i want to use the 2 RF pins of DW3000, and each pin connect to a RF high speed Switch， and the switch choose the way to connect to a vertical or horizontal SMA, then connect to a antenna. does this design is ok? should i add the LNA and band pass filter to the receiver link?i have made one board, and test it,but the receive seems not always good,and the IRQ seems into error also. can somebody gives me some advice?