Antenna diversity can be controlled using sysctl (/proc/sys/dev/athX/{diversity,txantenna,rxantenna}): {{{ diversity: 0: no 1: yes txantenna and rxantenna: 0: auto 1: antenna 1 2: antenna 2 }}} Which connector corresponds to antenna 1 and which to antenna 2 depends on the particular radio hardware. For example, to disable diversity and select antenna 1 for receive and transmit you'd do the following: {{{ sysctl -w dev.ath0.diversity=0 sysctl -w dev.ath0.txantenna=1 sysctl -w dev.ath0.rxantenna=1 }}}