A method for suppressing parallel resonance of power distribution network

Due to the influence of parasitic inductance in the layout of the power distribution network (PDN), the changing driving current will cause transient changes in the power supply voltage. This voltage change will interfere with other devices on the one hand, and generate interference current on the other hand, causing electromagnetic interference. For this reason, it is necessary to minimize the PDN impedance [1].
When the PDN is parallel resonant, high impedance will be generated at the resonant frequency. In order to suppress this high impedance, reference [2] introduces an electromagnetic bandgap structure (EBG) to suppress resonance, but the EBG structure will affect the signal integrity of the circuit; reference [3] introduces an inductor element in the capacitor branch to suppress the resonance by controlling the resonance point. This method simply shifts the parallel resonance from one frequency point to another.
This paper proposes a method for suppressing the parallel resonance of the power distribution network. This method increases the branch loss by introducing a series resistor in the decoupling capacitor branch, thereby achieving the purpose of suppressing parallel resonance.

This paper proposes a method to suppress PDN parallel resonance by introducing a series resistor in the decoupling branch, and applies it to the actual board with the help of Hyperlynx PI software. The simulation results show that the resistor introduced in the decoupling branch can effectively reduce the parallel resonance caused by the capacitor at high frequency.
References
[1] ZEEFF TM, HUBING TH. Reducing power bus impedance at resonance with lossy components [J]. Advanced Packaging, IEEE Transactions on, 2002, 25(2): 307-10.
[2] Xie Huanhuan, Jiao Yongchang, Yang Bin, et al. Microstrip patch antenna with harmonic suppression based on mushroom resonator [J]. Journal of Microwaves, 2011, 27(5): 40-3.
[3] Chen Shiqing, Zhao Xinshang, Li Fuxiang. Preventing harmonic amplification during operation of parallel capacitors [J]. High Voltage Technology, 2004, 30(12): 19-22.
[4] Pei Jun. Discussion on equivalent circuit of charging and discharging process of two parallel capacitors [J]. Journal of Panzhihua University: Comprehensive Edition, 2004, 21(003): 119-21.