Coordinate System

In spherical coordinate system when θ is constant, the shape of the surface is

• Sphere

• Sheet

• Cone

• Cylinder

The coordinate system that can be used in the measurement of antenna radiation pattern is

• Cylindrical

• Cartesian

• Spherical

• Geographic

• z

• z cosΦ+ (x+y) sin Φ

• -z sinΦ+ (x+y) cosΦ

• zero

Where surfaces ρ=2, z=1 intersect is

• an infinite plane

• a circle

• a semi-infinite plane

• a cylinder

a_x . a_ρ =

• cos Φ

• sin Φ

• -cos Φ

• -sin Φ