A 10:1 Unequal Gysel Power Divider Using a Capacitive Loaded Transmission Line

Abstract

Abstract-This paper proposes a 10 : 1 unequal Gysel power divider using a capacitive loaded transmission line (CLTL). For obtaining a high dividing ratio of divider, the CLTL is proposed to realize a low characteristic impedance line below 10 Ω. A design method using a CLTL which consists of a small transmission line with shunt open stub at periodic intervals is newly suggested for power divider with the high power division ratio. For the validation of the CLTL power divider, the high dividing ratio of the fabricated Gysel divider is measured at a center frequency of 1 GHz. The measured performances are in good agreements with simulation results.

A Novel Harmonics-Suppression Coupled-Line Gysel Power Divider for Complex Terminated Impedances

“…The key research of Gysel-and Wilkinson-type PDs mainly focuses on unequal or arbitrary power ratios (Kim, 2012;Lin et al, 2012;Wu et al, 2011a;Li & Wang, 2011;Bemani & Nikmehr, 2014;Zhang et al, 2012), dual-band applications (Zhang et al, 2012;Sun et al, 2011aSun et al, , 2011bPark, 2011), wide-band applications (Guan et al, 2012b;Wu & Liu, 2012), multi-way configurations , and harmonics suppression (Guan et al, 2012a). Among these recent references, some novel technologies have been proposed to improve the performances of Gysel PDs.…”

“…Among these recent references, some novel technologies have been proposed to improve the performances of Gysel PDs. For example, by using a capacitive loaded transmission line (CLTL) (Kim, 2012) or by changing the impedance ratio of the transmission line (Lin et al, 2012;Wu et al, 2011a), the unequal or arbitrary power ratio can be realized in Gysel PDs. In Sun et al (2011aSun et al ( , 2011b, an openand a short-circuit terminated stub are developed to realize the dual-band application.…”

Compact and unequal Gysel power divider with dual harmonic rejection and simple structure

“…Two types of power dividers are most popular among the others. The first type is low-power and small-sized Wilkinson power divider (Wilkinson, 1986) and the second is high-power and large-sized Gysel power divider (Gysel, 1975;Kim, 2012;Wu & Liu, 2012). Both of these dividers suffer from the presence of odd harmonic responses inasmuch as they adopt λ/4 lines.…”

“…Although the study by Guan et al (2012) features high-power handling capability, it has equal power division characteristic. Another design for Gysel power divider with harmonic rejection was presented in Kim (2012). Despite having unequal power division characteristics, it has the following shortcomings: (1) the circuit size is enormous because of using long stubs; (2) the suppression of unwanted signals happens at only 1.5f 0 ; and (3) its proposed transformer is only feasible for higher power division ratios and the structure of unequal Gysel power divider in low power division ratios tends to become the conventional unequal Gysel power divider without any harmonic rejection.…”

A Novel Power Divider Integrated With Siw and DGS Technology

“…The Wilkinson power divider has been widely used with advantages that its output ports can be simultaneously isolated and matched, as well as its bandwidth is extremely wide [1]. Although a large number of designs focusing on minimizing size [2][3][4][5][6][7][8] or obtaining unequal power division ratio [9][10][11][12][13][14] have been reported, some of them have poor power handling capability and tend to have high radiation loss, which make them to be poor choices for microwave and millimeter-wave circuit applications.…”