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An IPD filter and an enhanced filtering architecture thereof

A filter and notch circuit technology, applied in the field of IPD filter and its enhanced filter architecture, can solve the problems of increasing filter loss, area and cost, and achieve reduced design difficulty, good harmonic suppression capability, and good high-order The effect of harmonic suppression

Pending Publication Date: 2018-12-28
LANSUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To achieve good harmonic suppression, additional trap circuits are required for suppression, which increases filter loss, area, and cost

Method used

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  • An IPD filter and an enhanced filtering architecture thereof
  • An IPD filter and an enhanced filtering architecture thereof
  • An IPD filter and an enhanced filtering architecture thereof

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Abstract

The invention provides an IPD filter and an enhanced filtering structure thereof. The structure comprises an input inductor, a first notch circuit, a band stop circuit, a second notch circuit and an output inductor. One end of the first notch circuit is connected with the other end of the input inductor and one end of the band stop circuit, and the other end is connected with the power ground; theother end of the band stop circuit is connected with one end of the second notch circuit and one end of the output inductor. The other end of the second notch circuit is connected to the power ground; the other end of the output inductor is connected with the filter output end; one end of the first capacitor is connected to the first notch circuit, and the other end of the first capacitor is connected to the second notch circuit. The invention reduces the design difficulty of the IPD filter, provides better harmonic suppression ability, and can realize better high-order harmonic suppression on the premise of ensuring the loss and area of the filter.

Description

technical field The invention relates to the technical field of radio frequency power amplifier filtering, in particular to an IPD filter and its enhanced filtering architecture. Background technique NB-IoT (Narrow Band Internet of Things, Narrowband Internet of Things) is an important branch of the Internet of Everything. NB-IoT is built on a cellular network and consumes only about 180KHz of bandwidth, and can be directly deployed on a GSM network (Global System for Mobile Communications, Global System for Mobile Communications), a UMTS network (Universal Mobile Telecommunications System, Universal Mobile Communications System) or an LTE network (Long Term Evolution, long-term evolution) to reduce deployment costs and achieve smooth upgrades. NB-IoT is an emerging technology in the IoT field, which supports cellular data connections of low-power devices in wide area networks, also known as low-power wide area networks (LPWAN). NB-IoT supports efficient connection of dev...

Claims

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Application Information

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IPC IPC(8): H03H7/01
CPCH03H7/01H03H7/0115H03H2007/013
Inventor 祁威龙华
Owner LANSUS TECH INC
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