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¶ General Description
The Delta 67 is a high-performance, active multi-band L1, L2, L5 & L6 GNSS terminal mount SMA stubby antenna designed to deliver highly accurate positioning, navigation and timing for precision applications without the need for a ground plane. Supporting all major global and regional satellite constellations, the Delta 67 provides comprehensive coverage across the primary GNSS L-band frequencies from 1176 MHz to 1602 MHz.
Its Quadrifilar Helix element and integrated LNA provide simultaneous multi-frequency reception, up to 39 dBiC top hemisphere RHCP gain and an axial ratio ≤ 1.83 dB. Broad sky coverage supports reliable satellite tracking for RTK positioning and precision timing systems.
The Delta 67’s compact, lightweight and power-efficient design suits external mounting on portable and handheld equipment, integration into UAVs, and high-precision, multi-constellation positioning for rugged asset trackers and autonomous vehicles.
¶ Key Features
- GNSS L1, L2, L5 & L6 coverage (1176–1602 MHz)
- QFH design with integrated LNA for all-sky reception
- SMA male connector for direct mounting
- Peak RHCP top hemisphere gain ≤ 39 dBiC; axial ratio ≤ 1.83 dB
- Compact, lightweight housing (Ø 27 mm)
¶ Typical Applications
- Precision surveying equipment
- Construction safety and infrastructure protection systems
- Autonomous vehicles and UAVs
- Machine control and intelligent transport systems
- Timing and synchronisation equipment
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Multi-Band GNSS
1176–1602 MHz
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Active Antenna
Integrated LNA
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RHCP Gain
≤ 39 dBiC
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QFH Design
Low-Elevation Reception
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Compact Direct Mounting
Simple Installation
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¶ Electrical Specifications
| Impedance: | 50 Ohm |
| Polarisation: | RHCP |
| Frequency Range: | 1176.45 – 1602 MHz |
| Return Loss: | ≥ -19.74 dB |
| VSWR: | ≤ 1.53 |
| Required Ground plane: | Free space |
| RHCP Gain (Top Hemisphere): |
≤ 39 dBiC |
| Axial Ratio at Zenith: | ≤ 1.83 dBiC |
| Supply Voltage: | 3 - 12 V DC |
| Current Consumption: | ≤ 55 mA |
¶ Environmental Specifications
| Operating Temperature range: | -40°C to 75 °C |
| Storage Temperature range: | -40°C to 75 °C |
¶ Mechanical Specifications
| Dimensions: | Ø = 27.05 mm H = 59.39 mm |
| Weight: | 16 g |
| Connector: | SMA Male |
| Mounting method: | Direct |
| Housing materials: | ABS Radome |
¶ Spectrum Coverage*
| ↑ Suitable band | □ Adequate band in good signal conditions | ↓ Likely to be unsuitable |
¶ GNSS Standards Band Support
| Electrical Interface | Spherical RF Measurements | |||||
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| Centre Frequency (MHz) | VSWR | Return Loss (dB) | Average RHCP Gain (dBiC) | Peak RHCP Gain (dBiC) | Median Axial Ratio (dB) | Minimum Axial Ratio (dB) |
| 1176.45 (L5) | 1.5276 | -13.6085 | 28.97 | 36.13 | 2.39 | 0.05 |
| 1202.025 (L3OC) | 1.3586 | -16.3620 | 31.19 | 38.93 | 2.45 | 0.05 |
| 1207.14 (E5B) | 1.4549 | -14.6433 | 30.44 | 38.58 | 2.42 | 0.09 |
| 1227.6 (L2) | 1.5166 | -13.7532 | 24.26 | 34.11 | 3.74 | 0.12 |
| 1246 (L20F/C) | 1.4465 | -14.7747 | 22.37 | 32.74 | 4.05 | 0.05 |
| 1268.52 (B3I) | 1.3131 | -17.3714 | 20.72 | 31.41 | 3.97 | 0.06 |
| 1278.75 (E6-I/Q) | 1.3725 | -16.0820 | 18.57 | 29.30 | 3.98 | 0.08 |
| 1561.098 (B1I) | 1.2438 | -19.2788 | 23.11 | 31.92 | 6.80 | 0.22 |
| 1575.42 (L1) | 1.2297 | -19.7419 | 22.43 | 30.73 | 6.28 | 0.09 |
| 1602 (L10F/C) | 1.2738 | -18.3871 | 24.09 | 31.59 | 4.96 | 0.07 |
| Top Hemisphere RF Measurements | Zenith RF Measurements | |||||
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| Centre Frequency (MHz) | Average RHCP Gain (dBiC) | Peak RHCP Gain (dBiC) | Median Axial Ratio (dB) | Minimum Axial Ratio (dB) | RHCP Gain at Zenith (dBiC) | Axial Ratio at Zenith (dB) |
| 1176.45 (L5) | 33.12 | 36.13 | 1.92 | 0.05 | 35.91 | 1.83 |
| 1202.025 (L3OC) | 35.99 | 38.93 | 1.70 | 0.05 | 38.87 | 0.68 |
| 1207.14 (E5B) | 35.68 | 38.58 | 1.58 | 0.09 | 38.58 | 0.38 |
| 1227.6 (L2) | 31.18 | 34.11 | 1.34 | 0.12 | 34.11 | 0.62 |
| 1246 (L20F/C) | 29.79 | 32.74 | 1.22 | 0.05 | 32.74 | 0.73 |
| 1268.52 (B3I) | 28.49 | 31.41 | 0.92 | 0.06 | 31.37 | 0.55 |
| 1278.75 (E6-I/Q) | 26.38 | 29.30 | 0.81 | 0.08 | 29.23 | 0.51 |
| 1561.098 (B1I) | 29.36 | 31.92 | 2.53 | 0.22 | 31.92 | 0.55 |
| 1575.42 (L1) | 28.26 | 30.73 | 2.80 | 0.09 | 30.79 | 0.12 |
| 1602 (L10F/C) | 29.25 | 31.59 | 2.41 | 0.07 | 32.16 | 0.43 |
¶ 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 graphs show 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
| 1176.45 MHz (L5) | ||
| XY | XZ | YZ |
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| 1202.025 MHz (L3OC) | ||
| XY | XZ | YZ |
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| 1207.14 MHz (E5B) | ||
| XY | XZ | YZ |
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| 1227.6 MHz (L2) | ||
| XY | XZ | YZ |
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| 1246 MHz (L20F/C) | ||
| XY | XZ | YZ |
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| 1268.52 MHz (B3I) | ||
| XY | XZ | YZ |
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| 1278.75 MHz (E6-I/Q) | ||
| XY | XZ | YZ |
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| 1561.098 MHz (B1I) | ||
| XY | XZ | YZ |
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| 1575.42 MHz (L1) | ||
| XY | XZ | YZ |
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| 1602 MHz (L10F/C) | ||
| XY | XZ | YZ |
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¶ 3D Radiation Plots
| 1176.45 MHz (L5) | 1202.025 MHz (L3OC) | 1207.14 MHz (E5B) |
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| 1227.6 MHz (L2) | 1246 MHz (L20F/C) | 1268.52 MHz (B3I) |
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| 1278.75 MHz (E6-I/Q) | 1561.098 MHz (B1I) | 1575.42 MHz (L1) |
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| 1602 MHz (L10F/C) | ||
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¶ Ordering Details
| Part Number | Description |
|---|---|
| DELTA67/X/SMAM/S/S/48 |
Compact Active Multi-Band Multi-Constellation GNSS Direct Mount Antenna SMA Male Connector |