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Model: SM-18
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Mobile GPS antenna featuring extremely low voltage without compromising its high gain
** Universal Connectors **
** Universal Connectors **
Overview
SM-18 is the integration of a high performance GPS patch antenna and a state-of-the-art low noise amplifier into a very low profile, extremely compact and fully waterproof enclosure which, when connected to a GPS receiver with 1.8V to 5.0V antenna power, provides excellent signal amplification and out-band filtering & rejection.
Features
- Ultra-low input voltage with high gain
(Input Voltage as Low as 1.8V ; Overall Gain as High as 25 dB) - Compatible with Garmin iQue series
- Excellent temperature stability / Magnet or screw mount base
- Low noise figure / Fully weather proof / Compact construction
-
New Universal Connector adapter
*Screw Mounting Base Optional
Installation
- Secure your SM-18 antenna to the top of your vehicle and carry its cable into the vehicle.
- Link the cable connector to your GPS receiver.
- Start with your navigation.
Mechanical Drawing
Specification
ANTENNA ELEMENT |
|
| Center Frequency | 1575.42 MHz +/- 1.023 MHz |
| Polarization | R.H.C.P. (Right Hand Circular Polarization) |
| Absolute Gain at Zenith | +5 dBi typically |
| Gain at 10ºElevation | -1 dBi typically |
| Axial Ratio | 3 dB max. |
| Output VSWR | 1.5 max. |
| Output Impedance | 50 Ω |
LOW NOISE AMPLIFIER |
|
| Center Frequency | 1575.42 MHz +/- 1.023 MHz |
| Power Gain | 25 dB typically |
| Band Width | 2 MHz min. |
| Noise Figure | 2.5 max. |
| Supply Voltage | +1.8 ~ +5.0V DC |
| Current Consumption: | 20mA |
| VSWR | 2.0 max. |
| Output Impedance: | 50 Ω |
CABLE & CONNECTOR |
|
| RF Cable | 5 meter RG174/U (standard), with other optional length |
| Pulling Strength | 6 Kg./5 sec. |
| Connector Available | BNC, TNC, FME (to be adapted), GT5, MCX (OSX), SMA, SMB or SMC in straight or right angle type |
| Optional Adapters | FME~MCX, FME~BNC, FME~SMA, FME~SMB, FME~TNC |
OVERALL PERFORMANCE (Antenna Element, LNA & Cable) |
|
| Center Frequency | 1575.42 MHz |
| Power Gain | 25 dB typically |
| Noise Figure | 2.0 max. |
| Axial Ratio | 3 dB max. |
| VSWR | 2.0 max |
| Output Impedance | 50 Ω |
Environmental Conditions |
|
| Operating Temperature | -40 ºC~+85 ºC |
| Storage Temperature | -50 ºC~+95 ºC |
| Relative Humidity | 5% to 95 %, non-condensing |
| Waterproof | 100% waterproof |
PHYSICAL CHARACTERISTICS |
|
| Construction | Polycarbonate-radome at top and die-cast shell at bottom |
| Dimension | 58mm (L) x 48mm (W) x 15mm (H) |
| Weight | 63 grams (excluding cable & connector) |
| Standard Mounting | 2 magnetic mounts, screw mount with 2 M3 tapped holes on the base |
| Optional Mounting Plate | Metal flanges with holes for permanent mount |
(Specification subject to change without prior notice.)
Data Updated: August 30, 2005
