I don't know what Brand your model is, since it's not listed in your profile, but the crank up batwing antenna on my PrimeTime TracerAir does NOTHING to improve radio reception.
My previous 2007 Rockwood HTT had a separate whip antenna for the radio.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package