The **ADP-RPSM-SMAF-G** is a high-frequency RF (Radio Frequency) adapter used to bridge connections between different interface standards. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. Part Number Decoding The alphanumeric string identifies the specific interface gender and polarity on each end: | Segment | Meaning | Description | | :--- | :--- | :--- | | **ADP** | Adapter | General category of the component. | | **RPSM** | RP-SMA Male | Reverse Polarity SMA connector with internal threads and a **socket** (hole). | | **SMAF** | SMA Female | Standard SMA connector with external threads and a **socket** (hole). | | **G** | Gold Plated | Indicates the plating finish, usually for superior conductivity and corrosion resistance. | --- ### 2. Technical Specifications Electronic parts like these are characterized by their ability to maintain signal integrity at microwave frequencies. | Feature | Specification (Typical) | | :--- | :--- | | **Impedance** | 50 Ohms (Standard for RF) | | **Frequency Range** | DC to 12.4 GHz (Standard) / up to 18 GHz (Precision) | | **VSWR** | ≤ 1.20:1 | | **Insertion Loss** | < 0.3 dB | | **Body Material** | Brass or Stainless Steel | | **Contact Plating** | Gold (minimum 3 micro-inches) | | **Insulator** | PTFE (Teflon) | --- ### 3. Key Electronic Functions * **Interface Conversion:** It converts a Standard SMA connection to a Reverse Polarity SMA connection. This is critical because Standard and RP connectors are physically incompatible to prevent accidental connection of high-gain antennas to consumer Wi-Fi equipment (per FCC regulations). * **Signal Integrity:** The internal gold-plated pin/socket ensures low contact resistance, while the PTFE dielectric maintains the constant 50-ohm impedance required to prevent signal reflections. * **Durability:** Rated for approximately 500 mating cycles. --- ### 4. Comparison: RP-SMA Male vs. SMA Female In this specific adapter, it is important to note the "Gender" vs. "Polarity" distinction: 1. **RP-SMA Male side:** Has a knurled nut (inside threads) but contains a **hole** (female center contact) instead of a pin. 2. **SMA Female side:** Has a threaded barrel (outside threads) and contains a **hole** (female center contact). ---