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5/29レポート課題

Python

Last updated at 2018-06-04Posted at 2018-05-29

課題1

# 送信電力(w)
Pt = 10000
# 送信アンテナ利得
Gt = 4
# 受信アンテナ利得
Gr = 10
# 距離(m)
d = 40000
# 周波数(MHz)
f = 540 

# λ
lamda = 300 / f

# 実行面積
Ar = (Gr * (lamda ** 2))/ (4* np.pi)
# 受信電力
Pr = (Pt*Gt*Ar)/(4*np.pi*(d**2))

答え
4.886245353122001e-07

課題2

# 波動インピーダンス
Z=120 * np.pi
# 電力束密度
Pd = Pt * Gt /(4 * np.pi * d **2)
# 電界強度(自由空間)
Eo = np.sqrt(Z * Pd)

答え
0.027386127875258306

課題3

# 送信アンテナ高さ
h1 = 600
# 受信アンテナ高さ
h2 = 120
# 電界強度(ハイトパターン考慮)
E = 2 * Eo * np.sin(2*np.pi*h1*h2/(lamda*d))

答え
0.05466417521532467

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