PCTEL Maxrad no ground plane VHF antenna. The Maxrad no ground plane chrome coil antenna is specifically designed for installations that are lacking suitable ground plane. If your vehicle or mounting location has a lot of fiberglass, aluminum, or plastic a suitable ground plane for your VHF antenna may prove to be a challenge. Maxrad's No Ground Plane (NGP) VHF Antenna was designed exactly for these situations. The MHB5802 is a ½ wave base loaded antenna compatible with new Motorola-style mounting solutions. The MHB5802 is fully field tunable. Manufacturer suggested rod length guide is included to match proper frequency (MHz) to your application.