1T2R RF Front-End Circuit for Shared Antenna Reception

Solution Overview

Problem

The design of radio frequency front ends in 5G mobile communication devices is complex and costly due to the need for four independent antennas for four-channel simultaneous reception, which complicates integration and increases costs.

Innovation Solution

A 1T2R radio frequency circuit that includes a first and second radio frequency amplifier, low noise amplifiers, and channel switches, allowing for shared functional modules and simplified design by enabling one-channel transmission and two-channel reception through a single integrated circuit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If four independent antennas are used for four-channel simultaneous reception, then reception capability is improved, but device complexity and cost increase

Engineering Contradiction:

Improvereception capabilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple antenna functions into a unified 1T2R radio frequency circuit architecture. Specifically, it merges the transmission and reception pathways so that a single transmit antenna can serve multiple reception channels through shared low noise amplifiers and signal processing paths, reducing the need for four completely independent antenna systems while maintaining four-channel reception capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements multi-functionality by designing the radio frequency circuit where components serve multiple purposes. The transmit antenna is used not only for transmission but also for receiving signals on multiple channels. The low noise amplifiers and channel switches are configured to handle both transmission and reception operations across different channels, allowing a single circuit to perform what would traditionally require four separate antenna systems

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If four independent antennas are used for four-channel simultaneous reception, then reception capability is improved, but manufacturing cost increases

Engineering Contradiction:

Improvereception capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent merges multiple antenna functions into a unified 1T2R radio frequency circuit architecture. Specifically, it merges the transmission and reception pathways so that a single transmit antenna can serve multiple reception channels through shared low noise amplifiers and signal processing paths, reducing the need for four completely independent antenna systems while maintaining four-channel reception capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements multi-functionality by designing the radio frequency circuit where components serve multiple purposes. The transmit antenna is used not only for transmission but also for receiving signals on multiple channels. The low noise amplifiers and channel switches are configured to handle both transmission and reception operations across different channels, allowing a single circuit to perform what would traditionally require four separate antenna systems

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11621679B2Radio frequency circuit, method of transmitting and receiving radio frequency signal, and wireless communication device

Publication Date: 2023.04.04 XINPLETEK SHANGHAI CO LTD

AI summary

Disclosed is a radio frequency circuit, a method of transmitting and receiving radio frequency signals, and a wireless communication device. The radio frequency circuit includes a first radio frequency amplifier, a second radio frequency amplifier, a first channel switch, a first low noise amplifier, a second low noise amplifier, and a second channel switch; the first radio frequency amplifier and the second radio frequency amplifier are connected with a plurality of antennas through the first channel switch, respectively, and are connected with a plurality of SRS antennas through an SRS switch in the first channel switch; the first low noise amplifier and the second low noise amplifier are connected with the plurality of antennas through the first channel switch, respectively, and are connected with a receiver through the second channel switch, respectively; wherein, the first radio frequency amplifier or the second radio frequency amplifier transmits one channel of radio frequency transmission signals to realize one-channel transmission, and the first low noise amplifier and the second low noise amplifier simultaneously receive radio frequency reception signals to realize two-channel reception.