D ATA S H E E T
HE SERIES
COMPACT HELICAL
ANTENNAS
DESCRIPTION
In low-cost RF applications a whip antenna generally provides the best
overall performance. In many cases, however, the use of a whip is not
practical for cost or cosmetic reasons. In instances where a designer is
looking for a blend of easy concealment, low cost and good
performance, a helical antenna is usually the optimum choice. The HE
series from Linx delivers exceptional performance and ease of use,
while maintaining a cost factor appropriate for high-volume
applications. Linx helical antennas are precisely wound and matched to
provide the lowest possible SWR at the operational frequency. In
addition, the antenna diameter and inter-coil spacing are optimized to
provide a wider than typical bandwidth.
ANT-315-HE**, ANT-418-HE**
ANT-433-HE**
,
ANT-916-HE**
** = SM (SURFACE-MOUNT)
TH (THROUGH-HOLE)
Side View
1.5"
.25"
Surface-Mount Style
Surface Style
OD=.35"
ID=.25"
End Views
Wire Diameter 0.050”
F E AT U R E S
•
•
•
•
Compact design for easy concealment
High-grade phosphoric bronze construction
Precision wound for consistent performance
Surface-mount or through-hole styles
•
•
•
Low physical impedance
Rugged construction
Very low cost in volume
Through-Hole Style
Through-Hole Style
OD=.35"
ID=.25"
ORDERING INFORMATION
PART #
ANT-315-HESM
ANT-418-HESM
ANT-433-HESM
ANT-916-HESM
DESCRIPTION
SURFACE-MOUNT 315 MHZ
SURFACE-MOUNT 418 MHZ
SURFACE-MOUNT 433 MHZ
SURFACE-MOUNT 916 MHZ
PART #
ANT-315-HETH
ANT-418-HETH
ANT-433-HETH
ANT-916-HETH
DESCRIPTION
THROUGH-HOLE 315 MHz
THROUGH-HOLE 418 MHz
THROUGH-HOLE 433 MHz
THROUGH-HOLE 916 MHz
End View
Suggested Board Layout
Helical Layout Example
1.5"
.300"
.150"
Minimum distance
to groundplane
.50"
PERFORMANCE CHARACTERISTICS
Helical Parallel to Ground Plane
CH1
SWR
Helical Perpendicular to Ground Plane
CH1
SWR
Groundplane
(916MHz)
0.200"
MARKER VSWR = 3.2
1.0"
Feed Trace
.18" - .090 width
.25 - .45 max. length
MARKER VSWR = 2.8
R A D I AT I O N PAT T E R N
HE Series antenna patterns have not been fully characterized as of this
time. The patterns below illustrate typical patterns for antennas of this
type.
Perpendicular to Groundplane
Parallel to Groundplane
For Applications Subject to
Vibration or Shock
Recipient understands any or all of the above specifications are subject to change without notice and proceeds with integration at own risk.
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0.110"
Microcontroller MCU
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