The **CSJ-RGFB-200-MHF3** is a high-frequency coaxial cable assembly primarily used in wireless communication and internal RF signal routing. This part belongs to the category of micro-miniature interconnects. --- ### 1. Component Overview This part number typically follows a specific nomenclature used by manufacturers (such as **Coaxial Components Corp** or similar RF specialists). It identifies the connector types, cable type, and length. | Feature | Specification | | :--- | :--- | | **Cable Type** | RG-178 or 1.13mm micro-coaxial (common for RGFB series) | | **Connector A** | MHF3 (I-PEX Micro-miniature connector) | | **Connector B** | SMA or Bulkhead Jack (depending on custom suffix) | | **Impedance** | 50 Ohms (Standard RF) | | **Length** | 200mm (Indicated by the "200" in the part number) | --- ### 2. Technical Breakdown #### A. The MHF3 Connector The **MHF3** is a 3rd generation micro-coaxial connector developed by I-PEX. * **Mated Height:** Very low profile, typically **1.5mm**. * **Frequency Range:** DC to 6 GHz. * **Application:** Ideal for ultra-thin devices like tablets, smartphones, and IoT modules where space is extremely limited. #### B. The Coaxial Cable The "RGFB" designation usually refers to a flexible, high-temperature fluorinated ethylene propylene (FEP) jacketed cable. * **Shielding:** Braided silver-plated copper or tinned copper to prevent Electromagnetic Interference (EMI). * **Dielectric:** PTFE (Teflon), which ensures low signal loss at high frequencies. #### C. Performance Characteristics * **VSWR (Voltage Standing Wave Ratio):** Usually ≤ 1.3 up to 3 GHz. * **Insertion Loss:** Dependent on the 200mm length; roughly 0.5dB to 1.2dB depending on frequency. * **Operating Temperature:** Typically -40°C to +90°C. --- ### 3. Common Applications These assemblies are essential for bridging the gap between a PCB-mounted radio module and an external antenna. 1. **Wi-Fi/Bluetooth Modules:** Connecting M.2 or Mini-PCIe cards to antenna ports. 2. **GPS/GNSS:** Routing signals in handheld navigation devices. 3. **IoT Gateways:** Connecting internal LoRa or Zigbee modules to chassis-mounted SMA connectors. 4. **Embedded Systems:** High-speed data transmission in compact industrial computers. --- ### 4. Comparison: MHF3 vs. U.FL (MHF1) While often confused, the MHF3 is significantly smaller than the standard U.FL connector. | Connector | Height (Mated) | Frequency Max | | :--- | :--- | :--- | | **U.FL (MHF1)** | 2.5 mm | 6 GHz | | **MHF3** | **1.5 mm** | **6 GHz** |