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HA.21 868MHz 2dBi Helical Monopole Antenna


868MHz Helical Monopole Antenna
Quarter wave-length monopole
Mechanically Sturdy in a compact size
2dBi Peak Gain, 70% efficiency
Dims HA.21.A: L=11mm Ø10.25mm
Dims HAD.A.21 EVB: 81*160*12mm
Dims HAD.B.21 EVB: 159*80*12mm

Image HA.21.A


HA.21 868MHz 2dBi Helical Monopole Antenna


The HA.21.A is an ISM 868MHz quarter-wave monopole helical antenna. Small and compact, yet stable, this helical coil antenna is ideal for typical 868MHz applications such as;

  • Smart Metering
  • Smart security systems
  • Remote asset monitoring and other wireless communication devices.

The helical coil antenna offers industry-leading 70% efficiency at 868MHz on a 126.8 x 80.1mm ground plane, with matching components (orthogonally mounted to ground plane, see HAD.B.21 performance). Made of copper alloy, the helical coil is mechanically sturdy. It can be easily mounted on the surface by soldering. Since it is a monopole design, it must be connected to the main-board device ground-plane to radiate efficiently.

Taoglas has two models of evaluation boards, HAD.A.21 and HAD.B.21, to show performance when the antenna is parallel mounted, or orthogonally mounted to the ground plane. Small embedded antennas can easily detune or lose efficiency on different boards and in different device environments. Taoglas offers a testing and tuning service for custom antennas, subject to NRE and MOQ.

For more information or installation instructions please contact your regional Taoglas customer service team.

Technical Specification
Name Value
RoHS Yes
Antenna Type Embedded Antennas, ISM/LoRA
Mechanical Style Coil
Gain (Max) 2
Impedance 50
Minimum Operating Temperature -40°C
Maximum Operating Temperature 85°C
Mounting Style SMD/SMT
Termination Style SMD/SMT
Connector Body Style Straight
Polarity Linear
Frequency Range 850MHz - 880MHz
Connector Polarity Normal
Cable Length (mm) n/a
Packaging PE Bag, Carton
Length (mm) 10.25
Width (mm) 10.25
Height (mm) 11
Weight (g) 0.7

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