STK Antenna Models

Rectangular Antenna Pattern

A rectangular shaped antenna where the main lobe occurs within the range of Phi and Theta and the side lobe occurs everywhere else.

This antenna uses a rectangular coordinate system.

Parameter Description
Design Frequency

This is the frequency of the antenna. The antenna design frequency is independent of the operational frequency of a transmitter, receiver, or radar. Changing the frequency of a transmitter, receiver, or radar does not update an embedded antenna's design frequency, nor vice versa. The design frequency is solely used at antenna configuration time to compute the antenna size from its max gain or beamwidth settings. A mismatch between signal frequency and antenna design frequency typically causes performance degradation.

Main-lobe Gain

The maximum gain. If nothing is entered here, maximum gain defaults to zero.

Phi Angle Twice the angle in the Y direction off the boresight, where the boresight is the Z axis. (Range is 0.001 to 90 deg.)
Theta Angle Twice the angle in the X direction off the boresight, where the boresight is the Z axis. (Range is 0.001 to 90 deg.)
Side-lobe Gain The computed gain of the antenna outside the main lobe beamwidth. The value is absolute, not relative to the main-lobe gain.