The **2822HC90-R** is a high-performance **Directional Coupler** typically used in RF (Radio Frequency) and microwave applications. It is designed to sample a specific amount of electromagnetic power from a transmission line without significantly interrupting the main signal flow. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the 2822HC90-R: | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Directional Coupler / Hybrid Coupler | | **Frequency Range** | Typically HF/VHF/UHF (Depends on specific sub-series) | | **Coupling Value** | 90 Degree (Quadrature Hybrid) | | **Power Handling** | High Power (indicated by "HC" - High Current/Power) | | **Impedance** | 50 Ohms | | **RoHS Status** | Compliant (indicated by "-R") | --- ### 2. Functional Analysis The "90" in the part number usually signifies a **90° Hybrid Coupler** (also known as a Quadrature Hybrid). * **Signal Splitting:** When a signal enters the Input port, it is split into two equal-power signals. * **Phase Shift:** One output signal lags the other by exactly 90 degrees. * **Isolation:** These parts are designed to provide high isolation between the input and the isolated ports, ensuring signal integrity and preventing reflections. ### 3. Electronic Composition This part is typically a **Passive Component** constructed using: 1. **Ceramic Substrate:** High-frequency low-loss ceramic material for thermal stability. 2. **Thick/Thin Film Conductors:** Precise metallic traces that define the coupling coefficient. 3. **Termination Resistors:** Often used internally or externally to dissipate unused power at the isolated port. --- ### 4. Common Applications * **Power Amplifiers:** Used to combine the outputs of two power amplifier transistors to achieve higher power levels. * **Phase Shifters:** Utilized in antenna arrays to control signal direction. * **Mixers/Modulators:** Used in I/Q (In-phase and Quadrature) modulation schemes. * **VSWR Measurement:** To monitor the reflected power in a transmission line to protect sensitive equipment.