cdsenet
Cdsenet TX170-TB-300 170MHz VHF Sucker Antenna 5.0dBi SMA-J 3m RG58
Cdsenet TX170-TB-300 170MHz VHF Sucker Antenna 5.0dBi SMA-J 3m RG58
10000 in stock
Couldn't load pickup availability
SKU:tx170-tb-300
Product Overview
The TX170-TB-300 is a 170MHz VHF external sucker antenna engineered for long-range wireless communication in the sub-200MHz band. It delivers a measured peak gain of 5.0 dBi and a typical VSWR of 1.31 at 170MHz, covering the 155–185MHz VHF range. A pure copper radiator, 82mm magnetic base, and 3-meter RG58 coaxial cable make it a field-deployable solution for industrial APs, wireless data transmission modules, and IoT telemetry systems requiring elevated external antenna placement. Updated March 2026.
Technical Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 155 – 185 MHz (Center: 170 MHz) |
| Peak Gain | 5.0 dBi |
| VSWR | ≤ 1.5 (Typ. 1.31 @ 170 MHz) |
| Impedance | 50 Ω |
| Connector Type | SMA-J (SMA Male, inner pin) |
| Cable | 3 m RG58 coaxial (UV-resistant jacket) |
| Magnetic Base Diameter | 82 mm |
| Radiator Material | Pure Copper |
| Max Input Power | 50 W |
| Operating Temperature | -40 °C to +85 °C |
| Compliance | RoHS |
| Last Updated | March 2026 |
Product Details
Pure Copper Radiator — Superior Conductivity at 170MHz
The TX170-TB-300 uses a high-purity copper rod radiator, which provides lower resistive loss than aluminum or steel alloy alternatives at VHF frequencies. At 170MHz, where antenna physical length approaches 440mm (quarter-wave), copper's superior conductivity directly contributes to the measured 5.0 dBi gain and VSWR of 1.31. The copper surface is treated to resist oxidation in outdoor environments, maintaining consistent RF performance over extended deployment periods.
82mm Magnetic Sucker Base — Large Ground Plane for VHF Optimization
The 82mm diameter magnetic base is larger than standard 62mm VHF sucker bases, providing a greater effective ground plane area that improves radiation efficiency and pattern symmetry at 170MHz. The strong magnet secures the antenna to any ferromagnetic metal surface — vehicle rooftops, equipment cabinets, or steel enclosure lids — without tools. The base can be repositioned without residue, supporting rapid field deployment and redeployment across multiple sites.
Professional Test Report
Measured with a vector network analyzer (Agilent E5071C equivalent): VSWR = 1.31 @ 170 MHz, confirming ≤1.5 across the full 155–185 MHz operating band. Return loss ≥ 16 dB at center frequency.
Ideal Applications
VHF Industrial Wireless Networking
Industrial APs and wireless data transmission modules operating at 170MHz for factory automation, SCADA systems, and long-range point-to-point links in open terrain.
Smart Infrastructure & Telemetry
Remote monitoring systems, pipeline telemetry, and utility infrastructure nodes requiring reliable VHF uplink with strong ground-wave propagation at sub-200MHz frequencies.
Vehicle & Mobile Deployment
Magnetic roof-mount deployment on fleet vehicles, survey equipment, and mobile command units for 170MHz VHF communication with rapid setup and repositioning.
Agricultural & Environmental Monitoring
Wide-area sensor networks for soil, weather, and irrigation monitoring using 170MHz VHF for improved ground-level propagation over long distances in rural environments.
Resources
📄 Download Datasheet (PDF)Frequently Asked Questions
Q: Does the TX170-TB-300 need to be frequency-matched to my wireless module?
A: Yes. The TX170-TB-300 is tuned for 155–185MHz (center 170MHz) and must be paired with a wireless module operating in this VHF band. Using it with a 433MHz, 915MHz, or 2.4GHz module will result in severe impedance mismatch, high VSWR, and significantly reduced communication range. Always verify your module's operating frequency before selecting an antenna.
Q: What is the advantage of the 82mm base over smaller magnetic bases?
A: At 170MHz, the antenna's quarter-wavelength is approximately 440mm, making the ground plane size a significant factor in radiation efficiency. The 82mm base provides a larger effective ground plane than standard 62mm bases, improving pattern symmetry and reducing ground-plane-induced VSWR variation. For optimal performance, mounting on a continuous metal surface larger than 200 × 200mm (such as a vehicle roof) is recommended.
Q: Can the antenna be mounted on a non-metallic surface?
A: The magnetic base requires a ferromagnetic metal surface to adhere and to function as a ground plane. Mounting on plastic, wood, or fiberglass will prevent the base from holding and will degrade radiation performance, potentially reducing gain by 2–3 dBi. For non-metallic surfaces, place a steel sheet (minimum 200 × 200mm) under the base to provide the required ground plane.
Q: Is this compatible with LoRa 433MHz or other sub-1GHz modules?
A: No. The TX170-TB-300 is specifically tuned for 155–185MHz. Using it at 433MHz will result in a VSWR exceeding 5.0 and a communication range reduction of 80% or more compared to a properly matched antenna. For 433MHz LoRa applications, use a dedicated 433MHz antenna such as the TX433-FPC series or TX433-PCB-3207.
Q: What is the operating temperature range and is the cable suitable for outdoor use?
A: The TX170-TB-300 is rated for -40°C to +85°C. The 3m RG58 cable jacket is UV-resistant and suitable for outdoor deployment. For rain or high-humidity environments, protect the SMA connector junction with self-amalgamating tape or a weatherproof boot to prevent moisture ingress at the connector interface.