**HMC686LP4ETR: A High-Performance GaAs pHEMT MMIC Low Noise Amplifier from 17 to 24 GHz**

The **HMC686LP4ETR** is a state-of-the-art **Monolithic Microwave Integrated Circuit (MMIC)** low noise amplifier designed to deliver exceptional performance across the **K-Band frequency spectrum from 17 to 24 GHz**. This device is engineered to meet the demanding requirements of modern telecommunications, radar systems, and electronic warfare applications where signal integrity is paramount.

Fabricated using a high-reliability **0.15 µm GaAs pHEMT (Gallium Arsenide pseudomorphic High Electron Mobility Transistor)** process, the HMC686LP4ETR achieves an outstanding balance of low noise and high gain. It boasts a remarkably **low noise figure of 1.8 dB**, which is critical for preserving the integrity of weak signals in the receiver chain, ensuring superior system sensitivity. Simultaneously, it provides a high **small-signal gain of 22 dB**, effectively amplifying desired signals far above the noise floor of subsequent stages in the system.

The amplifier is designed for ease of integration into a variety of microwave assemblies. It requires a single positive supply voltage between +3V and +5V, drawing a typical current of 80 mA. The **LP4 surface-mount package** is optimized for high-frequency performance and facilitates straightforward PCB layout. Furthermore, the device is internally matched to 50 Ohms at both its input and output, simplifying the design process and reducing the need for external matching components. It also features on-chip DC blocking capacitors and RF bypass capacitors, making it a truly complete solution.

Key applications for the HMC686LP4ETR include:

* **Point-to-Point and Point-to-Multi-Point Radios**

* **Military and Commercial Radar Systems (e.g., fire control, seeker heads)**

* **Satellite Communication (SATCOM) terminals**

* **Test and Measurement Equipment**

* **Electronic Countermeasures (ECM) and Electronic Warfare (EW) systems**

**ICGOOODFIND:** The HMC686LP4ETR stands out as a premier solution for K-Band systems, offering an exceptional combination of **ultra-low noise figure and high linearity** in a compact, easy-to-use package. Its robust performance across the entire 17-24 GHz band makes it an ideal choice for designers seeking to maximize receiver sensitivity and dynamic range in critical communications and radar applications.

**Keywords:** **GaAs pHEMT**, **Low Noise Amplifier (LNA)**, **K-Band**, **Noise Figure**, **MMIC**