CATV Power Doubler Hybrid 1794 MHz 23 dB with the following Features :

• Excellent linearity
• Superior Return Loss
• Extremely low noise and distortion
• Unconditionally Stable under all Terminations

Intended for DOCSIS CATV Ampifiers and Optical Nodes.

The circuit is intended to be used as a CATV amplifier. They are usually used in an 75 Ω system. We do not broadcast any television signal. Instead we roast atoms in a vacuum chamber. That's why we use a 50 Ω environment. When connecting anything 75 Ω to anything 50 Ω, a mismatch loss will occur. This reduces the performance of the amplifier. By using this nifty calculator, we can verify, that the mismatch loss is ≈ 0.177 dB - not be a big deal.

PARAMETER	VALUE MEASURED / APPLIED / GUESSED
Supply	24 Volts DC
Current	410 mA, limited, R = 1.1 kΩ
Min. Freq.	45 MHz
Max. Freq.	1794 MHz
Gain S21	21 dB, somewhere in band
Max. Power	36 dBm, @ 284 MHz
Input Match S11	10 dB (minimum)
Output Match S22	10 dB (minimum)

This is a very easygoing gain block. It survived many years, even tortured hard by our physics students. In case you need more output power, the supply mayst be increased. Please bear in mind, that cooling must be double checked in that case. And yes, read that datasheet and consult an engineer.

We would like to thank the highly motivated staff of Qorvo Germany GmbH for their efforts to supply us (our research group at ETH zürich) with free samples.

ขอขอบพระคุณทุกท่าน.

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