| 摘要 |
The invention relates to an antenna interface circuit and a method for transmitting and receiving signals in collocated wireless communication systems. The collocated wireless communication systems operate at least partially in the same frequency band. The Problem to be solved is to improve the performance of shared antenna systems compared to separate antenna systems and to support antenna diversity with the same interface circuit. The current invention substantially solves the problems of both the splitter- based shared antenna solution (high insertion loss) and the switch-based antenna solution (limited support of simultaneous operation). The antenna interface circuit in the present invention solves the problem by means of a directional coupler with four coupler ports where the first coupler port is attached to the first antenna port of the mobile device and with the thirdfourth coupler port to the second antenna port of the mobile device and a DPDT switch (DPDT = double pole double throw) with four switch ports, four switches and two control lines is attached with a first switch port to the second coupler port and with the second switch port to the third coupler port and antenna is connected with the third switch port. |
