I can provide you with a list of some well-known journals in the RF (Radio Frequency) and Antenna domain that have historically had high impact factors:
IEEE Transactions on Antennas and Propagation: This is one of the most prestigious journals in the field of antennas and propagation.
IEEE Transactions on Microwave Theory and Techniques: While it covers a broader range of topics, it includes significant contributions in RF and microwave engineering.
IEEE Microwave and Wireless Components Letters: Focusing on microwave and wireless components, it often features research related to RF and antennas.
IEEE Antennas and Wireless Propagation Letters: This journal concentrates on the rapid dissemination of novel and high-impact research in antennas and wireless propagation.
International Journal of RF and Microwave Computer-Aided Engineering: It covers the design and modeling aspects of RF and microwave components and systems.
Radio Science (published by the American Geophysical Union): Although not exclusively focused on antennas, it includes research related to RF and electromagnetic wave propagation.
Microwave and Optical Technology Letters: This journal publishes papers on RF, microwave, and optical technology.
I would advise you to also consider journals on applied sciences such as Nature Communications as it also has a high IF (as do many others in the Applied Science category).
Here's some information on the journal:https://www.nature.com/ncomms/journal-information#:~:text=Nature%20Communications%20has%20a%202,to%20the%20first%20editorial%20decision.