We're currently using +13dBm Si446x parts on 434MHz in several of our applications. We figured that it's easiest (and cheapest) to just use a Johanson IPD (part number 0433BM41A0019) for matching the RF IC to the antenna. We're also using this with an EZR32WG R69.
According to Johanson's datasheet, this IPD can handle 500 mW (which is about 26 dBm), but Silabs's AN904 says that it is suitable only for ~+10dBm parts, and figure 5. shows that it already loses 1dB when used at 16dBm. (The figure is curious by the way because none of the parts mentioned in the appnote actually support +16dBm output.)
So I'm wondering, is there an IPD for the +20dBm Si446x parts at 434MHz? (What would happen if I tried to use for example the Si4468 with this IPD?)
The IPD is intended for the 10dBm PA, as it has a different matching than the 20dBm PA. I you would try to use it, it would work, but you might not get 20dBm from the PA, the current consumption would be quite high, you would lose sensitivity and lifespan. Therefore it is not recommended.
@therman Thank you Tibi for your reply. Is there another IPD that you can suggest for +20dBm?
Currently there is no IPD for 20dBm, because they were designed for direct tie matching, which was a low power matching back then. There might be a 20dBm IPD for the EFR32 however, but that's another story.
Thank you @therman for clarifiying this!