HE381B/HEM381B/HES381B integrated broadband amplifiers are a kind of amplifiers with frequency range of 20~500MHz, good 50Ω impedance matching, easy to cascade, and microwave thin film circuit structure.
The integration broadband amplifier supports a frequency range of 20 MHz to 500 MHz with good 50 Ω impedance matching. It operates in harsh environments from –55 °C to +85 °C and offers a small‑signal gain of about 11‑12 dB with a flatness of 0.5‑1.0 dB.
Installation notes include using C=3.3‑22 µF capacitors, compatibility with HP UTO‑544, SMA‑1 output connector, and reference dimensions provided in the accompanying drawing. The device requires a supply voltage of 115 V and can handle up to +10 dBm input power. This manual is written in Chinese.
| Frequency range | 20‑500 MHz |
|---|---|
| Impedance matching | 50 Ω |
| Operating temperature | -55 °C to +85 °C |
| Small‑signal gain (Gp) | 11‑12 dB |
| Gain flatness (AGp) | 0.5‑1.0 dB |
| Input VSWR | 2.0:1 typical, 1.5:1 max |
| Output power (Pout) | 12 dBm typical, 12.5 dBm max |
| Supply voltage (Va) | 115 V |
| Maximum input power | +10 dBm |
| Maximum storage temperature | 125 °C |
It operates from 20 MHz to 500 MHz.
The device works between –55 °C and +85 °C.
The small‑signal gain is about 11 dB to 12 dB.
The output uses an SMA‑1 connector.