Dual-Aerial Wireless System Duplexer Elimination
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Solution Overview
Problem
Conventional 3G/4G FDD terminals face high insertion loss due to duplexer requirements, leading to increased power consumption, heat dissipation, and cost, primarily because of the need for significant isolation between transmitting and receiving frequency bands.
Innovation Solution
A wireless communication system that replaces the duplexer with a dual-aerial structure, utilizing a receiving surface acoustic wave filter, single-pole five-throw switch, transmitting surface acoustic filter, power amplifier, low-pass filter, and broadband coupler to separate channels, reducing insertion loss and allowing for integration of modules without a duplexer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a duplexer is used to separate transmitting and receiving channels, then channel isolation is improved, but insertion loss increases
Solution Approach 1:
The patent extracts and removes the duplexer component from the system, replacing it with a dual-aerial architecture where transmitting and receiving channels are physically separated through dedicated aerials and processing circuits, thereby eliminating the insertion loss associated with duplexer filtering while maintaining channel isolation
Solution Approach 2:
The patent segments the radio frequency system into separate transmitting and receiving paths with dedicated aerials (transmitting aerial and receiving aerial), processing circuits, and filters, allowing each path to operate independently without the need for a duplexer to provide isolation
2Reliability
If output power of amplifier is enhanced to compensate for large insertion loss, then power consumption increases
Solution Approach 1:
By removing the duplexer that causes large insertion loss, the system no longer needs to enhance amplifier output power to compensate for signal attenuation, thereby reducing power consumption of the power amplifier while maintaining sufficient output power levels
3Reliability
If output power of amplifier is enhanced to compensate for large insertion loss, then heat dissipation increases
Solution Approach 1:
The patent removes the duplexer component that causes large insertion loss, eliminating the need to operate the power amplifier at high output power levels to compensate for signal attenuation, thereby reducing heat generation and improving thermal performance
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 solution lowers insertion loss, reduces power consumption and heat dissipation, and integrates modules, achieving approximately 10 dB isolation between channels while meeting noise requirements, thus enhancing the overall performance and reducing costs.
Implementation Method 1
a receiving surface acoustic wave filter and a single-pole five-throw switch, a transmitting surface acoustic filter
Data Source
AI summary
A wireless communication transmitting and receiving system may comprise a wireless transmitting and receiving unit, a receiving processing circuit, a transmitting processing circuit, and a receiving aerial and a transmitting aerial. Both the receiving processing circuit and the transmitting processing circuit may be connected to the wireless transmitting and receiving unit, and the receiving aerial and the transmitting aerial may be connected to the receiving processing circuit and the transmitting processing circuit. The present invention may use a dual-aerial structure in which a transmitting channel is separated from a receiving channel and the two channels use respective aerials for communication; the separate aerials may provide an isolation of approximately 10 dB, thus lowering the in-band noise receiving requirement for the transmitting channel.