Would it be possible to tune the radio's antenna poor reception for 2002 XG350L where is the antenna?

I believe I read somewhere that the XG350/L antenna was embedded in the windsheild. Some aftermarket head units can boost the signal quality better than the stock radio, or there are "antenna boosters" that install on the antenna cable and are 12 VDC powered. I haven't tried a separate booster, so I don't know how well, or if they work. I've had the best luck in other vehicles installing Pioneer head units with the "Super Tuner" tuners. [Revision:06/28/08] After looking through some documentation, the antenna is embedded in the rear window (not the front windshield) and there is a built-in/factory antenna booster mounted to the underside of the rear shelf (where the speakers mount.) I've seen at least one other person who had to replace the booster due to poor reception.