Table of Contents
What is a good VSWR value?
A VSWR of less than 1.5:1 is ideal, a VSWR of 2:1 is considered to be marginally acceptable in low power applications where power loss is more critical, although a VSWR as high as 6:1 may still be usable with the right equipment.
What is VSWR formula?
VSWR = (ZL + ZO + ZO – ZL)/(ZL + ZO – ZO + ZL) = ZO/ZL. We noted above that VSWR is a specification given in ratio form relative to 1, as an example 1.5:1. There are two special cases of VSWR, ∞:1 and 1:1. A ratio of infinity to one occurs when the load is an open circuit.
Why is the VSWR important?
The VSWR is always a real and positive number for antennas. The smaller the VSWR is, the better the antenna is matched to the transmission line and the more power is delivered to the antenna. The minimum VSWR is 1.0. In this case, no power is reflected from the antenna, which is ideal.
What is VSWR in RF cable?
Voltage Standing Wave Ratio (VSWR) is defined as the ratio between the incident and reflected wave in an RF component or system. It determines the efficiency of power transmission from a source to the load through a transmission line (or cable).
What is VSWR in LTE?
The Voltage Standing Wave Ratio (VSWR) is an indication of the amount of mismatch between an antenna and the feed line connecting to it. This is also known as the Standing Wave Ratio (SWR). The range of values for VSWR is from 1 to ∞ .
How do you get VSWR?
It is possible to derive the most basic VSWR formula or equation directly from its definition. The VSWR definition states that the VSWR is equal to the maximum voltage on the line divided by the minimum voltage.
Is low VSWR good?
A VSWR value under 2 is considered suitable for most antenna applications. The antenna can be described as having a “Good Match”. So when someone says that the antenna is poorly matched, very often it means that the VSWR value exceeds 2 for a frequency of interest.