The **HG4971DP-34D-RSP** is a high-performance, professional-grade parabolic dish antenna manufactured by L-com (HyperLink). It is specifically designed for long-range, point-to-point wireless communications. Below is a detailed breakdown of its electronic and technical specifications. --- ### 1. Primary Technical Specifications This antenna operates in the licensed and unlicensed bands near 5 GHz, providing high gain and narrow beamwidth for long-distance links. | Feature | Specification | | :--- | :--- | | **Frequency Range** | 4.9 GHz to 5.8 GHz | | **Gain** | 34 dBi | | **Polarization** | Dual Polarized (Vertical & Horizontal or X-Pol) | | **Horizontal Beamwidth** | 3.5° | | **Vertical Beamwidth** | 3.5° | | **Impedance** | 50 Ohm | | **Max Input Power** | 100 Watts | | **VSWR** | < 1.5:1 (Average) | | **Front to Back Ratio** | > 40 dB | --- ### 2. Key Electronic Components & Design The "Electronic" functionality of this passive component is defined by its RF (Radio Frequency) architecture: #### A. Dual Polarization Feed Horn The "DP" in the part number stands for **Dual Polarized**. * **Function:** It features two separate feed systems within a single housing. * **Benefit:** This allows the antenna to transmit and receive data on two different planes (Horizontal and Vertical) simultaneously. This effectively doubles the bandwidth (MIMO - Multiple Input, Multiple Output) and provides better signal stability in noisy environments. #### B. RSP (RP-SMA Connector Interface) The "RSP" suffix indicates the connector type integrated into the pigtail cables or the chassis. * **Connector Type:** RP-SMA Jack (Reverse Polarity SMA). * **Compatibility:** This is the standard connector for most commercial outdoor wireless access points and bridge radios (like those from Ubiquiti, MikroTik, or Mimosa). #### C. Parabolic Reflector The dish acts as a passive electronic amplifier (Gain). * **Geometry:** The 0.9-meter (approx. 3-foot) diameter dish focuses the RF energy into a very narrow 3.5-degree beam. * **Material:** Typically constructed from UV-stable aluminum to prevent signal degradation and provide electrical shielding from rear-interference. --- ### 3. Application Use Cases Because of its high gain and narrow beamwidth, this part is used in specific electronic deployments: 1. **Backhaul Links:** Connecting two towers or buildings over distances exceeding 20-30 miles. 2. **Public Safety Band:** Supports the **4.9 GHz** band often reserved for law enforcement and emergency services. 3. **ISP Infrastructure:** Used by WISPs (Wireless Internet Service Providers) to bring high-speed internet to rural areas. ---