Mushroom type artificial magnetic conductor structure

Abstract

The invention discloses a mushroom type artificial magnetic conductor structure. The magnetic conductor structure comprises two center metal strips intersecting in a cross shape and equal in length, and the intersecting position of the two center metal strips is grounded through a metal via hole; each center metal strip is provided with a plurality of vertical metal strips with one ends perpendicular to the center metal strip making contact with the vertical metal strips, the length of the vertical metal strips is one second that of the center metal strips, and the vertical metal strips on the center metal strips are equal in number and distributed in a central symmetry mode. The mushroom type artificial magnetic conductor structure is compatible with a CMOS technology, plays an electrical isolation role between an on-chip antenna and a silicon substrate, has the characteristic of restraining surface waves within a specific frequency band and then improves the irradiation efficiency of the on-chip antenna. The mushroom type artificial magnetic conductor structure can improve the irradiation efficiency of the on-chip antenna, isolate vortex currents of on-chip spiral passive elements and improve the quality factor of the on-chip spiral passive elements.

Description

technical field [0001] The invention relates to an artificial magnetic conductor, in particular to a mushroom-shaped artificial magnetic conductor structure and a dipole antenna and a single-ended inductance formed therefrom. Background technique [0002] On-chip antennas and on-chip spiral inductors are important passive components that make up radio frequency integrated circuits, and are widely used in low-noise amplifiers, power amplifiers, mixers and other circuit modules. [0003] Integrated circuits realized by CMOS technology can greatly reduce the cost. However, the CMOS process uses silicon material as the substrate, which has a high dielectric constant and electrical conductivity. The high dielectric constant makes most of the electromagnetic energy radiated by the on-chip antenna exist in the silicon substrate in the form of surface waves, while the silicon substrate The high conductivity makes most of the electromagnetic energy existing in the surface wave dissi...

AI Technical Summary

Problems solved by technology

However, the CMOS process uses silicon material as the substrate, which has a high dielectric constant and electrical conductivity. The high dielectric constant makes most of the electromagnetic energy radiated by the on-chip antenna exist in the silicon substrate in the form of surface waves, while the silicon substrate The high conductivity makes most of the electromagnetic energy existing in the surface wave dissipated in the form of heat, resulting in low radiation efficiency of the CMOS process on-chip antenna

[0004] On-chip spiral inductors will induce eddy currents at high frequencies because the current path is helical. Due to the high conductivity of the silicon substrate, the eddy currents are conducted through the silicon substrate, resulting in a decrease in the quality factor of the on-chip spiral inductors.

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