# feedCurrent

Calculate current at feed for antenna or array

## Syntax

``feedCurrent(obj,frequency)``

## Description

example

````feedCurrent(obj,frequency)` calculates the current at the feed for an antenna or array object at a specified frequency. The feed current when multiplied by the antenna impedance gives the voltage across the antenna.```

## Examples

collapse all

Excite a monopole antenna using plane wave. Calculate the feed current at 75 MHz.

```h = planeWaveExcitation('Element',monopole, 'Direction',[1 0 0]) cur = feedCurrent(h,75e6) ```
```h = planeWaveExcitation with properties: Element: [1×1 monopole] Direction: [1 0 0] Polarization: [0 0 1] cur = 0.0132 - 0.0133i ```

Calculate the feed current of a rounded-bowtie designed for operation at 2.4 GHz.

```b = design(bowtieRounded,2.4e9); If = feedCurrent(b,2.4e9)```
```If = 0.0294 - 0.0012i ```

Calculate the feed current of a dipole antenna designed for operation at 70 MHz and 75 MHz.

`feedCurrent(dipole, [75e6, 70e6])`
```ans = 1×2 complex 0.0136 + 0.0001i 0.0089 - 0.0034i ```

## Input Arguments

collapse all

Antenna or array object, specified as an object handle.

Frequency to calculate feed current, specified as a scalar integer in Hz.