When we purchase coaxial cables, we will pay attention to one of the parameters of "phase velocity", what does this parameter refer to?
1. A simple definition of phase velocity
The phase of a wave refers to the position at a certain point in the wave's cycle in a given time. The phase propagation velocity of a wave is known as the phase velocity. It indicates the speed at which a specific point of constant phase, such as a crest or trough, travels in space. The phase velocity gives an idea of how the various points of the wave propagate.
2. Detailed explanation of phase velocity
Phase velocity refers to the speed at which the wave moves in phase as it propagates through space or within a wave packet.
Consider waves propagating in a medium or free space. Each point on the wavefront has a specific phase, i.e., the position of the wave relative to a given reference point. Phase velocity describes the speed at which these points move and moves along with the phase. It basically represents the speed at which the wave "looks" to propagate. In the diagram above, when considering a specific point on a wave, such as A, the phase velocity of its propagation is expressed in mathematical terms as "Vp=ω/k".
3. Application of phase velocity parameters
- 1 foot low loss N male to N right angle male cable assembly using Times Microwave LMR-195-FR model coaxial cable
The maximum frequency is 5.8Ghz, the bend radius is 2 inches, the shielding effect is > 90 dB, and the phase speed is 76%.
- 5 foot low loss SMA male to SMA male cable assembly using Times Microwave LMR-200-FR model coaxial cable
The maximum frequency is 5.8Ghz, the shielding effect is > 90 dB, the PE sheath, the low insertion loss, the bend radius is 2 inches, and the phase speed is 83%.