numSummationTerms

Change number of summation terms for calculating periodic Green's function

Syntax

numSummationTerms(array,num)

Description

numSummationTerms(array,num) changes the number of summation terms used to calculate periodic Green's function of the infinite array. This method calculates $$2*num+1$$ of the periodic Green's function. The summation is carried out from –num to +num. A higher number of terms results in better accuracy but increases the overall computation time.

Examples

Change Number of Summation Terms in Infinite Array

Create an infinite array with the scan elevation at 45 degrees. Calculate the scan impedance. By default, the number of summation terms used is 21.

h = infiniteArray(ScanElevation=45);
s = impedance(h,1e9)

s = 
85.0254 +71.0104i

Change the number of summation terms to 51. Calculate the scan impedance again.

numSummationTerms(h,25)
s = impedance(h,1e9)

s = 
85.1711 +71.0443i

Change the number of terms to 101. Increasing the number of summation terms results in a more accurate scan impedance. However, the time required to calculate the scan impedance increases.

numSummationTerms(h,50)
s = impedance(h,1e9)

s = 
85.2162 +71.0490i

Input Arguments

array — Infinite array

infiniteArray object

Infinite array, specified as an infiniteArray object.

Example: infiniteArray(ScanElevation=45)

num — Number to calculate summation terms

10 (default) | scalar

Number to calculate summation terms, specified as a scalar. The summation is carried out from –num to +num.

Example: 50

Version History

Introduced in R2015b