With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bsnAPIfPhyAntennaMode
bsn AP If Physical Antenna Mode
1.3.6.1.4.1.14179.2.2.2.1.7
Antenna Mode of the AP Interface. For 802.11a this attribute will always be omni for now. This attribute doesn't apply to interface of type 802.11b.
Back to AIRESPACE-WIRELESS-MIB MIB page.
IPHost Network monitor allows you to monitor bsnAPIfPhyAntennaMode on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.