# getZ0

Calculate characteristic impedance of transmission line object

## Syntax

``z0 = getZ0(transmissionline,frequency)``

## Description

example

````z0 = getZ0(transmissionline,frequency)` returns the characteristic impedance `z0`, of a transmission line object at the given frequency.```

## Examples

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Create a coaxial transmission line with these specifications:

• Outside diameter of the conductor : 0.45 mm,

• Inside diameter of the conductor : 1.47 mm

• Conductor conductivity : 5.8e7

• Relative permittivity of polyimide dielectric : 3.4

```coaxialtxline = txlineCoaxial('OuterRadius',1.47e-3,'InnerRadius',0.45e-3,... 'EpsilonR',3.4,'SigmaCond',5.8e7)```
```coaxialtxline = txlineCoaxial: Coaxial element Name: 'Coaxial' OuterRadius: 0.0015 InnerRadius: 4.5000e-04 MuR: 1 EpsilonR: 3.4000 LossTangent: 0 SigmaCond: 58000000 LineLength: 0.0100 Termination: 'NotApplicable' StubMode: 'NotAStub' NumPorts: 2 Terminals: {'p1+' 'p2+' 'p1-' 'p2-'} ```

Calculate the characteristic impedance of the transmission line.

`charimpedance = getZ0(coaxialtxline,6e9)`
```charimpedance = 38.4927 - 0.0201i ```

## Input Arguments

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Frequency to calculate noise figure, specified as a positive scalar in hertz.

## Output Arguments

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Characteristic impedance of the transmission line, returned as a complex scalar.

Data Types: `double`