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About RF Cafe
Copyright: 1996 - 2024 Web BSEE - KB3UON 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... All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowl My Hobby Website: |
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Engineering Calculators & Converter Applets & Spreadsheets |
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See also the RF Cafe Online Calculators and vintage Cardboard Slide Rule Calculators. A good way to find on this page what you need is do a browser page search. If you cannot find what you are looking for here, try the Software page. Unit Conversion Tool - powerful, intuitive, and easy-to-use utility for quick and accurate conversion between almost every possible unit of measure, from one system to another. The latest version includes more than 2200 units in 78 categories. The categories include: length, area, speed, mass, numbers, volume, time, density, force, pressure, energy, power, flow, temperature, angle, light, fractions, data transfer, and many more. Fully functional Online version now available. This is a nice assortment (83 at this time) of electrical & electronics parameter calculators, with a couple mechanical types as well. There are many types of substrate impedance and line dimension calculators, and calculators for voltage dividers, inductance and capacitance, coax lines and waveguides, amplifiers, impedance matching, free space loss, EIRP, radar range, and noise figure. AlphiMAX P2P Signal Propagation Calculator A very nice graphical interface tools that enables you to compare manufacturers, while taking into account the terrain of your area, terrain type, climate, antenna type, define fade margin and more. Use of a GPS database produces a very accurate elevation profile between antenna locations. Big list of online calculators Evaluate consequences of SWR & feedline losses, KD6DKS. "T" and Pi topologies using online interactive Excel OWA technology. Minimum loss attenuator design. This has to be one of the Web's largest collection of unique (as opposed to copied) online calculators. Each of these topics has many calculators within them. General, Civil Engineering, Optical Engineering, Mechanical Engineering, Plastics Engineering, Metallurgy, Electronics Engineering, Electrical Engineering, Chemical Engineering, Physics, Ceramics, Oil & Gas, Structural Engineering. +62 31 8914627 / Jawa Timur, Indonesia Large selection of online interactive calculators for RF design, including attenuators, capacitance, resonance, RF traps, and microstrip impedance. Design, development and small scale manufacture of simple RF and Audio items. We also have the capability for ATE programming in Labview, HP/Agilent Vee or Visual Basic, and can produce associated test jigs. Boyle's Law, Charles' Law, STP, molar volume, etc, by 1728 Software Systems. Convert between rectangular, polar, spherical, and cylindrical coordinates. Huge collection of converters and calculators. Daycounter, Inc. Engineering Services Calculators for switching power supply, air core inductors, Sallen-Key LP Butterworth filter, L matching network, standard resistor value, PI & T pad attenuator, reactance, series - parallel impedance conversion, Z-S-Y parameter conversion, Rollet Stability (K) Factor, complete RF amplifier design & analysis, LC resonance. Dielectric Constant of Water (Complex) Calculates the real and imaginary parts of the dielectric constant for water, sung temperature, salinity, and frequency. By Gareth Harris Advanced features including support for complex numbers, unit conversion, base conversion, and has a built in equation solver. eCalc is one of the best calculators on the web and runs completely in your browser without requiring any special plugins. Electrical engineers will find eCalc's complex math especially useful since it supports both rectangular and polar formats. eCalc supports both RPN and Algebraic Input Modes. Java applets for engineering education. EIA Equipment Rack Stencils for Visio By Kirt Blattenberger. Electromagnetic Field Applets Very nice graphical output and user interface, with animation. - Circuits everything RF A nice collection of RF calculators. - Microstrip Impedance Calculator - Cascaded Noise Figure Calculator Fast Fourier Transform Calculator Do an FFT by entering the time domain data in the Time Domain Data box with each sample on a new line. For complex (I and Q) data, the real and imaginary components should be on the same line separated by a comma. Do an Inverse FFT by entering the frequency domain data in the Frequency Domain Data box with each sample on a new line. For complex (I and Q) data, the real and imaginary components should be on the same line separated by a comma. Financial & Mortgage Calculators Over 100 personal finance calculators. Loan amortization, interest, loan payment by 1728 Software Systems. by ERI (Electronics Research, Inc.) Plots FCC 60 dBu contours right on the page. Also many PDF files with Engineering Tables: Geotechnical Investigations for Antenna Support Structures, Classes