DGS lumped parameter low-pass filter based on multilayer LCP technology and design method

Abstract

A DGS lumped parameter low-pass filter based on a multilayer LCP technology is characterized in that a signal input port P1 and a signal output port P4 are symmetrically installed, and a first spiral inductor L1 and a second spiral inductor L2 are installed between the signal input port P1 and the signal output port P4; the first grounding port P2 and the second grounding port P3 are installed on the two sides of the signal input port P1, and the signal output port P4 and the third grounding port P5 are installed on the two sides of the signal output port P4. The filter has the beneficial effects that the filter is simple in structure and adopts a symmetric design, the design efficiency can be greatly improved, and a microwave passive device manufactured by utilizing a multilayer LCP process is small in size, high in stability and low in dielectric loss; inductors, capacitors and other passive devices can be embedded in the multi-layer structure substrate, traditional planar integration of microwave devices is converted into three-dimensional integration, the devices are smaller in size and higher in integration level, and the defected ground structure in the lumped parameter filter can effectively reduce the influence caused by parasitic parameters of the inductors and the capacitors.

Description

【Technical field】 [0001] The invention relates to the field of microwave technology, in particular to a DGS lumped parameter low-pass filter and a design method based on a multi-layer LCP process. 【Background technique】 [0002] With the rapid development of modern wireless communication technology, the communication system puts forward higher requirements for the basic components in the circuit. The filter is one of the key components of the RF front-end, and its performance directly affects the quality of the entire wireless communication system. , its structural size will also affect the size of the whole machine. The traditional filter design methods mainly include the distributed parameter method and the lumped parameter method. The distributed parameter method is mainly based on the microwave transmission line theory, substituting insertion loss and insertion phase shift function to obtain the physical structure of the filter. The lumped parameter method is to use the...

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Problems solved by technology

[0005] (1) Using planar spiral inductors and vertical in-line capacitors for filter design, the size of the inductance element is large and the quality factor is low, and the filter performance is not good;

[0006] (2) Using vertical spiral inductors and vertical in-line capacitors for filter design can better reduce the size of the filter, but due to the influence of the parasitic parameters of the inductor and capacitor components, the insertion loss of the filter is relatively large

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