Input impedance matching network and RF front-end module

A matching network and input impedance technology, applied in the field of radio frequency communication, can solve problems such as impedance matching

Active Publication Date: 2022-06-21
RADROCK (SHENZHEN) TECH CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides an input impedance matching network and a radio frequency front-end module to solve the problem of impedance matching caused by the parasitic capacitance introduced by the pad in the actual circuit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Input impedance matching network and RF front-end module
  • Input impedance matching network and RF front-end module
  • Input impedance matching network and RF front-end module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be understood that the present invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an input impedance matching network and a radio frequency front-end module. The input impedance matching network includes a first pad, a second pad, and a first inductor connected to the first pad at one end and connected to the second pad at the other end, and the output of the second pad is used as the output of the input impedance matching network end, configured to be connected to the input end of the low noise amplifier; the input impedance matching network also includes a compensation adjustment circuit connected to the first pad and / or the second pad, and the compensation adjustment circuit is configured to connect the first pad to the The parasitic capacitance from the ground and / or the parasitic capacitance from the second pad to the ground are adjusted so that the parasitic capacitance from the first pad to the ground is greater than the parasitic capacitance from the second pad to the ground. The compensation adjustment circuit can make the parasitic capacitance from the first pad to the ground larger than the parasitic capacitance from the second pad to the ground, so as to alleviate the impedance mismatch problem caused by equal parasitic capacitance and realize impedance matching at the input end of the low noise amplifier.

Description

technical field [0001] The invention relates to the technical field of radio frequency communication, in particular to an input impedance matching network and a radio frequency front-end module. Background technique [0002] As the first stage of the receiver, the performance of the LNA plays a crucial role in the performance of the whole receiver system, because the signal-to-noise ratio (SNR) of the whole receiver system is largely determined by the performance of the LNA. Noise figure (NF) and gain, therefore, designing a low-noise amplifier with good performance has become an important goal of RF front-end design. According to the noise cascade formula, the input impedance matching network of the LNA has a great influence on the noise figure of the LNA, and also affects the gain of the LNA. Generally, the input matching of the LNA is realized by a series inductance. However, due to the existence of the SMD pad, some inevitable parasitic capacitances are often generated,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): H04B1/18H04L25/02
CPCH04B1/18H04L25/0278H04L25/0272
Inventor丁团结倪建兴
OwnerRADROCK (SHENZHEN) TECH CO LTD