# correlation

Correlation coefficient between two antennas in array

## Description

example

correlation(array,frequency,elem1,elem2,z0) calculates and plots the correlation coefficient between two antenna elements, elem1 and elem2 of an array. The correlation values are calculated for a specified frequency and impedance and for a specified impedance z0.

example

rho = correlation(array,frequency,elem1,elem2,z0) returns the correlation coefficient between two antenna elements, elem1 and elem2 of an array.

## Examples

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Plot the correlation between 1 and 2 antenna elements in a default linear array over a frequency range of 50MHz to 100MHz.

h = linearArray;
correlation (h,50e6:1e6:100e6,1,2);

Calculate correlation coefficient of default rectangular array at a frequency range of 50MHz to 100MHz.

h = rectangularArray;
rho = correlation (h, 50e6:1e6:100e6, 1, 2)
rho = 51×1

0.1406
0.1110
0.0812
0.0510
0.0200
0.0119
0.0448
0.0782
0.1114
0.1427
⋮

## Input Arguments

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Array object, specified as a scalar.

Frequency range used to calculate correlation, specified as a vector in Hz.

Example: 50e6:1e6:100e6

Data Types: double

Antenna elements in an array, specified as a scalar.

Reference impedance, specified as a scalar in ohms.

Example: 70

Data Types: double

## Output Arguments

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Correlation coefficient between two antenna elements of an array, returned as a vector.

## References

[1] S. Blanch, J. Romeu, and I. Corbella. Exact representation of antenna system diversity performance from input parameter description. Electron. Lett., vol. 39, pp. 705-707, May 2003.

## Version History

Introduced in R2015a