| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost, steerable, phased array antenna suitable for use in wireless fidelity and other radio telecommunications networks, in particular multi-hop ad hoc networks, and to also provide an antenna assembly that includes a plurality of linear phased array antennas fed by feed circuit. SOLUTION: The corporate feeds are implemented as parallel wire transmission lines, such as coaxials, striplines, microstrips, or coplanar waveguide (CPW) transmission lines. Selected branches of a corporate feed network include transmission line phase shifters oriented and sized so as to allow a high-permittivity dielectric element to control phase shifting. Thus, the feed circuit forms a phase shifting feed, whose phase shift is controllable. Phase shifting can be controlled electromechanically, by controlling the space between the high-permittivity dielectric element and the phase shifting branches of the corporate feed, or by electrically controlling the permittivity of the high-permittivity dielectric element. COPYRIGHT: (C)2005,JPO&NCIPI
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