Siretta delta direct connect antennae siretta delta15smamrarp11 sirettas delta 15 is a direct connect stubby antenna tuned to 24ghz the wifi wlan bluetooth zigbee frequencies and is fitted with a right angled reverse polarity sma male connector despite its small size of only 535mm in length it performs at a high level outperforming most other stubby antennas the delta 15 offers a small and compact cable free antenna solution that is ideal for use with wifi enabled termi