Design of dual-band Wilkinson power divider defected using ground structure

作者：Yang Jin Ping^*; Wu Wen

来源：Acta Electronica Sinica, 2009, 37(2): 338-341.

• Design process
• DGS
• Dual-band
• Ground structures
• Impedance transformer
• Impedance-matching
• Measured results
• Output ports
• Pass bands
• Phase conditions
• Power divider
• Power splits
• Return loss
• Spiral-defected grounds
• Wide frequency ranges
• Wilkinson power dividers

A novel compact dual-band Wilkinson power divider (PD) is researched, which consists of tri-sections impedance transformer integrated with a spiral defected ground structure (SP-DGS). To satisfy the impedance and phase conditions by using SP-DGS, the characteristics of PD such as an equal power split, impedance matching at all ports, and a good isolation between the two output ports are fulfilled at two arbitrary given frequencies simultaneously. The main advantage of this design is that the required reactance is accurately realized by SP-DGS. The design process and formulas are also given, which are strict but flexible. Finally, a 2.4 GHz/5.8 GHz dual-band PD is developed. Measured results show that the maximal passband insert-loss is 0.1 dB and 0.4 dB, and the return loss and isolation are both more than 15 dB in a wide frequency range.

• 出版日期2009
• 单位南京理工大学