HA31A Datasheet, PDF (19/24 Pages) Taoglas antenna solutions – 915MHz 2dBi Embedded Helical Monopole Antenna

7.2 Return Loss
7.2.1 HAD.A.31 EVB Board (Different Ground Lengths)
7.2.2 HAD.B.31 EVB Board (Different Ground Lengths)
DSP-15-8- SPE-16-8-017/C/WY Page 19 of 24