| 摘要 |
<p>The present invention provides a wireless device for effecting two way wireless transmission, an antenna feed network (20), and a patch antenna. The wireless device includes an antenna assembly having first and second feed inputs (7) and (8) and accepting first and second antenna feed signals shifted a feed signal phase difference apart. The antenna assembly (9) receives radiated signals and produces a first received signal and second received signal at the first and second feed inputs (7) and (8). First and second reflected feed signals are also produced at the first and second feed inputs (7) and (8). A transmitter produces a transmission signal and a receiver receives a received signal composed of at least a portion of the at least one of the first and second received signals from the antenna assembly (9) while the transmission signal is being transmitted by the antenna assembly (9). The antenna feed network (20) interconnects the transmitter port (2), the receiver port (5), and the antenna assembly (9) to apply the transmission signal to the first and second feed inputs (7) and (8) and to simultaneously receive at least one of the first and second received signals from the first and second feed inputs (7) and (8) and produce the received signal therefrom while effecting cancellation of the first and second reflected feed signals. Additionally, or alternatively, first and second transmission leakage signals at the received signal output substantially cancel each other.</p> |
