Antena Seminar
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Transcript of Antena Seminar
![Page 1: Antena Seminar](https://reader038.fdocuments.in/reader038/viewer/2022102700/5478b0bdb4af9f73348b4584/html5/thumbnails/1.jpg)
ANTENNA DEPLOYMENT IN NANOSATELLITES AND PICOSATELLITES
By
GIREESH
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SATELLITES
Natural or artificial object revolving around the earth.
ClassificationBigger satellitesSmaller satellites
• Minisatellites• Microsatellites• Nanosatellites• Picosatellites
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ANTENNA
Essential part for communicationSender antenna and receiver
antennaDownlink and uplinkFrequency C band and Ku band
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ANTENNA DEPLOYMENT
Antennas for bigger satellites
Antennas for smaller satellites Nanosatellites and
Picosatellites
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DEPLOYMENT MECHANISMS
Nylon wire melting technique
Tape measure housing
Electromagnetic plunger holding technique
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NYLON WIRE MELTING TECHNIQUE
Principle of operation Nichrome wireAntenna holding technique
•Rolled antenna•Rolled antenna with housing •Flexible band deployment mechanism•Antenna bent around the guide
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ROLLED ANTENNA
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ROLLED ANTENNA WITH HOUSING
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FLEXIBLE BAND DEPLOYMENT MECHANISM
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ANTENNA BENT AROUND THE GUIDE
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ELECTRICAL INTERFACE
Objective
• Low Power • Time• Feedback• Microcontroller• Nylon wire• Power Mosfet• Feedback element• Battery• Regulator
• Components used
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CIRCUIT DIAGRAM
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WORKING OF CIRCUITPower onPWM input to mosfet from
microcontrollerNichrome wire heatingNylon wire meltingAntenna deploymentFeedback to microcontroller
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NICHROME WIREGauges of Nichrome wireHeating response
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TAPE MEASURE HOUSING TECHNIQUEMeasure housingRollers to reduce the friction
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ELECTROMAGNETIC PLUNGER HOLDING METHOD
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REQUIRED SPECIFICATION
Temperature rangeVibrationPower consumptionReliableLong life
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PRE LAUNCHING TESTS FOR SATELLITES
ElectricalMechanicalThermal testVibration testThermal vacuum test
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DRAWBACKSHigh costTime delay in responding
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FUTURE
“ FEMTO-SATELLITE”
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THANK YOU