Switched non-resonant antenna load
AssigneeMotorola, Inc.
InventorsPREM K. GANESHAN, VIJAY L. ASRANI, MICHAEL K. SIMCOE
Life of this patent
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Abstract
A mobile communication device (100) is operable in several physical configurations (202, 204, 302, 304) and has a main antenna (108). A non-resonant load (124) is selectively coupled to the main antenna during transmit time slots (808) to change the operating resonance of the antenna and reduce the field strength produced by the antenna at one or more select locations of the mobile communication device.
Claims20
A method of controlling operation of a switched non-resonant antenna element in a mobile communication device, the switched non-resonant antenna element disposed in proximity to a main antenna and being switchably coupled to an electrical reference, the method comprising:
- determining a configuration of the mobile communication device, wherein the mobile communication device is configurable in at least a first and a second physical configuration;
- when the mobile communication device is configured in the first physical configuration, leaving the non-resonant antenna element in a decoupled state from the electrical reference;
- and
- when the mobile communication device is configured in the second physical configuration, selectively coupling the non-resonant antenna element to the electrical reference through an impedance during a transmit slot time, and decoupling the non-resonant antenna element from the electrical reference during a receive time slot.
A method of configuring an antenna structure of a mobile communication device, comprising:
- determining a configuration of the mobile communication device, wherein the mobile communication device is configurable in at least a first and a second physical configuration;
- when the mobile communication device is configured in the first physical configuration, selecting a first non-resonant antenna element impedance configuration wherein a first non resonant load is coupled between an electrical reference and a main antenna during a transmit slot time, and decoupled from the electrical reference during a receive time slot;
- and
- when the mobile communication device is configured in the second physical configuration, selecting a second non-resonant antenna element impedance configuration wherein a second non resonant load is coupled between an electrical reference and the main antenna during a transmit slot time, and decoupled from the electrical reference during a receive time slot.
A mobile communication device, comprising:
- a first body portion and a second body portion, wherein the first and second body portions are moveable with respect to each such that the mobile communication device is operable in at least a first physical configuration and a second physical configuration;
- a main antenna;
- and
- at least one non-resonant impedance load which is switchably coupled between the main antenna and an electrical reference during a transmit slot time, and decoupled from the electrical reference during a receive time slot when the mobile communication device is configured in the first physical configuration.
Dependencies are inferred from the claim text.