Siretta embedded antennas siretta echo1101mipexss12 the echo 11 from siretta is a wifi wlan dedicated pcb antenna that achieves impressive levels of performance due to fine tuning between 24 and 25ghz being tuned to this frequency band means the echo 11 antenna can be used with wifi bluetooth zigbee and ism based applicationswith a small footprint of only 45 x 10mm the echo 11 is perfect for those applications where internal space for components is limited or applications wher