Calculators

Useful calculators relating to RF Wireless Design

 

Microstrip Design and Analysis Spreadsheet

Stripline.gifBased on formulae in section 2.9 of "high Frequency Circuit Design and Measurements" P.C.L.Yip, ISBN: 0-412-34160-3

There is a more comprehensive free tool here: Applied Wave Research Inc. TXLINE

VSWRmeter.jpgReturn Loss and VSWR

Converts return-loss to reflection coefficient and VSWR.

SpringCoils.jpgSpring Coil Inductor Designer

Design close-wound air-cored spring inductors. Yields inductance, DC resistance and weight. Contains a useful SWG diameter look-up table.

SymAtt1.gifSymmetrical Attenuators

Design your own wideband attenuators (making good quality devices is another matter). Not the easiest spreadsheet to use. Contact Tim if you get stuck.

ImpMatch.gifLossy Wideband Impedance Transformer

Design your own wideband impedance transformers (again making good quality devices is another matter).

Iso1.gifISO 7637-2 pulse 5a 12V Suppression

Determines the energy dissipated in an ISO7637 load dump pulse as a function of the suppressor clamping voltage. Determine the number of transient suppressors needed to safely absorb that energy.

Pulse 5a (unlimited) for 12V systems.

Iso1.gifISO 7637-2 pulse 5a 24V Suppression

Determines the energy dissipated in an ISO7637 load dump pulse as a function of the suppressor clamping voltage. Determine the number of transient suppressors needed to safely absorb that energy.

Pulse 5a (unlimited) for 24V systems.

Iso1.gifISO 7637-2 pulse 5b 24V Suppression

Determines the energy dissipated in an ISO7637 load dump pulse as a function of the suppressor clamping voltage. Determine the number of transient suppressors needed to safely absorb that energy.

Pulse 5b (central limiter) for 24V systems.