SWR, isn’t this acronym sounds familiar to you here? Well, you’re damn right about it! SWR is actually a short acronym for “Standing Wave Ratio”, which is the ratio of the amplitude of a partial standing wave at an antinode to the amplitude at opposite node. The transmissions are normally handle through an electrical transmission line.

Technically, the SWR is defined as a voltage ration called the “VSWR”, which is meaning for “Voltage Standing Wave Ratio”.

If you want to measure the SWR, then you’ll need to use the SWR meter. Basically, the SWR meter is an item of radio equipment that being used to check the quality of the match between the antenna and the transmission line. To use the SWR meter, you must connect it onto the line as close as possible to the antenna, as this can reduce the amount of energy loss to the minimal level.

Due to the expensive LCD meter, many of the radio amateur run their radio station without an SWR meter at all! For those that encountered the same problem, maybe this high accuracy PIC 16F877A LCD 100W HF SWR Meter is what you’re looking for in long time…