Not sure due to lack of information to go on
I. think you need a tv coaxial female to f plug male adapter
really depends on the TV cable cord what is the gender of the end of the cable if it is coaxial male then the adapter needs a female coxial
if the tv has a female socket hole then the f type part of adapter needs to be a male.
The tv manual may shed some more info on the type of RF antenna coaxial connector. it uses.
RCA can be confused as av is to do with with hooking up a Video recorder with Video output being the yellow plug and audio with Red and white plugs.
I think you need a RF coaxial adapter rather than AV RCA if you are connecting tv to a tv antenna or tv antenna splitter device.
there is a RCA standard that has adapter like below link http://www.radioparts.com.au/product/30255099/pa5099-%27f%27-plug-to-rca-socket-adaptor#.VUa7uJM_xhI
again gender types are needed to be considered before deciding if correct type of adapter..
You could research the rca rf standard to see if it is used in your country. My country uses Pal coaxial standard.