RF MODULE

More documents

Recommendations

Info

34 | CHAPTER 2: TUTORIAL MODELS model agree very well with those found by Li and Nikolova in Ref. 1. Figure 2-4 shows the computed sensitivity curves for this model. Figure 2-4: Sensitivity curves for real and imaginary parts of S 11 with respect to the 45-degree wall position. It should be noted that the paper is not 100% clear about the sign convention for the position parameter (called dL here) so we used the sign that gives agreement. It is trivial to perform the sensitivity analysis also for S 21, but in that case the results do not agree with those in the paper. One possible explanation is that a different phase reference may have been used for S 21 in the paper. Reference 1. D. Li and N.K. Nikolova, “S-parameter sensitivity analysis of waveguide structures with FEMLAB,” Proc. COMSOL User’s Conference 2005, Boston. Model Library path: <strong>RF</strong>_Module/Tutorial_Models/waveguide_optimization
Modeling Using the Graphical User Interface MODEL NAVIGATOR 1 Start COMSOL Multiphysics. 2 In the Model Navigator, select 2D from the Space dimension list. 3 Click the Multiphysics button. 4 In the Model Navigator open the COMSOL Multiphysics folder, then select Deformed Mesh>Parameterized Geometry. 5 Click the Add button. 6 In the Model Navigator open the <strong>RF</strong> Module folder, then select In-Plane Waves>TE Waves>Harmonic propagation. 7 Click the Add button. 8 In the Model Navigator open the COMSOL Multiphysics folder, then select Optimization and Sensitivity>Optimization. 9 Click the Add button. 10 Click OK. GEOMETRY MODELING 1 Go to the Draw menu and select Specify Objects > Line. 2 Under Style, select Closed polyline (solid). 3 In the X and Y edit fields, enter the following coordinate values: PROPERTY EXPRESSION X -0.1392 -0.0348 -0.0348 0 0 -0.032 -0.1392 Y 0.0348 0.0348 0.1392 0.1392 0.032 0 0 4 Click OK. WAVEGUIDE OPTIMIZATION | 35
Page 1 and 2: COMSOL Multiphysics RF MODULE V ERS
Page 3 and 4: CONTENTS Chapter 1: Introduction Mo
Page 5 and 6: Results and Discussion. . . . . . .
Page 7 and 8: Chapter 4: Optics and Photonics Mod
Page 9 and 10: 1 Introduction The RF Module Model
Page 11 and 12: highlights. The categories here inc
Page 13 and 14: TABLE 1-1: RF MODULE MODEL LIBRARY
Page 15 and 16: 2 Tutorial Models This chapter cont
Page 17 and 18: Results and Discussion Figure 2-1 s
Page 19 and 20: 4 Draw a square with corners at (
Page 21 and 22: COMPUTING THE SOLUTION Click the So
Page 23 and 24: Results and Discussion The dipole a
Page 25 and 26: PHYSICS SETTINGS Variables 1 Choose
Page 27 and 28: 5 Click OK to close the dialog box
Page 29 and 30: Model Library path: RF_Module/Tutor
Page 31 and 32: 4 From the Solve menu, open the Sol
Page 33 and 34: them from the eigenvalues. The appl
Page 35 and 36: 5 On the Port page, set the values
Page 37 and 38: 5 On the Port page, enter 36.4 in t
Page 39 and 40: Waveguide Optimization Introduction
Page 41: Results and Discussion Figure 2-3 s
Page 45 and 46: 3 Select Boundary 7 and set the Con
Page 47 and 48: POSTPROCESSING AND VISUALIZATION Fo
Page 49 and 50: The solution takes a few minutes to
Page 51 and 52: Night side Earth surface Ionosphere
Page 53 and 54: Results and Discussion The model pr
Page 55 and 56: 4 Select both spheres and click the
Page 57 and 58: RF and Microwave Models In this cha
Page 59 and 60: measure of the transmittance and re
Page 61 and 62: y 1 cm is at about 7.5 GHz. At the
Page 63 and 64: By feeding the circulator at a diff
