I learned about the Kurz docking system in this answer, then found out what they looked like in this and in this answer. Those images show several tiny dish antenna structures sticking out from various ISS modules and spacecraft.
I've shown an example image below, where I've indicated what looks like two (slightly) different types of antenna-pairs, plus an unpaired object that might be an antenna as well.
Reading Section 3.2.2 of David C. Woffinden's 2008 Ph.D. thesis Angles-Only Navigation for Autonomous Orbital Rendezvous (originally linked here) I can see that there are several radar different radar signals used by Kurz, possibly both linked and one-way signals.
How many Kurz antennas does a spacecraft or ISS module have in toto, and how do the different functions and signals map on to them?
below: Cropped and annotated, from here. "ISS029-E-036167 (2 Nov. 2011) --- An unpiloted ISS Progress resupply vehicle approaches the International Space Station, carrying 1,653 pounds of propellant, 110 pounds of oxygen, 926 pounds of water and 3,108 pounds of maintenance gear, spare parts, experiment hardware and resupply items for the residents of the space station. Progress 45 docked to the station's Pirs docking compartment at 7:41 a.m. (EDT) on Nov. 2, 2011." Original from here.