Patch Antenna code?
#1
Finally i get some time to try tis python program before
i start translation to BASIC.
And i install python2.5 i think for windows..
also i tried few programs from examples and seems to me that work.
Ok then i copy /paste code for patch antenna
here:
Code:
import math
from math import cos, sin, sqrt, atan2, acos

def PatchFunction(thetaInDeg, phiInDeg, Freq, W, L, h, Er):
"""
Taken from Design_patchr
Calculates total E-field pattern for patch as a function of theta and phi
Patch is assumed to be resonating in the (TMx 010) mode.
E-field is parallel to x-axis

W......Width of patch (m)
L......Length of patch (m)
h......Substrate thickness (m)
Er.....Dielectric constant of substrate

Refrence C.A. Balanis 2nd Edition Page 745
"""
lamba = 3e8 / Freq

theta_in = math.radians(thetaInDeg)
phi_in = math.radians(phiInDeg)

ko = 2 * math.pi / lamba

xff, yff, zff = sph2cart1(999, theta_in, phi_in)
# Rotate coords 90 deg about x-axis to match array_utils coord system with coord system used in the model.
xffd = zff
yffd = xff
zffd = yff
r, thp, php = cart2sph1(xffd, yffd, zffd)
phi = php
theta = thp


if theta == 0:
theta = 1e-9 # Trap potential division by zero warning

if phi == 0:
phi = 1e-9

Ereff = ((Er + 1) / 2) + ((Er - 1) / 2) * (1 + 12 * (h / W)) ** -0.5 # Calculate effictive dielectric constant for microstrip line of width W on dielectric material of constant Er

F1 = (Ereff + 0.3) * (W / h + 0.264) # Calculate increase length dL of patch length L due to fringing fields at each end, giving total effective length Leff = L + 2*dL
F2 = (Ereff - 0.258) * (W / h + 0.8)
dL = h * 0.412 * (F1 / F2)

Leff = L + 2 * dL

Weff = W # Calculate effective width Weff for patch, uses standard Er value.
heff = h * sqrt(Er)

# Patch pattern function of theta and phi, note the theta and phi for the function are defined differently to theta_in and phi_in
Numtr2 = sin(ko * heff * cos(phi) / 2)
Demtr2 = (ko * heff * cos(phi)) / 2
Fphi = (Numtr2 / Demtr2) * cos((ko * Leff / 2) * sin(phi))

Numtr1 = sin((ko * heff / 2) * sin(theta))
Demtr1 = ((ko * heff / 2) * sin(theta))
Numtr1a = sin((ko * Weff / 2) * cos(theta))
Demtr1a = ((ko * Weff / 2) * cos(theta))
Ftheta = ((Numtr1 * Numtr1a) / (Demtr1 * Demtr1a)) * sin(theta)

# Due to groundplane, function is only valid for theta values : 0 < theta < 90 for all phi
# Modify pattern for theta values close to 90 to give smooth roll-off, standard model truncates H-plane at theta=90.
# PatEdgeSF has value=1 except at theta close to 90 where it drops (proportional to 1/x^2) to 0

rolloff_factor = 0.5 # 1=sharp, 0=softer
theta_in_deg = theta_in * 180 / math.pi # theta_in in Deg
F1 = 1 / (((rolloff_factor * (abs(theta_in_deg) - 90)) ** 2) + 0.001) # intermediate calc
PatEdgeSF = 1 / (F1 + 1) # Pattern scaling factor

UNF = 1.0006 # Unity normalisation factor for element pattern

if theta_in <= math.pi / 2:
Etot = Ftheta * Fphi * PatEdgeSF * UNF # Total pattern by pattern multiplication
else:
Etot = 0

return Etot

def sph2cart1(r, th, phi):
x = r * cos(phi) * sin(th)
y = r * sin(phi) * sin(th)
z = r * cos(th)

return x, y, z

def cart2sph1(x, y, z):
r = sqrt(x**2 + y**2 + z**2) + 1e-15
th = acos(z / r)
phi = atan2(y, x)

return r, th, phi
then anfter that i get stupid error about indent ???
what a heck is that what indent ??? one of reasons why I dont like python
program stuck because syntax error
look in screenshot...
and what is end of indent?
what i nightmare for me this time ...


Attached Files Thumbnail(s)

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#2
Why don't you translate it to a Basic say O2 that you are much more familiar? (Assuming you understand the meanings for all the parameters in the 3 functions defined above, otherwise why bother at all?)
B += x
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#3
Yes why,simply because i am not sure that this code show what I want
or what is supposed to be :
electric current density on metal patch surface...
so first I want to see Is work properly or not?

by the way maybe i can try function by function test in let say
Creative Basic first because tzhaz way is easyer than in o2
hmmm such a crap all that pyhon coding
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#4
....AND by the way
where is this show-man FIGOSDEV - mennonite ?
when he left forum?
and why ?
hmm maybe again no one likes him or something like that ..gee
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#5
AHH i see figosdev- easylangs-mennonite
spending time on net54 forum
COME HERE menn!
right now and show your knowlege about python for a real thing!
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