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AssigneeFox Broadcasting Company, LLC
InventorsGeoffrey James, Francis Cooray, Trevor Bird, John O'Sullivan, R. Evans Wetmore
Estimating the term…
An irregular arrangement of slots in a cylindrical slot-array antenna is used to control the radiation pattern, achieving a variation of gain and/or beam tilt with azimuth. A design methodology for slot-array antennas achieves efficient and rapid optimization by minimizing the number of degrees of freedom and the number of significant mutual-coupling interactions. A useful range of designs is achieved by requiring that the slots are arranged in bays and that all slots, and their probes, are identical. Bays are separated by approximately a wavelength and, therefore, mutual coupling between bays can be ignored. Although the antenna slots are physically grouped into bays, the analytical approach groups the slots into paths defined by a simultaneous variation in z and φ coordinates of the slots.
A slot array antenna having a shaped radiation pattern comprising a cylindrical waveguide defined by z,φ coordinates with a plurality of slots arranged in an irregular pattern, thereby producing a non-uniform radiation pattern wherein the slots are arranged to produce a radiation pattern with beam tilt that varies as a function of azimuth.
A slot array antenna having a shaped radiation pattern comprising a cylindrical waveguide defined by z, φ coordinates with a plurality of non-uniform slots, thereby producing a non-uniform radiation pattern.
A method of estimating a radiation pattern of a slot-array antenna comprising:
A method of designing a slot-array antenna comprising:
A method of calculating coupling interactions between radiating elements in an array comprising:
Dependencies are inferred from the claim text.