Custom Search
Over 10000 Pages Indexed

Your Host 
Kirt Blattenberger ... single handedly redefining what an engineering website should be.
5CCG (5th MOB): 
Hobby & Fun
Airplanes and Rockets: Equine
Kingdom: 
•−• ••−• −•−• •− ••−• •
RF Cafe Morse Code >Hear
It<


Job Board 

About RF Cafe© 

RF Cafe EMail 
AccelWare Unit Conversion Tool  powerful, intuitive, and easytouse 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. 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. Antenna Design Calculator The upper section relates antenna diameter and frequency to gain and beamwidth. Using the scroller, set the beamwidth against the 3 dB or 10 dB marker, and read off the corresponding frequency and diameter; or set the frequency against the diameter and read off the beamwidth. By Qpar Angus. Antenna Power Tools Andrew's complete collection of antenna planning software. Antenna System Evaluator Evaluate consequences of SWR & feedline losses, KD6DKS. Antenna System Planner By Andrew Corporation. Astronomy Kelper's 3rd Law, magnitude. ATC QuickCalc Capacitor Calculation, American Technical Ceramics. Attenuator Calculators "T" and Pi topologies using online interactive Excel OWA technology. Here is a JavaScript version. Attenuator Calculator Four topologies: "T", Pi, BridgedT, Reflection. Attenuator Calculator Very nicely done online interactive calculator  by Microwaves & RF, Paul Khanna of Phase Matrix DK1RM Here is a JavaScript version for Pi and T attenuators  auf Deutsch. Here it is in English. Other calculators available by clicking on the Tools link. Attenuators Minimum loss attenuator design. AVX SPIMIC Capacitor calculation. Besser Associates 4159493300 / Los Altos, CA Reflectometer, Butterworth Filter Designer, dBmtodbW, and Smith Chart applets. Broadcast Engineer's Calculators by SOB (Sweet Old Bob) HD cost estimates; Antenna, coax & other losses, Dual input HD Antenna TPO's; Convert units of Measure, High level combining; Look up ballpark coax loss & power ratings; Dehydrator size for up to 4 coax runs; Beam tilt and/or null fill Needed; STL path calculator for 950 paths; FM antennas; Gain of parabolic antenna; Channel vs. frequency; FM/TV; Plot Fresnel path; AM tower height & rigid coax; Power calculations; BTUs; Conduit size for your wire bundle; Does FM pattern meet FCC limits; Ohm's Law; Wire and circuit size for deicers; FCC Official RFR Model Program Link Broadcast Engineering Related Calculators Allen's Broadcast Engineering Extravaganza Lots of good JavaScript calculators: AM Common Point / Antenna Current Calculator, FM Transmitter Power Output Calculator, RPU/STL Transmitter Frequency Tolerance Calculator, AM Transmitter Harmonics Calculator, Free Space Loss Between Isotropic Radiators Calculator, 0.6 First Fresnel Radius Zone Calculator, VSWR Calculator, Coaxial Cable Loss Calculator, Coax Cable Loss/Antenna Gain Calculator, Opamp Gain Calculator Cable Performance Calculators Calculate loss & power, VSWR & return loss, by Times Microwave. Calc101 By webMathematica, scores of online interactive calculators for algebra, trigonometry, calculus, matricies, linear equations. Calculator Edge 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. CapCAD Capacitor calculation, by Dielectric Laboratories. Chemandy Electronics +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. Chemistry Calculators Boyle's Law, Charles' Law, STP, molar volume, etc, by 1728 Software Systems. Choke Designer Inductor values using standard cores. Chris Gillings' Cardboard Slide Rule Collection If you are at all nostalgic and also are a nerd, then you will drool over this collection by Chris Gillings. Andrew Antenna and Propagation Computer, Andrew Parabolic Antenna System Computer (1957), Andrew Parabolic Antenna System Computer (1964), Andrew Transmission Line Computer, BioMate, Blackwell Calculator, Althouse Chemical Co., Marconi Signal Source Calculator, Motorcraft Gasculator, National Standard Company Strip Calculator, Proportion Wheel, Radiac, No.1, Raytheon Radar Performance Calculator, Readymix Concrete Calculator, and many more. They're all here! CoilSim Basic ciol inductor calculator applet, by Nathan Iyer Coordinate System Converter Convert between rectangular, polar, spherical, and cylindrical coordinates. Connect802 Antenna System Designer An online calculator that creates a wireless network antenna system design report based on various parameters that you provide. It will help you predict endtoend performance