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Calculate current at feed for antenna or array



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


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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 = 0.0297 - 0.0003i

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

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Antenna or array object, specified as an object.

Frequency to calculate feed current, specified as a scalar integer in Hz or a vector with each element specified in Hz.

Version History

Introduced in R2017a

See Also