## CONREVSMA007-R178 Technical Overview The **CONREVSMA007-R178** is a specialized RF (Radio Frequency) connector manufactured by **Linx Technologies** (now part of TE Connectivity). It is a **Reverse Polarity SMA (RP-SMA)** female jack designed for edge-mounting on printed circuit boards (PCBs). --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Connector Type** | RP-SMA (Reverse Polarity SMA) | | **Gender** | Jack (Female Socket) | | **Mounting Type** | PCB Edge Mount | | **Impedance** | 50 $\Omega$ | | **Frequency Range** | 0 to 18 GHz | | **Body Material** | Brass | | **Body Finish** | Gold Plating | | **Contact Material** | Beryllium Copper | | **Dielectric** | PTFE (Teflon) | --- ### 2. Physical Design & "Reverse Polarity" The most critical aspect of this part is the **RP-SMA** configuration. In standard SMA connectors, the Female jack has a socket. In **Reverse Polarity**, the physical threading remains the same, but the center pin configuration is swapped: * **RP-SMA Female:** Has external threads and a **male center pin**. * **RP-SMA Male:** Has internal threads and a **female center socket**. This was originally designed to prevent consumers from connecting high-gain professional antennas to consumer-grade Wi-Fi equipment. --- ### 3. Application and Usage * **Wi-Fi/WLAN:** Standard connector for 2.4GHz and 5GHz wireless networking hardware. * **IoT Devices:** Used in LoRa, Sigfox, and Zigbee gateways. * **PCB Edge Mounting:** The "R178" designation refers to the specific leg spacing designed to "sandwich" the edge of a PCB, typically for boards with a thickness of roughly 1.57mm (0.062"). --- ### 4. Component Layout (Footprint Example) When designing a PCB for this part, the landing pads are usually configured as follows: ```markdown Top Side PCB [ Signal Pad ] <--- Center Pin --------------------------- Bottom Side PCB [ Ground Pad ] <--- Structural Legs ``` ---