The **WMS2-22-R/Q** is a high-performance, ultra-compact **RF (Radio Frequency) Reflectionless Low Pass Filter** manufactured by Mini-Circuits. It is designed using GaAs (Gallium Arsenide) IPD (Integrated Passive Device) technology. Below is a breakdown of its technical specifications and electronic characteristics. --- ## 1. Core Technical Specifications The primary function of this part is to pass low-frequency signals while absorbing (rather than reflecting) high-frequency stopband signals. | Parameter | Specification | | :--- | :--- | | **Filter Type** | Reflectionless Low Pass | | **Passband Frequency** | DC to 2200 MHz | | **Stopband Frequency** | 3500 to 20000 MHz | | **Insertion Loss (Passband)** | 1.2 dB (Typical) | | **Stopband Rejection** | 14 dB (Typical) | | **Operating Temperature** | -55°C to +105°C | | **Package Style** | MCLP™ (2x2mm, 12-lead) | --- ## 2. Key Electronic Features ### A. Reflectionless Design Unlike traditional filters that reflect unwanted signals back to the source (which can cause instability in mixers or amplifiers), the WMS2-22-R/Q **absorbs** signals in the stopband. * **VSWR:** It maintains a low VSWR (Voltage Standing Wave Ratio) across both the passband and stopband. * **System Stability:** This prevents intermodulation distortion and ringing in the signal chain. ### B. GaAs IPD Technology The device is fabricated using **Gallium Arsenide Integrated Passive Device** technology. * This allows for extremely small physical dimensions (2x2mm). * It provides high repeatability and excellent performance at microwave frequencies up to 20 GHz. ### C. Power Handling * **Max Input Power:** Typically handles up to +34 dBm (2.5 Watts) in the passband. * **ESD Sensitivity:** As a GaAs device, it is sensitive to electrostatic discharge (Class 1A rating). --- ## 3. Pin Configuration & Integration The device is housed in a 12-lead plastic overmold package with an exposed paddle for grounding. | Pin Number | Function | Description | | :--- | :--- | :--- | | **2** | RF IN | Input port for the signal | | **8** | RF OUT | Output port for the filtered signal | | **Others** | GND | Must be connected to ground for heat dissipation and RF performance | --- ## 4. Typical Applications * **Transceivers:** Used to eliminate harmonics without disrupting the mixer. * **Military & Aerospace:** High reliability in harsh temperature environments. * **Test and Measurement:** Used in wideband equipment to provide clean signal paths. ---