What is the name of this antenna connector on the Kenwood TH-F6A?
That is a standard female SMA connector.
Yes, that is a standard Female SMA connector. Heads-up to be careful when purchasing SMA antennas as there are several combinations. Most higher-end HTs have a standard Female SMA connector on the radio, and a standard Male SMA on the antenna. Many of the newer Chinese-made HTs invert that, with the standard Male SMA on the radio, and a standard Female SMA connector on the antenna. Meanwhile, most WiFi equipment uses "Reverse Polarity SMA" (RP-SMA), where the threads are the same as the standard male & female, but the pin and receptacle are swapped:
- Standard SMA Female = center receptacle & external thread
- Standard SMA Male = center pin & internal thread
- RP-SMA Female = center pin & external thread
- RP-SMA Male = center receptacle & internal thread
See the wikipedia article for details and images: https://en.wikipedia.org/wiki/SMA_connector
I had previously written here, incorrectly, that the Chinese HTs have RP-SMA connectors, which is apparently a common mis-conception among Hams (myself included). Thanks to MoTLD for the correction.