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Impact / Water Resistant GeoHelix-SMP Passive 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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Return Loss |
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Typical Impedance |
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Radiation Pattern (dBic, Free Space, No Ground Plane
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972-699-9976 |
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Impact / Water Resistant GeoHelix-SMP Passive GPS Antenna offers unbeatable performance in a small, internal mount or external mount package.
The Impact / Water Resistant GeoHelix-SMP 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-SMP include PDAs/PNDs, smartphones, GPS/Bluetooth® navigation devices, or any device where the GPS 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.
Product Summary GPS L1-band quadrifilar helix antenna Integral balun Requires no ground plane High isolation from platform rejects common-mode noise Negligible proximity de-tuning Up to 28dB filtering of common cellular frequencies Constrained near-field does not interact with nearby components or the user Strong circular polarization Broad beam width & excellent near-horizon reception Predictable performance in all modes of use |
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Geohelix-SMP Specifications |
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Frequency: |
1575.42MHz ± 2MHz |
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Polarization: |
RHCP |
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Efficiency |
23% (total); 45% (hemispherical) |
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Gain: |
-3.8dB (zenith typical w/o ground plane) |
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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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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 2.0”length ( with SMA male connector for external mount) |
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Available connectors |
SMA male, SMA female, TNC male, SMA female |
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Available in a flush mount Twist-On (TNC or SMA) |