Miniaturised branch-line balun with bandwidth enhancement |
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| Authors: | Li J-L Qu S-W |
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| Affiliation: | City Univ. of Hong Kong, Hong Kong; |
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| Abstract: | A miniaturised branch-line balun with bandwidth enhancement is investigated. The improved performance is achieved by meandering the branches and attaching a quarter-wavelength stub at the upper right corner of the conventional branch-line balun. Centred at 1.5 GHz, the introduced balun is optimally designed and validated by experiments. A circuit size of 20% is achieved as compared to the conventional type, and good electrical performance is observed. |
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