Helix Antenna

The AX3705 is a helix antenna that supports four satellite constellations and dual frequencies, which is designed for UAV systems and mobile devices. It can be used in aerial photography, telemetry technology, disaster monitoring, traffic patrol, security monitoring, etc.
This helix antenna has exceptional pattern control, polarization purity, and high efficiency in a very compact form factor. The antenna has a high gain and a wide beam width to ensure that satellite signals can be received at low elevation angles.


  • Supports GPS L1/L2, GLONASS L2/L2 and BeiDou B1/B2 signal reception

  • High stability and high repeatability at phase center

  • High gain antenna having superior tracking performance at low elevation angles

  • Very low noise figure

  • SMA male connector

  • Ground plane independent




Frequencies                                       GPS L1/L2

                                                            GLONASS L1/L2

                                                            BeiDou B1/B2

Peak Gain                                          1217-1257MHz: 2dBi

                                                           1559-1610MHz: 2.5dBi

Polarization                                        RHCP

Axial Ratio                                          ≤3dB

Impedance                                        50Ω

Output VSWR                                    ≤2.0 


LNA Gain                                           33dB(typical)

Noise Figure                                      ≤1.5dB

Output VSWR                                    ≤2.0

Operation Voltage                            3.3V~12V DC

Operation Current                            55mA(max)

Group Delay                                      <15ns


Size                                                      ​φ 27.5 x 60mm

Connector                                           SMA female

Weight                                                 ≤19g


Operating Temperature                      -40℃ ~ +70℃

Storage Temperature                           -40℃ ~ +70

Humidity                                               95% not condensing

Dust & Waterproof                              IP65

@ 2019 TECPHIL Geosolutions Co.

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