Mcgill antenna 6dbi tuned 915mhz omni directional for helium hotspot miner we carry mcgill's most popular helium antennas. Directional Flat Panel 10 dBi. RetiCAM is a McGill Microwave Authorized Reseller. These optimized Antennas feature a superior VSWR performances of 1.51 maximum, which immediately results in over +7% more transmitted, non-reflected Power from your Antenna and reduced Mis-match loss when compared to many of the commercially available 21 VSWR performance.