Tools to calculate the following:

• frequency to wavelength for radio waves
• conversion of metric to Imperial (meters to feet and inches) lengths
• conversion of VSWR losses to dB losses
• conversion of impedance values to VSWR, return loss and mismatch loss
• conversion of reactance value to inductance or capacitance value
• addition or subtraction of two decibel (dB) values
• quarter-wave line matching transformer

Frequency / wavelength calculator

 

Metric to Imperial units calculator

• Convert decimal meters to feet and inches, or
• Convert decimal feet to meters

Simply type a meters or feet length into the appropriate field, and the corresponding value will be calculated as you type:

Convert VSWR value to power loss

Any value of VSWR higher than 1:1 can cause power loss due to reflected RF being dissipated in the feeder line. Use this to calculate how much power loss is due to VSWR:

 

Convert impedance values to VSWR, return loss and mismatch loss

Choose a system or coax cable impedance, input a complex load impedance, and calculate the following:

• Reflection coefficient
• VSWR
• Return loss
• Mismatch loss

 

Convert reactance value to inductance or capacitance value

 

Decibel calculator

Add or subtract two decibel (dB) values

 

Quarter-wave line matching transformer

The 1/4-wave line matching transformer, also known as a Q-section, is a section of feed-line having a specific impedance designed to transform an input impedance to a different output impedance.

This can be useful when connecting feedlines of different impedances: say, a length of 50Ω coaxial line to a length of 75Ω coaxial line.

The matching 1/4-wave section is connected in series between the input line and the output line, or load.