The quad-helix omni (QHO) designs bring the advantages of the characteristic quad-helix antenna radiation pattern to mobile ENG uplink/downlink applications.

The QHO features carefully designed helix parameters to optimize performance characteristics for such applications.

The QHO antenna provides a circularly polarized omni-directional radiation pattern with peak gain of 4 dBi at 30 degrees above the horizon, and then decreasing gain, with no nulls, as the elevation angle increases to the overhead 90 degree direction. The shape of this radiation pattern naturally compensates for the change in path loss as a mobile transmitter moves from the overhead direction out towards the horizon.

Good coverage is provided in this way from approximately 20 degrees above the horizon to the overhead direction.

Quad-Helix Omni antenna

applicatiOns:n Mobile ENG uplink/downlink

Features:n Polarization: RHCP or LHCP

(specify)

n Return loss: 14dB typical (1.5 to 1 VSWR)

n Connector: "N" Female

n Mount: Flange with through holes or helicoil inserts in (solid) base. (specify)

200 International Drive, Mt. Olive, NJ 07828 USA T. +1.908.852.3700 F. +1.908.813.0399 www.imt-broadcast.com

Nucomm reserves the right to make changes to specifications of products described in this datasheet at any time without notice and without obligation to notify any person of such changes.

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Designation Frequency Band Height Diameter Weight

QHO205 1.98-2.11GHz 190mm/7.5" 95mm/3.7" 0.32kg/0.71lbs

QHO240 2.30-2.50GHz 190mm/7.5" 95mm/3.7" 0.32kg/0.71lbs

QHO260 2.50-2.70GHz 190mm/7.5" 95mm/3.7" 0.32kg/0.71lbs

QHO355 3.40-3.70GHz 145mm/5.7" 75mm/2.9" 0.29kg/0.64lbs

QHO385 3.70-4.00GHz 145mm/5.7" 75mm/2.9" 0.29kg/0.64lbs

QHO495 4.80-5.10GHz 120mm/4.7" 54mm/2.1" 0.25kg/0.55lbs

QHO650 6.40-6.60GHz 120mm/4.7" 54mm/2.1" 0.25kg/0.55lbs

Please ask us if your application requires a frequency band not listed here.

Quad-Helix Omni antenna

QHO Elevation Pattern