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4-way Wilkinson power splitter - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


RF_Guy
Post subject: 4-way Wilkinson power splitter
Unread postPosted: Wed Dec 29, 2004 10:54 pm

I would like to design a four-way Wilkinson power splitter at 100 MHz. I would like to split the 1 W power in to two Wilkinson splitters, starting the design on microstrip. The four, quarter wavelength would be realised using 75-Ohm coaxial cable, and each cable would terminate in to 50 Ohm. My question is could I place the two 100-Ohm resistors at the start off each separate pair of ¼ wavelength coaxial splits on the circuit board?

Thanks. :oops:


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Guest
Post subject:
Unread postPosted: Mon Jan 24, 2005 6:09 pm

Can I have more info to help you. Are you saying to start with a characteristic impedance of 75 ohms and end it with 50 ohms?


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Rod
Post subject:
Unread postPosted: Wed Jan 26, 2005 1:16 pm

I'm sure the Zo = 50ohms. For a Wilkinson Splitter the quarte wave lines = Z = 50 * (SQRT)2.

Which is 70.7 ohms, 75 coax is usually close enough.

The 4 100ohm resistor need to be between the outputs of the spitters
to acheive good isolation.

That's my 1 cent


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mick
Post subject:
Unread postPosted: Sat Mar 26, 2005 9:44 am

Sorry guys, you're on the wrong track here - at 100Mhz use lumped elements , unless you like wasting money on coax cable.

I have sucessfully used lumped element wilkos at 500 MHz.



Posted  11/12/2012
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