Page 65 and 66: Importing the Geometry from a Binar
Page 67 and 68: MESH GENERATION This model uses the
Page 69 and 70: It is more instructive to look at t
Page 71 and 72: Note: When displaying S-Parameter v
Page 73 and 74: Monoconical RF Antenna Introduction
Page 75 and 76: 50 Ω, to obtain maximum transmiss
Page 77 and 78: Figure 3-7 shows the antenna radiat
Page 79 and 80: 2 Select the RF Module>Electromagne
Page 81 and 82: 13 Zoom in around (0, 0) using the
Page 83 and 84: 4 In the Contour levels area, click
Page 85 and 86: 2 Clear the Keep current plot check
Page 87 and 88: 6 Click the Solve button on the Mai
Page 89 and 90: Results and Discussion The figure b
Page 91 and 92: PHYSICS SETTINGS Point Settings Def
Page 93 and 94:
2 In the x-axis area, select the Ex
Page 95 and 96:
Because the impedance is inversely
Page 97 and 98:
4 From the Space dimension list, se
Page 99 and 100:
2 Select Boundaries 1, 2, 4, and 6.
Page 101 and 102:
4 On the Pointwise Constraints page
Page 103 and 104:
12 Click the Solve button on the Ma
Page 105 and 106:
Module. The electromagnetic cavity
Page 107 and 108:
EIGENFREQUENCY VS. TEMPERATURE By r
Page 109 and 110:
GEOMETRY MODELING 1 Go to the Draw
Page 111 and 112:
3 Set dx, dy, and dz to u, v, and w
Page 113 and 114:
20 Select the Solve using solver se
Page 115 and 116:
Computing the Solution Using a Para
Page 117 and 118:
8 Click Solve. 9 When the parametri
Page 119 and 120:
H-Bend Waveguide with S-parameters
Page 121 and 122:
Model Library path: RF_Module/RF_an
Page 123 and 124:
1 From the Postprocessing menu, cho
Page 125 and 126:
The rectangular port is excited by
Page 127 and 128:
Figure 3-16 shows a single-mode wav
Page 129 and 130:
Figure 3-18: The S 21 parameter (in
Page 131 and 132:
PHYSICS SETTINGS First set up the b
Page 133 and 134:
FREEZING THE BOUNDARY MODE ANALYSIS
Page 135 and 136:
Page 137 and 138:
Microwave Cancer Therapy Introducti
Page 139 and 140:
The model takes advantage of the pr
Page 141 and 142:
DOMAIN AND BOUNDARY EQUATIONS—HEA
Page 143 and 144:
Figure 3-23: The computed microwave
Page 145 and 146:
solutions for both the electromagne
Page 147 and 148:
4 Select Subdomain 1, then enter th
Page 149 and 150:
1 Click the Plot Parameters button
Page 151 and 152:
sar_in_human_head_interp.txt. That
Page 153 and 154:
The bioheat equation produces a sim
Page 155 and 156:
3 Click OK. 4 From the Options menu
Page 157 and 158:
17 In the Work-Plane Settings dialo
Page 159 and 160:
SETTINGS SUBDOMAIN 19 epsilonr_brai
Page 161 and 162:
4 Click the Init tab and type 0 in
Page 163 and 164:
POSTPROCESSING AND VISUALIZATION 1
Page 165 and 166:
The walls of the oven and the waveg
Page 167 and 168:
Figure 3-29: Temperature in the cen
Page 169 and 170:
3 Click the block symbol again and
Page 171 and 172:
2 At the waveguide end, Boundary 23
Page 173 and 174:
4 Click OK to generate the plot bel
Page 175 and 176:
Page 177 and 178:
Because the filter cutoff should be
Page 179 and 180:
the force is applied. Figure 3-32 d
Page 181 and 182:
6 Then the ECAD Import Options dial
Page 183 and 184:
PHYSICS SETTINGS Subdomain Settings
Page 185 and 186:
solver takes more steps than it sto
Page 187 and 188:
3 Select Subdomain 1 and clear the
Page 189 and 190:
Page 191 and 192:
Balanced Patch Antenna for 6 GHz In
Page 193 and 194:
k0 = ω ε0 µ 0 All metallic objec
Page 195 and 196:
divided by the input power. In Figu
Page 197 and 198:
Reference 1. E. Recht and S. Shiran
Page 199 and 200:
