Abstract
AbstractA new type of microstrip coupler with complementary split‐ring resonator (CSRR) is proposed. The characteristic impedance of the even mode can be enhanced by etching CSRR structure in the grounded plane of a conventional microstrip parallel‐coupled coupler. This results in a higher degree of coupling. Based on the analysis of the odd and even modes, a new type of microstrip coupler was designed. The results of simulation and measurement show that the new coupler achieves a high degree of coupling (3 dB coupling) over a wide frequency band (38.1% relative bandwidth). © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1613–1616, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22522
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