The CD93 Series are high performance elevated feed mobile antennas which can be used in virtually any mounting position. When gutter or roof bar mounted, high above a vehicle, and delivers a full 6.5 dB of gain over a 1/4 wave whip. This model CD93-71-70 supports operation over frequency range 470 MHz to 490 MHz and is not fitted with any cable or connector.

Product Features:

• Totally ground plane independent
• Elevated feed boosts radiating element above obstructions
• Phasemasterâ„¢ whip section provides superior performance and strength
• Quality construction - choke assembly is crafted from chrome plated solid brass
• Can be used with a variety of mounts.

Mopole antennas such as the CD93 has been shown to exhibit a 6.5 dB improvement in received signal level in the field when compared to a ¼ wave whip however in pattern tests exhibit only 1.5 to 2 dB over a ¼ wave (equivalent to 1.5-2 dBi). This improvement in performance can be attributed to a lower radiation angle level of these ground independent antennas.

Documents:

RFI CD93 Antenna - Datasheet