and evaluate your network design when you plan a pointtopoint, or pointtomultipoint outdoor wireless network deployment. You'll be able to analyze the radio link and tune network parameters for optimal link suitability. ConvertIt Huge collection of converters and calculators. Cubicle Quad Antenna Calculator Determine dimensional quantities  javascript. Daycounter, Inc. Engineering Services Calculators for switching power supply, air core inductors, SallenKey LP Butterworth filter, L matching network, standard resistor value, PI & T pad attenuator, reactance, series  parallel impedance conversion, ZSY 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 Die Temperature vs. Power Dissipation An interactive calculator for estimating junction temperature from power dissipation and packaging/heatsink characteristics. By Analog Devices. DigSim Digital schematic editor & simulator from Berkeley. Dirac Delta "Science and engineering encyclopedia." Hundreds of JavaScript calculators, definitions, historical information, etc. eCalc 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. engApplets Java applets for engineering education. Engineering Calculators on Educypedia A pretty good collection of links to online calculators  satellites, attenuators, Smith Chart, VSWR, free space loss, etc. EIA Equipment Rack Stencils for Visio By Kirt Blattenberger. EIA Tube Bases for Visio Electromagnetic Field Applets Very nice graphical output and user interface, with animation.  Wave propagation  Field Polarization  Oblique Incidence  Oblique Incidence on Lossy Medium  Parallel Plate Waveguide  Rectangular Waveguide  Dielectric Slab Waveguide everything RF A nice collection of RF calculators.  Attenuator Calculator  Microstrip Impedance Calculator  Coax Impedance Calculator  Cascaded Noise Figure Calculator  Skin Depth Calculator  Wavelength Calculator  dBm to Watt Calculator  Watt to dBm Calculator Electric Field Units Converter Online converter by Compliance Engineering. Wavelength to frequency, V/m to dBuV/m V/m dBuV/m, dBm to dBuV/m (50Ω), mW/cm^2 to W/m^2 (Free Space), mW/cm^2 to V/m (Free Space), mW/cm^2 to A/m (Free Space), mW/cm^2 to pJ/cm^2 (Free Space), W to dBm (50Ω), dBm to V (50Ω), V to dBm (50Ω) Excalibur RPN Calculator Applet Excalibur does not use more conventional "algebraic" notation like many lowend calculators on the market. Instead it uses the highpowered parenthesisfree RPN notation (Reverse Polish Notation). 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. Field Strength Calculator Enter frequency and antenna gain, then any one of received power, electric field strength, magnetic field strength, or power density and this calculates the others. Field Strength Calculator V/m, dBuV/m, dBuA/m, pT, dBpT, Tesla, Guass, A/m, mW/cm^2 & W/m^2. From Compliance Engineering. Filter Coupling Matrix Calculator Facilitates synthesis of N+2 coupling matrices for Chebyshev bandpass filtering functions, with arbitrary finiteposition transmission zeroes. Filter Design Spreadsheets Waveguide Filter Designer , Combline and Interdigital Filter Design Spreadsheet by RF Shop. Financial & Mortgage Calculators Over 100 personal finance calculators. Financial Calculators Loan amortization, interest, loan payment by 1728 Software Systems. FM Antenna Calculator 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. FreeSpace Loss Calculator Other calculators for  Fresnel Clearance Zone  EIRP  Distance between two points using  Latitudes and Longitudes Flex Analysis 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 interferencefree wireless systems. Fresnel Clearance Zone Calculator By TeraBeam Fresnel Zone Calculator The calculator will generate the radius of the first Fresnel zone only (at the obstacle point or the midpoint), the 60% (no obstacle) radius and the height of the earth curvature at the midpoint of the Total link distance. By Wireless Connections. HiDigit Scientific calculator with extended capabilities. Advantages include a simple input format even for the most complicated scientific formulas; i.e., enter "10pi" instead of "10*pi" or complex numbers as "1+2i". HP48 Calculator Programs Lots of engineering programs. Impedance Matching Network Designer John Wetherell, Berkeley, CA. Inflation Calculator U.S., Canadian, and Italian versions. Enter begin and end dates and get equivalent dollar values, by S. Morgan Friedman. JPole Antenna Calculator Enter the operating frequency and calculate antenna dimensions  online. 
