DTC COMMUNICATIONS, INC.
21
ANTENNAS
Part Number
Description
QHA-4
Quadrifilar Helix Antenna with Ring-Hybrid feed
Connector: TNC Female
Must be used with SMA to TNC antenna cable
(4045174-006).
The QHA family of antennas was developed to provide a compact solution for
pattern-tailored circularly polarized antennas. This rugged antenna is omnidirec-
tional when the antenna is vertical. The pattern is slightly elevated to allow
overhead coverage. The base of the antenna includes a special flat with #10-32
threaded hole, 0.25-in. deep for mounting. It is available in both RHCP and
LHCP versions.
WARNING: Refer to Appendix A of this manual for information on the proper
use of antennas.
QHA-4
Specifications
Type
Quadrifilar Helix with
Ring-hybrid feed
Polarization
Circular
Peak Gain
4dBiC at 24° above
horizon
Horizontal Beamwidth
Omnidirectional
Vertical Beamwidth
46°
Nominal Impedance
50 Ohms
Groundplane req.
Not Required
Size
8.0” L x 1.25” dia
(203 mm x 32 mm dia)
Weight
3.7 oz. (105 g)
DTC Part Number
Frequency Range
QHA-4-2-R
2.4 to 2.5 GHz, RHCP
QHA-4-2-L
2.4 to 2.5 GHz, Lhcp
