SPP Fields Antenna 3 rd Axis Design Concept. Paul Turin SSL UCB 9/20/12. Antenna Concept. Add third E-field axis by extending 1m Stacer boom from end of magnetometer boom Small Stacer would be light weight, compact, have simple mechanical and electrical interfaces
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SPP Fields Antenna3rd AxisDesign Concept Paul Turin SSL UCB 9/20/12
Antenna Concept • Add third E-field axis by extending 1m Stacer boom from end of magnetometer boom • Small Stacer would be light weight, compact, have simple mechanical and electrical interfaces • Deployed by FR04 Frangibolt • Non-magnetic, low-permeability materials • Length controlled by Dacron lanyard • High-heritage design – over 600 Stacers successfully flown, 13 of very similar design
Antenna Stowed SCM at end of mag boom Mag boom SCM/Stacer mount 3rd Axis antenna
Antenna Deployed This Stacer design can accommodate any length up to 2m 1m stroke
Antenna Detail MDM connector Insulating preamp housing/base Conductive housing connected to Stacer Mass 85g Lanyard stowage Coiled Stacer Ta shield Frangibolt stud Tip piece Preamplifier Preamplifier contact spring Frangibolt
1m Antenna In Umbra on 4m Mag Boom 23mm umbra clearance 1m just fits!
TiNi Aerospace FR04 Frangibolt • 7 grams • Compact • 15W for 20s • Many hundreds flown