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5/29レポート課題

Last updated at Posted 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 

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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