# design

Design symmetric strip transmission line around given frequency

## Syntax

``sline = design(slineobj,frequency)``
``sline = design(___,Name,Value)``

## Description

````sline = design(slineobj,frequency)` designs an strip transmission line around the specified frequency with default 50 ohm reference impedance and `0.25` line length.```

example

````sline = design(___,Name,Value)` designs a strip transmission line with additional options specified by name-value pair arguments. NotePCB components designed using the `design` function resonates around the specified frequency with a 10 to 15% tolerance. ```

## Examples

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Design a strip transmission line around 3 GHz and with a characteristic impedance of 75 ohms.

```sline = design(stripLine, 3e9,'Z0',75); figure; show(sline); ```

Plot the s-parameters of this transmission line.

```spar = sparameters(sline,3e9); rfplot(spar)```

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` `Copyright 2020 The MathWorks, Inc.

## Input Arguments

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Strip transmission line, specified as a `stripLine` object.

Example: `sline = stripLine; design(sline,2e9)` designs a microstrip transmission line around a frequency of 2 GHz.

Resonant frequency of the transmission line, specified as a real positive scalar.

Example: `55e6`

Data Types: `double`

### Name-Value Arguments

Specify optional comma-separated pairs of `Name,Value` arguments. `Name` is the argument name and `Value` is the corresponding value. `Name` must appear inside quotes. You can specify several name and value pair arguments in any order as `Name1,Value1,...,NameN,ValueN`.

Example: `'Z0',2`

Characteristic impedance of the line in ohms, specified as the comma-separated pair consisting of `'Z0'` and a positive scalar.

Data Types: `double`

Length of the in terms of Lambda, specified as the comma-separated pair consisting of `'LineLength'` and a positive scalar.

Data Types: `double`

## Output Arguments

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Strip transmission line operating around the specified reference frequency, returned as a `stripLine` object.