Does anybody know what this device is or what it is used for?
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1\$\begingroup\$ It looks like an RF power splitter to me (guesswork). \$\endgroup\$– Andy akaNov 20, 2022 at 18:54
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1 Answer
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It's a 4-way Wilkinson power divider/combiner. It can be operated in both directions.
Have a look at a similar 8-way example and more design details on microwaves101
answered Nov 20, 2022 at 19:11
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2\$\begingroup\$ Perfect answer! I'd add that that milled housing suggests it came from some military or at least commercial-grade equipment. It also looks like some hand-tuning was done to perfect the impedance matching, as evidenced by those extra tabs soldered on just beyond the series-kludged resistors, so I'd say it was an experimental prototype. \$\endgroup\$ Nov 20, 2022 at 19:40
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\$\begingroup\$ The mulitple sections means it's a wideband Wilky, as opposed to a fairly narrowband single section version \$\endgroup\$– Neil_UKNov 21, 2022 at 15:03