RF Coaxial Cable Assembly Reference Specification

RF Coaxial Cable Assembly Reference Specification

The excellent performance of RF coaxial cable components is mainly reflected in stability, reliability, and good stability, low loss and low standing wave ratio.8Big factors.

1.Characteristic impedance:by the outer diameter of the inner conductor of the RF coaxial cable(d)Inner diameter of shielding layer(D)and insulation layer(The dielectric constant of the medium) determines the characteristic impedance of the cable.Zo(Ω)= ( 138 / √εr ) x ( log D/d ). If the impedance is perfectly matched, the loss of the cable is only the attenuation of the transmission line, and there is no reflection loss.

2.standing wave ratio(VSWR): The impedance change of the RF cable will cause the reflection of the signal, and the size of the reflection can be used as the voltage standing wave ratio.(VSWR)to express, that is, the ratio of incident and reflected voltage.VSWRThe smaller the return loss, the greater the reflection of the cable is small, and the accuracy of impedance control is high.

3.Attenuation(Insertion loss)：Indicates the cable's effective ability to transmit RF signals, mainly including dielectric loss, conductor loss and radiation loss, in general, the larger the conductor size, the smaller the loss (LD-PTFE) The medium-filled cable is relatively solid PTFE (PTFE) media-filled cables have lower media loss.

4. Power capacity:Refers to the cable's ability to consume thermal energy generated by conductor losses and dielectric losses, as well as the maximum power that can be transmitted without voltage breakdown.

5.Phase stability in bending:With low density PTFE (LD-PTFE) The phase stability of the medium-filled cable will be significantly better than that of solid PTFE (PTFE) For dielectric-filled cables, the phase stability of cables with multiple inner conductors is better than that of cables with single inner conductors.

6.Frequency range:Cable manufacturers recommend the use of frequency range, the same structure of the cable, the smaller the size of the wider the use of frequency range.

7. Shielding efficiency:Cable RF leakage at specific frequenciesdBvalue, which is determined by the outer conductor (shield) structure of the cable.

8.Mechanical performance indicators:Mainly has the minimum bending radius and unit mass decision, the former is the RF coaxial cable in use to allow the minimum radius of bending value, excessive bending will cause cable damage, resulting in cable performance degradation.

Shenzhen Aide Electronics Co., Ltd. has been engaged in the production of RF cable components for many years and has rich industry experience. The products are widely used in automobiles, communications, ships and other fields.