Its very likely that in the case of the 052C/D, the VHF radar would detect the target, and then direct the Type 346 radars to it. The Type 346 radars will then track it more accurately. Of course, the use of the VHF radars alone can get a more quality track if you have a bunch of 052C/D that is doing CEC with these radars, and that will provide a better tracking picture for the Type 346 radars to home on, and the information among the Type 346 from various ships can be exchanged and fused using CEC.Is it also true that VHF like Yagi antennas do not give the ability to target or even meaningfully track VLO targets? They can't guide missiles either. Plus having the 055 give up the space and energy for these antennas is sort of redundant as well since they will almost definitely operate as a networked fleet sharing information and having 052C and 052D having this "ability" should be enough for the fleet. Honestly the 346B is probably powerful enough to meaningfully target and provide firing solutions against stealth in decent enough ranges.
I remember recently reading about some Chinese paper or academic disclosing projects where they combine multiple high powered radars and use software to analyse the data and amplify the signature of a VLO target. Modern radars alone can already detect stealth fighters at closer ranges. It's a problem of working out how to find patterns between the information given by many radars to detect them at longer ranges. Anyway if anyone has the paper or the link, please share.
In the case of the Type 346B, it no longer needs that additional VHF process. I would think that not only is the radar more powerful, but so is its gain and sensitivity in receiving. If the ship has CEC, and I think it has, it would also share that information to other destroyers via CEC.
Here is another question that people should be asking:
Why doesn't the 052D improved just use the Type 055's 346B radar and get rid of the VHF array? The introduction of the new VHF array also surprised me. They bothered to create a new VHF array for the 052D but not on the 055? Why does the improved 052DL still use the VHF array even if that array has been improved?
This is my hypothesis. The 052D cannot use the Type 346B radar of the 055 because it doesn't have the power and cooling requirements for the Type 346B. This strengthens another hypothesis, and the Type 346B radars are using Gallium Nitride. Instead, they choose to improve the VHF radar. So this in other words, is like a patch.
Its possible they can use a sub variant of the Type 346B, smaller, less elements or they put a power limit use to it so it can fit within the 052D's power infrastructure. But a nerfed version of the 346B is also going to be less powerful as a result compared to the 055 version, and may still have to be compensated with a VHF radar. All in all a sub 346B may still be better than the 346A. If they had started to implement this, this would be one of the things we have no visual clues of to detect from the observer side other than hear rumors about it. However, I tend to find the rumor mill to be uninterested on the technical aspects of ships like their fittings, so they don't bother to pass on these things. I am kind of wondering if this was done of the 052DL.
I would be eager to see how the 052E might look as it can either pose or answer more questions.
Will it use the Type 346B radar? Or some sub variant of it.
Will it still use the VHF array?