Antenna Calibration and Measurement Services


National Institute of Metrology (NIM) http://www.nim.ac.cn/


A-INFO and National Institute of Metrology (NIM) has established long-term partnership to provide antenna accredited & traceable calibration service.

Founded in 1955, NIM is China's national metrology institute and a state-level metrology institute. NIM is member of International Committee of Weights and Measures (CIPM), by signing Mutual recognition Agreement (MRA) w/ all member countries' organization, the Calibration and Measurement Certificates Issued by NIM gets full accredit and traceability.

NIM's quality management system meets the ISO/IEC 17025 requirement. Its Calibration and Measurement Capabilities (CMCs) that are peer reviewed both by China National Accreditation Service for Conformity Assessment (CNAS) and the Asia Pacific Metrology Program (APMP), published in the International Bureau of Weights and Measures (BIPM) Key Comparison Database (KCDB).

Member of International committee of Weight & Measurement – Electronic, Magnetism & RF

Sub No

Comparison identifier
Description
Field
Parameter(s)
Pilot
1
APMP.EM- K4
capacitors
Electricity and Magnetism, Capacitance

Capacitance: 10 pF
Frequency: 1592 Hz

Korea
KRISS
www.kriss.re.kr

2
APMP.EM- K4.1
capacitors
 
Electricity and Magnetism, Capacitance

Capacitance: 10 pF 

Frequency: 1592 Hz

Australia
NMIA
www.measurement.gov.au

3
APMP.EM- S1
capacitors
 
Electricity and Magnetism, Capacitance

Capacitance: 100 pF, 1 nF; 

Frequency: 1.592 kHz, 1 kHz

Korea
KRISS
www.kriss.re.kr

4
APMP.EM- S7
capacitors
 
Electricity and Magnetism, Capacitance
Capacitance: 100 pF;     Frequency: 1.592 kHz, 1 kHz

Australia
NMIA
www.measurement.gov.au

5
APMP.EM.BIPM- K11
DC voltage, Zener diode
Electricity and Magnetism, DC Voltage and Current
DC voltage: 1.018 V and 10 V

Singapore
SPRING Singapore
www.spring.gov.sg

6
BIPM.EM- K10.a
DC voltage, Josephson standards
Electricity and Magnetism, DC Voltage and Current
DC voltage: 1.018 V

International
BIPM
http://www.bipm.org/

7
CCEM- K1
resistance standards
 
Electricity and Magnetism, Resistance
Resistance: 1 ohm and 10 kilohms

International
BIPM
http://www.bipm.org/

8
CCEM- K10
Comparison of resistance standards
Electricity and Magnetism, Resistance
Resistance: 100 ohms

Germany
PTB
www.ptb.de

9
CCEM- K11
AC/DC voltage transfer difference at low voltages
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer

Voltage: 10 mV and 100 mV

Frequency: 1 kHz to 1 MHz

Sweden
SP
www.sp.se

10
CCEM- K2
Comparison of resistance standards
Electricity and Magnetism, Resistance
Resistance: 10 megohms and 1 gigaohms ;                           Voltage: 10 V, 50 V, 91 V or 100 V

US
NIST
www.nist.gov

11
CCEM- K3
Comparison of inductors
Electricity and Magnetism, Inductance

Inductance: 10 mH
Frequency: 1 kHz

Germany
PTB
www.ptb.de

12
CCEM- K4
Comparison of capacitors
 
Electricity and Magnetism, Capacitance

Capacitance, 10 pF
Frequency: 1592 Hz

US
NIST
www.nist.gov

13
CCEM- K5
AC power at 50/60 Hz
 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Power factor: 1.0, 0.5 Lead, 0.5 Lag, 0.0 Lead, 0.0 Lag

US
NIST
www.nist.gov

14
CCEM- K6.a
Comparison of AC/DC voltage transfer standards
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Voltage: 3 V                     Frequency: 1 kHz, 20 kHz, 100 kHz and 1 MHz

Germany
PTB
www.ptb.de

15
CCEM- K6.b
Comparison of AC/DC voltage transfer standards
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer

Voltage: 500 V to 1000 V

Frequency: 50 kHz to 100 kHz

France
BNM-LNE
www.lne.fr

16
CCEM- K7
AC voltage ratio
 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Frequency: 1 kHz

UK
NPL
www.npl.co.uk

17
CCEM- K8
Comparison of DC voltage ratios
 
Electricity and Magnetism, DC Voltage and Current
Ratio: 1000 V / 10 V and 100 V / 10 V

Italy
IEN
www.ien.it

18
CCEM- K9
Comparison of high voltage AC/DC converters
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer

Voltage: 1000 V, 500 V and 200 V

Frequency: 1 kHz, 10 kHz, 20 kHz, 50 kHz and 100 kHz

France
BNM-LNE
www.lne.fr

19
CCEM.M- K1
Comparison of low frequency magnetic flux density
 
Electricity and Magnetism, Magnetism
Frequency: DC to 20 kHz

Germany
PTB
www.ptb.de

20
APMP.EM- K10
Resistance standards
Electricity and Magnetism, Resistance
Resistance: 100 ohms

China
NIM
www.nim.ac.cn

21
APMP.EM- K8
DC voltage ratios
Electricity and Magnetism, DC Voltage and Current
Ratio: 1000 V / 10 V and 100 V / 10 V

China
NIM
www.nim.ac.cn

22
APMP.EM- K2
Resistance standards
Electricity and Magnetism, Resistance
Resistance: 10 megohms and 1 gigaohms

Korea
KRISS
http://www.kriss.re.kr/

23
EURAMET.EM- S36
Calibration of high voltage partial discharge measurement systems
Electricity and Magnetism, High voltage and current
-

