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3.7~4.2G Waterproof External antenna with SMA Male
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3.7~4.2G Waterproof External antenna with SMA Male

Specification:
Frequency Range:3.7~4.2GHz
Gain :5 dBi
VSWR : <1.92
Impedance : 50Ω
Power : 50W
Connector :SMA / N Connector
  • EX20009

  • Keesun

  • EX20009

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When mission-critical communications operate in the specialized C-Band and are deployed in harsh, exposed environments, hardware failure is not an option. Our 3.7–4.2 GHz Waterproof External Antenna with SMA Male Connector is specifically engineered to address this challenge. It provides a robust, high-performance link for next-generation 5G Fixed Wireless Access (FWA), specialized data telemetry, and industrial applications while ensuring maximum resistance against water, dust, and extreme weather. This is the Trustworthy solution for sustained, high-bandwidth operations in demanding external locations.

Engineered for Durability: True Waterproof Design

The "Waterproof" designation is paramount for any external antenna. This product is constructed with resilience in mind, demonstrating deep Expertise in environmental shielding.

  • High IP Rating: The antenna's housing and sealing mechanisms are designed to meet a high IP (Ingress Protection) rating (e.g., IP66 or IP67). This guarantees effective sealing against dust ingress and protects the internal components from powerful water jets or temporary immersion, ensuring the antenna remains functional regardless of torrential rain, snow, or humidity.

  • Rugged Materials: The external shell is typically made from UV-stabilized, high-impact materials (such as ABS or fiberglass) that prevent degradation from prolonged sun exposure and resist physical damage.

  • Secure Sealing: Special attention is given to the cable entry and the base mount to prevent moisture creep, a common point of failure in standard external antennas.

Professional Band Performance: 3.7 GHz to 4.2 GHz (C-Band)

This antenna is precision-tuned for the highly valuable 3.7 GHz to 4.2 GHz frequency range, which is crucial for modern high-capacity networks.

  • 5G Mid-Band Support: It provides exceptional stability and signal integrity for the 5G N77/N78 mid-band spectrum, enabling faster throughput and lower latency over significant distances, making it an Authoritative component for 5G FWA and private network deployments.

  • Wide Bandwidth: The full 500 MHz operational band ensures comprehensive compatibility with various communication protocols operating within this specialized frequency range, including incumbent satellite and licensed data links.

  • Minimized Loss: The internal structure is optimized to ensure a low VSWR, which, combined with the waterproof seal, guarantees that signal degradation due to environmental factors is kept to an absolute minimum.

Reliable Connection: The External SMA Male Standard

For industrial and professional external applications, the connector must be as reliable as the antenna itself.

  • SMA Male Connector: The SMA Male (M) (SubMiniature version A) connector provides a threaded, high-precision coupling that is the industry standard for high-frequency RF applications. It ensures a secure, physically stable, and electrically sound connection to the host device (such as a waterproof 5G router or gateway).

  • Integrated Sealing: The connector interface often includes supplementary rubber washers or gaskets designed to seal the junction with the device enclosure, further enhancing the overall waterproof integrity of the installation.

  • Compatibility: This antenna is the ideal companion for high-end industrial routers, professional IoT gateways, and specialized C-Band communication systems that feature an SMA Female port.

Ideal Use Cases for Maximum Reliability


The combination of the specialized 3.7–4.2 GHz frequency and its rugged Waterproof External construction makes this antenna essential for specific, high-stakes deployments:

  • Remote 5G FWA: Delivering reliable, high-speed broadband to remote homes, rural communities, or difficult-to-reach commercial sites.

  • Oil & Gas/Mining Operations: Providing durable, continuous connectivity for monitoring equipment, video surveillance, and telemetry in extreme weather conditions.

  • Smart City Infrastructure: Ensuring robust communication links for C-Band enabled street furniture, traffic monitoring, or utility meters.

  • Maritime Communications: Offering stable external mounting for vessels requiring C-Band data or GPS/GNSS backup services (if multi-functional).

By selecting the 3.7–4.2G Waterproof External Antenna with SMA Male, you are investing in a Helpful and robust solution that guarantees continuous, high-quality performance where standard antennas fail to survive or perform.


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Shenzhen Keesun Technology Co.,Ltd was founded in Aug of 2012, a high-tech enterprise specializing in various types of antenna and network cable manufacturing.

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