The **CSI-RGFB-300-UFFR-B** is a specialized high-frequency RF (Radio Frequency) cable assembly typically used in telecommunications, testing environments, and industrial wireless applications. Below is a breakdown of its electronic characteristics and components. --- ## 1. Component Specifications The part number follows a specific nomenclature that defines its electronic and physical properties: | Feature | Specification Details | | :--- | :--- | | **Cable Type** | RG-178 (High-temperature micro-coaxial) | | **Connector A** | U.FL (IPEX) Right Angle Female | | **Connector B** | SMA Bulkhead (Female) with O-ring | | **Impedance** | 50 Ohms (Standard RF impedance) | | **Length** | 300mm (approximately 11.8 inches) | | **Frequency Range** | DC to 6 GHz | --- ## 2. Key Electronic Parts & Materials The assembly consists of three primary electronic segments: ### A. The U.FL Connector (Micro-Miniature) * **Purpose:** To connect to the PCB (Printed Circuit Board). * **Electronic Property:** Designed for very low profile and small footprint; however, it has a limited mating cycle (usually ~30 cycles). * **Contact Plating:** Gold-plated center contact to minimize signal loss and prevent oxidation. ### B. The RG-178 Coaxial Cable * **Dielectric:** Usually PTFE (Teflon), which provides high insulation and thermal stability. * **Shielding:** Silver-plated copper braid. This provides high shielding effectiveness to prevent Electromagnetic Interference (EMI). * **Attenuation:** Since it is a thin cable (approx. 1.8mm diameter), it has higher signal loss (attenuation) over long distances compared to thicker cables like RG-58. ### C. The SMA Bulkhead Connector * **Purpose:** The external interface for antennas or external RF cables. * **Material:** Often brass with Gold or Nickel plating. * **Weatherproofing:** The "B" in the suffix often denotes a **Bulkhead** style with an O-ring, providing a moisture seal when mounted to an enclosure. --- ## 3. Signal Performance Summary ```markdown * VSWR (Voltage Standing Wave Ratio): < 1.35:1 up to 3GHz * Insertion Loss: ~0.5dB to 1.2dB (dependent on frequency) * Operating Voltage: 335V Max * Temperature Rating: -55°C to +155°C ``` --- ## 4. Typical Applications * **Wi-Fi/Bluetooth Modules:** Connecting internal M.2 or Mini-PCIe cards to external antennas. * **IoT Gateways:** Routing cellular (LTE/5G) or LoRa signals from the internal board to the chassis exterior. * **RF Prototyping:** Used in lab environments to bridge miniature board test points to standard SMA test equipment.