Julian Date Calculator Calculates JDs for a given month. Karnaugh Map Calculator By Russell Sasamori. Karnaugh Minimizer A tool for developers of small digital devices and radio amateurs, also for those who is familiar with Boolean algebra and Karnaugh Map optimization method, best suits for electrical engineering students. By Shurik Soft. LC Filter Designer This is an interactive design package for designing analogue (i.e. hardware) filters made of inductors and capacitors (Ls and Cs). From University of York. Link Budget Calculator A towertotower, overtheair JavaScript calculator, by Wireless Connections. LOGInterMod Leslie Green / U.K. A Windows program (Freeware) that calculates twotone intermodulation products up to the 30th order. Look Angle CalculatorUse our look angle calculator to calculate the pointing angles your dish needs in order to receive a particular satellite. Martindale's Calculator OnLine Center More than 20,000 calculators  this site has grown incredibly over the years. Math eBook This website is fully interactive and will allow kids to practice and learn math with ease. It is designed to help students of different grades, starts from Kindergarten, Elementary, Middle School and High School Math. The goal of this website is to provide new education tools to teachers, parents and off course students who can benefit from it. Mathebook.net has Online Tutorials as well as Downloadable pdf tutorials. MegaConverter2 Multifunctional units converter. Microwave Calculator Free From JFW Industries. Microwave Impedance Calculator (MWIJ 1.0) Substrate line impedance calculator by Rogers Corporation. Written in Java  nice. Mixer Spur Calculator By Hittite Microwave. Mortgage Calculators 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. Mortgage Calculator 8 different calculators: Mortgage calculator, Affordability, Early PayOff, Interest Only, Advanced Mortgage calculator, Mortgage Refinance, Basic Amortization, and Comparison calculator N Calculators 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. Online Conversion Convert just about anything to just about anything else. OpAmp Gain FeedbackInput Resistor Calculator GAINSTAGECALC is a resistor selection tool for op amp gain stage. This KnowledgeBase Javascript calculator allows the designer to find the resistor values for both inverting and noninverting op amp gain stages  with and without compensation for openloop gain effects. By TI. Operational Amplifiers: Interactive Design Tools Simple OpAmp Buffer Error Budget Calculator  from Analog Devices. PCB Trace & Via Calculator A very complete set of online calculators for microstrip, embedded, and differential microstrip impedance; stripline and differential stripline impedance; stripline and microstrip crosstalk; currentcarrying capacity of traces and thermal vias; heat dissipation of thermal vias. By Sören Nilsson. PCB Trace Width Conductor thickness, ampacity, temperature rise. PCB Trace Impedance Calculator Online interactive calculator for stripline and microstrip, by U. of MissouriRolla EMC Lab. PC Magazine Website More than 140 free programs and calculators for electrical, civil, mechanical, and other engineering fields. PDA Calculator Software ADACS has a nice collection of software for engineering, scientific and financial applications. PLL Phase Noise Calculator By Hittite Microwave. Poles & Zeros Calculator Move the poles and zeros to see the frequency domain response. Power Calculator Motor & line calculations, conversions. Power Dissipation vs. Die Temperature Calculator By Analog Devices. Power Switch Designer By Fairchild Semiconductor. Power Supply National's power supply design tool. Power & Voltage Converter Convert between units of dBm, dBW, watts, dBV, volts. Radiated Power Calculator ERP, EIRP, dBuV/m, dBm & mW. From Compliance Engineering. Radiated Power Converter Online converter by Compliance Engineering. EIRP (mW) to ERP (mW) to dBuV/m @ 3m to dBuV/m @ 10m. Radio Calculators 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. Chemistry / Electronics / Math / Physics Resistor Color Code Calculator (Reversible) This resistor color code calculator also provides a table of nearest standard values of resistors for standard tolerances. Resistor Ratio Calculator Finds R1/R2 combinations using standard resistor values, by Bennet Blake. Resistor Ratio Calculator Leslie Green / U.K. A resistive network calculator for problems using two or three fixed resistors. You have to use standard values, but you need some silly ratio like 3.245 V from a 10 V source. This program helps you to pick the optimum resistor values for simple resistor dividers or opamps (inverting and noninverting). Freeware. RF Cafe Online Calculators Many online calculators for noise figure/temperature, filter responses, voltage dividers, waveguide cutoff frequency, VSWRreturn lossreflection coefficient conversions and more, by Kirt Blattenberger. RF Calc General purpose engineering calculator by MilMega  includes table of physical constants, component parameter calculators (capacitance, inductance, resonance, pads), multiple transmission line calculators. RF Calculator Wavelength, dBm, dBuV, W, dBuV/m, mW/cm^2, pJ/cm^2, V & VSWR. From Compliance Engineering. 