Common indicators of RF cable assemblies

Common indicators of RF cable assemblies

The RF coaxial cable assembly is to connect the RF coaxial cable and the RF connector together by crimping, welding, screwing, etc. Because different cables correspond to different applications and environments, many factors should be considered when selecting cable assemblies. Today, let's take a look at the common indicators of RF cable assemblies:

1) Characteristic impedance

The characteristic impedance refers to the ratio of the incident wave voltage and the incident wave current on the transmission line, or the negative value of the ratio of the reflected wave voltage and the reflected wave current, which is the most basic electrical characteristic of the coaxial cable.

2) Voltage Standing Wave Ratio (VSWR) and Return Loss (RL)

3) Loss (also known as attenuation) and mechanical stability

4) Transmission rate and delay

The transmission rate refers to the propagation speed of the signal in the cable and the speed of light.The ratio of C, which is inversely proportional to the square root of the dielectric constant of the insulating medium. The smaller the dielectric constant ε, the faster the propagation speed.

The delay refers to the time that the signal passes through the cable, which also depends on the dielectric constant of the insulating medium.ε, and the length L of the cable. The lower the dielectric constant ε, the shorter the signal propagation time.

5) Mechanical phase stability

The phase change caused by bending and jitter of the cable assembly is called mechanical phase stability, including bending phase stability (bending phase stability for short) and jitter phase stability (jitter phase stability for short). Among them, the bending phase stability index has a certain relationship with the bending method and the bending radius. When paying attention to this index, we must understand the test method and the size of the bending radius. When testing the bending phase stability index of cable assemblies, the industry usually uses a cable winding radius10 times the cable diameter of the cylinder 360 ° method test.

6) Temperature phase stability

7) Phase tracking

8) Shielding efficiency

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       Shenzhen Edelle Electronics Co., Ltd. specializes in the design and production of cable assemblies for many years. It has rich industry experience. The RF cluster cables designed and produced are safe and reliable, and are widely practical, and are well received by customers. If necessary, welcome to contact us.