asteroza + rf   141

Swissto12 - home
Looks like 3D printing feed horn distributors?
3D  printing  fabbing  RF  feed  horn  distributor  radio  SDR  smallsat  newspace  space  satellite  parts 
17 days ago by asteroza
DroneGun MKIII | DroneShield
Someone liked that PsychoPass Dominator design a little too much...
UAV  drone  defense  RF  jammer 
8 weeks ago by asteroza
Radio frequency transmitter based on a laser frequency comb | PNAS
Using resonating laser comb fingers to make encoded microwave signals
laser  radio  RF  electronic-photonic  transmitter  frequency  comb 
may 2019 by asteroza
Electric Sky
Some sort of wizardry allows new highly spare arrays for RF power beaming, for medium ranges (looking at 1000km or less), which causes beam refocusing. All solid state, looking at 915MHz UHF.
external  power  beaming  wireless  transmission  transfer  space  propulsion  RF  UHF  whisper  refocus  sparse  array 
april 2019 by asteroza
Overview ‹ Wireless Communication from Underwater to the Air — MIT Media Lab
Using HF radar to read ocean surface disturbances caused by high power sonar rippling the ocean surface. Currently only works in 6 inch wave conditions...
ocean  air  interface  one  way  communication  wireless  translational  acoustic  RF  military 
august 2018 by asteroza
Product — Heat food, anywhere.
One example of the new solid state RF amplifier microwave ovens, in a portable camping format.
portable  small  compact  form  factor  camping  LDMOS  solid  state  RF  amplifier  microwave  oven  cooking  hardware  electronics  devices 
september 2017 by asteroza
Taking Back Control: Next-Generation Cooking with Solid-State RF Energy [Speaker's Corner] - IEEE Journals & Magazine
Solid state microwave emitters with closed loop feedback could make superior microwave ovens. Offshoot of phased array radar work? Plus potentially more compact and efficient, leading to portable microwave ovens...
solid  state  ceramic  semiconductor  LDMOS  RF  microwave  amplifier  closed  loop  feedback  cooking  oven  kitchen  hardware  electronics  devices 
september 2017 by asteroza
Home - Wi SUN Alliance
SUN (Smart utility/ubiquitous network) and FAN (Field Area Network), seems to be now an IETF thing, built on top of 802.15.4 Zigbee meshes to build up things like smartgrid/HEMS demand metering and surveillance meshes
Wi-SUN  FAN  IETF  802.15.4  Zigbee  mesh  RF  wireless  network  standard  ubiquitous  networking  utility  SCADA  smartgrid  metering  surveillance 
september 2017 by asteroza
Optical detection of radio waves through a nanomechanical transducer : Nature : Nature Research
Use a membrane as part of a resonant capacitor circuit to receive a specific frequency, detect activity by laser sensing membrane movement.
nanomechanical  transducer  capacitor  laser  RF  receiver  low  noise  optoelectromechanical  sensor  membrane 
september 2017 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
Technology - Akash Systems
Using CVD diamond substrates to better extract heat from GaN RF amplifiers to improve performance, as an alternative to GaN-SiC.
diamond  substrate  GaN  RF  power  amplifier  hardware  electronics  devices  space  technology  research  CVD 
july 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
Tactical Undersea Network Architectures (TUNA)
RF relay buoys using a self-deploying wave energy power generator, and short term fiber optic submarine cables (30 days) which are very lightweight
RF  wireless  relay  communication  network  buoy  wave  energy  power  generator  military  temporary  Delicious 
january 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
Jeeva Wireless
Using modulated passive reflection of ambient signal to achieve low power but reasonable wifi speed.
passive  low  power  wifi  RF  signal  reflection  modulation  wireless  research  technology  Delicious 
december 2016 by asteroza
Titus II - Titus SDR Receiver
Interesting... android tablet prefitted with a wideband SDR and the rough tools to use it as an awesome multiband receiver
android  tablet  wideband  SDR  radio  receiver  hardware  electronics  devices  research  ditigal  analog  MW  SW  FM  AM  RF  tuner  transceiver  Delicious 
november 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
Surprises of the Faraday Cage
Surprise, faraday cages don't work like we thought they did.
faraday  cage  physics  electronics  research  technology  electric  RF  field  Delicious 
september 2016 by asteroza
MegaMimo :: NETMIT Networks @ MIT
Similar to datacenter basebands for cellular networks, turning the all towers/AP's into part of a giant phased array.
beamforming  wifi  wireless  signal  RF  MIMO  network  networking  research  MIT  Delicious 
august 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
Introducing OpenCellular: An open source wireless access platform | Engineering ...
Split radio/baseband concept, though I wonder if this can work up to datacenter baseband style network systems?
facebook  OpenCellular  opensource  RF  baseband  cellular  basestation  hardware  design  specification  standard  electronics  devices  Delicious 
july 2016 by asteroza
Supply Inc. Wireless Power
Nothing about how it does this, other than non-inductive.
wireless  charging  charger  recharging  recharger  electronics  devices  RF  hardware  Delicious 
july 2016 by asteroza
Vayyar | Imaging at Your Fingertips
Some sort of ground penetrating radar type sensor on a chip? probably not terahertz imaging...
RF  imaging  sensor  density  Delicious 
june 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
Terahertz-driven linear electron acceleration : Nature Communications : Nature Publishing Group
Interesting new take on linear accelerators, possible x100 improvement leading to free electron x-ray lasers...
terahertz  RF  wave  linear  particle  electron  accelerator  physics  research  technology  hardware  electronics  devices  Delicious 
october 2015 by asteroza
[1505.06815] Powering the Next Billion Devices with Wi-Fi
So apparently you can now power surveillance cameras using radiant wifi signals. A wireless version of PoE cameras then?
RF  energy  harvesting  scavenging  recovering  wifi  wireless  power  generator  PoWi-Fi  research  technology  IoT  internet-of-things  Delicious 
june 2015 by asteroza
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