Software
Name 
Abstract 
2.4 GHz Wireless Network Link Analysis

Interactive Wireless
Design Utilities. 
AlGaAs band diagram and EK diagram 
Educational Applet in
Solid State Materials. This will show change the composition of AlGaAs and its
corresponding properties. 
Amateur Radio RF Safety Calculator 
This program uses the
formulas given in FCC OET Bulletin No. 65 to estimate power density in the main
lobe of an antenna, with use of the EPArecommended ground reflection factor as
an option. This program is intended for approximate farfield
calculations. 
Antenna System Evaluator 
This JavaScript
program evaluates the performance of your antenna system, computing the
consequences of SWR and feedline loss. 
Antenna Tilt Calculator 
Interactive Wireless
Design Utilities. 
Approximate Air Coil Inductance Calculator

RF Design CGI

Calculate the frequency/length of antennas

n/a 
CMSA Filter Designer 
Designs a Digital
Filter and draws the frequency response. 
Coax Balun Design 
Calculates the half
wave length of the matching section of the 4:1 coax balun by using the the
equations taken from the ARRL Antenna Book. 
Coaxial Cable Attenuation & Power Handling
Calculator 
The calculator can be
used to estimate the attenuation (dB loss), power handling capability, and
transmission efficiency for some of the more popular Wireless Communications and
MIL Spec cables at the frequency of interest. 
Converison Formulas 
Some commonly used RF
conversion formulas. 
CUBICAL QUAD ANTENNA CALCULATOR 
A Java script cubical
quad antenna calculator. 
dB/Watts/ERP/EIRP Calculator 
This calculator
converts dB to Watts, Watts to dB, ERP and EIRP. 
Decibel Conversion Calculator 
Interactive Wireless
Design Utilities. 
Decibels and Distance 
This calculation will
give you the amount of attenuation, in decibels, you can expect with a change in
receiver distance, in a free field (outdoors). 
Dielectric Properties of Body Tissues at RF and Microwave
Frequencies for SAR Evaluations 
The tissue parameters
provided here are derived from the 4ColeCole Analysis in "Compilation of the
Dielectric Properties of Body Tissues at RF and Microwave Frequencies" by
Camelia Gabriel, Brooks Air Force Technical Report AL/OETR19960037.

Digital Circuits: CMOS Inverter 
The VTmatching issues
(for the design of threshold voltage of MOSFET) 
Distance & Bearing Calculator 
Interactive Wireless
Design Utilities. 
Downtilt Calculator 
Calculate coverage
areas for electrically downtilted antennas. 
Dual (Asymmetric) Stripline 
Impedance and
Capacitance Calculator 
Dual (Asymmetric) Stripline Noise Budget
Modeling 
Dual (Asymmetric)
Stripline Noise Budget Modeling 
Dual (Asymmetric) Stripline Impedance and Capacitance
Calculator 
Dual (Asymmetric)
Stripline Impedance and Capacitance Modeling 
Electrical Degrees Calculator 
This could be usefull
to determine if a structure is an effective reradiator of an RF signal.

Electromagnetics 
This applet
demonstrates how the different parameters affect the magnetic field obtained in
the air gap of a permenant magnet. 
Embedded Microstrip 
Impedance and
Capacitance Calculator 
Environmental Factor Analysis 
Interactive Wireless
Design Utilities. 
Fabrication Steps of an FET and a BJT 
The fabrication steps
of a pair of MetalOxideSemiconductor (MOS) Field Effect Transistor (FET) and a
Bipolar Junction Transistor (BJT) on a Silicon wafer is illustrated in this
applet. 
Folded Dipole Design 
Calculates the input
impedance of folded dipole. 
Formation of a PN Junction Diode and its Band
Diagram 
A graphical
illustration of the formation of a PN junction diode and its band diagram. It
shows both the band diagram and a chematic crosssection of the sample.

Fresnel Zone Calculator 
Interactive Wireless
Design Utilities. 
HaynesShockley Experiment 
Educational Applet in
Solid State Materials. Visualization of diffusion, drift and recombination of
excess minority carriers in a semiconductor. 
Horizontal antenna pattern 
Animated graphics of
antenna patterns for electrically downtilted antenna. 
Impedance Calculator 
InCircuit Design
Interactive Multilayer Impedance Calculator 
Indirect Recombination via a Gap State

Educational Applet in
Solid State Materials. It introduces the four basic processes in the
ShockleyReadHall statistics. 
Interactive Amplitude Modulation Model

Interactively explore
the mathematical model behind amplitude modulation. 
Interactive Digital Filter Design 
This is an interactive
filter design package, for designing digital filters. 
Interactive Frequency Modulation Model

Interactively explore
the mathematical model behind frequency modulation. 
IPCSM782 
This program is
intended to serve as a guide to the manipulation of data that supports the
concepts and methodology for developing surface mount land patterns that are
identified in IPCSM782, "Surface Mount Design and Land Pattern Standard".
Registration is required before you enter the calculator site.

