Hemispheric Antenna Pattern

The Hemispherical antenna type provides a built-in model antenna gain pattern covering half of the hemisphere along the boresight. An example of this type of antenna is the common, commercially available GPS receiver antenna.

This antenna uses a polar coordinate system.

Field	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	Read-only field displaying the total gain of the antenna in dB or the selected units.
Efficiency	The efficiency factor of the antenna, varying from 0 to 100 percent. Since no antenna is perfect, the efficiency factor allows you to specify the degradation in performance. Typical values fall in the range of 70 to 90 percent.

Field

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

Read-only field displaying the total gain of the antenna in dB or the selected units.

Efficiency

The efficiency factor of the antenna, varying from 0 to 100 percent. Since no antenna is perfect, the efficiency factor allows you to specify the degradation in performance. Typical values fall in the range of 70 to 90 percent.