On-chip millimeter wave band-pass filter having MPG element and based on coupling line structure

Abstract

The invention relates to an on-chip millimeter wave band-pass filter having an MPG element and based on a coupling line structure. An input end of a filter is connected with one end of a transmissionline, and an output end of the filter is connected with the other end of the transmission line; one end of a first capacitor is connected with the input end, and the other end of the first capacitor is grounded; one end of the second capacitor is connected with the output end, and the other end of the second capacitor is grounded; the upper part and the lower part of a grounding ring surround thetwo sides of the transmission line and the MPG element in a metal layer stacking mode; the MPG element is composed of a first open circuit branch knot and a second open circuit branch knot which are opposite in directions and realize energy transmission through coupling, and the MPG element and the transmission line realize energy transmission through coupling; and the transmission line is composed of a first T-shaped transmission line and a second T-shaped transmission line, and energy transmission is carried out in a coupling mode. According to the invention, a multi-layer structure is adopted, the MPG element is achieved by using metal layers TM1 and M5 below a top metal layer TM2, and a transmission zero point can be generated at a high stop band without occupying any extra chip area.

Description

technical field [0001] The present invention relates to the technical field of filters, in particular to an on-chip millimeter-wave bandpass filter with MPG elements based on a coupled line structure Background technique [0002] The development of silicon-based mmWave integrated circuits has successfully demonstrated the promise of system-on-chip, enabling several emerging RF applications. A key difference between traditional sub-6 GHz and emerging mmWave transceiver designs is that frequency doubling techniques are often employed to generate the required LO signal so that the mmWave signal source can be generated in an energy-efficient manner to support up / down Frequency conversion in mmWave region. To generate the LO sources required for operation in the mmWave range, a frequency doubler is the most basic building block, and other higher order frequency doublers can be realized by cascading multiple frequency doublers together. Since the fundamental operating characteri...

AI Technical Summary

Problems solved by technology

[0003] The existing filter technology used in the RF front-end has the following defects: (1) The design technology based on pattern grounding or defect grounding structure (DGS) has attracted widespread attention due to its inherent compactness

(2) Active filters in which active components (such as transistors) are added to compensate for the losses of integrated passive components, however, due to nonlinear issues, these filters are limited to very low power applications and are comparable to fully passive filters. than, they exhibit a higher noise figure and potential instability due to their higher temperature sensitivity, and there may be some passband ripple active phase dependence in their transfer function due to the natural frequency

Images