Uniplanar de Ronde's CPW-slot directional couplers

A new uniplanar de Ronde's CPW-slot directional coupler was developed with good amplitude characteristics and phase balance. The even-odd mode analysis of four-port networks with double symmetry was used to analyze the uniplanar de Ronde's couplers. A directional coupler with 5-dB coupling was designed and demonstrated over the frequency range of 2.4-3.4 GHz. The experimental results agree with the theoretical design.<
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