Technical Notes

http://www.rfglobalnet.com

RF Global Net Company

Online Interactive Design Tools ( 온라인 RF Calculator )

(등록 메뉴가 나오면 등록을 한번만 하면 됨)

Software Name

Abstract

2.4 GHz Wireless Network Link Analysis

Interactive Wireless Design Utilities.

AlGaAs band diagram and E-K 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 EPA-recommended ground reflection factor as an option. This program is intended for approximate far-field 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 4-Cole-Cole Analysis in "Compilation of the Dielectric Properties of Body Tissues at RF and Microwave Frequencies" by Camelia Gabriel, Brooks Air Force Technical Report AL/OE-TR-1996-0037.

Digital Circuits: CMOS Inverter

The VT-matching 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 re-radiator 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 Metal-Oxide-Semiconductor (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 cross-section of the sample.

Fresnel Zone Calculator

Interactive Wireless Design Utilities.

Haynes-Shockley 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

In-Circuit 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 Shockley-Read-Hall 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.

IPC-SM-782

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 IPC-SM-782, "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 Cross-talk 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 cross-section 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 single-tone mixer spurs.

MOS Transistor

MOS transistor virtual lab prototype

n-channel MOSFET Fabrication

The device fabrication steps are shown for n-channel Metal-Oxide-Semiconductor (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 Two-Path Filter Designer in Java

This is a simple filter design program written entirely in Java. It calculates floating-point coefficients of the two-path 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 Pole-zero cancellation doesn't work ideally, because of process variations.

THE ELECTROMAGNETIC SPECTRUM

An electromagnetic spectrum calculator

The Receiver Model Tool

This Javascript-based 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 Cross-talk 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.


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