The **HPA-13-R** is an electronic component primarily classified as a **Passive Low-Pass Filter (LPF)**, commonly used in radio frequency (RF) and telecommunications systems. This specific part is manufactured by **Mini-Circuits**. --- ## 1. Core Technical Specifications The HPA-13-R is designed to allow signals below a specific frequency to pass through with minimal loss while significantly attenuating higher frequencies. | Parameter | Value / Specification | | :--- | :--- | | **Passband** | DC to 13 MHz | | **Stopband (Rejection)** | Typically starts above 18-20 MHz | | **Insertion Loss** | < 1.0 dB (in passband) | | **VSWR** | 1.3:1 (Typical) | | **Power Handling** | Low power (Signal level) | | **Impedance** | 50 Ohms | --- ## 2. Key Electronic Features * **RoHS Compliant:** The "-R" suffix indicates that the part is compliant with Restriction of Hazardous Substances regulations (Lead-free). * **Plug-in Package:** It typically comes in an 8-pin hermetically sealed metal header (Case Style A01), providing excellent shielding from electromagnetic interference (EMI). * **Passive Architecture:** It consists of an LC (Inductor-Capacitor) network. It does not require an external power supply to function. * **Wide Temperature Range:** Designed to operate in harsh environments, usually from -55°C to +100°C. --- ## 3. Application Areas The HPA-13-R is used in circuits where high-frequency noise needs to be removed from a signal path: 1. **Harmonic Suppression:** Removing unwanted harmonics from local oscillators or signal generators. 2. **Anti-Aliasing:** Used before an Analog-to-Digital Converter (ADC) to ensure signals above 13 MHz do not cause aliasing. 3. **Transmitter Clean-up:** Filtering out-of-band emissions in communication equipment. 4. **Test Instrumentation:** Providing clean signal paths in laboratory measurement setups. --- ## 4. Connection Diagram (Typical) The internal structure is usually symmetrical, allowing for standard input/output matching. ```text [Internal LC Network] Input O----( L1 )----( L2 )----O Output | | ( C1 ) ( C2 ) | | GND -------------------------- GND ```