The **CSJ-RGFB-100-MHF3** is a specialized Radio Frequency (RF) coaxial cable assembly. It is commonly used in high-frequency wireless communication systems where space is limited and signal integrity is critical. --- ### 1. Technical Specifications Overview | Component | Specification | | :--- | :--- | | **Connector A** | SMA Bulkhead Jack (Female) | | **Connector B** | MHF3 (IPEX/U.FL Compatible, Micro-miniature) | | **Cable Type** | 0.81mm Coaxial Cable (Ultra-thin) | | **Impedance** | 50 Ohms (Standard RF) | | **Length** | 100mm (Standardized by "100" in the part number) | | **Frequency Range** | DC to 6 GHz | --- ### 2. Breakdown of the Electronic Parts #### A. SMA Bulkhead Jack (Female) * **Role:** This is the external interface. The "Bulkhead" design includes a nut and washer, allowing it to be mounted through a hole in a device enclosure/chassis. * **Material:** Usually gold-plated brass for superior conductivity and corrosion resistance. #### B. MHF3 Connector (Micro-miniature) * **Role:** This is the internal interface that snaps onto the Printed Circuit Board (PCB). * **Size:** The MHF3 is one of the smallest RF connectors, with a mated height of only **1.5mm**. It is smaller than the standard U.FL (MHF1) connector. * **Application:** Used in extremely thin devices like tablets, ultra-books, and M.2 wireless modules. #### C. 0.81mm Coaxial Cable * **Structure:** Consists of a silver-plated copper wire core, a FEP dielectric, a braided shield, and an outer jacket. * **Flexibility:** The 0.81mm diameter is highly flexible, allowing for tight routing inside compact electronic housings. --- ### 3. Key Applications * **Wireless Modules:** Connecting WiFi/Bluetooth M.2 cards to external antennas. * **IoT Devices:** Used in smart home sensors where PCB space is at a premium. * **Embedded Systems:** Industrial tablets or handheld GPS units. --- ### 4. Comparison: MHF3 vs. Standard U.FL | Feature | MHF1 (U.FL) | MHF3 | | :--- | :--- | :--- | | **Mated Height** | 2.5mm | 1.5mm | | **Frequency** | Up to 6 GHz | Up to 6 GHz | | **Durability** | ~30 Cycles | ~30 Cycles | | **Footprint** | 3.0mm x 3.0mm | 2.0mm x 2.0mm |