RF Transceiver Circuit Filter Merging for 5G Interference
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Solution Overview
Problem
The challenge is to minimize interference between 5G radio-frequency signals and other signals, such as 4G and WiFi signals, in mobile communication devices, which existing technologies have not effectively addressed.
Innovation Solution
A radio-frequency signal transmitting and receiving circuit is designed with power amplifiers, band pass filters, low-noise amplifiers, and high/low pass filters or notch filters to specifically attenuate signals in overlapping frequency bands, ensuring that 5G signals are transmitted and received while minimizing interference from 4G and WiFi frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If band pass filters and low-pass filters are used to attenuate interfering signals, then signal interference is reduced, but device complexity increases
Solution Approach 1:
The patent combines multiple filtering functions into a single integrated filter circuit. The low-pass filter and band pass filters are merged into one unified structure that simultaneously performs multiple filtering operations, reducing the total number of components while maintaining effective interference attenuation across different frequency bands.
Solution Approach 2:
The filter circuit is designed with multi-functionality to handle various interfering signals. By configuring the filter with multiple poles and zeros, a single filter structure can attenuate different types of interference (harmonics, adjacent channel signals, images) across multiple frequency bands, making the filter universally effective against various harmful signals.
2Reliability
If multiple filters are added to attenuate harmonics and interfering signals, then receiving sensitivity is improved, but the number of components increases
Solution Approach 1:
Multiple filtering stages are merged into a single integrated filter circuit. Instead of using separate filters for different frequency bands, the patent combines them into one multi-functional filter that achieves the same level of receiving sensitivity improvement while using fewer physical components.
Solution Approach 2:
The filter characteristics are optimized by adjusting parameters such as the number of poles and zeros, cutoff frequencies, and quality factors. By carefully selecting these parameters, the single filter circuit achieves high receiving sensitivity without requiring multiple additional components, as the parameter optimization allows one filter to perform the work of several.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces signal interference, enhancing the sensitivity of the receiving circuit by attenuating unwanted harmonics and frequencies, thereby improving the overall performance of the mobile communication device.
Implementation Method 1
a first transmitting and receiving filter being configured to transmit the radio-frequency input signal and the first radio-frequency reception signal and attenuate a radio-frequency signal having a frequency equal to at least one of frequencies
Data Source
AI summary
A radio-frequency signal transmitting and receiving circuit includes a power amplifier, a transmission band pass filter configured to transmit a radio-frequency input signal, a first reception band pass filter configured to transmit a first radio-frequency reception signal, a first low-noise amplifier configured to amplify the first radio-frequency reception signal and output a first radio-frequency output signal, a first transmitting and receiving filter having a first end and a second end, the first end being electrically connected to a first antenna terminal, and a switch configured to electrically connect the transmission band pass filter to the second end of the first transmitting and receiving filter to output the radio-frequency input signal to the first antenna terminal and electrically connect the second end of the first transmitting and receiving filter to the first reception band pass filter to receive the first radio-frequency reception signal from the first antenna terminal.