RF MODULE

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316 | CHAPTER 4: OPTICS AND PHOTONICS MODELS
INDEX 3D electromagnetic waves model 116, 156 3D waveguide 116 A absorbing layers 222 anisotropic permeability 52 antenna impedance 66, 75 antennas 183 conical 65 magnetic dipole 80 <strong>RF</strong> 65 application mode Axisymmetric TE waves 81 Axisymmetric TM waves 71 Bioheat equation 137 Boundary mode analysis 122 Electromagnetic waves 122 In-plane TE waves 225, 233, 245 Perpendicular currents 35 Perpendicular Hybrid-Mode Waves 261 Perpendicular hybrid-mode waves 257 Plane Strain 261 TM waves 137 axisymmetric TE waves model 80 axisymmetric TM waves model 65 azimuthal magnetic field 66 B balanced antennas 183 bandgap analysis 239 bioheat equation model 129 birefringence 260 stress-induced 268 boundary mode analysis 122 boundary mode analysis model 116, 156 C capacitive coupling 99 cavity resonances 112 characteristic impedance 75 circuit port SPICE Import boundary condition 78 circulator 50 cladding 254 coaxial cable, feeding a waveguide 204 confined mode 254 conical antennas 65 convergence analysis 273 coupling variable scalar 75 cross-section plot 202 cutoff frequency 117, 157, 232, 236 D dipole, magnetic 80 drift, in eigenfrequency 96 E effective mode index 255 eigenfrequency drift 96 electromagnetic wave model 3D 116, 156 errors in modeling 276 expansion coefficient 277 F far-field computation 77 radiation patterns 69 ferrite circulator 50 FFT 296, 303 fiber optical 254 silica glass 254 single-mode 254 Floquet periodicity boundary conditions 240 frequency normalized 255 G Gaussian beam 294, 307 generalized plane strain 277 INDEX| 317
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COMSOL Multiphysics RF MODULE V ERS
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CONTENTS Chapter 1: Introduction Mo
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Results and Discussion. . . . . . .
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Chapter 4: Optics and Photonics Mod
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1 Introduction The RF Module Model
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highlights. The categories here inc
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TABLE 1-1: RF MODULE MODEL LIBRARY
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2 Tutorial Models This chapter cont
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Results and Discussion Figure 2-1 s
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4 Draw a square with corners at (
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COMPUTING THE SOLUTION Click the So
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Results and Discussion The dipole a
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PHYSICS SETTINGS Variables 1 Choose
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5 Click OK to close the dialog box
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Model Library path: RF_Module/Tutor
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4 From the Solve menu, open the Sol
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them from the eigenvalues. The appl
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5 On the Port page, set the values
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5 On the Port page, enter 36.4 in t
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Waveguide Optimization Introduction
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Results and Discussion Figure 2-3 s
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Modeling Using the Graphical User I
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3 Select Boundary 7 and set the Con
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POSTPROCESSING AND VISUALIZATION Fo
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The solution takes a few minutes to
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Night side Earth surface Ionosphere
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Results and Discussion The model pr
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4 Select both spheres and click the
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RF and Microwave Models In this cha
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measure of the transmittance and re
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y 1 cm is at about 7.5 GHz. At the
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By feeding the circulator at a diff
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Importing the Geometry from a Binar
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MESH GENERATION This model uses the
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It is more instructive to look at t
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Note: When displaying S-Parameter v
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Monoconical RF Antenna Introduction
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50 Ω, to obtain maximum transmiss
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Figure 3-7 shows the antenna radiat
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2 Select the RF Module>Electromagne
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13 Zoom in around (0, 0) using the
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4 In the Contour levels area, click
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2 Clear the Keep current plot check
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6 Click the Solve button on the Mai
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Results and Discussion The figure b
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PHYSICS SETTINGS Point Settings Def
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2 In the x-axis area, select the Ex
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Because the impedance is inversely
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4 From the Space dimension list, se
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2 Select Boundaries 1, 2, 4, and 6.
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4 On the Pointwise Constraints page
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12 Click the Solve button on the Ma
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Module. The electromagnetic cavity
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EIGENFREQUENCY VS. TEMPERATURE By r
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GEOMETRY MODELING 1 Go to the Draw
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3 Set dx, dy, and dz to u, v, and w
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20 Select the Solve using solver se
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Computing the Solution Using a Para
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8 Click Solve. 9 When the parametri
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H-Bend Waveguide with S-parameters
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Model Library path: RF_Module/RF_an
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1 From the Postprocessing menu, cho
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The rectangular port is excited by
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Figure 3-16 shows a single-mode wav
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Figure 3-18: The S 21 parameter (in
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PHYSICS SETTINGS First set up the b
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FREEZING THE BOUNDARY MODE ANALYSIS
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Microwave Cancer Therapy Introducti
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The model takes advantage of the pr
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DOMAIN AND BOUNDARY EQUATIONS—HEA
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Figure 3-23: The computed microwave
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solutions for both the electromagne
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4 Select Subdomain 1, then enter th
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1 Click the Plot Parameters button
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sar_in_human_head_interp.txt. That
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The bioheat equation produces a sim
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3 Click OK. 4 From the Options menu
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17 In the Work-Plane Settings dialo
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SETTINGS SUBDOMAIN 19 epsilonr_brai
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4 Click the Init tab and type 0 in
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POSTPROCESSING AND VISUALIZATION 1
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The walls of the oven and the waveg
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Figure 3-29: Temperature in the cen
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3 Click the block symbol again and
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2 At the waveguide end, Boundary 23
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4 Click OK to generate the plot bel
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Because the filter cutoff should be
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the force is applied. Figure 3-32 d
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6 Then the ECAD Import Options dial
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PHYSICS SETTINGS Subdomain Settings
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solver takes more steps than it sto
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3 Select Subdomain 1 and clear the
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Balanced Patch Antenna for 6 GHz In
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k0 = ω ε0 µ 0 All metallic objec
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divided by the input power. In Figu
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Reference 1. E. Recht and S. Shiran
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10 Select the objects SQ2, CO1, and
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43 Specify two spheres with the fol
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inputs are feeding the antenna, lik
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the width of the PML is equal to λ
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a toggle button that shifts between
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5 Select Coarse solver from the tre
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maxE = max(EdB); minE = min(EdB); E
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exterior of the PML that shows a ve
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13 Choose Extrude from the Draw men
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2 Click the Settings button. 3 In t
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Sea Bed Logging Introduction The Se
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Figure 3-39: Electric field magnitu
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PHYSICS SETTINGS Scalar Variables 1
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5 Click the General tab. From the P
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Optics and Photonics Models In this
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Model Definition The model is built
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Model Library path: RF_Module/Optic
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PHYSICS SETTINGS Scalar Variables S
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POSTPROCESSING AND VISUALIZATION By
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Model Definition The geometry is a
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2 In the list of application modes,
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Because the refractive index of GaA
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5 Click OK twice to see the followi
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Bandgap Analysis of a Photonic Crys
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a 2 a 3 × b1 = 2π----------------
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The five lowest bands for the (1, 1
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Modeling Using the Graphical User I
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Subdomain Settings 1 Open the Subdo
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3 Click the Parametric tab. Select
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3 Click OK to see the following plo
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fem.appl{1}.prop.analysis = 'harmon
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Model Definition The mode analysis
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2 Select the RF Module>Perpendicula
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4 On the Contour page, give Magneti
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includes only two independent param
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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
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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: 5 From the Options menu, select Sup
Page 327 and 328: efractive index 222, 254 resistance
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RF MODULE

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