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Award ID contains: 2132229

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  1. ; (, IEEE)
    In microwave engineering, waveguides are a key component when transmitting high frequency waves with low losses. However, these are inherently bulky in size and difficult to integrate with other microwave components. Gap-Waveguides are a good solution for mm-wave frequencies since they are easier to integrate with other components and easier to fabricate since there is no need for a complete physical shield. This work uses gap-waveguide technology to develop a 4:1 power splitter network that can operate from 20 GHz to 40 GHz with very low losses and less than 2:1 VSWR. 
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  2. ; (, IEEE)
    This paper describes a methodology for designing feed networks for single-polarized aperture-coupled microstrip patch (ACMP) antennas with dual-offset microstrip feedlines. The method involves characterizing the effective series impedance of the antenna when it is fed in a balanced manner as a function of the distance between the dual feedlines. Fitting equations were generated from the data to relate the effective series impedance to the feed geometry, allowing the design of the matching network for any effective impedance. This work demonstrates that ACMP antennas can be coupled to dual-offset feedlines with λ/4 transformers and T-junctions with infinite combinations of impedance for the λ/4 transformer. A 10 GHz single-polarized ACMP antenna was designed and implemented obtaining satisfactory impedance matching. 
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