?
Passive Radiometer
Receive the energy emitted from the targets and backgrounds.
Receive the reflected energy of sky radiation by the targets and backgrounds.
Contrasts exist between the targets and backgrounds.
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Why Millimeter Wave for Fuzes ?
Active Radar
Detect the portion of the transmitted signal scattered from a target in the direction of the receiver.
Since the reflectivity of a target is larger than that of the clutter, there exists signal level difference between the target and clutter.
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Common Tx / Rx with a single antenna configuration
FMCW radar / TP radiometer
Simultaneous operation
Compact size
W-Band Radar / Radiometer Fuzing Sensors
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W-Band Radar / Radiometer Fuzing Sensors
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W-Band Radar / Radiometer Fuzing Sensors
Front–end & Antenna
Pout : 11 dBm
Rx Loss : 6.5 dB
NF : 10.2 dB
Ant. Gain : 23 dB
Ant. BW : 12.5°
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W-Band Radar / Radiometer Fuzing Sensors
Duplexer
OMT & Polarizer
Insertion Loss : < 0.5 dB
Isolation : > 30 dB
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W-Band Radar / Radiometer Fuzing Sensors
MMIC Receiver
LNA + Mixer
LNA NF : 3 dB
Total CL : 6.5 dB
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W-Band Radar / Radiometer Fuzing Sensors
VCO & Magic Tee
VCO Pout : 15.5 dBm
Sweep BW : 300 MHz
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W-Band Radar / Radiometer Fuzing Sensors
VCO & MMIC Module
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W-Band Radar / Radiometer Fuzing Sensors
Radar & Radiometer Signal Processing
Radar BW : 2 MHz
Radiometer BW : 500 MHz
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Radar & Radiometer Signal Processing
LNA BPF
AGC
Log Offset
matching
HPF Detector Audio Amp. Audio Amp. & Offset
DividerEnvelope
Beat
Magnitude
Mixer Out
Radar
Radiometer LNA
W-Band Radar / Radiometer Fuzing Sensors
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Experimental Results Target Detection (1)
Top : radar
Bottom : radiometer
Range : 25 m
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Experimental Results Target Detection(2)
Top : radar
Bottom : radiometer
Range (FFT) : 60 m
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Summary W-band radar / radiometer fuzing sensorsCompact size with MMIC receiverHigh output power because of the low insertion loss of duplexer (OMT & polarizer)MMW fuzing sensors will be widely used because of high resolution and small size.
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Thank YouThank You
FuzeFuze Group, Agency for Defense Development Republic of Group, Agency for Defense Development Republic of Kor e aKor e a