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¶ General Description
The Tango 20A is a compact screw-mount GNSS L1 puck antenna designed for reliable outdoor use. It covers the main L1 bands used by GPS, GLONASS, Galileo, BeiDou, QZSS and NavIC, delivering 22–24 dBiC top-hemisphere RHCP gain and a VSWR of 1.25 at L1 for efficient signal transfer, fast acquisition and stable satellite tracking in mobile and fixed installations.
An integrated low-noise amplifier (LNA) provides 28 dB gain to enhance received GNSS signals. The robust housing and fitted rubber seal provide IP68 protection when correctly installed, making the Tango 20A suitable for harsh outdoor environments. Its secure screw-mount design is well suited to applications such as commercial vehicle roofs, exterior vending machines and other permanently installed equipment.
The Tango 20A is supplied as standard with a 3 metre RG174 cable and SMA male connector. Alternative cable lengths and connector types are available on request for high-volume orders.
¶ Key Features
- IP68-rated with rubber seal to prevent water and dust ingress
- Triple-band GNSS support at 1561, 1575 and 1602 MHz
- Top-hemisphere RHCP gain of 22—24 dBiC
- Low-mismatch design with VSWR 1.25 at L1
- Durable, compact puck design with anti-theft protection
¶ Typical Applications
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Vehicle and fleet tracking
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Outdoor GNSS terminals and kiosks
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Industrial asset tracking
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Remote positioning and monitoring systems
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Navigation and telematics systems
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Multi-Constellation GNSS
1561, 1575 & 1602 MHz
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IP68 Rated
Outdoor Durability
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22–24 dBiC
RHCP Gain
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Active Antenna
Integrated LNA
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Through-Hole
Concealed Cable Mount
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¶ Electrical Specifications
| Impedance: | 50 Ohm |
| Polarisation: | RHCP |
| Frequency Range: | 1561–1602 MHz |
| Return Loss: | |
| 1561.098 MHz: | −16.67 dB |
| 1575.42 MHz: | −19.12 dB |
| 1602 MHz: | −13.40 dB |
| VSWR: | |
| 1561.098 MHz: | 1.34 |
| 1575.42 MHz: | 1.25 |
| 1602 MHz: | 1.54 |
| Filter Insertion Loss: | <3 dB |
| Peak RHCP Gain (Top Hemisphere): |
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| 1561.098 MHz: | 21.57 dBiC |
| 1575.42 MHz: | 22.60 dBiC |
| 1602 MHz: | 24.36 dBiC |
| Noise Figure: | <1.5 dB |
| Supply Voltage: | 2.2–5 V DC |
| Current Consumption: | 16–32 mA |
¶ Environmental Specifications
| Operating Temperature Range: | −40 °C to 85 °C |
| Storage Temperature Range: | −40 °C to 85 °C |
| Relative Humidity: | Up to 95% |
| Ingress Protection: | IP68 when installed with the supplied rubber seal |
¶ Mechanical Specifications
| Dimensions: | Ø 46 mm × H 14.5 mm |
| Housing Material: | ABS |
| Cable Type: | RG174 |
| Cable Length: | 3 m (standard) |
| Connector: | SMA Male |
| Mounting Method: | M10 screw thread |
| Maximum Material Thickness: | 4.5 mm |
¶ Spectrum Coverage*
| ↑ Suitable band | □ Adequate band in good signal conditions | ↓ Likely to be unsuitable |
¶ GNSS Standards Band Support
| Electrical Interface | Spherical RF Measurements | |||
|---|---|---|---|---|
| Centre Frequency (MHz) | VSWR | Return Loss (dB) | Average RHCP Gain (dBiC) | Peak RHCP Gain (dBiC) |
| 1561.098 (B1I) | 1.3443 | -16.6650 | 13.73 | 21.57 |
| 1575.42 (L1) | 1.2491 | -19.1159 | 15.22 | 22.60 |
| 1602 (G1) | 1.5435 | -13.4046 | 17.78 | 24.36 |
| Top Hemisphere RF Measurements | Zenith RF Measurements | ||
|---|---|---|---|
| Centre Frequency (MHz) | Average RHCP Gain (dBiC) | Peak RHCP Gain (dBiC) | RHCP Gain at Zenith (dBiC) |
| 1561.098 (B1I) | 17.79 | 21.57 | 18.91 |
| 1575.42 (L1) | 19.67 | 22.60 | 19.86 |
| 1602 (G1) | 21.61 | 24.36 | 23.41 |
¶ RF Matching Performance
This section illustrates the antenna's impedance matching characteristics across the operating frequency range using VSWR and Return Loss measurements.
¶ RF Zenith
¶ RF Top Hemisphere
¶ RF Spherical
The following graphs display the Average and Peak RHCP Gain across the entire spherical coverage of the antenna. These metrics provide a comprehensive view of the antenna’s ability to receive signals from satellites at all elevations and directions.
Consistently high gain across the sphere ensures strong and stable GNSS reception in a variety of operating conditions.
¶ ZX and YZ Plane Axial Ratio Plots (Zenith is at 0 degrees)
The following graph shows how well the antenna maintains circular polarisation at different elevation angles. A lower axial ratio ensures better GNSS signal reception, especially at low elevations, which is crucial for applications requiring strong performance in obstructed environments or wide-angle satellite visibility.
¶ Test Setup (in Free Space)
¶ 2D Radiation Plots
1575.42 MHz (L1)
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¶ 3D Radiation Plots
1575.42 MHz (L1)
¶ Ordering Details
| Part Number | Description |
|---|---|
| TANGO20/3M/SMAM/S/S/26 |
Active GPS L1 Screw-Mount Puck Antenna 3 m RG174 Cable and SMA Male Connector |