Can someone point out where the IFF antennas are located on both the Type 052C and on the Type 052D class ships?
For 052D its the bar you see above the bridge where the bridge is sandwiched between the IFF and the main radar. There are four, each above the four radars. For the 052C, its likely to be a bar underneath the panel on top of the array. The array on the 052C is sandwiched between two bars. Traditionally we see a bar in many SAM phase arrays on top of the face which should be the IFF, and that's true with the land based radar station used for the HQ-9. It helps explain why the Type 346 has a look that's a bit taller than wider. In the 346A, the panel has become a perfect square, so the array now has equal dimensions in height and width. This means no more space of the IFF and it has been externalized and moved elsewhere, which can explain the bar on top of the bridge. There are additional IFF equipment on the mast, including two that rotate, along with transponders that look like dipoles.
Should be the blue ones right here on the Shandong with the Type 364 radar (magenta) in between.