Abstract:
A dual autodiplexing antenna (300) redirects power flow (303) from an unloaded antenna to a loaded antenna, thereby improving communication performance under loaded conditions. The dual autodiplexing antenna (300) includes a first antenna (101) disposed at a first end (103) of a portable two-way communication device (100). A second antenna (102) is disposed at the distal end (104) of the portable two-way communication device (100). The first antenna (101) and second antenna (102) are coupled to a transceiver (107) by a first transmission line matching circuit (201) and a second transmission line matching circuit (202), respectively. In one embodiment, the first antenna (101) is configured to primarily operate in a first bandwidth, while the second antenna (102) is configured to primarily operate in a second bandwidth. When one of the first antenna (101) or second antenna (102) is loaded, power flow (303) is redirected to the lesser loaded antenna.
Abstract:
A system (115) provides enhanced radiation performance for a communication device (10). The system (115) includes one or more shields (90) for directing radio frequency energy. The one or more shields (90) are isolated from the radio frequency currents on the ground plane of the communications device (10). The system (115) further includes a display bezel (60) also isolated from the radio frequency currents on the ground plane. The system (115) further includes one or more impedance blocks electrically connected between the display bezel (60) and a printed circuit board (25) for providing a direct current ground path between the display bezel (60) and the printed circuit board (25) and for providing radio frequency isolation between the display bezel (60) and the printed circuit board (25).
Abstract:
A dual autodiplexing antenna (300) redirects power flow (303) from an unloaded antenna to a loaded antenna, thereby improving communication performance under loaded conditions. The dual autodiplexing antenna (300) includes a first antenna (101) disposed at a first end (103) of a portable two-way communication device (100). A second antenna (102) is disposed at the distal end (104) of the portable two-way communication device (100). The first antenna (101) and second antenna (102) are coupled to a transceiver (107) by a first transmission line matching circuit (201) and a second transmission line matching circuit (202), respectively. In one embodiment, the first antenna (101) is configured to primarily operate in a first bandwidth, while the second antenna (102) is configured to primarily operate in a second bandwidth. When one of the first antenna (101) or second antenna (102) is loaded, power flow (303) is redirected to the lesser loaded antenna.
Abstract:
A wireless communication system having portable communication devices capable of establishing direct terminal-to-terminal communication through another terminal without having a fixed base station. A portable communication device used as a terminal is capable of functioning as a router for other communication devices while maintaining separated communications with another device. Upon registration (904, figure 9), the device searches the device begins the process of communication by discovering other devices (906).
Abstract:
A method for a first portable communication device (1102) of a plurality of portable communication devices located in a first cell (1104) of a plurality of cells to establish communication with a second portable communication device (1106) located in a second cell comprises acquiring a third portable communication device (1124) located within a first central region (1112) of the first cell (1104), instructing the third portable communication device to acquire a first set of up to three portable communication devices (1126, 1128, 1130), each located in a different sector (1132, 1134, 1136) of the first cell from each other, and acquiring a second set of up to three portable communication devices (1138, 1140, 1142) located in a first outer region of the first cell, each located in a different sector (1144, 1146, 1148) of the first cell from each other and from the first set of devices. A first message targeted for the second device (1106) is transmitted along with an out-of-cell broadcast request to the third device (1124) and to the second set of devices. The third device is instructed to re-transmit the first message targeted for the second device along with the out-of-cell broadcast request to the first set of devices and the first and second sets of devices are instructed upon reception of the out-of-cell broadcast request to re-transmit the first message to cells adjacent to each of the first and second sets of devices. It is then determined if the second portable communication device (1106) has received the message.