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 Sokkia Axis2 GPS Antenna 500-0-0018 US $150.00 
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 Raven Envizio Plus, USED Trade Take Out Antenna included GPS Lightbar US $760.00
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 Thales GPS Antenna Cable Mobile Mapper CE & Promark 3 US $85.00
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 ***2- TRIMBLE GPS ANTENNA L1/L2 ** US $600.00
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 Ag Leader Trimble GPS Antenna Cable EZ-guide 25' US $54.00
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 Raven Cruizer II w/ Patch Antenna Lightbar GPS Mapping - New In Box US $1,535.00
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 GPS Antenna cable - N 90 degree connectors, 50', RG-58 cable US $109.00
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 Trimble Agriculture Guidance EZ Guide 250 GPS Antenna US $45.99
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 TeeJet Matrix Pro 570G with standard antenna GPS Lightbar and ClearPath US $1,600.00
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 TeeJet Matrix Pro 840G with RXA30 antenna GPS Lightbar ClearPath US $2,500.00
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 TeeJet Matrix Pro 570G RXA30 antenna GPS Lightbar w/ Camera and ClearPath US $2,025.00
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 TeeJet Matrix Pro 570G with RXA30 antenna GPS Lightbar and ClearPath US $1,800.00
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 Trimble EZ Guide 250 GPS Lightbar w/ AG15 Antenna w/ EZ Steer System US $4,625.00
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 GPS Antenna Cable TNC to TNC US $55.50
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 Raven Cruizer II w/ Helix Antenna Lightbar GPS Mapping US $1,800.00
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 90° Ag Leader Trimble GPS Antenna Cable EZ-guide 50' US $75.00
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 Trimble GPS GeoXH & Zephyr Antenna cable US $60.00
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 GPS Antenna Cable BNC to Right Angle TNC US $58.65
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 Raven Cruizer II w/ Helix Antenna Lightbar GPS Mapping - New In Box US $1,875.00
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 GPS Antenna Cable TNC to Right Angle TNC US $58.50
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 GPS Antenna Cable heavy duty Type N - RA N US $80.65
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 GPS Antenna Cable BNC - TNC US $55.90
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 90° Ag Leader Trimble GPS Antenna Cable EZ-guide 10' US $58.00
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 Trimble EZ Guide 250 GPS Lightbar / AG15 Antenna NEW US $1,645.00
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 GPS Antenna Cable Type N Connectors US $85.15
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 Ag Leader Trimble GPS Antenna Cable EZ-guide 15' US $52.00
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 90° Ag Leader Trimble GPS Antenna Cable EZ-guide 25' US $62.00
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 Trimble ProXR Antenna - GPS, WAAS, Beacon. Pathfinder Pro XR US $349.00
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 JD GPS Antenna Bracket for Trimble Antenna john deere globe receiver RTK RTX US $99.00
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 Trimble R8 GPS Antenna Serial & Power Connectors Boards 48003-C GNSS GPS Survey US $59.99
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 Trimble R8 Survey GNSS GPS Antenna Module 55175-10 L1 L2 High Precision US $299.99
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 Trimble R8 Survey GNSS GPS Antenna Module 46062-00 L1 L2 High Precision US $299.99
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 Trimble EZ Guide 250 GPS Lightbar w/ AG15 Antenna Upgrade US $1,599.99
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 Raven Cruizer II w/ Helix Antenna Lightbar GPS Mapping Weather Resistant US $1,950.00
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Gps Antenna
Four Main Effects on GPS Antenna Performance
1, Ceramic Wafer: ceramic powders and sintering processes directly affect the quality of GPS Antenna performance. Now the market ceramic used is mainly in 25 × 25,18 × 18,15 × 15,12 × 12. Ceramic chip area is larger, the larger the dielectric constant, the higher the resonant frequency and the better is the receiving. Most of the ceramic wafer design is square, to ensure that the resonance in the XY direction is consistent, in order to achieve signal receiving well-distributed.
2, Silver Plate: the silver layer of ceramic antenna can affect the resonant frequency. Ideal frequency of GPS ceramic should fall 1575.42MHz on the nose, but the antenna frequency is vulnerable to affect by the surrounding environment, especially built in the machine, Therefore, have to adjust the silver-coated form, to make sure the frequency remained at 1575.42MHz .
3, The Feed Point: ceramic antenna collects resonance signal through the feed point and then sent to the backend. Since the antenna impedance matching reasons, feed is generally not in the center of the antenna, but doing minor adjustments in the XY direction. This impedance matching method is simple and has no extra cost. Move only in the uniaxial direction is called a single partial antenna, do move in two axes are referred to as double-side.
4, The amplifier circuit: to bear the shape and size of the PCB ceramic antenna. As GPS has the characteristics of ground bounce, when the background is 7cm × 7cm without a break earth, patch antenna performance can be to the limits. Although restriction by the appearance of the exterior structure and other factors, but try to maintain a considerable size and the same shape. Amplifier gain selection should be with the back-end LNA gain. Before the required signal input of Sirf's GSC3F, total gain shall not exceed 29dB, otherwise saturated signal will result in self-excited.
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