DESIGN OF A COMPLEX RATIO MEASURING UNIT USING ENHANCED BRANCH-LINE COUPLER FOR WIRELESS COMMUNICATION APPLICATIONS
DOI:
https://doi.org/10.11113/jt.v77.6284Keywords:
Passive component, CRMU, two-section, branch-line coupler, microstrip-slotAbstract
This article presents the complex ratio measurement unit (CRMU) design formed by enhanced 3-dB branch-line couplers (BLCs), which are placed symmetrically. The first CRMU is formed by four wideband 3-dB BLCs implementing Defect Ground Structure (DGS) and stub impedance techniques that operate over the frequency of 2.5 to 4 GHz. Meanwhile, the other CRMU is formed by four reduced size of enhanced two-section microstrip-slot BLCs with tight coupling of 3-dB over frequency of 2 to 5 GHz. The performances of the CRMU designs are observed and analyzed. The BLCs and CRMUs are designed using CST Microwave Studio. While, the S-parameter performances of the CRMUs are analyzed using Keysight’s Advanced System (ADS) software.
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