Radio Frequency (RF) is an abbreviation for Radio Frequency, which represents the electromagnetic frequency that can be radiated into space, with a frequency range of 300kHz to 300GHz. Radio frequency is radio frequency current, abbreviated as RF, which is a type of high-frequency alternating current electromagnetic wave. Alternating current that changes less than 1000 times per second is called low-frequency current, and current that changes more than 10000 times is called high-frequency current, and radio frequency is such a high-frequency current. Radio frequency (300K-300G) is a higher frequency band of high frequency (greater than 10K), while microwave frequency (300M-300G) is a higher frequency band of radio frequency. In electronics theory, when current flows through a conductor, a magnetic field is formed around the conductor; When alternating current passes through a conductor, alternating electromagnetic fields are formed around the conductor, known as electromagnetic waves. When the frequency of electromagnetic waves is below 100kHz, they will be absorbed by the surface and cannot form effective transmission. However, when the frequency of electromagnetic waves is above 100kHz, they can propagate in the air and be reflected by the ionosphere at the outer edge of the atmosphere, forming long-distance transmission capability. We refer to high-frequency electromagnetic waves with long-distance transmission capabilities as radio frequencies. Radio frequency technology is widely used in the field of wireless communication, and cable television systems use radio frequency transmission
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China