Sweden
SP
www.sp.se

24
APMP.EM- S14
Earth-level DC magnetic flux density
Electricity and Magnetism, Magnetism
-

Vietnam
VNIM
vmi.gov.vn

25
CCEM.RF- K13.CL
Voltage measurements
Electricity and Magnetism, Radio frequencies

Voltage:1mV
Frequency: 30 MHz

Germany
PTB
www.ptb.de

26
 
CCEM.RF- K15.CL
Attenuation measurements
 
Electricity and Magnetism, Radio frequencies
Frequency: 30 MHz

Germany
PTB
www.ptb.de

27
CCEM.RF- K16.CL
Measurement of reflection coefficient
Electricity and Magnetism, Radio frequencies
Frequency: 500 MHz, 3 GHz and 7 GHz

Germany
PTB
www.ptb.de

28
CCEM.RF- K19.CL
Attenuation in a 50 ohm coaxial line
Electricity and Magnetism, Radio frequencies
Frequency: 60 MHz and 5 GHz

UK
NPL
www.npl.co.uk

29
CCEM.RF- K2.W
Noise power in waveguide
Electricity and Magnetism, Radio frequencies
Frequency: 9 GHz, 10.5 GHz and 11.2 GHz

UK
NPL
www.npl.co.uk

30
CCEM.RF- K20
Measurements of electric field strength
Electricity and Magnetism, Radio frequencies
Frequency: 10 MHz to 1 GHz (13 discrete values among which four were selected for the K: 30 MHz, 100 MHz, 300 MHz, and 900 MHz)

Switzerland
METAS
www.metas.ch

31
CCEM.RF- K21.F
Comparison of antenna factors
Electricity and Magnetism, Radio frequencies
Frequency: 300 MHz and 900 MHz

UK
NPL
www.npl.co.uk

32
CCEM.RF- K23.F
Antenna gain
Electricity and Magnetism, Radio frequencies
Frequencies: 12.4 GHz, 15 GHz and 18 GHz

US
NIST
www.nist.gov

33
CCEM.RF- K24.F
Correction factor for E-field measurements
Electricity and Magnetism, Radio frequencies
Frequencies: 1 GHz, 2.45 GHz, 10 GHz and 18 GHz     Indicated field levels: 10 V/m, 30 V/m and 100 V/m

UK
NPL
www.npl.co.uk

34
CCEM.RF- K4.CL
Voltage measurements
Electricity and Magnetism, Radio frequencies
Voltage: 1 V  ;  Frequency: 1 MHz to 300 MHz, 1 GHz (option)

US
NIST
www.nist.gov

35
CCEM.RF- K5.b.CL
Reflection coefficient / S parameters in type N connectors
 
Electricity and Magnetism, Radio frequencies
Frequency: 2 GHz to 18 GHz

UK
NPL
www.npl.co.uk

36
CCEM.RF- K5.c.CL
Reflection coefficient / S parameters in PC-3.5
Electricity and Magnetism, Radio frequencies
Frequency: 50 MHz to 33 GHz

Japan
NMIJ
www.nmij.jp

37
CCEM.RF- K8.CL
Power in 50 ohm coaxial lines
 
Electricity and Magnetism, Radio frequencies

Calibration factor of type-N and type-PC7 thermistor mounts

Frequency: 10 MHz, 50 MHz, 1 GHz, 4 GHz, 8 GHz, 12 GHz, 15 GHz, and 18 GHz

Nederland
NMI-VSL
www.vsl.nl

38
CCEM.RF- K25.W
RF power from 33 GHz to 50 GHz in waveguide
Electricity and Magnetism, Radio frequencies
18 frequencies from 33 GHz to 50 GHz in the R400 waveguide band

Germany
PTB
www.ptb.de

39
APMP.EM.RF- K19.CL
Attenuation in a 50 ohm coaxial line
Electricity and Magnetism, Radio frequencies
Frequency: 60 MHz and 5 GHz 

China
NIM
www.nim.ac.cn

40
 
APMP.EM.RF- K8.CL
Power in 50 ohm coaxial lines
Electricity and Magnetism, Radio frequencies
Frequency: 10 MHz, 50 MHz, 1 GHz, 4 GHz, 8 GHz, 12 GHz, 15 GHz, and 18 GHz

Japan
NMIJ
www.nmij.jp

41
APMP.EM-K5.1
AC power at 50 Hz/60 Hz
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Power factor: 1.0, 0.5 Lead, 0.5 Lag, 0.0 Lead, 0.0 Lag

China
NIM
www.nim.ac.cn

The evaluation and expression of uncertainty of the calibration results are in line with the requirements of JJF1059 series standards.

 


Antenna Metrology System:



International Comparison: Top-level in the world


Standard Gain Horn Antenna Uncertainty Comparison

Country

NMIs

Chamber Size(m)

Frequency (GHz )

Uncertainty (dB)

China

NIM

15.1x7.6 x 7.75

2 - 110

0.04 - 0.1

UK

NPL

15 x7.5 x 7.5

2 - 110

0.04-0.08

Russia

VNIIFTRI

10 × 5 ×4

16.7 - 118

0.15-0.25

USA

NIST

-

2 - 110

0.07-0.1

 

 

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