There hasn't been amateur satellite activity on the HF bands since the Russian RS-10/11 and RS-12/13 satellites went silent in the late 1990s and early 2000s, respectively. Now, China's AMSAT organization – CAMSAT – is planning to launch two satellites this fall, one of which will bring satellite communication back to HF.
According to AMSAT-UK, CAS-5a is
slated to include an HF/HF transponder and an HF/UHF transponder as well as an
HF beacon and VHF/UHF linear and FM transponders. The second satellite, CAS-6,
will have a UHF/VHF linear transponder as well as an atmospheric wind detector.