I have to use SMA connector with a flange for very small antenna as shown in figure attached. Overall size of the antenna is 18 mm x 10 mm and patch size is just 7 mm x 4 mm. So use of SMA connector makes the design bulkier and not easy to solder.
Rosenberger has got nice solder-less connectors for DC- To be fixed with screws GHz. Can be reused easily. Soldering makes things harder. Consider "1mm connectors".