A smaller step impedance line Wilkinson power divider with an improved better stop-band

Abstract

This article proposes the stepped impedance line Wilkinson power divider (SIL WPD) and extracts the design formulae of SIL WPD. In the process of forming the WPD and executing a simulation based on the calculated design parameters, this study found that the SIL WPD improves stop‐band performance compared to the conventional one. In addition, it is useful in reducing the size due to the characteristics of SIL. Finally, the consistency of the simulated and measured results confirmed the validity of the SIL structure. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1607–1610, 2016

Wideband and Compact Wilkinson Power Divider Utilizing Series Delta-Stub and Folded Stepped-Impedance Transmission Line

“…This resulted in a size reduction of 44% compared to the conventional Wilkinson power divider at the same center frequency; however, fractional bandwidth (FBW) is reduced by 8%. Therefore, in order to improve the reduction of bandwidth and get more size reduction, stepped-impedance transmission line is used [7], [8], [24], [28].…”

“…The desired total electrical length, θ t = θ 1 + θ 2 is less than 45° at center frequency of 2.4 GHz [7]. The impedance ratio, Z 2 /Z 1 = K of SITL can reduce the length when K > 1 [7], [24]. The equations from (1) to (6) in Fig.…”