 淘宝官方店 推荐课程 在线工具 联系方式 关于我们 |
|
|
微波射频仿真设计 |
|
| 淘宝官方店 推荐课程 在线工具 联系方式 关于我们 |
|
|
微波射频仿真设计 |
|
| 首页 >> Ansoft Designer >> Ansoft Designer在线帮助文档 |
|
Transmission Line Designer > Edge-Coupled Symmetric Microstrip Transmission Lines![[spacer]](1p.gif){kind=small}
Synthesis and AnalysisTwo options exist for the synthesis of coupled microstrip transmission lines: — Specify impedance, Z0, and coupling coefficient, K. — Specify even-mode impedance, Ze, and odd-mode impedance, Zo. • The substrate parameters H, and ER must be entered prior to clicking the Synthesis button. The width of the microstrip lines, W, and the spacing between them, S, will be computed. Also, the alternate electrical option set will be computed (e.g., if Z0 and K are entered, Ze and Zo will be computed). • For analysis, the parameters W, S, H, and ER must be entered prior to clicking the Analysis button. The electrical properties, Z0, K, Zo, and Ze will be computed. The frequency will be used if entered; otherwise, 0 Hz will be used in the calculation. • Conversion from electrical length, E, to physical length, P, can be performed by entering values for E and the frequency, Frequency. Click Synthesis to compute P. Similarly, to convert from physical length to electrical length, enter values for P and Frequency, and click Analysis to compute E.
Dielectric SubstratesA dielectric substrate is defined by the parameters H, ER, and TAND. The substrate is assumed lossless unless TAND is specified and greater than zero.
Conductor Metallization• Conductor specification is performed in the Metallization control group. If the conductor is not specified, the conductor loss is zero and no thickness corrections are made to the propagation characteristics. Up to three conductors of different metals and thicknesses can be specified. • Metallization rms surface roughness, RGH, can be specified for additional conductor losses due to imperfect metal surfaces. RGH is specified in terms of rms variation from an ideal flat surface.
Sweep OptionsParameters that can be swept for the coupled microstrip transmission lines are: Frequency The order shown is the order used to generate output data when multiple parameters are swept simultaneously. Refer to the Sweep Entries section for further information.
LimitationsTo maintain accuracy, the following limitations should be followed: 0.01 ≤ W/H ≤ 100 1 ≤ εr ≤ 128
ExampleTo select the coupled microstrip medium, select TRL on the Product menu, click Microstrip, and click CPL. Set the units to mm and GHz. We will use the following parameters for synthesizing a 6-dB coupler at 10 GHz: Impedance, Z0: 50 ohms Coupling, K: 6 dB Frequency: 10 GHz Substrate thickness, H: 0.635 mm Dielectric constant, ER: 9.8 Metal: Cu 0.01 mm
Click the Synthesis button to determine the coupler parameters: Width, W: 0.369 mm Spacing, S: 0.055 mm Odd-mode impedance, Zo: 28.82 ohms Odd-mode Keff: 5.46 Even-mode impedance, Ze: 86.74 ohms Even-mode Keff: 7.08
To specify a 1/4 wavelength line, enter: Electrical length, E: 90
Click Synthesis again to determine the physical length: Physical length, P: 2.99 mm
To perform a sweep analysis of the conductor spacing, type in: Spacing, S: 0.03, 0.06, 0.01 mm by typing (0.03 0.06 0.01); the space bar will insert a comma and indicate that a sweep is desired. Click Analysis to get the following results:
Coupled Lines in Microstrip H = 0.635mm ER = 9.80 TAND = 0.00000 T/H = 0.0157
Loss (dB/mm ) Freq S/H W/H ZE ZO KE KO Even Mode Odd Mode ghz Ohms Ohms Cond Diel Cond Diel
10.0 0.047 0.581 88.0 24.8 7.020 5.441 0.0046 0.0000 0.0165 0.0000
10.0 0.063 0.581 87.5 26.6 7.040 5.446 0.0046 0.0000 0.0154 0.0000
10.0 0.079 0.581 87.0 28.1 7.056 5.450 0.0047 0.0000 0.0145 0.0000
10.0 0.094 0.581 86.5 29.4 7.070 5.456 0.0047 0.0000 0.0139 0.0000
You can also sweep frequency and width, W, to get analysis results as a function of these parameters.
HFSS视频教程 ADS视频教程 CST视频教程 Ansoft Designer 中文教程 |
|
Copyright © 2006 - 2013 微波EDA网, All Rights Reserved 业务联系：mweda@163.com |
|
Ansoft Designer / Ansys Designer 在线帮助文档：
