{HEAD ~ The present disclosure} relates to antennas for wireless communications devices, and particularly, to antennas having parameters tunable to optimize {TAIL ~ performance} 
{ HEAD ~ The present disclosure } relates to antennas for wireless communications devices , and particularly , to antennas having parameters tunable to optimize { TAIL ~ performance }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL