Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Reexamination Certificate
2007-02-13
2008-11-04
Dinh, Trinh V (Department: 2821)
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
C343S770000, C455S115100, C455S562100, C342S368000
Reexamination Certificate
active
07446728
ABSTRACT:
An antenna system of any three dimension (3D) geometry and method for constructing said system with an array of basic antenna elements are described. An antenna system beam pattern is specified. The basic antenna element parameters including basic pattern and actual spacing location are measured. The measured parameterized array elements are injected in an exact array frame formula for any 3D array systems to form an array frame. Array calibration is performed by evaluating a dual frame to the array frame and the array control weights are determined based on the dual array frame and the specified system beam pattern. The antenna system and a software tool is then constructed in accordance with the antenna control weights. The present invention enables the high precision beam synthesis with high quality beams for array of any geometry. The present invention is capable of taking account various factors in antenna constructions together in a one-step approach. These factors include, for instance, mutual coupling, element spacing variation, element gain and basic pattern variation, antenna cable and feeds length variation (reflected in phase differences).
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