Unrivaled Precision: The MOP-DFA-206000 20-6000MHz Direction Finding Antenna
nnIn the demanding world of radio frequency (RF) surveillance and spectrum monitoring, the ability to capture and analyze signals with pinpoint accuracy is paramount. The MOP-DFA-206000 stands as a professional-grade solution, engineered to deliver exceptional performance across the entire 20-6000MHz spectrum. This tower-mounted antenna system seamlessly integrates a high-sensitivity direction finding (DF) capability with an active monitoring function, setting a new standard for reliability and precision in signal intelligence. By combining a sophisticated 5-element interferometer design with a fully integrated monitoring unit, this antenna ensures continuous, interference-free signal capture, making it an indispensable tool for government agencies, defense contractors, and spectrum management professionals.nn
Key Specifications for the MOP-DFA-206000
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| Parameter | Specification |
|---|---|
| Model Variants | MOP-DFA-206000 (TNC connectors) MOP-DFA-206000-01 (SMA connectors) |
| Frequency Range (DF) | Band A: 20 – 300 MHz; Band B: 300 – 1000 MHz; Band C: 1000 – 3000 MHz; Band D: 3000 – 6000 MHz |
| Nominal Input Impedance | 50 Ω |
| Antenna Type | 5-element DF interferometer (compatible with 5- to 2-channel receivers) |
| Polarisation | Vertical |
| Output Cables | RG 400 cables |
| DF Connectors | 20 x TNC male (MOP-DFA-206000) / 20 x SMA male (MOP-DFA-206000-01) |
| Monitoring Connector | 1 x N male (MOP-DFA-206000) / 1 x SMA male (MOP-DFA-206000-01) |
| Monitoring Frequency Range | 20 – 6000 MHz |
| Nominal H-Plane Beamwidth | 360° |
| Nominal E-Plane Beamwidth | 60° |
| Typical VSWR | 2:1 |
| Polarisation | Vertical |
| Connector Type (Monitoring) | N-type male |
| Nominal Impedance | 50 Ω |
| Input Voltage (via coax) | 13 – 24 V DC |
| Input Current | 150 mA |
| Power Consumption (nominal) | 2.25 W |
| OP1dB (typ.) | > 11 dBm |
| OIP2 (typ.) | > 31 dBm |
| OIP3 (typ.) | > 21 dBm |
| Typical Sensitivity (S/N = 0 dB, BW = 1 Hz) | |
| 20 – 100 MHz | -20 dBμV/m |
| 100 – 1000 MHz | -30 dBμV/m |
| 1 – 3 GHz | -35 dBμV/m |
| 3 – 6 GHz | -40 dBμV/m |
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The Engineering Behind the 20-6000MHz Direction Finding Antenna
nnThe core of this system is its advanced 5-element interferometer design. Unlike simpler antenna arrays, the interferometer uses full-size dipole elements across all four sub-bands (20-300 MHz, 300-1000 MHz, 1000-3000 MHz, and 3000-6000 MHz). This configuration delivers exceptional DF sensitivity, with an ultimate angular resolution that can fall well under 1° for strong signals across most of the 20-6000MHz range. This level of precision is critical for locating and tracking elusive transmitters, whether for interference hunting, regulatory enforcement, or tactical operations. The design also features excellent cross-polarisation rejection, which ensures stable and accurate reception even when signals arrive from unpredictable angles or in complex multipath environments.nn
Integrated Monitoring for Comprehensive Spectrum Awareness
nnWhat truly sets this 20-6000MHz direction finding antenna apart is its fully integrated active monitoring unit. This unit is mounted above the high-frequency DF module and is amplified at the cable top, with signals passively combined to maintain seamless omni-directional coverage. The system provides unrivaled omni-directional coverage on the same axis as the direction finding array, achieving zero interference between the two functions. This clever architectural choice allows for continuous signal capture across the entire 20-6000MHz spectrum via a single monitoring output connector, eliminating the need for a separate monitoring antenna. The result is a more compact, lightweight, and reliable installation that simplifies logistics and reduces the total cost of ownership.nn
Operational Flexibility and Robustness
nnThe antenna is designed to work seamlessly with both 5/2-channel phase-sensitive receivers, with optimization for 2-channel commutated receivers in the 1-6 GHz portion of the 20-6000MHz range. This compatibility ensures it can be integrated into existing signal intelligence infrastructure without major overhauls. Furthermore, the banded high sensitivity, ranging from -20 to -40 dBμV/m, allows it to detect even the faintest signals in challenging RF environments. Whether dealing with strong broadcast towers or weak, covert transmissions, the antenna adapts to deliver reliable data.nn
Mechanical Durability for Outdoor Deployment
nnThe MOP-DFA-206000 is built for the rigors of permanent outdoor installation. Its robust structural design supports rapid deployment and stowage, aided by included dust caps. The antenna is engineered to withstand punishing environmental conditions, including wind speeds of up to 160 km/h without ice load. The table below outlines its physical characteristics, confirming its suitability for long-term, unattended operation in virtually any climate.nn
| Parameter | Value |
|---|---|
| Cross-sectional wind area (without antenna switch) | 0.99 m² |
| Cross-sectional wind area (with antenna switch) | 1.05 m² |
| Maximum wind speed (without ice load) | 160 km/h |
| Assembled height | 3.60 m |
| Assembled diameter (max) | 2.70 m |
| Shipping dimensions | 2.20 m x 0.90 m x 0.60 m |
| Weight of antenna including shipping container | 60 kg (antenna) / 135 kg (total including container) |
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Conclusion: The Ultimate Choice for 20-6000MHz Direction Finding
nnIn conclusion, the MOP-DFA-206000 is more than just an antenna; it is a complete, high-precision RF detection and monitoring system. Its innovative combination of a 5-element interferometer and an interference-free active monitoring unit provides unparalleled performance across the entire 20-6000MHz spectrum. From its sub-degree angular resolution to its exceptional sensitivity and robust mechanical build, every aspect of this 20-6000MHz direction finding antenna is engineered for mission-critical applications. For professionals requiring the highest standards of signal intelligence, the MOP-DFA-206000 delivers the accuracy, reliability, and operational flexibility needed to stay ahead. Choose this antenna, and you invest in a solution that guarantees continuous, precise spectrum awareness for years to come.
