Wideband Wilkinson Splitter / Combiner

This project started out as a means to an end , faced with an excessive lead time to get a wideband splitter for students projects ( Their supervisor was at a conference ) , I remembered that Microwaves101 had a page on splitter designs , so searching the pages I found the " Wilkinson_multistage " design notes , then using my usual modelling package ( MicroWave Office ) I set about designing the splitters for the required " Octave " bandwidths , namely 1 - 2 GHz & 2 - 4 GHz , the resulting designs are shown below . The design was based upon using standard parts ( What was in stock ) rather than an " optimal " design with different values of balancing resistors as production of the protoypes was " Time Critical ".

The circuit is shown below and follows the normal design process of including ALL tracks & junctions to permit easy assembly without a pick & place system , just kitchen table or ordinary lab bench techniques , so look closely at the track widths for the balancing resistors and where they join the main transmission lines , they are the same width as the resistors meaning you place them exactly where the design shows .

Schematic For 1 - 2 GHz Splitter

Schematic for 2 - 4 GHz Splitter

Artworks for both Splitters

Graph of the 1 - 2 GHz splitter as modelled

Responses as measured for the 1 - 2 GHz splitter using FSH3 & RL Bridge

Graph of 2 - 4 GHz Splitter as modelled

Responses as measured for the 2 - 4 GHz splitter using FSH6 & RL Bridge

Mirrored Artwork for BOTH splitters ( Ready to print )

Back to homepage

This page last updated 11/09/2012