VHF Adaptive Antenna Using a Rear Defogger

An array antenna for the VHF band, which has several ports on a defogger, is proposed. In addition, the concept of a reactively steered adaptive array is introduced to form an adaptive beam pattern. The resistivity of a heating wire does not degrade the receiving performance significantly. The cost of the adaptive array consisting of a single receiver is low, and this array does not impact the industrial design. Its performance is evaluated by numerical simulation and experiments over a bandwidth of FM radio.