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General Purpose 2 Way Distribution Amplifiers
DA1-2 Manual - including circuit descriptions, typical performance, circuit diagrams and
PCB overlays etc - click here
The DA1_2 provides a 2 way split ooutput from an RF input signal down to approx 1MHz, and up beyond 3.4GHz. As supplied the kit contains no attenuator components
to configure the gain. There are three attenuator positions available within the unit:
- an input attenuator to avoid overdriving the MMIC (BGA616)
- an output attenuator for each output, enabling the gain to be set independently on each.
All attenuators are Pi types - suitable resistor values can be looked up from the table
There are no frequency shaping components in this amplifier, so it is broadband - however, it would be easy to
implement lowpass Pi filters in
place of one or more of the attenuators, using 0805 size L and C elements.
The architecture of this unit is a MMIC amplifier, followed by a resistive 2 way divider.
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| DA1-2 gain from 10 to 1800MHz. 0dB is second line from top |
DA1-2 gain comparison 2-3.4GHz. Lower trace is ref, Mkr at 2.3GHz |
Completed DA1-2 sample |
The gain measurements shown above are with 0dB attenuation configured in the module, and 0dBm nominal input level.
Gain at 10MHz is approx 12.5dB per channel, dropping to approx 4dB per channel at 3.4GHz.
All unused outputs should be terminated in 50R for correct performance.
For kit availability and price please see the Orders page.
Page created: 29.07.2008
Last updated: 31.07.2008