of FM Stations, FM Broadcast Channels, AM Tower Heights by Frequency, 54 dBu Contour Distances, 60 dBu Contour Distances, Site Plot Plan, Wind Speed Map, Ice Probability Map, Antenna Support Structure Design Radius of Curvature Requirement. Distance between two points using Latitudes and Longitudes Evaluate thermal/mechanical performance of flex circuits by Rogers Corporation. Frequency Finder - Open TV Channel Applet Sennheiser searches the FCC database for an open channel for running interference-free wireless systems. Lots of engineering programs. Huge collection of online calculators for tax, finance, math, engineering, mortgages, logistics, loans, budgets, conversions, sports & health, statistics, mechanics, and other topics. U.S. Bureau of Labor Statistics (BLS). Enter the operating frequency and calculate antenna dimensions - online. Martindale's Calculator On-Line Center More than 20,000 calculators - this site has grown incredibly over the years. Multifunctional units converter. Large variety of financial calculators for mortgages, principal calculation, cost per thousand, affordability, income requirements, FHA, refinance, HELOC, loan comparison tools, points, rent vs buy, & more. 8 different calculators: Mortgage calculator, Affordability, Early Pay-Off, Interest Only, Advanced Mortgage calculator, Mortgage Refinance, Basic Amortization, and Comparison calculator Electronic circuit design calculators can assist you to solve, analyze and determine the circuit design with capacitors, inductors, resistors, diodes, transistors, etc. Many other types of financial, mathematical, and science calculators. Noise Figure <--> Noise Temperature Calculator Convert just about anything to just about anything else. A very complete set of online calculators for microstrip, embedded, and differential microstrip impedance; stripline and differential stripline impedance; stripline and microstrip crosstalk; current-carrying capacity of traces and thermal vias; heat dissipation of thermal vias. By Sören Nilsson. By Hittite Microwave (now Analog Devices). Move the poles and zeros to see the frequency domain response. Motor & line calculations, conversions. Pi attenuators and air inductor java calculators by Jim Hawkins. Random Science Tools and Calculators The intention of this site is to produce scientific tools and calculators, and store information which will be useful to scientists, engineers, students and enthusiasts. Resistor Color Code Calculator (Reversible) This resistor color code calculator also provides a table of nearest standard values of resistors for standard tolerances. Collection of commonly used calculators including Attenuators, Bandpass Filters, Cascaded Components, Coils / Inductors, Delta-Wye (Resistors), Directional Couplers, Doppler Shift, Highpass Filters, Lowpass Filters, Mixer Frequency Conversion, Near / Far Field, Noise Figure|Temp, Path Loss, 1-Way, Path Loss, 2-Way, Propagation Time, Radar Blind Speed, Radar Horizon / Line of Sight, Rectangular Cavity, Skin Depth, Smith Chart, VSWR|RL|Gamma, Voltage Divider, Voltages & Power - Vrms, Vavg, Vpk Many online calculators for noise figure/temperature, filter responses, voltage dividers, waveguide cutoff frequency, VSWR-return loss-reflection coefficient conversions and more, by Kirt Blattenberger. RF & Analog Tutorials w/Java Apps Website This is a VERY nice collection of Java applets and some PDF format tutorials. Antenna patterns, waveguide modes, electromagnetic wave fronts, interactive Smith chart, transmission lines, standing waves, resonant circuits, radiation of wires, cross-talk, much more. By Amanogawa. RF, system, cascade for Excel spreadsheet. RF, system, up/downconverter, spurious analysis, budget - best value out there.
Satellite Link Budget Calculator Uplink/downlink calculator, Satellite Signals site. Java applet for exploring random processes. By Kirt Blattenberger. The CircuitCalculator.com Website Excel-based calculator Transmission Line Calculator by Applied Wave Research. This file seems to be no longer available on the AWR website. If these to converters don't have it, you don't need to convert it! by 1728 Software. This is a very extensive measurement value and units converter for length, weight, height, area, temperature, time, pressure, speed, force, etc. Each and every converter has a detailed explanation with an example. RF & microwave design applets that use numerical input or sliders for setting parameters. Corrugated Low-Pass Filter Design Workshop WLAN Link Planning Calculators Many calculators for wireless link planning: Fresnel zone, diffraction, path loss, link budget, cable loss. |
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These calculators are offered free of charge
- some by vendors and others by individuals. Some are stand-alone and others function
online via Java from the web page. The majority are engineering calculators, but
some are scientific calculators, some are amateur radio calculators, and some are
electrician type calculators. 
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These Are Available for Free |