Hello, I am more or less new to this. I want to insert two antennas to TI's WL1801MOD. The first antenna is a chip antenna ANT016008LCD2442MA1 and the other one an external antenna connected to a 50 ohm cable through a connector.Just to determinate something we don't want to use both antennas at the same time. One of them is going to be used each time. So the correct schematic can be seen in the following picture. We want each time to discard ether C166 or C167 so the two antennas are going to be totally isolated. What should I have to consider in this design. Just design 50 ohm impedance line from the chip to the antennas is enough or I have also design a matching network. Does the length of the line plays any particular role when designing a matching network. I'll also have to meet the FCC requirements for WLAN. You can take an idea of what I want to do by looking in the attached picture. I don't know if the circuit is correct I've more or less copied other designs from evaluation boards. But in these evaluation boards even though they use the same configuration for external and chip antenna they use different circuits for matching network. Can anyone help me with this? Thanks.