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, crosstalk, much more. By Amanogawa. RF Calculators On the Federal Communications Commission website. RF Calculators by Phase Matrix, San Jose, CA Here is a very nice collection of interactive calculators: Tee & Pi Attenuators, Power to Voltage in a 50 ohm system, Converting dB to Ratio, mW to dBm, dBW, dBV & Volts in a 50 ohm system, Converting Phase Noise To Jitter (Part 1), Reflectometers Conversions: Interconverting VSWR, Return Loss, Reflection Coefficient and Mismatch Loss ,Designing Equal or Unequal Split Wilkinson Power Dividers, Cascading Three Stages for Gain, NF & P1 dB, VSWR Mismatch Analysis and Power Uncertainty, Measuring Oscillator Output VSWR using Power Load Pulling, Microstrip Line Design, Designing Unequal Resistive Power Dividers/Couplers. RF Cascade Workbook 2003 RF, system, cascade for Excel spreadsheet. RF Cascade Workbook 2004 RF, system, cascade for Excel spreadsheet. RF Cascade Workbook 2005 RF, system, cascade for Excel spreadsheet. RF Workbench RF, system, up/downconverter, spurious analysis, budget  best value out there. RLC Tuned Circuit Calculator Enter values for R, L, C, and/or frequency and it calculates the others. Also calculate capacitor and inductor impedance. Ohm's Law and RC time constant calculator. RPN Calculator This handy Reverse Polish Notation calculator was written by the infamous Kelly Painter. Note the logo in the upper right corner (hover your cursor over it). RW Calc Software Free from RadioWaves, several RF utilities, such as converters, farfield calculation, Fresnel zone clearance and free space propagation. Sage Notebook Spreadsheets for many realms of science and engineering. All are free downloads SatelliteRelated Calculators Sun interference, powertonoise, tilt angle, antenna gain and more than thirty other calculators. Satellite Link Budget Calculator Uplink/downlink calculator, Satellite Signals site. Signals & Noise Java applet for exploring random processes. Smith Chart for Visio By Kirt Blattenberger. SNR / THD / SINAD Calculator By Analog Devices. Sunshine Design Engineering Services Ramona, CA Design specialties  hardware, CAD and software engineering. Test Engineering Services  20 years experience RF/Microwave and Semiconductor Parametric Test. Electronic Calculator  Multiple pages of calculators for capacitance, resistance, inductance, attenuation, microstrip, resonance, etc. Many astronomical calculators. SWR Calculator VNA Help  for microwave network analyzers. Toroid Calculator Uses standard cores; e.g., T50. Tower Planner Andrew's handy calculator for height, wind speed, terrain, etc. Transmission Line Calculator The CircuitCalculator.com Website Excelbased calculator Transmission Line Calculator By Kevin Schmit, W9CF. TRL / LRL Calculator TRL (Through, Reflect, Line) and LRL (Line, Reflect, Line) reference plane calculators provided by ElectroPhotonics. TXLine Transmission Line Calculator by Applied Wave Research. This file seems to be no longer available on the AWR website. Ultra Converter I, Ultra Converter II If these to converters don't have it, you don't need to convert it! by 1728 Software. Units Converter: VRMS / dBm / dBu / dBV A utility to convert between standard units of power measurement and signal strength  from Analog Devices Vertex 42 Engineering calculators & converter applets & spreadsheets. Excel templates, financial calculators, and calendars. We also host The Excel Nexus  The ultimate directory of 3rdparty Microsoft Excel® resources, including addins, templates, tutorials, and consulting services. Virtual Slide Rules Standard slide rule  EngCom.net Pickett slide rule  Antiquark.com Voltage Divider Resistor Calculator Table of tworesistor voltage dividers using standard 5% tolerance resistor. Opamp feedbackinput resistor pairs can also be specified. Very clever cell shading scheme for indicating deviation from exact ratio that is specified. Provided by Mark Rushakoff. VSWR Calculator Animated version from BesserNet. VSWR, Power Converter, Inductance Calculator 97236175082 / Israel Free downloadable VSWR, power converter, inductance calculator, written by Dr. Ronen Holtzman for Elisra Microwave Division engineers. Waveguide Filter Dimension and Electrical Response Calculator By Guided Wave Technology. Waveguide Applets Very nice graphical output and user interface, with animation.  Parallel Plate Waveguide  Rectangular Waveguide  Dielectric Slab Waveguide Web Cool Tools RF & microwave design applets that use numerical input or sliders for setting parameters. WRConnect Waveguide structure design tool. Corrugated LowPass Filter Design Workshop. Waveguide & EM Calculators This is a very nice Java/JavaScriptbased set of calculators with a great user interface. Wireline Calculator WiseCalc WiseCalc is the complete mathematical text engine calculator for your computer.  it's FREE!  it has a multiline texteditor type of interface  it has 450+ unit conversions builtin  it has hundreds of functions builtin  it can save and open calculation pages  it can evaluate builtin and user definable functions, units, constants, and matrices WLAN Link Planning Calculators Many calculators for wireless link planning: Fresnel zone, diffraction, path loss, link budget, cable loss. Yagi Java Applet Change frequency, element diameter, and number of segments. 
A Disruptive Web Presence™
Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe Webmaster: Kirt Blattenberger KB3UON 
RF Cafe Software
RF Cascade Workbook 
Product & Service Directory Personally Selected Manufacturers 

RF Cafe TShirts & Mugs  
RF Cafe SoftwareCalculator WorkbookRF Workbench Smith Chart™ for Visio Smith Chart™ for Excel 