17 dBi 90 Deg 4.9-5.8GHz VPol Sectorial SA4958-90-17 made by Pacific Wireless (Pac Wireless) They also make one that is: SA4958-120-16 and is also a very good one.
I checked thru Hyperlink (L-Com) Catalogue at a time, what they had is 5.8GHz 17dBi 90 degree sector antenna (I dont know of now) but they had 2.4GHz 20dBi 90 degree sector antenna as at then. Meanwhile, Pacific has 5GHz 19 dbi Integrated antenna and they still work fine for long range.
It is not a sector antenna but It's also a directional antenna. It is called Patch panel antenna- in my own case I opted for integrated one that allowed me to insert my radio inside the antenna thereby getting rid of antenna cables and the rest. It is has 16degree H & V beamangle. very low wind loading.... May nt be suitable for at the base for Ptmp but suitable as a station.