10 Select the objects SQ2, CO1, and
Page 201 and 202:
43 Specify two spheres with the fol
Page 203 and 204:
inputs are feeding the antenna, lik
Page 205 and 206:
the width of the PML is equal to λ
Page 207 and 208:
a toggle button that shifts between
Page 209 and 210:
5 Select Coarse solver from the tre
Page 211 and 212:
maxE = max(EdB); minE = min(EdB); E
Page 213 and 214:
exterior of the PML that shows a ve
Page 215 and 216:
13 Choose Extrude from the Draw men
Page 217 and 218:
2 Click the Settings button. 3 In t
Page 219 and 220:
Sea Bed Logging Introduction The Se
Page 221 and 222:
Figure 3-39: Electric field magnitu
Page 223 and 224:
PHYSICS SETTINGS Scalar Variables 1
Page 225 and 226:
Page 227 and 228:
5 Click the General tab. From the P
Page 229 and 230:
Optics and Photonics Models In this
Page 231 and 232:
Model Definition The model is built
Page 233 and 234:
Model Library path: RF_Module/Optic
Page 235 and 236:
PHYSICS SETTINGS Scalar Variables S
Page 237 and 238:
POSTPROCESSING AND VISUALIZATION By
Page 239 and 240:
Model Definition The geometry is a
Page 241 and 242:
2 In the list of application modes,
Page 243 and 244:
Because the refractive index of GaA
Page 245 and 246:
5 Click OK twice to see the followi
Page 247 and 248:
Bandgap Analysis of a Photonic Crys
Page 249 and 250:
a 2 a 3 × b1 = 2π----------------
Page 251 and 252:
The five lowest bands for the (1, 1
Page 253 and 254:
Modeling Using the Graphical User I
Page 255 and 256:
Subdomain Settings 1 Open the Subdo
Page 257 and 258:
3 Click the Parametric tab. Select
Page 259 and 260:
3 Click OK to see the following plo
Page 261 and 262:
fem.appl{1}.prop.analysis = 'harmon
Page 263 and 264:
Model Definition The mode analysis
Page 265 and 266:
2 Select the RF Module>Perpendicula
Page 267 and 268:
4 On the Contour page, give Magneti
Page 269 and 270:
includes only two independent param
Page 271 and 272:
OPTIONS AND SETTINGS 1 Open the Con
Page 273 and 274:
The problem becomes well-posed by a
Page 275 and 276:
POSTPROCESSING AND VISUALIZATION Th
Page 277 and 278:
7 Click OK. 8 From the Postprocessi
Page 279 and 280:
the computed propagation constants
Page 281 and 282:
3 The default eigenmode is the one
Page 283 and 284:
Compare these ideal values of the p
Page 285 and 286:
Stress-Optical Effects with General
Page 287 and 288:
The PDE solved is Navier’s equati
Page 289 and 290:
and εx ∂u = ∂x εy ∂v = ∂y
Page 291 and 292:
Model Library path: RF_Module/Optic
Page 293 and 294:
NAME EXPRESSION DESCRIPTION B2 0.65
Page 295 and 296:
2 In the Subdomain Expressions dial
Page 297 and 298:
4 Initialize the mesh in this geome
Page 299 and 300:
Note: This model includes an extens
Page 301 and 302:
3 Enter 1.46 in the text field Sear
Page 303 and 304:
In these expressions, w 0 is the mi
Page 305 and 306:
After 90 fs the pulse has reached t
Page 307 and 308:
4 Select the RF Module>In-Plane Wav
Page 309 and 310:
Boundary Conditions 1 From the Phys
Page 311 and 312:
6 Click the Remesh button; when the
Page 313 and 314:
2 On the General page, make sure th
Page 315 and 316:
Propagation of a 3D Gaussian Beam L
Page 317 and 318:
Figure 4-15: After 20 fs the pulse
Page 319 and 320:
7 Click the Delete Interior Boundar
Page 321 and 322:
Boundary Conditions 1 From the Phys
Page 323 and 324:
5 From the Options menu, select Sup
Page 325 and 326:
INDEX 3D electromagnetic waves mode
Page 327 and 328:
efractive index 222, 254 resistance
show all

RF MODULE

Create successful ePaper yourself

Delete template?

Save as template?