Development of Strategic Technologies at

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Development of Strategic Technologies at SAMEER
K.R. Kini
Email director_at_sameer.gov.in Website
www.sameer.gov.in
ELITEX 2007
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R D Efforts at SAMEER

• Atmospheric Instrumentation
• Highpower RF MW
• Linear Acceleratots
• Antennas
• Communication

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MST Radar

• For measurement of Atmospheric Parameters upto
  height of 100 Km.
• 2nd largest radar of its kind in the world.
• Operational since 1994 at Gadanki village near
  Tirupati.
• Users
• ISRO for space vehicle launch
• Atmospheric Scientists from Academic Research
  laboratories

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MST Radar Specifications

• Operating frequency 53 MHz
• Peak Tx Power 2.4 MW
• Duty ratio 2.5 max
• Antenna beam width lt 3 deg.
• No. of beams Zenith, ?20 deg. NS EW
• Altitude coverage 5 km-100 km
• Range resolution 150m
• Max. wind velocity 200 m/sec.
• Velocity resolution 0.1m/sec

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DEVELOPMENT OF HIGH POWER POWER DIVIDER
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DEVELOPMENT OF HIGH POWER DUPLEXER
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DEVELOPMENT OF HIGH POWER HYBRID-COUPLER
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High Power Amplifier
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DEVELOPMENT OF HIGH POWER TRANSMITTERS
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Wind profiler RASS

• Monitors wind profile
• RASS attachment for temp. profiling
• Pulsed Doppler Radar at 404.37 MHz
• Power 16 KW, effective aperture 80 m2
• Successful demonstration at SAMEER
• Installed at IMD, Pune and operating successfully
  for three years

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Wind Profiler Specifications

• Frequncy 404.37MHz, 0.250MHz
• Peak Transmit Power 1kW
• Duty Ratio 10 max.
• Pulse Width 2us(uncoded)
• 16us(coded)
• Antenna Type Coaxial collinear
• Antenna gain 32dB(Normal)
• Antenna Side Lobe 35dB down in Hz dir
• LNA noise temp 300 K
• Max. Doppler Frequency Measurement Capability
  4 Hz

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16 kW UHF TRANSMITTER

• Specifications
• Frequency 404.37 MHz
• Peak Power 16 kw
• Duty cycle Max 10
• PRP -40-160 micro sec
• Waveform un-coded/coded
• Cooling Forced air

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HIGH POWER DUPLEXER ASSEMBLY

• Specifications
• Insertion loss less than 1 dB
• Isolation better than 60 dB
• Control signal TTL pulses from TSG
• Power supply -30 V (1A)

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Minisodar /Phased array Sodar
Phased Array Doppler SODAR is one of the
sophisticated atmospheric probing systems used
for obtaining continuous profiles of wind and
turbulence parameters in the atmosphere.

• Applications
• Environmental monitoring
• Wind energy site evaluation
• Meteorology
• Environmental impact studies

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Minisodar /Phased array Sodar Specifications
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Transmitter for Doppler Weather Radar

• Use of the Tetrode based hard tube modulator
  configuration
• Designed to achieve a stringent phase noise
  performance
• Specifications
• Freq. range 2.7-2.9 GHz
• Peak power 1.2 MW
• Pulse width 1,2,3 microsecond
• PRF 250-1200 Hz
• Microwave source Klystron

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Doppler Weather Radar, SHAR , Sriharikota.
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2 kW VHF Amplifier for VECC, Kolkata

• Specifications
• Technical specifications
• RF Output 2 kW max.
• Operating modes Selectable CW/Pulsed
• Frequency 35 MHz
• Gain 63dB
• Power stability ? ? 1
• Phase stability ? ? 1
• Harmonic level Better than 20dBc
• VSWR ? 2
• Efficiency 49
• Duty (0.1 30) in 10 steps
• Electrical Requirements
• Input Voltage 415 Volts, 3 ?, 50Hz
• Input power 3.5kVA max.
• Dimensions
• (WXDXH) in mm3 (1400 X 800 X 2000)
• Weight 400 Kg. (approx)

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Differential Phase Shift Circulators

• Specifications
• Frequency 2998
• Bandwidth ? 5MHz
• Forward Pulse Power 6 MW
• Average power 5 kW
• Insertion Loss lt0.2dB
• Isolation gt25dB
• Return loss of all ports gt 23 dB
• Cooling Water Flow 5 lit/min
• Dimensions 748x210x185 mm3
• Pressurizations 30psi (SF6)

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Linear Accelerator

• Linac Tube
• Modulator
• Dielectric Window
• Primary Collimeter
• Secondary Collimeter
• Gantry
• Microwave Subsystem
• DI Water Cooling plant
• High voltage power supply
• Computer Console
• System Health Monitor

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6 MV LINAC TUBE
RF Window
Electron Gun
Resonant Cavities
Target
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High Power Modulator

• The transmission line type pulsers
• are a popular choice as high power
• source to drive klystrons and
• magnetrons used in various
• applications.
• These pulsers are capable of
• generating pulses of width ranging
• from 0.25 µsecs to few
• microseconds upto prf ranging to
• hundreds of pulses per second.

