| 摘要 |
The invention relates to an improved transmitting-receiving circuit for overlapping transmitting and receiving channels comprising two 3-gate circuits ( 15 a , 15 b), wherein two transmitting paths ( 11 a , 11 b) are associated to a transmitting input ( 1 ), two receiving paths, ( 25 a , 25 b) are associated to a receiving output ( 3 ) and two antenna paths ( 21 a , 21 b) are associated to an antenna connector ( 5 ), each part leading to said two 3-gate circuits ( 15 a , 15 b). A phase shift, preferably of 90°, is carried out in one path, respectively, whereas no shift phase is carried out in the corresponding parallel path, thereby making it possible to produce a broadband suppression on the receiving output for all signal components jumping from the transmitting input ( 1 ) over to the receiving output ( 3 ). |
