Sonnet Tutorial

Ref : Sonnet Online Manuals

Sonnet Tutorial

指導教授 :吳瑞北教授組別 :Microwave Component小組


Introduction• Em performs an electromagnetic analysis of a microstrip, stripline, coplanar wavegui

de, or any other 3-D planar circuit by solving for the current distribution on the circuit metalization using the Method of Moments.


Getting Stared-Microstrip Band Stop Filter

Alumina substrate: r=9.8, thickness=20 mil;guided quarter-wavelength @ 5.5GHz 206 mil


Getting Stared-setting in Sonnet

Circuits to simulate are enclosed with a hermetic metal housing.Optional: lid may be removed for antenna simulation


Getting Started• Choosing units

• Setting up box parameters

• Determining cell sizes

• Setting up dielectric layers

• Adding metal rectangles to a circuit

• Adding metal polygons to a circuit

• Copying, flipping and moving polygons in a circuit

• Performing a simple analysis

• Plotting response data


Getting Started-Choosing units

Parameters Units


Getting Started -Setting up box parameters

Parameters BoxLosslessWG loadFree space

Saving time when simulating symmetry structure


Getting Started -Setting up dielectric layers

Parameters Dielectric Layers


Getting Started -Adding metal rectangles and polygons to a circuit

Add a polygon Add a rectangle

Metal/Brick mode

Add port Add via


Getting Started-Adding portsShift+Add port add port modePress “Esc” to exit add port mode


Getting Started-Performing a simple analysis

Save then press Em


Getting Started-Performing a simple analysis

• Simple sweep-For instance if the Frequency Units were set to GHz, then the values of 2, 10, 2 would start an analysis at 2 GHz and end at 10 GHz with steps of 2 GHz (e.g. 2, 4, 6, 8 and 10 GHz).

• Complex sweep-Complex sweeps are used to run an analysis using multiple sets of frequencies in sorted or unsorted order.

• Analysis file(.an)-There may be times where you will wish to analyze multiple circuits at the same set of frequencies. Rather than specifying frequency control information on an individual basis, you set the up the information once in an analysis control file.

• Verbose-Causes em to display messages in the output window during program execution describing the current state of the analysis.

• De-embed -The circuit is automatically de-embedded to the specified reference planes, or the box edge if no reference planes are specified in the geometry file.

• Memory save- The system matrix is filled in single precision which reduces memory requirements for storing the matrix to one half of that of double precision. If this option is not used, the matrix is stored in double precision.

• Make emvu file-Outputs current density information for the entire circuit which can be viewed using emvu.

• Multi-frequency caching -MFC is a technique that can dramatically reduce the em computation time when analyzing large circuits over many frequencies without any loss in accuracy.


Getting Started-View response


Special issue on port setting

Standard Box-Wall Ports Standard Ungrounded-Internal Ports

Via Ports Automatic-Grounded Ports


Special issue on via hole setting


Special issue on air bridge setting

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Sonnet Tutorial

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