asteroza + antenna   124

Low-Cost SmallSats to Explore to Our Solar System's Boundaries | NASA
bubble enclosed cubesat deep space explorers, using metalicized sphere surfaces as the primary antenna reflector
cubesat  space  research  technology  sphere  membrane  flector  antenna 
april 2019 by asteroza
possible OneSpace phased array ground terminal antenna maker, a side project/startup by Greg Wyler
flat  panel  phased  array  VSAT  grount  terminal  antenna  telecommunications  satellite  communications  newspace 
march 2019 by asteroza
Capella Space
Trying to build a SAR constellation using 3U cubesats. Interesting SAR antenna design... Which MMA is suing them over since MMA makes similar and MMA's CTO suddenly jumped to this startup after Capella having done an exploratory business arrangement with MMA which was cut off just before he left...
cubesat  SAR  radar  constellation  newspace  space  research  technology  folding  compact  deployable  antenna 
september 2018 by asteroza
ALCAN Systems : Communication is the key
phased array satellite broadband antenna, similar to kymeta (including using LCD production lines for manufacturing)
phased  array  antenna  satellite  telecommunications  hardware  electronics  devices 
may 2018 by asteroza
Interesting deployable antenna reflector using a shape memory polymer for the reflector ribs (so sorta looks like a clam shell), and an active focus subreflector to correct and beam steer.
newspace  deployable  antenna  reflector  space  cubesat  collapsible  folding  shape  memory  polymer 
march 2018 by asteroza
Engineers Discover How To Make Antennas For Wireless Communication 100x Smaller Than Their Current Size - Slashdot
Interesting comment about a low gain/low noise design that is nearly solid state. Simple integrated LED laser and photodiode could be the pickup.
antenna  design  RF  low  noise 
august 2017 by asteroza
Breaking Lorentz reciprocity to overcome the time-bandwidth limit in physics and engineering | Science
Telecomms just got a huge breakthrough. But apparently radar guys in the 40's knew about using non-reciprocal resonators to keep EM from pushing back into waveform generators, but never published?
asymmetric  nonreciprocal  high  bandwidth  resonant  waveguide  RF  radio  physics  materials  science  engineering  research  technology  telecommunications  telecomms  antenna 
june 2017 by asteroza
Underwater Radio, Anyone?
Using a something like a solenoid to create the mechanical equivalent to a very large VLF/ULF antenna for water/ground penetrating comms
DARPA  ULF  VLF  mechanical  antenna  RF  research  technology  portable  transmitter  Delicious 
december 2016 by asteroza
Echodyne | Metamaterials-Based Radar Technology
Using metamaterials, they've built up sub-half wavelength antenna arrays for a phased array radar at small scale, with spacing so small that they don't need expensive/heavy/powerful phase shifters to beam steer.
small  form  factor  metamaterial  antenna  phased  array  radar  UAV  drone  sense  avoid  hardware  electronics  devices  RF  beam  steering  Delicious 
november 2016 by asteroza
Kepler Communications |
Trying to build an orbital backbone for smallsats, to gather comms to larger high bandwidth birds. Sounds like MIMO phased array antennas?
satellite  constellation  orbital  space  communications  backbone  infrastructure  smallsat  network  MIMO  antenna  phased  array  RF  link  Delicious 
july 2016 by asteroza
Sofant Technologies | Smart Antenna and RF MEMS Solutions
Hrm, steerable antenna they say, MEMS switches they say. So not a phased array antenna, but rather, switching between different "antennas" by changing which traces in an antenna are active?
antenna  technology  RF  smart  steerable  MEMS  Delicious 
may 2016 by asteroza
PharosAntenna – the world’s first smart antenna
Uses ground station and/or UAV FCS to provide directional awareness for a semidirectional antenna, providing longer range at reasonable weight. If you equip the antenna pair with MUXing digital modems, you can do long range video and MAVlink telemetry, which compensates for ground station movement (assuming mobile GCS)
5.8GHz  directional  antenna  pair  hardware  electronics  devices  UAV  drone  FPV  telemetry  video  link  RF  Delicious 
may 2016 by asteroza
MITSUBISHI ELECTRIC News Releases Mitsubishi Electric's SeaAerial Antenna Uses Seawater Plume
Hrm, so if you disguise your USV as a whale blowing spray to radio out, it might be unnoticed as a USV...
seawater  jet  plume  fountain  virtual  radio  RF  aerial  antenna  research  technology  Delicious 
january 2016 by asteroza
Working on centimeter scale GPS augmentation through novel antenna design plus software postprocessing. Working with Samsung for cellphone applications.
CDGNSS  GNSS  GPS  antenna  hardware  software  research  Delicious 
may 2015 by asteroza
Optical antenna enhanced spontaneous emission
Making microdipoles sandwiching a micro LED means more control and can make them strong enough to compete with regular lasers.
microantenna  dipole  optical  antenna  LED  pyhsics  optics  RF  radio  materials  science  research  technology  Delicious 
february 2015 by asteroza
SMAP: Specifications
Interesting that the deployable mesh antenna rotates about it's yoke continuously to create a weird spirograph-like mapping pattern.
