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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
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This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under jurisdiction of the National Technical Committee on Communication of Standardization Administration of China (SAC/TC 485).
RF technical requirements and test methods for 76GHz vehicle radio equipment
1 Scope
This standard specifies the RF technical requirements and test methods for equivalent isotropic radiated power, spurious emission of transmitter, spurious emission and out-of-band emission of receiver and the like of vehicle radio equipment working in the frequency band of 76GHz.
It is applicable to vehicle radio equipment working in the frequency range of 76GHz~77GHz.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 9254-2008 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
equivalent isotropic radiated power; EIRP
product of the power input to antenna and the antenna gain relative to isotropic antenna along the assigned direction
3.1.2
spectral power density
average equivalent isotropic radiated power within the unit bandwidth
3.1.3
duty cycle
ratio of the duration of a positive pulse to the total period of the pulse in a series of pulses
3.1.4
spurious emission
unwanted emission of the equipment in spurious domain
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
RBW: Resolution Bandwidth
RMS: Root Mean Square
VBW: Video Bandwidth
4 Technical requirements
4.1 Environmental requirements
The equipment manufacturer shall declare the operating environmental conditions of the equipment in advance, and the equipment shall operate in its nominal operating environment.
4.2 RF technical requirements
4.2.1 Peak equivalent isotropic radiated power
4.2.1.1 General
The product of the peak power input to antenna and the antenna gain relative to isotropic antenna along the assigned direction.
4.2.1.2 Limit
The limit of peak equivalent isotropic radiated power is 55dBm when the transmitter operates at the maximum power level.
4.2.2 Frequency range
The limit of applied frequency range is 76GHz to 77GHz when the transmitter operates at the maximum power level.
4.2.3 Out-of-band emission
4.2.3.1 General
In this standard, out-of-band emission refers specifically to the maximum spectral power density of the transmitter in the frequency ranges of 73.5GHz to 76GHz and 77GHz~79.5GHz.
4.2.3.2 Limit
The out-of-band emission limit is 0dBm/MHz.
4.2.4 Spurious emission of transmitter
4.2.4.1 General
Spurious emission of transmitter is the unwanted emission of the equipment in spurious domain when the equipment is in emission state.
4.2.4.2 Limit
See Table 1 for spurious emission limit of transmitter.
Table 1 Spurious emission limit of transmitter
Frequency range Emission state limit
dBm Standby or idle state of transmitter
dBm Test bandwidth
Note: f indicates the spurious frequency of the transmitter.
4.2.5 Spurious emission of receiver
4.2.5.1 General
Spurious emission of receiver is the unwanted emission of the equipment in spurious domain when the equipment is in receiving state.
4.2.5.2 Limit
See Table 2 for spurious limit of receiver.
Table 2 Spurious emission limit of receiver
Frequency range Limit
dBm Test bandwidth
30MHz≤ f≤ 1GHz -57 100kHz
f>1GHz -47 1MHz
Note: f indicates the spurious frequency of the transmitter.
5 Test method
5.1 Environmental conditions needed for test
Equipment under test shall operate under its normal operating environment.
a) temperature: 15℃~35℃;
b) relative humidity: 20%~75%.
5.2 Test results and their uncertainty
The complete expression of test results shall consist of the following parts:
a) measured values and corresponding limits;
b) measurement uncertainty.
The measurement uncertainty shall not be greater than the value in Table 3.
Foreword i
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
3.2 Abbreviations
4 Technical requirements
4.1 Environmental requirements
4.2 RF technical requirements
5 Test method
5.1 Environmental conditions needed for test
5.2 Test results and their uncertainty
5.3 Test configuration
5.4 Peak equivalent isotropic radiated power
5.5 Frequency range
5.6 Out-of-band emission
5.7 Occupied bandwidth
5.8 Spurious emission of transmitter
5.9 Spurious emissions of receiver
Annex A (Normative) Test site for radiation test
Annex B (Normative) General test method for radiated spurious emission
Bibliography
