The **SWC-192M-R1** is a high-performance **Millimeter-Wave (mmWave) End-Launch Waveguide to Coaxial Adapter**. It is primarily used in RF/Microwave engineering to interface rectangular waveguides with coaxial cables at extremely high frequencies. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Model Number** | SWC-192M-R1 | | **Waveguide Size** | WR-19 (U-Band) | | **Frequency Range** | 40.0 to 60.0 GHz | | **Connector Type** | 1.85mm (V) Male | | **Flange Type** | UG-383/U-M (Circular) | | **Insertion Loss** | 0.5 dB (Typical) | | **VSWR** | 1.25:1 (Typical) | | **Material** | Gold-plated Brass / Aluminum | --- ### 2. Physical & Electronic Components #### A. The Waveguide Interface (WR-19) The "WR-19" designation refers to the rectangular hollow metal pipe dimensions. In this part: * **Dimensions:** The opening is precisely $0.188" \times 0.094"$. * **Purpose:** It guides electromagnetic waves in the **U-band** (40-60 GHz) with minimal power loss compared to standard coaxial cables. #### B. The Coaxial Connector (1.85mm Male) Because standard SMA or K-connectors cannot handle frequencies up to 60 GHz without significant signal degradation (mode hopping), this part uses a **1.85mm (V-type)** connector. * **Air Dielectric:** Uses air as the primary dielectric to maintain impedance stability. * **Male Pin:** The "-R1" usually signifies a specific orientation or gender (Male in this instance). #### C. The Internal Transition (Taper) Inside the metal housing, there is a precision-machined "probe" or "step" transition. * **Electronic Function:** It transforms the transverse electric (TE10) mode of the waveguide into the TEM (Transverse Electromagnetic) mode of the coaxial cable. * **Impedance Matching:** This internal geometry is tuned to ensure the impedance stays as close to **50 Ohms** as possible across the entire 20 GHz bandwidth. --- ### 3. Application Use Cases * **5G/6G Research:** Testing high-frequency backhaul equipment. * **Radar Systems:** Used in automotive and aerospace radar modules. * **Test & Measurement:** Connecting a Vector Network Analyzer (VNA) to waveguide-based components like antennas or filters. ---