English Alphabet

A Vector potential (Weber/meter, Wb/m)
Ae Effective area of a receiving antenna
A(θ) Array pattern function for omnidirectional antenna
a Dimension of a rectangular microstrip patch separating the radiating edges
a Parameter used in calculating specific rain attenuation (Equation 8.10)
aθ, aθ, az Unit vectors in spherical coordinates
ax, ay, az Unit vectors in Cartesian coordinates
B Magnetic flux density (Tesla)
Be Constant magnetic flux density due to the earth’s magnetic field
BW 3-dB beamwidth ...

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