| 摘要 |
The present invention provides a wireless device for effecting two way wireless transmission, an antenna feed network, and a patch antenna. The wireless device includes an antenna assembly having two inputs accepting two feed signals shifted a feed signal phase difference apart. The antenna assembly receives a radiated signal and produces first and second received signals. First and second reflected feed signals are also produced at the two antenna inputs. A transmitter produces a transmission signal and a receiver receives the radiated signal while the transmission signal is transmitted by the antenna assembly. The antenna feed network interconnects the transmitter port, the receiver port, and the antenna assembly and produces the received signal while effecting substantial 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. |
| 主权项 |
1. A wireless communication device for effecting two way wireless communication including interconnecting a transmitter, and a receiver, said wireless communication device comprising:
an antenna assembly having
first and second antenna feed inputs; anda configuration accepting first and second antenna feed signals respectively at said first and second antenna feed inputs with said first antenna feed signal shifted a feed signal phase difference relative to said second antenna feed signal and, said configuration being excitable by a received radiation wave, when present, of a received signal to produce at least one of two possible signals, said two possible signals being a first received signal and a second received signal which when received are respectively produced at said first and second antenna feed inputs; a transmission signal input for receiving a transmission signal from said transmitter; first and second antenna ports for outputting first and second antenna feed signals to said first and second antenna feed inputs of said antenna assembly; a receiver output for outputting a portion of said received signal to said receiver; a signal dividing assembly receiving said transmission signal from said transmitter and dividing said transmission signal into first and second divided transmission signals having substantially equal amplitudes and a first relative phase shift therebetween; a first routing device having a first port, a second port and a third port, said first routing device routing said first divided transmission signal applied to said first port, to said second port which is connected to said first antenna port and outputting said first divided transmission signal as said first antenna feed signal while passing a portion of said first divided transmission signal to said third port as a first transmission leakage signal; said first routing device having said second port connected to said first antenna port to accept said first received signal, when present, and route said first received signal to said third port simultaneous with said first antenna feed signal being applied to said first antenna port; a second routing device having a first port, a second port and a third port, said second routing device routing said second divided transmission signal applied to said first port, to said second port which is connected to said second antenna port and outputting said second divided transmission signal as said second antenna feed signal while passing a portion of said second divided transmission signal to said third port as a second transmission leakage signal; said second routing device having said second port connected to said second antenna port to accept said second received signal, when present, and route said second received signal to said third port simultaneous with said second antenna feed signal being applied to said second antenna port; a signal combiner assembly having first and second combiner inputs and a received signal output connected to said receiver output to deliver said portion of said received signal thereto, said first and second combiner inputs being respectively connected to said third ports of said first and second routing devices, said signal combining assembly being configured to introduce a phase shift into signals applied to at least one of said first and second combiner inputs such that:
at least a portion of any of said first and second received signals, when present, respectively at said first and second combiner inputs is directed to said received signal output to provide said portion of said received signal; said antenna assembly producing:
a third transmission leakage signal, at said first antenna feed input, which is a portion of said second antenna feed signal; anda fourth transmission leakage signal, at said second antenna feed input, which is a portion of said first antenna feed signal; said first routing device receiving said third transmission leakage signal at said second port and producing, simultaneously at said third port, a third transmission leakage output signal; said second routing device receiving said fourth transmission leakage signal at said second port and producing, simultaneously at said third port, a fourth transmission leakage output signal; said signal combiner having said first combiner input receiving said first transmission leakage signal and said third transmission leakage output signal, and said second combiner input receiving said second transmission leakage signal and said forth transmission leakage output signal, said signal combiner being so configured as to combine said first and second transmission leakage signals at said received signal output with said third and fourth transmission leakage output signals; and a magnetic biasing device applied to one of said routing devices such that an imbalance in levels of said first and second transmission leakage signals and said first and second transmission leakage output signals results to effect substantial cancellation of said first and second transmission leakage signals and said third and fourth transmission leakage output signals at said received signal output. |