• The 3-Ø input to the Linear power supply
  generates a
• reasonably regulated dc supply between 10 KV to
  13 KV
• and can deliver current upto 5 Amps depending
  on the
• peak and average power.

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Design and development of High Power Dielectric
Window
Output Parameters Thickness of ceramic
2.85mm Diameter of ceramic 76 85mm Length of
circular waveguide 32.5mm I.D.of water adapter
6.5mm
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Antennas for LCA

• 4 antennas developed for different applications
• Air worthiness certificate for fitment to
  supersonic aircraft obtained

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Wide Band Antenna
4-8 GHz
2-4 GHz
18-40 GHz
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Indigenous Development of Altimeter Antenna
Altimeter horn antennas are being indigenously
developed at SAMEER-CEM. Several prototypes that
meet stringent electrical, mechanical and
environmental specifications have already been
developed. Subsequent to flight-trials and
design approval by the inspection agency, 34
air-worthy antennas delivered.
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Broad Band Omni Directional Antennas

• Salient Features
• True Omni-directional performance
• Monopole antenna without ground plane
• Low cost construction
• Good pattern and impedance characteristics over
  octave bandwidth
• Mechanically ruggedized design
• Patent registered. Registration No.982/MAS/99

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Bore Sight Reference Antenna for NRSA

• Features
• Operates in S and X band
• Circularly polarized
• For boresight application
• 1.2 m reflector

• Specifications
• Frequency 1 to 10 GHz
• Gain 25 dBi at 2.254 GHz
• 32 dBi at 8.212 GHz
• Beamwidth 7.50 at 2.254Hz
• 2.00 at 8.212 GHz
• Side lobe 10 dB
• VSWR 21

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Microwave Data Link System (MDLS)

• Features
• Fully solid state system with state of the art
  technology
• PLL modulator at 2.5GHz
• System health status transmission through vhf
  radio
• 120 digital and Analogue parameter can be modified

Specifications Frequency 7.7 to 8.4GHz RF
band width 40 MHz Tx Power 30 dBm Rx
Sensitivity -75 dBm Base band 20 Hz to 10 MHz
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Integrated Radio Line Modem

• IRLM transfers the data from point to multipoint.
  
• Due to very critical nature of data, the link is
  made highly reliable and with hot standby option.
  
• The data is communicated through both radio and
  line mode.
• This feature helps to choose either of the medium
  of transfer depending upon territory conditions
  and strategic situations.

IRLM Unit
Configuration Unit
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Integrated Radio Line ModemProduct Highlights

• Frequency hopping technique for minimizing
  jamming in radio mode
• Uses very low RF power
• Automatic changeover from Radio to Line mode of
  operation
• Suitable error correction schemes for ensuring
  error free communication
• Ruggedised construction to meet EMC
  specifications.
• Configuration through computer for fast and error
  free operation mode set-up

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RACON
Radio Beacon is used for ship navigation. It
responds to the interrogation by a ship within 20
nautical miles and sends its identity to the ship
within very short time Worldwide only one US
based company supplies this unit. SAMEER has
successfully developed and demonstrated RACON to
DGLL. 2 numbers will be made and handed over for
field trials by DGLL
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EM Signature Analysis from Digital Equipment
Remote identification of Computer transactions
making use of EM Emissions from associated
hardware Identification of keyboard and serial
bus data activity and regeneration Computer
video terminal images including
Passwords/PIN. Reproduction of video terminal
images.
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EM emission from RS-232 lines and Data Extraction

• Source High Voltage Swing (/-10V)
• Process of Extraction
• Acquisition - Wide band antenna
• Digitization
• Filtering and Shaping
• Creation of Data Base
• (EM Signatures of all ASCII values)
• Character Recognition
• Data Capturing terminal application

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Video displays Units EM Radiation

• Source High Speed clock signals Amplification
  in CRT
• b. Process of Extraction
• Acquisition
• Scanning and Processing
• Sync information extraction
• Pixel map storage
• Grey Scale mapping
• Signal Processing
• Reproduction snapshot of the video screen

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ITO Coating for EMI Suppression SAMEER and
I.I.T.(M)
DC Magnetron Sputtering Technology for coating
ITO on glass and plastics for reduction of
EMI. Application in electronics equipments like
video display terminals, ATC glass
windows,secured data centres, Satellite Signal
Monitoring Stations. Coating at Room Temperature
on synthetic materials without damaging the
characteristics of the material. Results are
comparable to the ITO Coated sheets at elevated
temperature . Good conductivity of coated sheets
with cost benefit.
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Thank You