CST – Computer Simulation Technology

Concentric Circular Array: Scan Angle and Beamwidth | Antenna Magus

This synthesis algorithm will design a concentric circular array (made up of multiple concentric rings of elements) to provide a main beam with a specified beamwidth in a given azimuthal and elevation direction. The array is always designed so that the elements are arranged in the x-y plane, centered around the z-axis. When isotropic array elements are assumed, the synthesized radiation pattern of this array will be a mirror-image around the x-y plane.

An example of a 3D pattern for this array.

An azimuthal and elevation direction for the main beam may be specified together with the required beam width of the main beam. The angles are as defined below. When the array radiation pattern is synthesized with isotropic element patterns, the radiation pattern will always be mirrored around the xy-plane....

Azimuthal (Φ) and elevation (θ) angle definition.

The excitation distribution taper may be chosen as uniform (all elements excited uniformly) or based on a Taylor distribution. When using a Taylor distribution, the level of the side-lobes and/or the number of sidelobes to be kept at this level may be chosen, while the Uniform taper provides no sidelobe level control.

More information about how the array synthesis tool should be used can be found in ‘Antenna Array Synthesis in Antenna Magus’  and in ‘Help: How do I use the Array Synthesis tool?’ (located in the Antenna Magus information browser). The latter article also describes the different excitation tapers in more detail, and provides references for further research.  

 

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