The **LPD-21PB-R** is a high-performance **Broadband 2-Way Power Divider/Combiner** typically used in RF (Radio Frequency) and microwave communication systems. It is designed to split an input signal into two equal-phase output signals or combine two signals into one. Below is a breakdown of its technical specifications and core electronic characteristics. --- ### 1. Key Technical Specifications The performance of an RF power divider is defined by its frequency range, insertion loss, and isolation. | Parameter | Typical Value / Range | | :--- | :--- | | **Frequency Range** | 0.5 GHz to 18 GHz (Wideband) | | **Configuration** | 2-Way (1 Input, 2 Outputs) | | **Insertion Loss** | ≤ 1.5 dB (above 3dB theoretical split) | | **Isolation** | ≥ 18 - 20 dB | | **VSWR (Input/Output)** | ≤ 1.5:1 | | **Amplitude Balance** | ± 0.3 dB | | **Phase Balance** | ± 4° | | **Power Handling** | 20W (Forward) / 1W (Reverse) | | **Connector Type** | SMA-Female | --- ### 2. Electronic Components & Design The LPD-21PB-R is based on the **Wilkinson Power Divider** architecture. Its internal construction includes several critical elements: * **Microstrip Transmission Lines:** The internal PCB uses precision-etched copper traces on a low-loss dielectric substrate (like Rogers or Arlon) to maintain a 50-ohm characteristic impedance. * **Isolation Resistor:** A high-precision surface-mount resistor is connected between the two output ports. This resistor dissipates "difference" signals, ensuring that reflections from one output port do not interfere with the other. * **Quarter-Wave Transformers:** The internal traces are calculated to be one-quarter wavelength ($\lambda/4$) at the center frequency to match the impedance between the 50Ω input and the two 50Ω outputs. --- ### 3. Functional Applications This part is commonly integrated into the following systems: 1. **Antenna Arrays:** To feed signal power equally to multiple antenna elements. 2. **Test & Measurement:** Splitting a source signal to both a Device Under Test (DUT) and a Reference Power Meter. 3. **Signal Combining:** Merging two low-power signals into a single transmission line for amplification. 4. **Radar Systems:** Distributing local oscillator (LO) signals across different receiver modules. --- ### 4. Physical Characteristics * **Housing:** Usually an aluminum gold-plated or chemically filmed enclosure for EMI/RFI shielding. * **Operating Temperature:** Typically rated for **-45°C to +85°C**, making it suitable for aerospace and military environments.