### CA-RSPNMA004: Technical Overview The **CA-RSPNMA004** is a high-performance RF (Radio Frequency) coaxial cable assembly. It is primarily used to bridge the connection between wireless devices (like routers or access points) and external antennas. --- ### 1. Component Specifications This assembly consists of three main electronic parts: the cable itself and two distinct connectors. | Component | Specification | Description | | :--- | :--- | :--- | | **Cable Type** | LMR-195 (or equivalent) | A low-loss communication cable designed for high-frequency signals. | | **Connector A** | **RP-SMA Male** | Reverse Polarity SMA. Common on Wi-Fi routers/NICs. | | **Connector B** | **N-Type Male** | A large, threaded, weatherproof connector for outdoor antennas. | | **Impedance** | 50 Ohms | Standard impedance for RF transmission to minimize signal reflection. | --- ### 2. Breakdown of Parts #### A. The LMR-195 Coaxial Cable The "Electronic" core of the assembly is the cable, which consists of four layers: 1. **Inner Conductor:** Solid Copper-Clad Steel (CCS) or Solid Copper. This carries the actual high-frequency signal. 2. **Dielectric:** Physical Foam Polyethylene. This provides insulation and maintains the distance between the core and the shield to ensure stable impedance. 3. **Shielding:** A dual-layer system (Aluminum Tape + Tinned Copper Braid). This prevents **EMI (Electromagnetic Interference)** and keeps the signal from leaking out. 4. **Jacket:** Black PE (Polyethylene) or PVC, providing UV protection and environmental durability. #### B. RP-SMA Male Connector * **RP (Reverse Polarity):** Unlike a standard SMA, the RP-SMA Male has a **socket (hole)** instead of a pin, but uses the internal threading of a male connector. * **Application:** Specifically designed for Wi-Fi equipment to comply with FCC regulations regarding non-standard antenna connections. #### C. N-Type Male Connector * **Design:** A rugged, screw-on connector capable of handling frequencies up to 11 GHz. * **Function:** It features a center pin that mates with the N-Female port found on high-gain directional or omni-directional outdoor antennas. --- ### 3. Performance Characteristics * **Frequency Range:** Typically supports 0 to 6 GHz, covering 2.4GHz and 5GHz Wi-Fi bands. * **Signal Attenuation:** The LMR-195 cable is chosen because it offers significantly lower "loss" (dB drop) per foot compared to standard RG-58 cables. * **VSWR (Voltage Standing Wave Ratio):** Usually rated at <1.3:1, indicating efficient power transfer from the radio to the antenna.