GPS_helical_antenna_designer.ps1

# Author: Robert J Lambert
# Revision: 0.1.0

param(
    [array]$val,       #Units
    [switch]$waveleng, #m
    [switch]$freq,     #1/s
    [switch]$da,       #10
    [switch]$hecto,    #10^2
    [switch]$kilo,     #10^3
    [switch]$Mega,     #10^6
    [switch]$giga,     #10^9
    [switch]$tera,     #10^12
    [switch]$peta,     #10^15
    [switch]$exa,      #10^18
    [uint32]$n
        )

function wrongvars{
write-host "Wrong Parameters"
break
}

if(($waveleng -eq $null) -and ($freq -eq $null)){
wrongvars
}

$anntenna= @()
$y = $null

function siUnitConvert($var){
  if($Da){$f= $var*10}
  if($Hecto){$f= $var*100}
  if($kilo){$f= $var*1000}
  if($Mega){$f= $var*1000000}
  if($Giga){$f= $var*1000000000}
  if($Tera){$f= $var*1000000000000}
  if($Peta){$f= $var*1000000000000000}
  if($Exa){$f= $var*1000000000000000000}
  $f
}

if($freq){

 $val | %{  
    
    $anntenna += New-Object -TypeName psobject -Property @{
       
        freq = siunit($_)
    
        freqExpNegOne = 1/(siunit($_))
    
        lambda = 299792458*(1/(siunit($_)))#m/s*s
    
        diameter = (299792458*(1/(siunit($_))))/3.14159 #Diameter is close to a C/pi  where 1*lambda -eq C
        
        #inequalites roughly determine the operating bandwidth of the helix antenna  3/4*lambda -lt C -gt 3/4*lambda

        period = 0.22 * 299792458*(1/(siunit($_)))
        
        minGroundPlaneLength = (0.8*299792458*(1/(siunit($_))))

        #D is gt or eq to Gdelta
        
        wireGuage = 0.11 * 299792458*(1/(siunit($_))) #wiregage

        groundPlaneGap = 0.02* 299792458*(1/(siunit($_)))

        coils = $n
        
        length = $n * (0.22 * 299792458*(1/(siunit($_))))

        gain = 6.2*(299792458*299792458)*$n #The gain of the helix antenna can be approximated by:

        Impedance = 140 * (299792458*(1/(siunit($_))))/(299792458*(1/(siunit($_))))

        }
   }
   
}else{$lambda = $val}

if($anntenna.length -gt 0){
    
    $anntenna
}


<#

.SYNOPSIS

Field Expedient Helix Antenna Metrics:
    1.  one turn is approximately λ
    2.   the antenna radiates in the axial mode


.DESCRIPTION

  D diameter of he
  S intervals between turns
  Axial length(nS)
  d diameter of conductor in helix
  G ground plane diameter
  n number of turns

.PARAMETER val

  The value that is the metric for either Hz or lambda wave lenght

.EXAMPLE
  PS> & .\Antenna.ps1 -val 1574 -freq -Mega


The Road goes ever on and on 
Out from the door where it began.
Now far ahead the Road has gone,
Let others follow it who can!
Let them a journey new begin,
But I at last with weary feet
Will turn towards the lighted inn,
My evening-rest and sleep to meet. 

— J. R. R. Tolkien

#>