This spectrum
is split into two paths, where two 10 MHz-bandwidth electrical
BPFs select two up-converted WiFi signals respectively in the
X-band and S-band. In more details, the filters are centered
at 9920 MHz, i.e., CF1 = 25FMLL − IF1 , and at 2520 MHz,
i.e., CF2 = 6FMLL + IF2 .