NBS Technical NoteU.S. Government Printing Office, 1981 |
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Page 9
... diameters are 1.5 cm are mounted transversely across a perfectly conducting rectan- gular cylinder . The cylinder is placed in a TEM cell which acts approx- imately as a parallel plate waveguide . A vector voltmeter is used to measure ...
... diameters are 1.5 cm are mounted transversely across a perfectly conducting rectan- gular cylinder . The cylinder is placed in a TEM cell which acts approx- imately as a parallel plate waveguide . A vector voltmeter is used to measure ...
Page 12
... diameter 10 cm Receiver linewidth 10 nm Figure 5 shows the geometry . & is the range and a is the divergence of the transmitter . The size of the spot projected onto the diffuser is α D 020 l Figure 5. Geometry of laser beam.
... diameter 10 cm Receiver linewidth 10 nm Figure 5 shows the geometry . & is the range and a is the divergence of the transmitter . The size of the spot projected onto the diffuser is α D 020 l Figure 5. Geometry of laser beam.
Page 18
... diameter of the illuminated spot divided by the range . This is just equal to the divergence of the transmitter , or 0.5 mrad . We shall therefore require that the LED radiation be collimated and its divergence restricted to less than ...
... diameter of the illuminated spot divided by the range . This is just equal to the divergence of the transmitter , or 0.5 mrad . We shall therefore require that the LED radiation be collimated and its divergence restricted to less than ...
Page 19
... diameter is contacted to the chip . This optical system produces a virtual image of the emitter at very nearly the location of the emitter . The magnification of this optical system is about 1.8 ( see Appendix C ) ; the scan reveals a ...
... diameter is contacted to the chip . This optical system produces a virtual image of the emitter at very nearly the location of the emitter . The magnification of this optical system is about 1.8 ( see Appendix C ) ; the scan reveals a ...
Page 20
... diameter of the scatterer [ 2 ] . The speckle area is also equal to the coher- ence area in the observation plane . In our case , the far - field distance is hundreds of kilometers from the illuminated patch . However , the speckle size ...
... diameter of the scatterer [ 2 ] . The speckle area is also equal to the coher- ence area in the observation plane . In our case , the far - field distance is hundreds of kilometers from the illuminated patch . However , the speckle size ...
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Common terms and phrases
antenna attenuation Backscatter response backscatter signal backscatter signature beam beam divergence Bureau of Standards C3Hg calculated calibration capture fractions components coupling loss dBV/m densimeter DEPARTMENT OF COMMERCE detector diameter diode dipole electric field electronic engineering equation experimental far-field fault signature Federal field distortion due field intensity field strength Figure frequency function graded-index fiber Haynes Hiza IEEE Trans index fibers input instrument isotropic Laboratory laser laser diode leaky modes lens logarithmic Magnetic field distortion measurement metering unit methane microbending MIXTURE mode filter mole fraction N₂ National Bureau near-field numerical aperture optical fiber OTDR output parameters peak percent perfectly conducting cylinder potentiometer pulse radiation angle radiation monitor range Rayleigh scattering Report Resistor scan Science sensor step-index fiber switch Table Tech technical Technology temperature transverse electromagnetic cell U.S. DEPARTMENT voltage waveguide wavelength ZERO
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Page 99 - NONPERIODICALS Monographs — Major contributions to the technical literature on various subjects related to the Bureau's scientific and technical activities. Handbooks — Recommended codes of engineering and industrial practice (including safety codes) developed in cooperation with interested industries, professional organizations, and regulatory bodies.
Page 99 - DC 20056. Building Science Series — Disseminates technical information developed at the Bureau on building materials, components, systems, and whole structures. The series presents research results, test...
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Page 48 - ... public safety. The Bureau's technical work is performed by the National Measurement Laboratory, the National Engineering Laboratory, and the Institute for Computer Sciences and Technology. THE...
Page 45 - Mathematics Series — Mathematical tables, manuals, and studies of special interest to physicists, engineers, chemists, biologists, mathematicians, computer programmers, and others engaged in scientific and technical work. National Standard Reference Data Series — Provides quantitative data on the physical and chemical properties of materials, compiled from the world's literature and critically evaluated.