it’s best to make your own as no commercially available vhf beam fits a sota activator. They’re either too heavy or don’t pack sensible or they have tiny screws which are a pain when you have cold and wet fingers.
However, a commercially built HB9CV may be a reasonable start to get into 2m. The above mentioned DK7ZB 4 ele 50 Ohm 1m boom is a nice design for sota, though I preferred the 28 Ohm design and used this antenna quite a time. It gives a good gain at a wide angle. I designed her lightweight and small-packing, so shewas 550 g and packed good 50 cm.
I’ve been using the 28 Ohm OWM 1,5m boom design for a year now. http://www.qsl.net/dk7zb/start1.htm She has a great SNR and is quieter than the 4 ele. Also packs at ca. 50 cm and is abt. 600 g. For my purposes, there is no better design. A shorter boom gives less gain, and a longer makes the antenna point too sharply and wind will be an issue.