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Radio frequency transmitter having improved receive band rejection function

A radio frequency transmission and reception band technology, applied in impedance networks, electrical components, switched capacitor networks, etc., can solve the problems of inability to effectively suppress noise in the reception band, deteriorating the transmission insertion loss of duplexers, etc.

Active Publication Date: 2018-03-09
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the above-mentioned conventional methods for suppressing power supply noise cannot effectively suppress receive band noise
Additionally, meeting the receive band noise rejection requirements in a duplexer can inadvertently degrade the transmit insertion loss of the duplexer

Method used

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  • Radio frequency transmitter having improved receive band rejection function
  • Radio frequency transmitter having improved receive band rejection function
  • Radio frequency transmitter having improved receive band rejection function

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Embodiment Construction

[0048]The following detailed description is provided to assist the reader in gaining an overall understanding of the methods, devices and / or systems described herein. However, various alterations, modifications and equivalents of the methods, apparatus and / or systems described herein will be apparent after understanding the disclosure of the present application. For example, the order of operations described herein are examples only, and are not limited to the order set forth herein, but, except for operations that must occur in a particular order, can be made that will be apparent after understanding the disclosure of this application. change. Furthermore, descriptions of features that are known in the art may be omitted for increased clarity and conciseness.

[0049] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to i...

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Abstract

The invention provides a radio frequency transmitter having an improved receive band rejection function. The radio frequency transmitter includes a transmit circuit configured to generate a transmit signal; a receive band rejection filter comprising a capacitor and an inductor resonating with each other to reject a receive frequency band from the transmit signal, wherein a ratio value of a capacitance value of the capacitor to an inductance value of the inductor is within a predetermined range; and a power amplifying circuit configured to amplify the transmit signal through the receive band rejection filter.

Description

[0001] This application claims Korean Patent Application No. 10-2016-0109333 filed with the Korean Intellectual Property Office on August 26, 2016 and Korean Patent Application No. 10-2017-0049109 filed with the Korean Intellectual Property Office on April 17, 2017 Benefit of Priority to Patent Application, the disclosure of which is hereby incorporated by reference for all purposes. technical field [0002] The present disclosure relates to a radio frequency transmitter with improved receive band suppression. Background technique [0003] Generally, a communication device for Long Term Evolution (LTE), Wideband Code Division Multiple Access (WCDMA), or Global System for Mobile Communications (GSM), etc. may use a Frequency Division Duplex (FDD) method or a Time Division Duplex (TDD) method to perform Both uplink and downlink functionality. The FDD method is a method of simultaneously performing uplink communication and downlink communication by allocating different frequen...

Claims

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Application Information

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IPC IPC(8): H04B1/525
CPCH04B1/525H04B1/0475H03H2007/013H03H7/40H03H9/25H03H19/004H04B1/0458
Inventor 任兑镐
Owner SAMSUNG ELECTRO MECHANICS CO LTD
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