Open and Short Stubs Employing the Periodically Arrayed Grounded-strip Structure on the Silicon Substrate and Their Application to Miniaturized RF Filters on the Silicon RFIC

In this work, open and short stubs that were fabricated on the silicon substrate and for which the periodically arrayed grounded-strip structure (PAGS) was employed were studied along with their basic RF characteristics for an applicability regarding the RF-matching components. The PAGS-employing open and short stubs showed losses that are much lower than that of the conventional stub on the silicon substrate. Concretely, the Q values of the open and short stubs are 9 and 10.2, respectively, while the Q value of the conventional open stub is 2.5. With the use of the PAGS-employing open and short stubs, a highly miniaturized harmonic-rejection filter was also fabricated on the silicon substrate. The filter exhibited a comparatively sound harmonic-suppression characteristic at n × 13 GHz, and its size is 0.1 mm 2 , which is only 7% of the size of the conventional filter on the silicon substrate. Periodically arrayed grounded-strip structure (PAGS), RF characteristics, Harmonic-rejection filter, Harmonic-suppression characteristics