The **M2AS1-4121-R/Q** is a specific technical designation for an **RF (Radio Frequency) Coaxial Cable Assembly**, typically utilized in high-frequency signal transmission environments. --- ### 1. General Specifications This part belongs to a family of high-performance RF interconnects. Below are the primary electronic and physical characteristics: | Property | Description | | :--- | :--- | | **Component Type** | RF Coaxial Cable Assembly | | **Connector A** | SMA Straight Plug (Male) | | **Connector B** | SMA Straight Plug (Male) | | **Cable Type** | Flexible or Semi-Rigid High-Frequency Coax | | **Impedance** | 50 Ohms (Standard for RF) | | **Frequency Range** | DC to 18 GHz (Typical for SMA) | | **Compliance** | RoHS / REACH Compliant | --- ### 2. Electronic Breakdown The part is designed to maintain signal integrity while minimizing loss. #### A. Characteristic Impedance The assembly is rated at **50 Ω**. This is the industry standard for most RF systems (WiFi, Bluetooth, Cellular) to ensure maximum power transfer and minimum reflection (VSWR). #### B. VSWR (Voltage Standing Wave Ratio) For a high-quality SMA assembly like the 4121 series, the VSWR is typically **< 1.35:1** at high frequencies. This indicates how much of the signal is reflected back to the source rather than transmitted through the cable. #### C. Attenuation (Insertion Loss) The "4121" suffix often denotes specific cable lengths or dielectric materials. Attenuation increases with frequency; however, these parts use high-grade PTFE (Teflon) insulation to keep loss minimal at gigahertz levels. --- ### 3. Structural Composition * **Center Conductor:** Usually gold-plated brass or beryllium copper for high conductivity and oxidation resistance. * **Dielectric:** PTFE (Polytetrafluoroethylene) provides the necessary spacing between the conductor and shield to maintain impedance. * **Outer Shield:** Braided or foil shielding to prevent Electromagnetic Interference (EMI) and leakage. * **Jacket:** Typically FEP or PVC, providing environmental protection. --- ### 4. Typical Applications * **Telecommunications:** Base station internal wiring. * **Aerospace:** High-reliability instrumentation and radar. * **Testing:** Used as test leads for Spectrum Analyzers or Network Analyzers. * **Medical:** Signal routing in imaging equipment.