Patent ID: 7379708

Claim:
A mobile receiver apparatus comprising: a directivity variable antenna including a plurality of antenna elements; an antenna controller connected with the directivity variable antenna for controlling the directivity of said antenna; and an optimum directivity calculator coupled to the antenna controller for calculating a pattern for the directivity of the antenna by determining (1) whether to align the plurality of antenna elements in one direction so that antenna directivity is in said direction and (2) whether to align at least one of the plurality of antenna elements in a direction different from at least another one of the plurality of antenna elements so that antenna directivity is omni directional; wherein the optimum directivity calculator includes: a current position detector for detecting the current position of the mobile receiver apparatus; and a geographic data storage for storing geographical features which have respective height components in proximity to the current position of the mobile receiver apparatus, at least one stored geographical feature including a height component having a height different than a height of the mobile receiver apparatus; and the pattern for the directivity of the antenna is further calculated by a combination of the current position of the mobile receiver apparatus and the height component of the at least one stored geographical feature.