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27. April 2024
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Amplifier_BONLab_81.php 6165 Bytes 23-04-2024 07:22:52
Broadband UHF Amplifier BONLab-81
A small helper for the lab. Designed in Khon Kaen. Made in Zürich.
The Prototype.
✈ Hardware Description
This design uses a GVA-81+ (SMT Gain Block, DC - 6000 MHz, 50Ω, MCL) as it has the necessary Gain of 10 dB and an 1-dB compression
close to +20 dBm. The Bias is handled by a TCBT-14+ (Bias Tee, 50Ω Wideband 10 MHz to 10 GHz, MCL)
On the DC side, a Schottky Diode protects the circuit in case of wrong polarity applied. Some decoupling capacitors ensure a smooth supply. A 1 Ω Resistor allows for current measurements as well as an overvoltage protection. The circuit should be supplied with +5.2 V. It draws around 106 mA. Increasing the supply does not increase the Gain.
The gain at 3 GHz is slightly below the typical data, as FR4 starts degrading above 2 GHz.
On the DC side, a Schottky Diode protects the circuit in case of wrong polarity applied. Some decoupling capacitors ensure a smooth supply. A 1 Ω Resistor allows for current measurements as well as an overvoltage protection. The circuit should be supplied with +5.2 V. It draws around 106 mA. Increasing the supply does not increase the Gain.
The gain at 3 GHz is slightly below the typical data, as FR4 starts degrading above 2 GHz.
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