MICROWAVE OFFICE®
Application Notes & Design Examples
8PSK and MWO AMP
This project uses the VSS to generate an 8PSK signal. The modulated signal in turn is used to drive a power amplifier (PA) design created in Microwave Office.
16QAM with Amp and BER
This example demonstrates the use of the VSS model to incorporate the characteristics of a Microwave Office (MWO) amplifier design into the system diagram. It also demonstrates the generation of a Bit Error Rate (BER) curve dependent on the swept power level of the 16QAM source.
Annular Ring Tutorial
How to create VIAs with Annular Rings for Multilayer PCB Applications.
Balanced Amplifier Layout Application Note
This application note goes through the process of creating layout for a balanced amplifier circuit. The document focuses on all the steps required to get the layout correct, rather than the design techniques for this amplifier. The application note goes into very detailed descriptions of advanced layout techniques. This application note is intended for user's who have a basic understanding of Microwave Office.
Broadband UHF/VHF Amplifier Design using Coaxial Transformers
This application note describes a 30 MHz to 512 MHz power amplifier. The LDMOS in the design is a Polyfet device and the design was done by Polyfet employees using Microwave office. The simulation results are very close to the measured results, both with linear measurements and non-linear measurements.
CATV
The schematic CATV has a chain to be simulated with Harmonic Balance. The input signal is a 7 channel CATV signal with the center channel starting of 80 dB blow the other channels. Each of the blocks is a behavioral block. Each block could be replaced with the physical circuit to be used for the chain. The project is then displaying the full spectrum at the output of each element. Equations are used to calculate the difference between the notch channel and the full power channel. Finally, this channel to notch ratio is plotted versus the stage of the chain. All of the filters in this example are set to pass all 7 CATV tones to be able to measure the channel to notch ratio.
Chain
This example illustrates the various methods available in both Microwave Office (MWO) and Visual Systems Simulator (VSS) to perform a two-tone analysis on cascaded RF blocks. In this case, two amplifiers are included in a chain with a filter and two lossy elements. The graphs compare the simulation results from harmonic balance (MWO), complex envelope (VSS), and the new RF Inspector (VSS).
Design a Low-Noise Amplifier with VoltaireLS
Microwave Office is ideal for designing low-noise amplifiers (LNAs). In this application note, we show how a technique called negative-image modeling can be used to design and optimize input and output circuits for an 8-12 GHz LNA, and how the tune mode and genetic optimizer simplifies the design process.
Designing Edge-Coupled Microstrip Band-Pass Filters
Using Microwave Office
The design of printed filters, which perform close to their modeled specifications, can be a difficult and time consuming process using traditional methods. This application note shows a straightforward and largely non-mathematical method of tackling this problem using Microwave Office (MWO) assuming little or no knowledge of filter design.
Explain Harmonics
This project was originally setup for a Cable TV demonstration. However, it is a good example to demonstrate how the harmonic settings work in Microwave Office. This example will step though several stages of building up a circuit and show what the results will look like at each stage. The document will suggest changing harmonic settings to get a feel for what the settings will do.
High-Speed Backplane Design with Microwave Office
This white paper covers the design process implemented at Xilinx for developing a high speed serial backplane to explore interconnects using a variety of connectors and PCB materials.
Improving MMIC and RFIC Design Flows
New EDA technologies like Microwave Office and new foundry libraries help to streamline the development of RF and microwave ICs.
Ku Band ECM
This is an edge coupled microstrip (ECM) filter designed on a Rogers TMM 10 substrate.
Layout Line Types
This project describes how the layout shapes for transmission lines are drawn on particular layers in the layout view of the schematic.
LNA 5GHz
Many times board designers have vias that are not defined with the drill tools but rather defined with a circle on a specific layer. In Microwave Office, when the user chooses to export a drill file, the program will only export the information of the location of the drill tool locations, not circles drawn on a specific layer. In the scripting environment, the user has access to all the layout information, so a script such as the one included in the project will export circles on the via drawing layer to a drill file.
LNA 10GHz
This project shows the design of a 10 GHz LNA built on 10 mil alumina using a NEC 76038 GaAs MESFET. The LNA has 7.7dB gain and 2.15dB NF at 10 GHz.
Low-Distortion Mixer Design with Microwave Office
This application note and AWR project explain ways of doing low-distorition mixers and the benefits of doing them with Microwave Office.
Mixed Common and Differential Measurements
This project shows how to measure differential and common mode S-parameters using the MMCONV model, which drives and views a coupled transmission line model in either common or differential mode. This project will demonstrate a technique for determining the common and differential characteristic impedances of coupled lines.
MMIC Two Stage Amp
This project shows the design of a 10-12 GHz MMIC Amplifier built using a generic AWR MMIC process. The amplifier has nominal gain of 17 dB. The design is set up for tuning the input and interstage matching networks.
MMIC Two Stage Amplifier with Sonnet
This is a two stage MMIC power amplifier example that demonstrates many of the benefits to using Microwave Office for GaAs MMIC design.
Multicarrier EDGE
This example demonstrates the generation of a multi-carrier EDGE signal to drive a Microwave Office Power Amplifier (PA) design in order to make Adjacent Channel Power Ratio (ACPR) measurements at various signal power levels.
Printed Circuit Board (PCB) Layout Application Note
This application note covers some valuable layout concepts for doing printed circuit board designs using Microwave Office.
Pulsed RF
This example shows how the use Microwave Office (MWO) to simulate a modulated input using the Harmonic Balance. This example is a pulsed RF example where the RF is at 500 MHz, and the RF is being pulsed with a 10 Hz square wave.
Rat Race Coupler
The theoretical relationship for a rat-race coupler is that the outputs should be -3dB relative to the input power, and separated by 180 degrees of phase. To accomplish this, the four feed lines are separated by 90 degrees electrically, with a 270 degrees segment closing the loop.
Simulation Study of Broadband LNA for Software Radio Application
This report describes the design of a broadband low noise amplifier (LNA) for the frequency range from 800MHz to 2 GHz, using Gummel-Poon BJT (GBJT) with a current-gain bandwidth product, ft of 9GHz.
This application note discusses how to create projects that use temperature as a variable in Microwave Office (MWO) and Analog Office (AO) simulations.
WCDMA Reference DesignFrequency of operation 2110-2170 MHz. Suitable for TDMA, CDMA and multi-carrier amplifier applications. To be used in Class AB for PCN-PCS/cellular radio and WLL applications.Capable of Handling up to 125 Watts (CW) Output Power in the linear range of operation.
Yield Optimization
Using Yield Optimization allows designers to set the values of their parameters to ensure maximum yield of the the circuits they design.
