Bandpass-Response Power Divider With High Isolation

Abstract

Abstract-A novel wideband multilayer power divider with high isolation and bandpass response is presented in this article. This presented power divider employs microstrip-slotline coupling structure to realize the basic function of dividing input power. One lumped isolation resistor is introduced to improve the isolation between output ports. In order to solder the chip resistor between output branches, bending microstrip structure is utilized. For the sake of rejecting the unwanted signals locating in adjacent channels, interdigital structure and defected ground structure are designed to obtain a bandpass response and a wide upper stopband. The experimental results have indicated that the proposed wideband power divider has good performance on return losses, isolation, amplitude and phase balances, as well as group delay over the band 4.5 GHz-10 GHz.

Filtering Power Divider Based on Lumped Elements

“…It is noted that the parameters C 1 , L 3 , C 4 and L 4 can be represented by L 1 and C 3 as indicated by the Equations (11), (16), (19) and (20). The C 2 and L 2 are determined by (14) and (15).…”

“…Step 2: Referring to the equations of (11), (16), (19) and (20), the parameters C 1 , L 3 , L 4 and C 4 can be represented by L 1 , C 3 and the given upper transmission zero f Z2 .…”

“…Thus, it is necessary to integrate the two functions into one device for miniaturization. In the past, some integrated designs were proposed [9][10][11][12][13][14][15][16][17][18][19][20]. In [9], the filtering structure is cascaded with the T-junction, resulting in dual functions of power dividing and filtering.…”

“…For instance, power dividers with dual passband responses [13] and unequal power ratios [17] are reported. In [18][19][20], UWB power dividers are designed with bandpass responses. Lowpass filters can also be integrated with power dividers to improve the stopband characteristics [21].…”