budgetary funds by antennendiversity filter

摘要

Means for filter effect by antennas for communication radio sets and wireless telephones having the transmitter and the receiver in the same housing includes a complicated filter between antenna and set of apparatus. It is necessary to have this duplex filter in the apparatus in order to prevent that the transmitting signal interferes with the receiver in a communication radio or wireless telephone. In order to eliminate the necessity of this filter there are adapted separately from each other one antenna (5) connected with and tuned to the transmitter (3) and the second antenna (4) connected with and tuned to receiver (2).