Siretta direct mount antennas siretta delta8axsmamss17 the delta 8a is sirettas smallest wifi antenna measuring only 26mm in length it successfully compacts a frac14 wave dipole into an incredibly small housing that meets the demands of wifi users who require a covert non obtrusive antenna design the delta 8a can be used with various wifi bluetooth and zigbee applications with only slightly reduced gain compared to the delta 7a and delta 6bc the delta 8a is designed for space