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CMC AREA
CMCs General Physics (50)
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Properties of detectors and sources
Radio frequency measurements (50)
Antenna properties: antenna factor (15)
Signal and pulse characteristics: pulse time parameters: risetime (5)
Antenna properties: antenna gain (4)
Scalar RF attenuation and gain: on coaxials (4)
Scalar RF attenuation and gain: on waveguides (4)
Signal and pulse characteristics: pulse amplitude (2)
Scattering parameters: reflection coefficient (Sii) on coaxials, real and imaginary (2)
Signal and pulse characteristics: pulse settling (2)
HF power: calibration factor on coaxials (2)
RF noise: noise temperature in waveguides (2)
Scattering parameters: reflection coefficient (Sii) on waveguides, real and imaginary (1)
Scattering parameters: transmission coefficient (Sij) on coaxials, real and imaginary (1)
CHEMICAL ANALYTE
methane
GEOGRAPHIC LOCATION
EURAMET (50)
United Kingdom (50)
Result of the search
Your query 'United Kingdom' produced 50 results New search
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United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Electricity and Magnetism for United Kingdom (.PDF file)
Antenna properties: antenna factor. Linear dipole, high frequency biconical, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.7
Standard antenna method
Environment: horizontal above ground plane or free-space
Frequency: 500 MHz to 2000 MHz
Approved on 07 February 2019
Internal NMI service identifier: 449
 
Antenna properties: antenna factor. Horn antenna: reference value for unit: m-1, 0 dB to 63 dB
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.8
Three antenna method
Frequency range: 1 GHz to 40 GHz
Approved on 06 August 2013
Internal NMI service identifier: 560
 
Scattering parameters: transmission coefficient (Sij) on coaxials, real and imaginary. Passive device, two port device, -1 to 1
Absolute expanded uncertainty (k = 2.5, level of confidence 95 %): 0.00004 to 0.0010
Network analyser
Frequency range: 10 MHz to 67 GHz
Connector type: 7-16, GR900, GPC-7, Type-N, 3.5 mm, 2.92 mm, 2.4 mm, 1.85 mm
Impedance: 50
Uncertainty for low loss devices is dominated by repeatability and device performance. The value estimated here is based upon the repeatability of a through connection towards the low end of the frequency band. The coverage factors in the uncertainty tab
Internal NMI service identifier: 479
Uncertainty table
 
Scattering parameters: transmission coefficient (Sij) on waveguides real and imaginary. Passive device, two port device, -1 to 1
Absolute expanded uncertainty (k = 2.5, level of confidence 95 %): 0.000045 to 0.009
Network analyser
Frequency range: 8.2 GHz to 110 GHz
Waveguide designation: R100, R140, R220, R320, R400, R620, R900
Uncertainty for low loss devices is dominated by repeatability and device performance. The value estimated here is based upon the repeatability of a through connection towards the low end of the frequency band. The coverage factors in the uncertainty tab
Internal NMI service identifier: 489
Uncertainty table
 
Antenna properties: antenna factor. Biconical antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.5
Standard antenna method
Environment: free-space or defined height
Frequency: 20 MHz to 300 MHz
Approved on 06 August 2013
Internal NMI service identifier: 450
 
Antenna properties: antenna factor. Log antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
Three antenna method
Environment: defined height up to 2.5 m
Frequency: 80 MHz to 200 MHz
Approved on 06 August 2013
Internal NMI service identifier: 451
 
Antenna properties: antenna factor. Log antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.5
Three antenna method
Environment: free-space
Frequency: 200 MHz to 6000 MHz
Approved on 07 April 2016
Internal NMI service identifier: 452
 
Antenna properties: antenna factor. Bilog antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.7
Standard antenna method up to 200 MHz then three antenna method
Environment: free-space
Frequency: 20 MHz to 2000 MHz
Approved on 06 August 2013
Internal NMI service identifier: 453
 
Antenna properties: antenna factor. Log spiral antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
Three antenna method
Environment: free-space
Frequency: 100 MHz to 1000 MHz
Approved on 06 August 2013
Internal NMI service identifier: 454
 
Antenna properties: antenna factor. Horn antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
Three antenna method
Environment: free-space
Frequency: 200 MHz to 2000 MHz
Approved on 06 August 2013
Internal NMI service identifier: 455
 
Antenna properties: antenna factor. Rod antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
Calibrated monopole field in GTEM
Environment: plane-wave
Frequency: 100 Hz to 1 kHz
Restriction on antenna length: 41 inch
Approved on 06 August 2013
Internal NMI service identifier: 456
 
Antenna properties: antenna factor. Rod antenna, -30 dB(1/m) to 80 dB(1/m)
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
Standard antenna method and calibrated monopole field in GTEM
Environment: plane-wave
Frequency: 1 kHz to 100 MHz
Approved on 06 August 2013
Internal NMI service identifier: 457
 
Antenna properties: antenna gain. Horn antennas, 0 dB to 31 dB
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.04 to 0.1
3 antenna extrapolation technique
Frequency: 2.6 GHz to 110 GHz
Feed type: waveguide R32, R40, R48, R70, R84, R100, R120, R140, R220, R320, R400, R500, R620 or R900
Approved on 07 February 2019
Internal NMI service identifier: 458
Uncertainty table
 
Antenna properties: antenna gain. Horn antennas, 0 dB to 31 dB
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.05
3 antenna extrapolation technique
Frequency: 1.0 GHz to 40.0 GHz
Feed type: coaxial 50 GPC-7, type N, or GPC-3.5 mm, or 2.92 mm
Approved on 07 February 2019
Internal NMI service identifier: 469
Uncertainty table
 
Antenna properties: reflection coefficient. Antennas with coaxial inputs, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.05
Network analyser
Environment: antenna radiating in free-space
Frequency: 0.3 MHz to 6000 MHz
Approved on 06 August 2013
Internal NMI service identifier: 471
 
Signal and pulse characteristics: pulse amplitude aberrations (e.g. preshoot, overshoot). Pulse generator, 0 % to 20 %
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.1
Calibrated oscilloscope
Measurement bandwidth: 1 GHz to 50 GHz
Aberrations given as % of amplitude
Approved on 06 August 2013
Internal NMI service identifier: 472,2
 
Signal and pulse characteristics: pulse settling. Pulse generator, 0 % to 5 %
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.05
Calibrated oscilloscope
Settling time after transition: 1 ns to 10 ns
Given as % of amplitude
Approved on 06 August 2013
Internal NMI service identifier: 472,5
 
Signal and pulse characteristics: pulse settling. Pulse generator, 0 % to 2 %
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.05
Calibrated oscilloscope
Settling time after transition: > 10 ns
Given as % of amplitude
Approved on 06 August 2013
Internal NMI service identifier: 472,6
 
Signal and pulse characteristics: pulse time parameters: risetime. Pulse generator, 11 ps to 60 ps
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ps: 0.9
Calibrated oscilloscope
Approved on 06 August 2013
Internal NMI service identifier: 473
 
Signal and pulse characteristics: pulse time parameters: risetime. Pulse generator, risetime t, 60 ps to 10000 ps
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ps: (1.4 + 0.005t), t in ps
Calibrated oscilloscope
Approved on 06 August 2013
Internal NMI service identifier: 474