Siretta direct mount antennas siretta delta7axsmamrps11 sirettas delta 7a is a dual band wifi antenna tuned to 24ghz and 58ghz with a peak gain of 21dbi 110mm long its compact design and hinged joint makes the delta 7a a very versatile antenna that suits most wifi applications its hinged joint provides a flexible means of setting the antenna into its optimum position for wifi transmission the delta 7a is commonly used with wifi bluetooth zigbee and ism based applications to im