Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
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4-way Wilkinson power splitter - RF Cafe Forums
RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media
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August of 2003 and was quite well-attended for many years. By 2010, Facebook and
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Forums activity dropped off precipitously. If the folks at
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sign-in from the major social media platforms, I would resurrect the RF Cafe Forums,
but until then it is probably not worth the effort. Regardless, there are still
lots of great posts in the archive that ware worth looking at.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: 4-way Wilkinson power splitter
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?
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?
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
The 4 100ohm resistor need to be between the outputs
of the spitters
to acheive good isolation.
That's my 1 cent
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.