Use the Basic Definition page for a receiver, transmitter, radar, or antenna object to select an antenna model type from the Component Browser. Then you can define and orient the type selected. All types of radars and some types of receivers and transmitters can also link to an antenna object, rather than embed their own individual copy. (For information on how to link to an antenna that resides on a sensor, click here).
Refer to this website for free interactive tutorials that may help you better understand antenna properties: http://www.analyzemath.com/antennas.html.
When you select an embedded antenna component, the component definition is copied into the transmitter, receiver, or radar object. Further changes made to the transmitter, receiver, or radar object will not affect the original component.
When you select a linked antenna object, the antenna definition is available only for viewing with the transmitter, receiver, or radar object. To modify the linked antenna's properties, double-click it in the Object Browser to access its property pages. Any modifications that you make will affect all transmitter, receiver, and radar objects linked to the antenna object.
If you are repeatedly modeling and modifying the same physical antenna, use a linked antenna object to save keystrokes and reduce input errors.
To model actual, real-world configurations as closely as possible, STK anticipates that the antenna object will be placed on the sensor, so it can inherit sensor properties such as location and pointing. Conversely, radar, receiver, or transmitter objects that link to this antenna must be on the sensor's parent object, not on the sensor itself. It is helpful in this context, to think of the sensor as the gimbal for the antenna. Yet, the radar, receiver, or transmitter represents the electronic components that do not need pointing and whose location does not affect RF properties. While STK allows a radar, receiver, or transmitter object to be placed directly on a sensor, the use of embedded antennas is the only available option in this case.
STK Antenna Models
STK provides the following antenna models. In addition, you can define your own antenna models using the Component Browser.
- Bessel Aperture Circular Antenna
- Bessel Envelope Aperture Circular Antenna
- Cosecant Squared Pattern Antennas
- Cosine Aperture Circular Antenna
- Cosine Aperture Rectangular Antenna
- Cosine Pedestal Aperture Circular Antenna
- Cosine Pedestal Aperture Rectangular Antenna
- Cosine Squared Aperture Circular Antenna
- Cosine Squared Aperture Rectangular Antenna
- Cosine Squared Pedestal Aperture Circular Antenna
- Cosine Squared Pedestal Aperture Rectangular Antenna
- Dipole Antenna Pattern
- GPS FRPA Antenna Pattern
- GPS Global Antenna Pattern
- Gaussian Antenna
- Gaussian Optical Antenna Pattern
- Helix Antenna Pattern
- Hemispheric Antenna Pattern
- ITU-R BO1213 Co-Polar Antenna
- ITU-R BO1213 Cross-Polar Antenna
- ITU-R F1245 Antenna
- ITU-R S1528 1.2 Circular Antenna
- ITU-R S1528 1.2 Rectangular Antenna
- ITU-R S1528 1.3 Circular Antenna
- ITU-R S465 Antenna
- ITU-R S580 Antenna
- ITU-R S672 Circular Antenna
- ITU-R S672 Rectangular Antenna
- ITU-R S731 Antenna
- Isotropic Antenna Pattern
- Parabolic Antenna
- Pencil Beam Antenna
- Phased Array Antenna
- Rectangular Antenna Pattern
- Simple Optical Antenna Pattern
- Sinc Integer Power Aperture Circular Antenna
- Sinc Integer Power Aperture Rectangular Antenna
- Sinc Real Power Aperture Circular Antenna
- Sinc Real Power Aperture Rectangular Antenna
- Square Horn Antenna
- Uniform Aperture Circular Antenna
- Uniform Aperture Rectangular Antenna