Home    Key and supplementary comparisons    Calibration and Measurement Capabilities - CMCs
The BIPM key comparison database
Refine your search
CMC AREA
CMCs General Physics (50)
PHYSICS >
Materials
Photometry
Impedance up to the MHz range
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: in coaxials (4)
Scalar RF attenuation and gain: in waveguides (4)
Signal and pulse characteristics: pulse amplitude (2)
Signal and pulse characteristics: pulse settling (2)
RF noise: noise temperature in waveguides (2)
Scattering parameters: reflection coefficient (Sii) in coaxials, real and imaginary (2)
HF power: calibration factor in coaxials (2)
Antenna properties: reflection coefficient (1)
RF characteristic impedance: electrical parameters (1)
CHEMICAL MATERIAL
monoelemental solution
GEOGRAPHIC LOCATION
EURAMET (50)
United Kingdom (50)
Result of the search
Your query 'United Kingdom' produced 50 results New search
1  2  3

 
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) in 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) in 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 antenna, 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 antenna, 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, preshoot and 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