NASA  JPL  SMAP  deployable  mesh  antenna  SAR  rotating  yoke  control  Delicious 
february 2015 by asteroza
goTenna | No service, no problem.
Uses a low power FM radio as a long-ish range outdoor mesh network repeater/range extender thingy to connect smartphones in the wilderness. Only does voice and text messaging though, but considering the underlying bandwidth that's pretty good.
offline  outdoor  offgrid  communications  wireless  bridge  smartphone  accessories  hardware  electronics  devices  radio  FM  survival  gear  camping  antenna  range  extender  bluetooth  Delicious 
january 2015 by asteroza
Kymeta | Connected. Anywhere.
Using digitally switched resonators and a metamaterial surface, you gain the abilities of phased array without all the associated phased array parts, and solid state to boot.
satellite  technology  surface  RF  hardware  directional  subwavelength  communication  metamaterial  state  space  research  transmission  antenna  solid  forming  steering  active  beam  resonator  devices  electronics  Delicious 
august 2013 by asteroza
UConn Professor’s Patented Technique Key to New Solar Power Technology | UConn Today
Optical rectennas still need terahertz switching gear to be practical, but this is a good step toward advanced solar power using more wavelengths.
optical  rectenna  technology  selective  nanorectenna  layer  fabrication  solar  research  antenna  production  atomic  science  area  materials  deposition  generator  power  nanotechnology  Delicious 
february 2013 by asteroza
NASA - OCCAMS: Optically Controlled and Corrected Active Meta-material Space Structures
Wow, using photonic muscles embedded in a deployable thin film mirror, using a raster scanning laser to tweak the mirror as an active optical correction primary aperture mirror by using the muscles to deform the mirror. But, the concept suspiciously looks similar to a stealth radar deflection cone for spysats patented by Teledyne Ryan and allegedly used on Misty 1/2 and NROL-15.
NASA  deployable  mirror  space  infrastructure  antenna  research  optics  deformable  LCE  liquid  crystal  elastomer  polymer  substrate  photonic  artificial  muscle  actuator  active  metamaterial  photo-initiated  distortion  photoactive  optically  addressable  laser  molecular  neoteric  lightweight  large  form  factor  aperture  primary  telescope  thin  film  inflatable  materials  science  technology  nanotechnology  nanoactuator  nanomuscle  Delicious 
september 2012 by asteroza
NASA - SpiderFab: Process for On-Orbit Construction of Kilometer-Scale Apertures
Interesting use of a 3D printer in space, but they talk abut antennas. So probably not able to do mirrors yet. Also claim radiators, which would be a neat trick.
NASA  SpiderFab  orbital  factory  3D  printer  large  gossamer  space  strucuture  manufacturing  research  deployable  antenna  radiator  reflector  arpeture  construction  infrastructure  Delicious 
september 2012 by asteroza
SpaceGroundAmalgam, LLC
Won a NewSpace business plan competition for developing large diameter inflatable satellite reflector antennas.
space  inflatable  antenna  reflector  materials  science  research  technology  communications  Delicious 
august 2012 by asteroza
Encoding many channels on the same frequency through radio vorticity: first experimental test
New trick of adding vortex twist rather than traditional polarization to a signal to boost encoding for a single frequency. The requirement for what appears to be a directional helicoidal parabolic antenna ( does this mean the antenna needs to be a few wavelengths in depth?) means no love for mobile omnidirectional antennas though.
radio  vorticity  vortex  twisted  transmission  helical  OAM  SAM  polarization  encoding  helicoidal  parabolic  antenna  physics  EM  EMF  research  Delicious 
march 2012 by asteroza
Satellite Reception Underway – Technische Universität Darmstadt
Cost is somewhat high, but this may be amenable to roll-to-roll manufacturing, which would allow you to make monster sized solid state phased array antennas.
LCD  phased  array  antenna  materials  science  radio  research  germany  solid  state  Delicious 
february 2012 by asteroza
Spray On Kit
Apparently this is the real deal, a nanoparticle/nanocapacitor suspension paint. A spray on paint kit to create either a conformal antenna or to enhance an existing antenna. They painted a tree and were able to send VHF signals 14 miles. Boosting existing antennas is anywhere from 10% to 40% (40% was 20dBm for an iPhone 3 test). The videos also talk about potential uses in other EMF applications, such as (?AC) electric motor windings.
surface  aftermarket  spray  coating  antenna  booster  paint  conformal  military  communications  technology  iPhone  kit  nanoparticle  particle  suspension  colloid  capacitor  nanocapacitor  materials  science  research  nanotechnology  Delicious 
february 2012 by asteroza
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