For applet samples and full details on the applet toolbox, go to web home page

Note: All applets are now available on the log-in pages.

Microwave System Design Tools and EW Applications, Second Edition,
by Peter W East.
Published by Artech House Inc, January 2008.

Applet Summary:

Chapter 1  Introduction

Demonstrator Applet

This simple demonstrator program accomplishes in 50 lines of Java code an interactive graphical applet displaying a basic mathematical waveform.

Chapter 2  RF Analysis Aids

dBmi : dBW/m2 Conversion

Converts between dBmi and dBW/m2 receiver system sensitivity definitions.

Cascaded Noise Figure

Calculates the overall noise figure and noise temperature of up to four amplifying or attenuating components in cascade.

Transmission Line

Demonstrates the characteristics and principles of transmission lines; available power, VSWR, line voltage, line impedance, and matching.

Cascaded Mismatches

Evaluates accurate VSWR of two transmission-line components in cascade separated by a variable attenuator, with adjustable source and load VSWR.

Chapter 3  RF Chain Components

Transmission Line Filter

Design of a fifth-order line and stub lowpass microwave filter. Butterworth and Chebyshev responses; demonstrates tolerances to line impedance, load match and insertion loss.

Directional Coupler Operation

Demonstrates the operation of lossy and lossless directional couplers with a variety of mid-band coupling values over a range of port match conditions.

Microstrip Directional Coupler

The applet encompasses the latest published design rules for accurately designing microstrip broadside, coupled-line, directional couplers in the frequency range 1GHz to 20GHz.

Mixer Spurii

Intermodulation component generation up to the seventh-order in single diode, balanced and doubly balanced mixer types as a function of LO and signal drive levels.

Chapter 4  Antennas

Reflector Antenna Patterns

Design and tolerances of a parabolic dish antenna. Assesses the effects of feed illumination, F/D ratio, and defocusing on the pattern and gain.

Array Antenna Patterns

Plots array antenna azimuth and elevation patterns with choices of feed taper, element size, positioning and number.

Antenna Polarization Coupling

Power coupling loss and polarization characteristics of a pair of arbitrarily polarized antennas.

Antenna Near-Field Power

Power density and power received by a test antenna in the near-field of a large aperture antenna. The receive antenna can be positioned off-axis.

Chapter 5  Amplifiers

Amplifier Dynamic Range

Effect of amplifier compression slope and signal level on the generation of intermodulation components up to the seventh-order.

Signal+Noise Vector Limiting

Vector simulation using the frequency component representation of the limiting process.

Limiting Amplifier Operation

Demonstrates how a limiting amplifier affects signal, noise and signal-to-noise ratio in and through the limiting region.

Compression Amplifier Design

Design equations for logarithmic or power-law, limiting-summation amplifiers.

Chapter 6  Signal Detection

Video Noise Rate Statistics

Zero crossing rate and positive peak occurrence rate for various video band shapes and shape orders.

Signal Detection Probability

Basic probability distribution of signal + Gaussian noise and threshold triggering probability.

Pulse Thresholding

Oscilloscope-type representation of pulse triggering and threshold hysteresis fallback probability along a pulse, for a variety of receiver types.

Threshold Triggering Probability

Pulse triggering probability around threshold, for a variety of receiver types and designs.

Video-OR Threshold

Triggering and signal-to-noise performance of the video-OR circuit used to combine multiple receiver channels before thresholding, with dominant signals in one or two channels.

Vector Thresholding

Various vector receiver thresholding algorithms are compared. Performance is displayed as a function of threshold and signal-to-noise ratio.

Multisample Noncoherent Integration

Optimizing noncoherent integration SNR improvement using multiple samples along a video pulse for various video band shapes.

Chapter 7  Microwave Receivers

Frequency Discriminator SNRO & Noise Spectra

Signal-to-noise ratio across the operating band with adjustable gain and noise figure variations.

Directional Coupler Multiplier

Models the 90 3dB coupler with detector diodes as an RF multiplier.

RF Amplifier DLVA Cascading

RF amplification and cascaded detector log-video amplifier output combining.

Pulse Filtering Distortion

Effects of RF filter bandwidth, pulse width, and frequency offsets on the output pulse shape.

Compressive Receiver Performance

Compressive receiver design and performance; effect of pulse width, rise-time, relative delay, RF offset, and DDL parameters on compression gain.

Digital FFT Receiver Performance

Digital FFT receiver design; effect of window functions, pulse width, rise-time, relative delay, frequency offset, number of bits, ADC linearity, and clock jitter. Also models signal overlap and complex signals.

Receiver Sensitivity

Sensitivity and SNR performance of eight types of common microwave receivers.

Chapter 8  EW Measurement Systems

Circular Matrix DF Array

Design tolerances of the phase modes generated by an N-port Butler matrix feeding an N-element circular DF array.

Deambiguity Design

Deambiguity margin design of a four-discriminator phase encoding system for IFM and multibaseline interferometer DF systems.

IFM and Interferometer Design

Detection, ambiguity probability and effect of design tolerances on a two-discriminator IFM or two-baseline interferometer system.

Amplitude Comparison DF

Amplitude comparison DF system design and evaluation of three common algorithms. DF error analysis for various real antenna patterns including those input by the user.

Fourier Transform Error Analysis

Analyzes the mode structure of error data using an adaptable Fourier Transform. Examples of DF systems measurement error are included. User data can also be input. Also a general purpose Fourier and correlation analysis tool.

ACDF Resolving Interferometer Ambiguities

Ambiguity tolerance using amplitude comparison DF system to resolve shortest baseline ambiguities of an interferometer DF system.

Chapter 9  Operational Performance

ESM Detection Range

Far-field received power levels from a transmitter over sea paths.

Radar Detection Range

Far-field received power levels from a radar target over sea paths.

Sea Surface Scintillation

Models the effect of surface wave slopes in the sea occurring between a transmitter and receiver causing variations of the surface reflected part of the received signal.

Bistatic Reflections

Contours of constant time-delay and constant RCS reflected signal for separated transmitter and receiver against the same visible target.

ESM Clutter Modeling

Received power v time response from a complex modulated pulsed radar when both radar and receiver are immersed in a cluttered land or littoral environment.

Spatial Decorrelation of Clutter

Amplitude and direction of arrival v time response received from a complex modulated pulsed radar when affected by local ground clutter.

Passive Location

Accuracy comparison of DF and TDOA location systems having random errors.

ESM Sensitivity Advantage

Sensitivity and range advantage probability of an ESM system located on a known RCS platform.

Jammer Protection Zones

Protection regions for jammers operating in self-defense or area defense modes.


Contact email:

My ISP: PlusNet

Artech House Website: Artech House, Inc

Recommended RF Systems and Architecture Consultancy: RFSA Consulting

Updated December 11th 2012