PERFORMANCE CHARACTERISTICS

DATA SHEET

FEATURES

HE SERIES

COMPACT HELICAL

ANTENNAS

ANT-315-HE**, ANT-418-HE**

** = SM (SURFACE-MOUNT)

TH (THROUGH-HOLE)

DESCRIPTION

RADIATION PATTERN

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.

•

Compact design for easy concealment

•

High-grade phosphoric bronze construction

•

Precision wound for consistent performance

•

Surface-mount or through-hole styles

Recipient understands any or all of the above specifications are subject to change without notice and proceeds with integration at own risk.

Side View

.25"

1.5"

Through-Hole Style

End View

OD=.35"

ID=.25"

OD=.35"

ID=.25"

Surface Style

End Views

1.5"

.150"

.300"

Groundplane

Minimum distance

to groundplane

.50"

Helical Layout Example

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CH1

SWR

MARKER VSWR = 3.2

Helical Parallel to Ground Plane

CH1

SWR

MARKER VSWR = 2.8

Helical Perpendicular to Ground Plane

PART #

DESCRIPTION

ANT-315-HESM

SURFACE-MOUNT 315 MHZ

ANT-418-HESM

SURFACE-MOUNT 418 MHZ

ANT-433-HESM

SURFACE-MOUNT 433 MHZ

ANT-916-HESM

SURFACE-MOUNT 916 MHZ

PART #

DESCRIPTION

ANT-315-HETH

THROUGH-HOLE 315 MHz

ANT-418-HETH

THROUGH-HOLE 418 MHz

ANT-433-HETH

THROUGH-HOLE 433 MHz

ANT-916-HETH

THROUGH-HOLE 916 MHz

ORDERING INFORMATION

For Applications Subject to

Vibration or Shock

Suggested Board Layout

Parallel to Groundplane

Perpendicular to Groundplane

Surface-Mount Style

Through-Hole Style

•

Low physical impedance

•

Rugged construction

•

Very low cost in volume

HE Series antenna patterns have not been fully characterized as of this

time. The patterns below illustrate typical patterns for antennas of this

type.

1.0"

Feed Trace

.18" - .090 width

.25 - .45 max. length

0.200"

0.110"

(916MHz)

Wire Diameter 0.050”