A 60GHz defected ground power divider using SiGe BiCMOS technology

A 60GHz Wilkinson power divider using the meander lines with the floating defect grounding structure (DGS) is introduced and implemented by using the 0.18μm SiGe BiCMOS technology. The slow-wave characteristics of the meander-line and the floating defected ground structure are investigated and used for miniaturized power divider implementation. The dividers using poly resistor and metal resistor are also compared experimentally. The measured results show the frequency covers 40GHz~70GHz with the insertion loss of 2dB and isolation of better than 15dB. The phase balance is better than 2degrees and the amplitude balance is better than 0.1dB. The size of the divider is only 300μm by 300μm, which can be economically integrated with 60GHz radio chipset.