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A new method to design a small-size ring coupler is proposed, showing that the coupler may be seen as consisting of fully distributed composite right/left-handed phase shifters. A 3 dB ring coupler is designed by using the proposed method. The coupler is analysed numerically and then experimentally characterised. It is shown that the experimental results are in very good agreement with the expected...
A small-size zeroth-order resonating antenna based on a composite right/left-handed transmission line (CRLH TL) fabricated on high resistivity silicon substrate using coplanar waveguides (CPW) is proposed. The CRLH TL consists of a series of CPW interdigital capacitors and parallel short-ended CPWs. The predicted and experimental results for return loss, gain and radiation pattern are in very good...
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