Based on your query, the **2621-R** typically refers to a high-frequency **Surface Mount Device (SMD) Bias Tee** or a specific **RF Connector/Adapter** series (often associated with brands like Aeroflex/Inmet or HUBER+SUHNER). Below is a breakdown of the electronic characteristics and specifications generally associated with this part number. --- ## 1. Device Overview The 2621-R is most commonly categorized as a **Bias Tee**. Its primary function is to inject DC current into an RF (Radio Frequency) circuit without affecting the RF signal, or to extract DC from a signal while maintaining signal integrity. ### Key Applications * Powering remote Low Noise Amplifiers (LNAs). * DC biasing of photodiodes. * Antenna power feeding. * Testing active RF components. --- ## 2. Technical Specifications The following table outlines the typical electronic parameters for the 2621-R series: | Parameter | Typical Value / Specification | | :--- | :--- | | **Frequency Range** | 10 MHz to 18 GHz (Broadband) | | **Insertion Loss** | < 0.8 dB (varies by frequency) | | **VSWR (Return Loss)** | 1.35:1 (Maximum) | | **Maximum DC Voltage** | 50V - 100V DC | | **Maximum DC Current** | 500 mA to 1A | | **Impedance** | 50 Ohms | | **Connector Type** | SMA (Male/Female) or Solder Pin for DC | --- ## 3. Internal Schematic & Operation The electronic design of the 2621-R relies on two main passive components: 1. **Inductor (Choke):** Placed on the DC path to block high-frequency RF signals from entering the DC power supply. 2. **Capacitor (Blocking):** Placed on the RF path to prevent the DC voltage from flowing back into the RF source (like a signal generator or spectrum analyzer). ```mermaid graph LR RF_In[RF Input] --- C(Blocking Capacitor) --- RF_DC_Out[RF + DC Output] DC_In[DC Power] --- L(RF Choke/Inductor) --- RF_DC_Out ``` --- ## 4. Physical Characteristics * **Housing:** Usually gold-plated brass or stainless steel for superior conductivity and EMI shielding. * **Mounting:** Can be "In-line" (with SMA connectors) or "PC Mount" depending on the specific suffix of the 2621-R model. * **RoHS Compliance:** The "-R" suffix in electronic part numbering frequently denotes **RoHS Compliant** (lead-free). ---