Aperture Antenna Calculator | |
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Electric Current Density (j) | |

Electric Current Density for 1st element (J1) | |

Wave Length (λ) | |

Radius of Circular Aperture (a) | |

Distance of the observation point from the Origin (r) | |

Coordinate Angle 1 (θ) | |

Coordinate Angle 2 (φ) | |

Electric Field of coordinate Angle1 (Eθ): | {{angle1Result()}} |

Electric Field of coordinate Angle2 (Eφ): | {{angle2Result()}} |

## Formula

### Eθ= [ ( j*k *a2*E0*e-jkr ) / r ] * Sin φ [ ( J1*k*a*Sinθ) / k*a * Sinθ]

### φ = [ ( j*k*a2*E0*e-jkr ) / r ] * (Cosθ*Cosφ) [(J1*k*a*Sinθ) / k*a*Sinθ]

Where,

k = 2 π / λ

λ = Wave Length

E0 = 8.8541878176 ×10-12F/m (electric constant)

θ = Coordinate Angle 1

φ = Coordinate Angle 2

a = Radius of Circular Aperture

r = Distance of the observation point from the Origin

j = Electric Current Density

J1 = Electric Current Density for 1st element