When considering cost, efficiency, and coverage concerns as well as tower space availability, many FM broadcasters will choose to interleave their digital antenna with either a new or existing analog antenna. The HDR Series antenna solutions provide extensive flexibility while maintaining high isolation between the digital and analog system. Since both antennas will have the same tower geometry adjacent to them, the azimuth and elevation patterns of both systems will be the same and will meet FCC and predicted pattern requirements.

The HDR Series arrays are very cost effective. The cost of the antenna, second run of low power transmission line and low power circulator is substantially less than the system cost of a 10 dB coupler and a transmitter large enough to compensate for additional system losses.