antena seminar

ANTENNA DEPLOYMENT IN NANOSATELLITES AND PICOSATELLITES

By

GIREESH

SATELLITES

Natural or artificial object revolving around the earth.

ClassificationBigger satellitesSmaller satellites

• Minisatellites• Microsatellites• Nanosatellites• Picosatellites

ANTENNA

Essential part for communicationSender antenna and receiver

antennaDownlink and uplinkFrequency C band and Ku band

ANTENNA DEPLOYMENT

Antennas for bigger satellites

Antennas for smaller satellites Nanosatellites and

Picosatellites

DEPLOYMENT MECHANISMS

Nylon wire melting technique

Tape measure housing

Electromagnetic plunger holding technique

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

ROLLED ANTENNA

ROLLED ANTENNA WITH HOUSING

FLEXIBLE BAND DEPLOYMENT MECHANISM

ANTENNA BENT AROUND THE GUIDE

ELECTRICAL INTERFACE

Objective

• Low Power • Time• Feedback• Microcontroller• Nylon wire• Power Mosfet• Feedback element• Battery• Regulator

• Components used

CIRCUIT DIAGRAM

WORKING OF CIRCUITPower onPWM input to mosfet from

microcontrollerNichrome wire heatingNylon wire meltingAntenna deploymentFeedback to microcontroller

NICHROME WIREGauges of Nichrome wireHeating response

TAPE MEASURE HOUSING TECHNIQUEMeasure housingRollers to reduce the friction

ELECTROMAGNETIC PLUNGER HOLDING METHOD

REQUIRED SPECIFICATION

Temperature rangeVibrationPower consumptionReliableLong life

PRE LAUNCHING TESTS FOR SATELLITES

ElectricalMechanicalThermal testVibration testThermal vacuum test

DRAWBACKSHigh costTime delay in responding

FUTURE

“ FEMTO-SATELLITE”

THANK YOU