Knife Edge Diffraction Loss Calculator

Interactive Wireless
Design Utilities. 
Lateral Crosstalk Modeling 
Parallel Conductors
Lateral Cross Talk Modeling 
Lumped Component Wilkinson Splitter/Combiner

Lumped Component
Wilkinson Splitter/Combiner Designer 
MATCHER 
Impedance Matching
Network Designer 
Microstrip 
Impedance and
Capacitance Calculator 
Microstrip Calculator 
This calculator
provides accurate microstrip transmission line analysis and synthesis. A
crosssection of a microstrip transmission line is shown below. The electrical
parameters may be determined from specified physical parameters, or the physical
parameters required to meet a given set of electrical parameters may be
found. 
Microstrip Impedance and Capacitance Calculator

Microstrip Impedance
and Capacitance Modeling 
Minimum Loss Attenuator 
This online tool
calculates lumped element circuits for PI and TEE attenuators in real
time. 
Mixer Spur Chart Calculator 
Calculates the
frequencies and power levels of the singletone mixer spurs.

MOS Transistor 
MOS transistor virtual
lab prototype 
nchannel MOSFET Fabrication 
The device fabrication
steps are shown for nchannel MetalOxideSemiconductor (MOS) Field Effect
Transistor (FET). All photolithography processes are shown by means of
animation. 
Omnidirectional Antenna Beamwidth Analysis

Interactive Wireless
Design Utilities. 
Operation of MOS Transistor 
Educational Applets in
Solid State Materials 
Panel Calculator 
Panel
Calculator 
Parabolic Reflector Analysis 
Interactive Wireless
Design Utilities. 
Pi and T Network Resistive Attenuation Calculator

RF Design CGI.

PLL Loop Filter Design Program 
A fast simple Java
routine for designing 3rd order PLL loop filters. 
PN Junction Diode 
A multimedia approach
to semiconductor fabrication steps. It's an interesting animated look at how
semiconductors are manufactured from silicon to the packaged ICs.

PN Junction Diode under Bias 
It shows both the
energy band under bias and the animated carriers flowing across the
junction. 
Polyphase TwoPath Filter Designer in Java

This is a simple
filter design program written entirely in Java. It calculates floatingpoint
coefficients of the twopath polyphase structure first described by F. Harris,
A. G. Constantinides and Valenzuela. 
Resonator Modeling Design Guide 
This online tool
calculates equivalent lumped element circuits for quarter and half wave
resonators in real time. 
Return Loss Calculator 
Interactive Wireless
Design Utilities. 
RF Safety Compliance Calculator 
This program uses the
formulas given in FCC OET Bulletin No. 65 to estimate power density in the main
lobe of an antenna, with use of the EPA recommended ground reflection factor as
an option. 
Smith Chart 
Hit the Play button
(triangle), and the program will display a circle with a radius equal to the
reflection coefficient magnitude (constant VSWR circle). 
Solid Sate: Zincblende and Diamond structures

It shows a 3D view of
the unitcell and a 3D view of the covalent bonds. 
Spicap 
An online engineering
tool that defines the frequency response and voltage coefficient for AVX ceramic
chip capacitors. 
Spitan 
An online engineering
tool that defines the frequency response for AVX tantalum chip
capacitors. 
Stripline Analysis 
Stripline Analysis
(experimental) 
Stripline Impedance and Capacitance Calculator

Stripline Impedance
and Capacitance Modeling 
Switched Capacitor Integrator Designer

This preliminary
synthesis program is still helpful though Polezero cancellation doesn't work
ideally, because of process variations. 
THE ELECTROMAGNETIC SPECTRUM 
An electromagnetic
spectrum calculator 
The Receiver Model Tool 
This Javascriptbased
tool allows you to enter photodiode and filter parameters, select an ANADIGICS
TIA, and calculate the output for Bandwidth, Sensitivity and Optical
Overload. 
The Smith Chart Java Applet 
It can calculate
resistance and reactance, draw points on the chart or calculate and draw
standing wave structure for a given point on the chart. 
The Transimpedance Amplifier Tool 
This particular
calculation uses a generic receiver model. Simply input the starting values to
configure the system with the desired elements. This model will calculate gain,
noise figure, dynamic range, and other system parameters. 
Time Domain vs. Frequency Domain 
This spectral
simulation is an interactive Java applet. You can change parameters by clicking
on the vertical arrow keys. The five control buttons at the lower right are used
to start (triangle) and pause (square) the simulation, to skip forward or back
one section at a time (double triangles), and to change speed (+ and ).

United States Frequency Allocations 30  3000
MHz 
United States
Frequency Allocations 30  3000 MHz 
Vertical antenna pattern 
Animated graphics of
antenna patterns for electrically downtilted antenna. 
Vertical Crosstalk Modeling 
Parallel Conductors
Vertical Cross Talk Modeling 
Voltage to Power Conversion Calculator

Voltage to Power
Conversion Calculator 
Wave Propagation along a Transmission Line

When a sine wave from
an RF signal generator is placed on a transmission line, the signal propagates
toward the load. This signal, shown here in yellow, appears as a set of rotating
vectors, one at each point on the transmission line. 