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charge

Charge distribution on metal or dielectric antenna or array surface

Syntax

charge(object,frequency)
c = charge(object,frequency)
charge(object,frequency,'dielectric')
c = charge(object,frequency,'dielectric')

Description

example

charge(object,frequency) calculates and plots the absolute value of the charge on the surface of an antenna or array object surface at a specified frequency.

example

c = charge(object,frequency) returns a vector of charges in C/m on the surface of an antenna or array object, at a specified frequency.

example

charge(object,frequency,'dielectric') calculates and plots the absolute value of charge at a specified frequency value on the dielectric face of the antenna or array.

c = charge(object,frequency,'dielectric') returns the x, y, z components of the charge on the dielectric surface of an antenna or array object, at a specified frequency.

Examples

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Calculate and plot the charge distribution on a bowtieTriangular antenna at 70MHz frequency.

h = bowtieTriangular;
charge (h, 70e6);

Calculate charge distribution of linear array at 70 MHz frequency.

h = linearArray;
h.NumElements = 4;
C = charge(h,70e6);

Create a microstrip patch antenna using 'FR4' as the dielectric substrate.

d = dielectric('FR4');
pm = patchMicrostrip('Length',75e-3, 'Width',37e-3,                 ...
        'GroundPlaneLength',120e-3, 'GroundPlaneWidth',120e-3, ...
        'Substrate',d)
show(pm)
pm = 

  patchMicrostrip with properties:

               Length: 0.0750
                Width: 0.0370
               Height: 0.0060
            Substrate: [1x1 dielectric]
    GroundPlaneLength: 0.1200
     GroundPlaneWidth: 0.1200
    PatchCenterOffset: [0 0]
           FeedOffset: [-0.0187 0]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

Plot the charge distribution on the antenna at a frequency of 1.67 GHz.

figure
charge(pm,1.67e9,'dielectric')

Input Arguments

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Antenna or array object, specified as a scalar handle.

Frequency used to calculate charge distribution, specified as a scalar in Hz.

Example: 70e6

Data Types: double

Output Arguments

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Complex charges, returned as a 1xn vector in C/m. This value is calculated on every triangle mesh or every dielectric tetrahedron face on the surface of an antenna or array. of antenna or array.

See Also

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Introduced in R2015a

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