Super-compact equal/unequal half-mode substrate integrated waveguide filtering power dividers using complementary G-shaped resonator

ABSTRACTIn this paper, three super-compact equal/unequal filtering power dividers (FPDs) by combining the half-mode substrate integrated waveguide (HMSIW) platform and the metamaterial unit cell are proposed. To miniaturized the total dimension of the proposed equal/unequal FPDs, the evanescent mode technique, the half-mode technique, and the stepped-impedance resonator (SIR) technique have been utilized, simultaneously. In the modified metamaterial unit cell, which is called the complementary G-shaped resonator (CGR) unit cell, the quasi stepped-impedance slot line is replaced instead of the conventional slot line in the circular complementary split-ring resonator (CSRR) unit cell. Accordingly, the electrical size of the modified CGR unit cell is smaller than the conventional circular CSRR unit cell with the same physical sizes. Employing the introduced CGR unit cell and HMSIW structure, three equal/unequal FPDs with arbitrary power-dividing ratios have been designed and simulated. To illustration the performance of the proposed components, three HMSIW FPDs with different power division ratios of 1:1, 1:4, and 1:8 have been fabricated and measured. A reasonable agreement between simulated and measured results has been achieved. The results demonstrate that a miniaturization factor of about 0.64 is achieved.KEYWORDS: Compact sizearbitrary power divisionelectric dipolesevanescent mode techniquefiltering power divider (FPD)half-mode substrate integrated waveguide (HMSIW)metamaterial Disclosure statementNo potential conflict of interest was reported by the author(s).Authors’ contributionsMostafa Danaeian conceived of the presented idea, developed the theory and performed the computations. Mostafa Danaeian verified the analytical methods and discussed the results and contributed to the final manuscript.Availability of data and materialsData sharing is not applicable to this article as no new data were created or analyzed in this study.Ethical ApprovalThe paper reflects the author's own research and analysis in a truthful and complete manner.