File:LA beam.png
Summary
| Description |
Русский: Диаграмма направленности для линейной антенной решетки (N=25) 2,4 ГГц |
| Date | |
| Source | Own work |
| Author | Kirlf |
Licensing
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| Description |
Русский: Диаграмма направленности построена в соответствии с Драбкин А., Зузенко В., Кислов А. Антенно-фидерные устройства. - 1974. - с. 399-409
Category:Antennas |
| Date | |
| Source | Own work |
| Author | Kirlf |
| PNG development | |
| Source code | Python codeimport numpy as np
import math
import matplotlib.pyplot as plt
n = 25 # количество элементов АФАР
wavelength = (3e8)/(2.4e9) # длина волны для несущей частоты 2.4 ГГц
d = wavelength / 2
k = 2*np.pi/wavelength
thetaM = 0*(np.pi/180)
thetas = np.arange(-90,91)*(np.pi/180)
for idx, item in enumerate(thetas):
if item == 0:
thetas[idx] = 0.001
F = np.zeros((len(thetas),1))
for idx, theta in enumerate(thetas):
num = np.sin(n*k*d*(np.sin(theta) - np.sin(thetaM))/2)
denum = np.sin(k*d*(np.sin(theta) - np.sin(thetaM))/2)
F[idx] = (1 /n)*(num/denum)
if math.isnan(F[idx]) == True:
F[idx] = 1
plt.figure(figsize=(10, 5), dpi=150)
plt.plot(thetas*(180/np.pi), F)
plt.title("Азимут")
plt.xlabel('Градусы')
plt.ylabel('F(θ)')
plt.grid()
plt.savefig('LA')
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