The **HG4971DP-30D-RSP** is a high-performance, professional-grade parabolic dish antenna manufactured by L-com (HyperLink brand). It is designed primarily for long-distance point-to-point (PtP) wireless networking. Below is a detailed breakdown of its electronic and physical specifications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Frequency Range** | 4900 - 5850 MHz (4.9 GHz - 5.8 GHz) | | **Gain** | 30 dBi | | **Polarization** | Dual Polarized (Horizontal and Vertical) | | **Horizontal Beamwidth** | 5 Degrees | | **Vertical Beamwidth** | 5 Degrees | | **VSWR** | < 1.5:1 | | **Front to Back Ratio** | > 35 dB | | **Connector Type** | 2 x RPSMA Female (Integrated into radio mount) | --- ### 2. Electronic Components & Features #### Dual Polarization (MIMO) This antenna features **dual-polarity** (Vertical and Horizontal) feeds. This allows the system to utilize MIMO (Multiple Input, Multiple Output) technology, effectively doubling the potential data throughput and increasing link reliability by providing two distinct paths for data transmission. #### High Gain (30 dBi) The 30 dBi gain is achieved through the physical parabolic shape, which focuses the radio frequency (RF) energy into a very narrow **5-degree beam**. This high level of concentration allows for communication over extremely long distances (often exceeding 20-30 miles depending on the radio power and environmental factors). #### Integrated Radio Bracket The "RSP" suffix indicates a specific radio mounting system. It is designed with a "slide-in" bracket on the rear of the dish, specifically compatible with **Ubiquiti Rocket®** and **Mimosa** radios. This eliminates the need for long coaxial cables, reducing signal loss (attenuation). --- ### 3. Structural and Environmental Build * **Dish Material:** Powder-coated aluminum for corrosion resistance and RF reflection efficiency. * **Radome Support:** Usually compatible with an optional radome to reduce wind loading and protect the feed horn from ice and debris. * **Mounting:** Heavy-duty tilt-and-swivel mast mount for precise alignment, which is critical for a narrow 5-degree beamwidth. --- ### 4. Applications * **Long Range Backhaul:** Connecting two buildings or sites miles apart. * **ISP Infrastructure:** Wireless Internet Service Providers (WISPs) using the 4.9GHz (Public Safety) or 5.8GHz (ISM) bands. * **High Interference Areas:** The narrow beamwidth and high Front-to-Back ratio help filter out noise from the sides and rear.