| 摘要 |
Antenna 260 comprising a flexible dielectric sheet 264 imprinted with a conductive pattern 262 where the flexible dielectric sheet may be wrapped around a rigid core. The antenna may comprise more than one pattern each including at least two leads 266,268 and may have electronic components 278,276 attached to the dielectric. By coupling a transceiver to a different pairs of leads, corresponding to different patterns, the antenna may be operative to a plurality of RF modes. The antenna may have a switch coupled between one of the leads and the ground where the corresponding lead of the pattern is connected to a multi mode transceiver. The switch may comprise a frequency dependent impedance unit. A frequency dependent antenna switch system coupled between an antenna and the ground where the switch is at an open mode at a first frequency and a closed mode at a second frequency. Antenna switch system comprising a first phase shift unit coupled between a first end of an antenna and a first transceiver and a second phase shift unit coupled between a second end of the antenna and a second transceiver. Method for operating a dual section transceiver and an antenna where the antenna is coupled to the ground via a variable impedance connection and each of the transceiver sections is associated with frequency band. The variable impedance connection is set to a high value when the selected frequency band is low and vice versa. The transceivers may be connected to the antenna via a phase shift connection. |
