Lumenier has announced the Duality Dual-Mox antennas for DJI goggles v2, which it claims to get over double the range compared to stock DJI antennas. [Note: These antennas have linear polarization and therefore its extended range might work only for DJI FPV. I will test with both DJI FPV and Caddx Vista. I’ve inquired with both Lumenier and GetFPV and will update this post when they respond.]
The Dual Mox antennas are linear directional antennas which increase the range in one direction at the expense of having a shorter range on other directions compared to the stock antennas, which are omnidirectional. The horizontal width is about 120 degrees while the vertical width is about 80 degrees.
The radiation pattern shows that the maximum signal strength is at the edge of the antennas (red areas). The product photos show the suggested orientation.
The Dual Mox antennas are available from getfpv ($54.99 for a set of four). I ordered a set and will be posting my results.