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Progress In Electromagnetics Research
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ON THE POSSIBILITY OF A PERFECT POWER COMBINER

By S. He and K. Liu

Full Article PDF (626 KB)

Abstract:
By reductio ad absurdum, we show that a perfect power combiner of single-mode waveguides is impossible for incoherent input waves of the same frequency and same polarization as it is against the law of conservation of energy. The inevitable 3 dB loss of a three-port power combiner is explained physically. An incoherent power combiner of nearly 100% efficiency can be realized only if the two input fields have different wavelengths, have different polarizations, or are of orthogonal modes.

Citation:
S. He and K. Liu, "On the Possibility of a Perfect Power Combiner," Progress In Electromagnetics Research, Vol. 158, 1-6, 2017.
doi:10.2528/PIER16092302
http://www.jpier.org/PIER/pier.php?paper=16092302

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