# PCB Design Strategies For Parallel Micro Strip Lines Based on Simulation Results

Several PCB design strategies for parallel micro strip lines are presented in this paper. The first one deals with dielectric constant, Loss tangent, and Coplanar microstrip routing. The second one discusses application-specific PCB trace design rules.

## Dielectric constant

The dielectric constant of parallel micro strip lines can be computed by solving a series of differential equations. The dielectric constant h varies as a function of the substrate height and width. The dielectric constant is an important property of thin films, so it is important to obtain an accurate value for the dielectric constant.

A simulation can be used to compute the dielectric constant. The simulation results can be compared to experimental measurements. However, these results are not perfect. Inaccuracies can lead to inaccurate Dk values. This results in a lower impedance and a slower transmission rate. In addition, the transmission delay for a short line is longer than for long lines.

Parallel micro strip lines are characterized by a dielectric substrate with a relative dielectric constant of 2.2 and a corresponding dielectric loss of 0.0009. A microstrip line contains two parallel microstrip lines with a coupling line. The inner side of the microstrip line is loaded with a CSRR structure. The SRR transfers the electric field to the four sides of the microstrip line by means of the coupling line.

## Loss tangent

To calculate the loss tangent of parallel micro strip lines, we use a computer simulation model. We use the loss tangent for a 30 mm-long strip line. Then, we use the length of the additional strip line to satisfy the connector spacing. This results in a loss tangent of 0.0007 deg.

The simulation results were very accurate and showed a good agreement with the experimental results. The simulation results indicated that the loss tangent of a parallel micro strip line is between 0.05 mm. This result was verified by further calculations. The loss tangent is an estimation of the energy absorbed by the strip. It depends on the resonant frequency.

Using this model, we can calculate the resonant frequency, loss tangent, and shunt frequency. We can also determine the critical cover height of a microstrip. This is a value that minimizes the influence of cover height on the line parameters. The computed output parameters are listed in the Line Types section of the guide. The program is very easy to use, allowing you to modify input parameters quickly and accurately. It has cursor controls, tuning shortcuts, and hot-keys to assist you in changing the parameters of the simulation model.

## Coplanar microstrip routing

Coplanar microstrip routing can be performed using a computer simulation tool. The simulation can be used to optimize a design or to check for errors. For example, a simulation can determine whether a solder mask was present or not. Also, it can show the impact of etchback, which reduces coupling between coplanar trace and ground plane and increases impedance.

In order to make the correct coplanar microstrip routing, one must first compute the characteristic impedance between the coplanar waveguide and ground. This can be done with an active calculator or using the equations at the bottom of the page. The Transmission Line Design Handbook recommends a track width of “a” plus the number of gaps, “b.” The component side ground should be wider than b to avoid the effects of EMI.

To get accurate simulation results, one should use a good coplanar waveguide calculator. The best ones include a coplanar waveguide calculator that accounts for dispersion. This factor determines the loss and speed of different frequencies. Furthermore, one must account for copper roughness, which adds to the interconnect impedance. The best calculator will account for all these factors simultaneously.

## Application-specific PCB trace design rules

The electrical field pattern on a PCB can be designed on multiple layers, single, double, or multi-layered. This type of PCB design is becoming more common, especially for SoC applications. In this design, the signal trace is routed on the inner layers of the PCB. The signal trace is backed by ground planes to minimize the characteristic impedance.

The simulated microstrip lines are designed with different cut-out widths. The reference 50 O microstrip has no cut-out compensation, while the other two have a discontinuity. The width-varying cut-out is used for impedance compensation, and the cut-out width is varied through linear parametric analysis. The cut-out width is 0.674 to 2.022 mm with a precision of 0.1685 mm.

The high integration requirements of parallel microstrip lines are often accompanied by crosstalk. To combat this problem, researchers have been exploring techniques to minimize crosstalk. They have studied the formation principles of crosstalk and identified factors that affect it. One of the most effective methods is to increase the spacing between transmission lines. However, this method uses limited wiring space and is not compatible with the direction of integration.

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