Abstract: A computer card data receiver (10) includes a housing (14) having a top planar surface (16) and a bottom planar surface (18) and a thin profile suited to fit within a recessed data interface port (32) of an external computer (30). An antenna (12) is coupled to the top planar surface (16) of the housing (14) for intercepting transmitted selective call address signals and data associated therewith. The antenna (12) is rotatable between a first antenna position (12A) and a second antenna position (12B), the first antenna position (12A) being selected when the housing (14) is removed from the recessed data interface port (32), and the second antenna position (12B) being selected when the housing (14) is inserted into the recessed data interface port (32). A receiver (40) is enclosed within the housing (14) and receives and detects the intercepted selective call address signals and data associated therewith.

Abstract: An antenna system for a communication receiver (100) which has an internal antenna (200) and which is coupled to a portable computer (104) to deliver received data messages thereto comprises a resonant loop antenna (16) magnetically coupled to the internal antenna (200) of the communication receiver (100), and a resonant wireframe shield (18, 40) which is coupled to the resonant loop antenna (16) and oriented perpendicular thereto. The resonant wireframe shield (18, 40) shields the communication receiver (100) from an electrical interference signal generated by the portable computer (104).