GPS/GNSS Antennas

Multi-GNSS antenna (For Timing) Model AU-217

Antenna for GPS, GLONASS, Galileo and QZSS reception.
Ideal for use in difficult site enviorments including urban areas, weather and RF interference areas

The AU series is a GPS/GNSS antenna for Timing that is intended for installation on buildings. The AU-217 has excellent weather and interference resistance, and has the capability to filter radio waves that adversely affect the GNSS receiver (such as radio waves for broadcasting and satellite communications). The AU-217 is multi-constellation compatible and can receive signals including GPS (USA), GLONASS (Russia), Galileo (Europe) and QZSS (Japan). When combined with a GNSS receiver that supports these satellite constellations, it is also suitable for use in urban areas with poor sky visibility.

Documents, Software

New Products: Dual/Single-band GNSS Antennas AU-500/300 deliver both high stability and high robustness



  • Supports longer antenna cable lengths

    High 40dB gain and wide range of power voltages from 2.5 to 16 VDC
  • IP67 compliant waterproof and dustproof

  • Standard TNC Connection

  • Easy installation with an optional antenna mounting bracket

  • Developed specifically for GPS/GNSS Timing applications

    Timing GNSS receiver module: GT-87/GT-88
    GNSS Disciplined Oscillator: GF-87 series/GF-88 series



Input Frequency
1575 MHz to 1606 MHz
R. H. C. P. (Right Hand Circular Polarization)
Antenna Gain
>= 4.25dBi (at 90° elev.angle)
>= -3dBi (at 10° elev.angle)
Output Impedance
50 Ω
Pre. Amp Gain
Pre. Amp Noise Figure
2.5 dB (Typ)
<1.5:1 (@LNA output)
Supply Voltage
2.5 to 16 VDC nominal
Power Consumption
20 mA max (85°C)
Operating Temperature
-40°C to +85°C
Storage Temperature
-40°C to +85°C
Operating Relative Humidity
< 97%RH
Water Resistant
150 g
Connector Type


Three essential points when installing a GNSS antenna

When installing a GNSS antenna, components such as the coaxial cables and amplifiers should be selected to satisfy the antenna specifications of the GNSS receiver. It is also necessary to consider the propagation delay between the antenna and the receiver.  

In the following document, we explain how to calculate the required specification values with concrete examples from the viewpoint of a GNSS receiver manufacturers.

  • Total gain
  • Total NF
  • ropagation delay in coaxial cables

It is especially useful for those who are new to GNSS receivers. We have prepared an Excel tool for calculating "Total Gain" and "Total NF" due to their complex formulas.

Please fill in the form to download the document and calculation tool.

Download form

Documents, Software

Download documents and software related to this product and other GPS/GNSS products (Specifications document, Drivers and Monitor software).

Download contents for AU-217

  • GNSS Antenna Installation Procedure
  • GNSS Antenna Installation Appendix
    - Three essential points when installing a GNSS antenna -
  • Hardware Specifications (Surge Protective Device)
  • Surge Protection Device Test Report

Download page


* Specifications subject to change without notice.