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Impact / Water Resistant GeoHelix-S Active GPS Antenna
GEOHELIX GPS ANTENNAS REQUIRE NO GROUND PLANE & DO NOT REQUIRE A CLEAR SKY VIEW. CONSTRAINED NEAR-FIELD DOES NOT INTERACT WITH NEARBY COMPONENTS OR THE USER. THEREFORE MULTIPLE ORIENTATIONS & MECHANICAL CONFIGURATIONS ARE POSSIBLE. |
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Jim D. Gray & Associates, Inc. |
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Supporting O.E.M.’s since 1977 |
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Amplifier Performance |
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Radiation Pattern (dBic, Free Space,
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Current vs Vcc
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Gain vs Vcc
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972-699-9976 |
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Impact / Water Resistant GeoHelix-S Active GPS antenna provides 24dB of gain in a small, quadrifilar helix package with a high-performance, low noise, low power amplifier.
The Impact / Water Resistant GeoHelix-S Active GPS antenna delivers stable performance in all modes of use, whether it’s measured in free-space or surrounded by lossy dielectric materials, and is suitable for embedded or externally mounted application
Ideal uses for the Impact / Water Resistant GeoHelix-S Active GPS Antenna include any devices where the GPS receiver requires a high-gain pre-amplifier, where the receiver or antenna co-exist with other RF or high-frequency electronics or where the device is to be held or worn by the user.
Geohelix-S Product Summary GPS L1-band quadrifilar helix antenna 24dB pre-amplified gain Low voltage, low current, low noise High isolation from platform rejects common-mode noise Negligible proximity de-tuning Integral SAW filter attenuates common cellular frequencies up to 55dB Constrained near-field does not interact with nearby components or the user Strong circular polarization Broad beamwidth excellent near-horizon reception Predictable performance in all modes of use |
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Geohelix-S Specifications |
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Frequency: |
1575.42MHz ± 2MHz |
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Polarization: |
RHCP |
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Voltage: |
3.3Vdc (typical) |
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Current: |
15mA (typical) |
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Gain: |
+24dB (zenith typical) |
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Beamwidth: |
> 120° (typical) |
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Axial Ratio: |
< 2.0 (zenith typical) |
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VSWR: |
< 2:1 (typical) |
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Impedance: |
50 Ω |
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Noise Figure: |
1.2dB (typical) |
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3rd Order Intercept: |
0dBm |
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Op. Temp.: |
-40 to +85°C |
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Element Dim.: |
10mm diameter x 17mm length |
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Overall Dim.: |
0.8”diameter x 2.44”length (including SMA male connector) |
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Available connectors |
SMA male, SMA female, TNC male, TNC female |
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Available in a flush mount Twist-On (TNC or SMA) |