HE387B/HEM387B/HES387B integrated broadband amplifier, frequency range: 20 ~ 400MHz, with active bias design provides temperature compensation, good 50Ω impedance matching, easy to cascade, microwave thin film circuit structure, stable and reliable electrical performance, using standard fully sealed tube shell packaging, meet military working conditions: -55℃ ~ +85℃.
The HEM387B is an integration broadband amplifier covering a frequency range of 20 MHz to 400 MHz. It delivers a typical small‑signal gain of 25 dB with a gain flatness of about 0.5 dB and maintains VSWR values of 2.0:1 on both input and output ports. The device operates from a 12 V supply, drawing roughly 45 mA, and can output up to +7 dBm of power.
The amplifier is designed for reliable operation in harsh environments, with an operating temperature range of –55 °C to +85 °C and a maximum storage temperature of +125 °C. Physical dimensions follow the TO‑8 package, and the unit includes integrated components for easy installation. Detailed performance curves and pin‑out information are provided for system integration. This manual is written in Japanese.
| Frequency range | 20–400 MHz |
|---|---|
| Small‑signal gain | 25 dB |
| Gain flatness | ≈0.5 dB |
| Input VSWR | 2.0:1 |
| Output VSWR | 2.0:1 |
| Maximum output power | +7 dBm |
| Supply voltage | 12 V |
| Operating temperature | –55 °C to +85 °C |
| Maximum storage temperature | +125 °C |
| Typical supply current | 45 mA |
| OIP3 | 31 dBm |
It operates from 20 MHz up to 400 MHz.
The typical small‑signal gain is 25 dB.
The amplifier is powered from a 12 V supply.
It can operate from –55 °C to +85 °C.