Centimeter wave microstrip decoupling circuit

Abstract

The embodiment of the invention provides a centimeter wave microstrip power decoupling circuit. A microstrip is a microstrip line. The microstrip decoupling circuit is used for decoupling an analog integrated circuit power supply port (graphical representation IC end), is composed of a high-impedance network and a low-impedance network, and has a working frequency of 12 GHz to 12.5 GHz. The microstrip line comprises but is not limited to a fan-shaped microstrip line or a T-shaped microstrip line or a cross microstrip line or an open-circuit microstrip stub line and the like. A low-frequency lumped parameter capacitor or inductor is replaced with a microstrip line form, high impedance is 500-5000 times of load impedance through various single or combined microstrip line forms, and the transmission of 12GHz-12.5 GHz alternating current signals on a power supply network is prevented; the low impedance is close to 0 ohm, and an alternating current signal is provided to a ground loop. The high-impedance network and the low-impedance network jointly achieve the purpose of power supply decoupling, the influence that a signal of a certain module is transmitted to other modules through thepower supply network is reduced, and therefore, centimeter wave band noise introduced by a power supply is reduced, and it is guaranteed that a circuit system is not interfered by power supply noise and works normally.

Description

technical field [0001] The present application relates to the field of power integrity design, in particular to a centimeter-wave microstrip decoupling circuit, which decouples a power port of an analog integrated circuit. Background technique [0002] As the operating frequency of electronic components becomes higher and higher, the frequency of the signal coupled to the power supply path is also higher and higher, and the frequency of AC noise on the power supply path is also higher and higher. The coupling frequency is also getting higher and higher. However, ordinary lumped parameter components can only be used for power supply decoupling with a frequency of about 200MHz, while the power supply decoupling frequency of the power ground plane is also about 500MHz, and the design frequency of the internal power supply decoupling of the chip is also about 1GHz. Therefore, due to the existence of parasitic parameters, the existing power supply decoupling methods are powerles...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in this application is to solve the problem that the lumped parameter components have serious distribution parameters at high frequencies and cannot work, and use microstrip lines and fan-shaped microstrip lines to replace lumped parameter capacitors and inductances to achieve the purpose of power supply decoupling

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