Abstract
A novel narrow-band balanced filtering network using coupled lines loaded with stubs is proposed in this letter. Two Wilkinson power dividers using coupled lines are used to realise the six-port balanced network. Wideband common mode suppression and power division isolation can be achieved due to the loaded open/shorted stubs. A narrow-band balanced filtering network for the WLAN band is designed. Good agreements can be found between the simulation and measurement results.
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