|
|
Efficient Switching Arrangement for ( N + 1)/ N Redundancy
hot!
|
|
Date added: 10/01/2007 |
|
A reliable system that requires 4 amplified outputs for proper functioning incorporates a fifth spare amplifier that can be used if one of the original 4 fails. The system presented here requires a minimum number of switches, and provides the further benefit of allowing testing of all 5 amplifiers and 4 switches without requiring additional hardware. |
|
|
|
|
|
|
Inexpensive Clock for Displaying Planetary or Sidereal Time
hot!
|
|
Date added: 10/01/2007 |
|
A standard quartz movement wall clock is modified to drive the movement from an external frequency source rather than the internal quartz crystal oscillator. The frequency can be adjusted to run at any desired speed. |
|
|
|
|
|
|
Lightweight Reflectarray Antenna for 7.115 and 32 GHz
hot!
|
|
Date added: 10/01/2007 |
|
Inflatable reflectarrays offer the potential for light and easily stowed antennas, but suffer from being narrow band. A single reflectarray could not be made to work at both X and Ka bands. Our developed dual band inflatable reflectarray would alleviate this problem while maintaining its low-mass characteristic. |
|
|
|
|
|
|
|
|
|
Hilbert-Curve Fractal Antenna With Radiation-Pattern Diversity
hot!
|
|
Date added: 10/01/2007 |
|
A novel miniaturized printed folded Hilbert Curve Fractal Antenna is presented with radiation pattern diversity. Miniaturized antennas are being developed by NASA for surface wireless local area networks for robotic and human exploration missions on the moon and Mars. |
|
|
|
|
|
|
Laser Range and Bearing Finder With No Moving Parts
hot!
|
|
Date added: 09/01/2007 |
|
This innovation describes a laser range finder-based sensor with a wide field-of-view and no moving parts. The sensor is capable of measuring the range, azimuth, and elevation (range and bearing) to a target. |
|
|
|
|
|
|
MCM Polarimetric Radiometers for Planar Arrays
hot!
|
|
Date added: 09/01/2007 |
|
We have developed a planar radiometer that is capable of detecting the polarization of the electromagnetic radiation (polarimeter). We were able to integrate the polarimeter in a single multichip reducing the cost per polarimeter in a large array. |
|
|
|
|
|
|
Focal-Plane Arrays of Quantum-Dot Infrared Photodetectors
hot!
|
|
Date added: 09/01/2007 |
|
These infrared photodetectors can run at higher operating temperatures. |
|
|
|
|
|
|
Two-Band, Low-Loss Microwave Window
hot!
|
|
Date added: 09/01/2007 |
|
This report describes a low-cost, high performance microwave window for a low-noise, cryogenically cooled microwave feed system. |
|
|
|
|
|
|
Cathodoluminescent Source of Intense White Light
hot!
|
|
Date added: 09/01/2007 |
|
The device described herein generates broad spectrum electromagnetic radiation in the visible. The
device is novel in that it generates broad spectrum radiation that makes it applicable to commercial
lighting applications or for spectroscopy applications. |
|
|
|
