What is the cause of insertion loss?
Excessive insertion loss can also be caused by poorly terminated connectors / plugs. A poor connection can add significant insertion loss. However, impurities in the copper cable can also cause insertion loss failures; again this typically happens on one pair only.
Insertion loss, also referred to as attenuation, refers to the loss of signal strength at the far end of a line compared to the signal that was introduced into the line. Insertion loss is usually expressed in decibels dB with a minus sign. Insertion loss increases with distance and frequency.
- To avoid confusing the lay person, we prefer the term 'Attenuator' to 'Silencer' because they reduce (attenuate) the level of sound rather than removing it completely. Attenuators work in three very different ways to attenuate sound: Reactive – using resonance to absorb the sound energy.
- When constructing a vehicle which includes soundproofing, a panel damping material is fitted which reduces the vibration of the vehicles body panels when they are excited by one of the many high energy sound sources caused when the vehicle is in use.
- Soundproof floors and ceilings.
- You do not need to soundproof the floor if there is no room below you.
- Heavy concrete ceilings won't benefit much from the additional mass of drywall and damping compound. Instead, add a drywall layer with an air gap in between, or fill the gap with fiberglass insulation.
An RF Switch or Microwave Switch is a device to route high frequency signals through transmission paths. RF (radio frequency) and microwave switches are used extensively in microwave test systems for signal routing between instruments and devices under test (DUT).
- In telecommunications, insertion loss is the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber and is usually expressed in decibels (dB).
- Whenever tests are performed on fiber optic networks or cable plants, the results are generally displayed on a meter readout in “dB.” Optical loss is measured in “dB” while optical power is measured in “dBm.” Loss is a negative number (like –3.2 dB) as are most power measurements.
- The matrix elements S11,S12,S21,S22 are referred to as the scattering parameters or the S-parameters. The parameters S11, S22 have the meaning of reflection coefficients, and S21, S12, the meaning of transmission coefficients.
In telecommunications, return loss is the loss of power in the signal returned/reflected by a discontinuity in a transmission line or optical fiber. This discontinuity can be a mismatch with the terminating load or with a device inserted in the line. It is usually expressed as a ratio in decibels (dB);
- Return loss, S11, antenna efficiency, and impedance bandwidth. S11 is a measure of how much power is reflected back at the antenna port due to mismatch from the transmission line. When connected to a network analyzer, S11 measures the amount of energy returning to the analyzer – not what's delivered to the antenna.
- In telecommunications, the reflection coefficient is the ratio of the complex amplitude of the reflected wave to that of the incident wave. In particular, at a discontinuity in a transmission line, it is the complex ratio of the electric field strength of the reflected wave ( ) to that of the incident wave ( ).
- Transmission loss (TL) in duct acoustics, together with insertion loss (IL), describes the acoustic performances of a muffler like system. It is frequently used in the industry areas such as muffler manufacturers and NVH department of automobile manufacturers.
Updated: 17th October 2019