RG223 is a commonly used coaxial cable, widely used in various RF and video transmission systems. This article will provide a detailed analysis of the conventional parameters of RG223 coaxial cable, including its physical characteristics, electrical performance, application areas, and selection methods, for reference only.
一, Physical characteristics
1. Structure
Central conductor: typically solid copper wire with a diameter of approximately 0.81 mm.
Insulation layer: usually made of polytetrafluoroethylene (PTFE) or polyethylene (PE), with a thickness of about 1.88 mm.
Shielding layer: usually a woven copper mesh with a weaving density of about 95%.
Outer sheath: usually made of polyvinyl chloride (PVC), with a thickness of approximately 1.02mm.
2. Size
Outer diameter: approximately 5.08 mm (0.200 inches).
Inner diameter: approximately 2.08 mm (0.082 inches).
3. Wire diameter
Central conductor: 22 AWG.
Shielding layer: woven copper mesh with a weaving density of about 95%.
二, Electrical performance
1. Characteristic impedance
50 ohms: The characteristic impedance of RG223 cable is 50 ohms, suitable for most RF and video transmission applications.
2. Attenuation
Low attenuation: RG223 cable has low attenuation in the high frequency range. For example, at 100 MHz, the attenuation is about 0.22 dB/m; At 1000 MHz, the attenuation is approximately 0.67 dB/m.
3. Insertion loss
Low insertion loss: The RG223 cable has low insertion loss, which helps maintain signal integrity and transmission efficiency.
4. Voltage Standing Wave Ratio (VSWR)
The voltage standing wave ratio of RG223 cable with low VSWR is usually less than 1.2:1, indicating its good matching performance.
5. Shielding effect
High shielding effect: The shielding layer of woven copper mesh provides good electromagnetic interference (EMI) and radio frequency interference (RFI) shielding effect.
三, Environmental adaptability
1. Temperature range
Wide temperature design: Some RG223 cables can typically operate normally within a temperature range of -40 ° C to 85 ° C and are suitable for various environmental conditions.
2. Protection level
High protection level: The outer sheath is usually made of PVC material, which has certain moisture-proof, dustproof, and wear-resistant properties.
3. Mechanical strength
Good mechanical strength: The shielding layer of the woven copper mesh and the sturdy outer sheath make the RG223 cable have good mechanical strength and suitable for use in various environments.
四, Selection method
1. Evaluate application requirements
Transmission distance: Choose the appropriate cable length based on the actual transmission distance of the application. RG223 cable is suitable for signal transmission over medium to short distances.
Frequency range: Select the appropriate cable based on the frequency range of the signal. The RG223 cable is suitable for the frequency range of 100 MHz to 1000 MHz.
Environmental conditions: Select appropriate cables based on factors such as temperature, humidity, and vibration in the installation environment. For example, choose high-temperature resistant cables for high temperature environments and waterproof cables for humid environments.
2. Choose the appropriate connector
RG223 cables typically use BNC and SMA connectors to ensure compatibility with the device. In applications that require higher frequency and greater power, N-type connectors can be chosen.
3. Check electrical performance
Impedance, attenuation, insertion loss, VSWR: Choose cables with excellent electrical performance to ensure the stability and reliability of signal transmission.
4. Consider environmental adaptability
Temperature range, protection level, mechanical strength: Select cables that can work stably in practical application environments.
