Design of an extremely miniaturized planar ring hybrid

In Ho Kang, Shu Zhong Sun
2013 Journal of the Korean Society of Marine Engineering  
This paper presents a method for analyzing and designing an extremely miniaturized planar ring hybrid, using the combination of parallel and diagonally shorted coupled lines. In contrast to conventional miniaturized coupled line filters, it is proven that the required electrical length of transmission line can be largely reduced to even a few degrees, not only effectively suppressing the spurious passband but also approximately maintaining the same characteristic around the stable center
more » ... cy. A ring hybrid filter at center frequency of 1 GHz was fabricated on the FR4 epoxy glass cloth copper-clad plat (CCL) PCB substrate. The insertion loss of a ring hybrid filter with the die area of 30 mm × 30 mm is -4.68 dB. Simulated results are well agreed with the measurements. Design of an extremely miniaturized planar ring hybrid
doi:10.5916/jkosme.2013.37.7.752 fatcat:kczhhkpaqzeynnymruk23uiopa