I know FR4 is difficult to be used in microwave area.
However in the board I am going to develop for WLAN 802.11p communications, all rf components (a transceiver MAX2828, a Power amplifier, a LNA and a RF Switch.) are 50ohms I/O matched, then I won’t have any matching network with, I only need some transmission lines, as short as possible (low insertion loss is expected, even with FR4), to connect them.
I think FR4 is a good option for this type of application. Am I right?