WInRFCalc offers a free of charge RF toolbox with many interesting RF calculators and analysers can be downloaded, offering the following capabilities

• Antenna numbers

• Transmission loss

• Unit converters

• Attenuators

• EMC and Shielding

• RF Mixer analyser

• DSP

• General RF calculators

• Butterworth filters

• Impedance matching

• Interdigital filter calculator

Download WinRFCalc - https://hollandshielding.com/Windows-RF-calculator