Tatomirescu, Alexandru2; Alrabadi, Osama3; Pedersen, Gert Frølund2
1 Department of Electronic Systems, The Technical Faculty of IT and Design, Aalborg University, VBN2 Antennas, propagation and radio networking, The Technical Faculty of IT and Design, Aalborg University, VBN3 The Faculty of Engineering and Science (TECH), Aalborg University, VBN
The duplex filter is probably still the most expensive component in mobile handsets for the significant Transmitter (Tx) — Receiver (Rx) isolation required. This paper suggests to relax or even replace the duplex filter by equipping the Tx and the Rx with two separate antennas. The two antennas are different in the sense that one is balanced and the other is unbalanced. By properly controlling the two arms of the balanced antenna, impressive Tx-Rx isolation is obtained by canceling the coupling trans-impedance between the two antennas.
Antennas and Propagation Conference (lapc), 2012 Loughborough, 2012, p. 1-4