Sonnet User's Guide - Sonnet Software

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Sonnet User’s Guide Good and Bad Placements of Subdivision Lines . . . . . . 217 Subdivision Line Orientation . . . . . . . . . . . . . . . . . . 221 Setting Up Circuit Properties . . . . . . . . . . . . . . . . . . . . 223 Setting Up the Coarse Step Size Frequency Sweep. . . . 224 Subdividing Your Circuit . . . . . . . . . . . . . . . . . . . . . . . 225 Analyzing Your Subdivided Circuit . . . . . . . . . . . . . . . . . 225 15 CIRCUIT SUBDIVISION TUTORIAL . . . . . . . . . . . . . . . . . . . . 227 Obtaining the Example File . . . . . . . . . . . . . . . . . . . . . 228 Adding the Subdivision Lines. . . . . . . . . . . . . . . . . . . . . 228 Setting Up Circuit Properties . . . . . . . . . . . . . . . . . . . . 231 Subdividing Your Circuit . . . . . . . . . . . . . . . . . . . . . . . 233 Analysis of the Network File . . . . . . . . . . . . . . . . . . . . . 236 Additional Improvements . . . . . . . . . . . . . . . . . . . . . . . 238 16 VIAS AND 3-D STRUCTURES . . . . . . . . . . . . . . . . . . . . . . 241 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Restrictions on Vias . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Creating the Vias . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242 Via Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242 Via Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243 Via Posts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245 Adding a Via to Ground . . . . . . . . . . . . . . . . . . . . . 246 Multi-layer Vias . . . . . . . . . . . . . . . . . . . . . . . . . . 248 Deleting Vias . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 Via Loss. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251 Via Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251 Simple Via Example . . . . . . . . . . . . . . . . . . . . . . . . . . 252 A Conical Via . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252 17 THICK METAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 Thick Metal Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 Creating a Thick Metal Polygon . . . . . . . . . . . . . . . . . . . 255 Viewing Thick Metal in the Project Editor . . . . . . . . . . . . 257 Restrictions with Thick Metal Polygons . . . . . . . . . . . . . . 259 Modeling an Arbitrary Cross-Section. . . . . . . . . . . . . . . . 260 Thick Metal in the Current Density Viewer . . . . . . . . . . . 261 10
Table of Contents 18 DIELECTRIC BRICKS . . . . . . . . . . . . . . . . . . . . . . . . . . . 263 Applications of Dielectric Bricks. . . . . . . . . . . . . . . . . . . 265 Guidelines for Using Dielectric Bricks . . . . . . . . . . . . . . . 265 Subsectioning Dielectric Bricks . . . . . . . . . . . . . . . . . 265 Using Vias Inside a Dielectric Brick . . . . . . . . . . . . . . 265 Air Dielectric Bricks . . . . . . . . . . . . . . . . . . . . . . . . 266 Limitations of Dielectric Bricks . . . . . . . . . . . . . . . . . . . 266 Diagonal Fill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266 Antennas and Radiation . . . . . . . . . . . . . . . . . . . . . 266 Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266 Dielectric Brick Concepts . . . . . . . . . . . . . . . . . . . . . . . 267 Creating a Dielectric Brick. . . . . . . . . . . . . . . . . . . . 267 Viewing Dielectric Bricks. . . . . . . . . . . . . . . . . . . . . 267 Defining Dielectric Brick Materials . . . . . . . . . . . . . . 268 Changing Brick Materials . . . . . . . . . . . . . . . . . . . . . 269 Z-Partitioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270 19 ANTENNAS AND RADIATION . . . . . . . . . . . . . . . . . . . . . . . 273 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274 Modeling Infinite Arrays . . . . . . . . . . . . . . . . . . . . . . . . 274 Modeling an Open Environment . . . . . . . . . . . . . . . . . . . 275 Validation Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 279 Far Field Viewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280 Analysis Limitations . . . . . . . . . . . . . . . . . . . . . . . . 281 Spherical Coordinate System . . . . . . . . . . . . . . . . . . 282 Normalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285 Polarization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 20 FAR FIELD VIEWER TUTORIAL . . . . . . . . . . . . . . . . . . . . . 287 Creating an Antenna Pattern File . . . . . . . . . . . . . . . . . . 288 Running the Far Field Viewer . . . . . . . . . . . . . . . . . . . . 289 Calculating the Response . . . . . . . . . . . . . . . . . . . . . . . 290 Selecting Phi Values . . . . . . . . . . . . . . . . . . . . . . . . 291 Selecting Frequencies. . . . . . . . . . . . . . . . . . . . . . . 291 Selecting the Response. . . . . . . . . . . . . . . . . . . . . . . . . 292 Zooming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 11
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