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TotalTemp Technologies (Thermal Platforms) - RF Cafe

Cafe Press
Innovative Power Products Resistors Terminations

RF Cafe Espresso Engineering Workbook™
Current version is 12.15.2023 - check back often for updates

Newest Addition: Butterworth Lowpass Filter Calculator
w/Gain (G), Phase (θ), and Group Delay (τd)

Espresso Engineering Workbook: Homepage - RF Cafe


Power Factor Calculator (Espresso Engineering Workbook) - RF Cafe

Power Factor

Spurious Mixer Products Calculator (Espresso Engineering Workbook) - RF Cafe

Spurious Mixer Products

Ohm's Law Calculator (Espresso Engineering Workbook) - RF Cafe

Ohm's Law

Microstrip / Stripline Calculator (Espresso Engineering Workbook) - RF Cafe

Microstrip / Stripline

Resistors, Inductor, Capacitor Combinations (Espresso Engineering Workbook) - RF Cafe

RLC Combinations

Espresso Engineering Workbook: Cascaded System - RF Cafe

Cascaded System Calculator

Espresso Engineering Workbook: Delta-Wye - RF Cafe

Delta-Wye Calculator

Espresso Engineering Workbook: Inductance - RF Cafe

Inductance Calculator

Espresso Engineering Workbook: Frequency Conversion - RF Cafe

Frequency Conversion Calculator

Espresso Engineering Workbook: Noise Figure - RF Cafe

Noise Figure Calculator

2-Way Path Loss, Espresso Engineering Workbook - RF Cafe - RF Cafe

2-Way Path Loss Calculator

Espresso Engineering Workbook: Radar Blind Speed - RF Cafe

Radar Blind Speed Calculator

Espresso Engineering Workbook: Rectangular Cavity Resonance - RF Cafe

Rectangular Cavity Resonance Calculator

Espresso Engineering Workbook: Smith Chart - RF Cafe

Smith Chart

Espresso Engineering Workbook: Voltage Divider - RF Cafe

Voltage Divider Calculator

Espresso Engineering Workbook: VSWR | Return Loss | Gamma - RF Cafe

VSWR | Return Loss | Gamma Calculator

Espresso Engineering Workbook: VBA Code - RF Cafe

VBA Code Sample

Butterworth Bandpass Filter Calculator (Espresso Engineering Workbook) - RF Cafe

Butterworth Bandpass Filter

Butterworth Lowpass Filter Calculator (Espresso Engineering Workbook) - RF Cafe

Butterworth Lowpass Filter

Capacitance Calculator (Espresso Engineering Workbook) - RF Cafe


Helical Resonator Calculator (Espresso Engineering Workbook) - RF Cafe

Helical Resonator

Coaxial Cable Calculator (Espresso Engineering Workbook) - RF Cafe

Coaxial Cable

Complex Numbers, Espresso Engineering Workbook - RF Cafe

Complex Numbers

Attenuators, Espresso Engineering Workbook - RF Cafe - RF Cafe

Attenuator Calculator

Directional Couplers, Espresso Engineering Workbook - RF Cafe - RF Cafe

Directional Coupler Calculator

Espresso Engineering Workbook: Doppler Shift - RF Cafe

Doppler Shift Calculator

Filters, Espresso Engineering Workbook - RF Cafe - RF Cafe

Filter Calculator

Near Fields, Espresso Engineering Workbook - RF Cafe - RF Cafe

Near Field Calculator

1-Way Path Loss, Espresso Engineering Workbook - RF Cafe - RF Cafe

1-Way Path Loss Calculator

Propagation Time, Espresso Engineering Workbook - RF Cafe - RF Cafe

Propagation Time Calculator

Radar Horizon, Espresso Engineering Workbook - RF Cafe - RF Cafe

Radar Horizon Calculator

Skin Depth, Espresso Engineering Workbook - RF Cafe - RF Cafe

Skin Depth Calculator

Units Conversions, Espresso Engineering Workbook - RF Cafe - RF Cafe

Units Conversion Calculators

Voltage Conversions, Espresso Engineering Workbook - RF Cafe - RF Cafe

Voltage Conversion Calculator

The first major new release of RF Cafe's spreadsheet (Excel) based engineering and science calculator is now available - Espresso Engineering Workbook™ (click to download).  RF Cafe Espresso Engineering Workbook™ is provided at no cost, compliments of my generous sponsors.

The original calculators are included, but with a vastly expanded and improved user interface. Error-trapped user input cells help prevent entry of invalid values. An extensive use of Visual Basic for Applications (VBA*) functions now do most of the heavy lifting with calculations, and facilitates a wide user-selectable choice of units for voltage, frequency, speed, temperature, power, wavelength, weight, etc. In fact, a full page of units conversion calculators is included. A particularly handy feature is the ability to specify the the number of significant digits to display. Drop-down menus are provided for convenience.

Now that a more expandable basis has been created, I plan to add new calculators on a regular basis.

For the time being, the worksheets and VBA code are password protected. At some point, a version might be made available with full access, but during the development stage, I prefer to not expose all my hard work for easy poaching.

A lot of effort has been expended validating calculations, including references from books, magazines, and other software. As always, you are advised to check results against other sources if something seems off. If you do find an error, please report it to me ASAP so it can be corrected with the next release.

The file is in an xlsx format compatible back to Excel 2007 - and it may work for even earlier versions.

In appreciation for RF Cafe's sponsors, hyperlinked thumbnails to their websites are included on the homepage.

* Note: Because VBA code is used, you must allow Excel security to enable macros.

This edition includes the following calculators:



Posted on September 21, 2023

Rigol DHO1000 Oscilloscope - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

1996 - 2024


Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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