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Original antennas made in the US, by us, for the greater World

Price: $212.24

Typical leadtime if item is not in stock: approx. 2 weeks (call for stock status)

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    NSN No. 5985015756908 (SMA Male)

    Amplified/Active GPS/GNSS Antenna Description

    The UC-1574-431R is a Quadrifilar Helix Antenna (4 cm/1.5" OD x 11 cm/4.5" H) designed for use with GPS L1, 1.5754 GHz receivers and systems.

    It features a built-in, robust (+10 dBm IIP3, In -5 dBm/Out +18 dBm P1dB), +22 dB Low Noise Amplifier, preceded by a GPS filter, and followed by another GPS filter (2 filters). This combination of a small QFHA, a tough LNA and 2 filters, makes the UC-1574-431R an ideal antenna for very harsh electromagnetic environments, or in applications where GPS performance is affected by out-of-band interference from other devices, such as a radio transmitter.

    This antenna has been reported to work exceptionally well as a GPS Microcell Antenna, or GPS Femtocell Antenna for local (free) 3G connectivity. The UC-1574-431R has been successfully used on Microcells operating in RF noisy environments and concrete building basements. AT&T Microcell models require an MCX Male connector (-MCXM), Verizon Microcell models use an SMB Female connector (-SMBF).

    LNA power is provided by your GPS receiver through the coaxial cable. No external power supplies are necessary. The UC-1574-431R is very tolerant of wide voltage variations and voltage range. Minimum supply voltage for nominal operation is +3.5 VDC. Operation at lower voltages gracefully derates performance of the LNA.

    UC-1574-431R Technical Specifications UC-1574-431R Datasheet

    • Frequency range: 1565-1585 MHz
    • Coverage: Hemispherical
    • Polarization: Right-Handed, Circular (AR 3 dB)
    • Gain: +27 dBic
    • Nominal Impedance: 50 ohm (RF)
    • Input Power: Receive only antenna
    • VSWR: 2.0
    • LNA Noise Figure: 3.9 dB
    • LNA IIP3: +10 dBm
    • LNA P1dB: +18 dBm out / -5 dBm in
    • LNA Current: 70 mA
    • LNA Supply Voltage: 3.5-18 VDC (internally regulated)
    • Connector: SMA Male on 24" coaxial cable
    • Dimensions:
      • Housing 4 cm (1.5") OD x 11 cm (4.5") h
      • Bottom flange 5 cm (2") OD x 13 mm (0.5") h
    • Mounting: 1 screw, 1/4"-20
    • Operating Temperatures: -40C to +85C
    • Weight: 250 g / 0.5 lbs
    • Shipping Weight: 300 g / 0.6 lbs


    • Does not require a ground plane
    • Specifications and prices are subject to change without notice

    This product is compatible with the following Antenna Accessories:

    Availability, specifications & prices subject to change without notice