Tunable RF Front End with Separate TX/RX Matching Networks
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Solution Overview
Problem
The increasing complexity of mobile phone RF architecture due to multiple frequency bands and modes leads to component redundancy, size, and weight issues, along with the need for improved signal isolation and efficiency, which existing technologies fail to optimize effectively.
Innovation Solution
A tunable radio front end with separate impedance matching networks for transmission and reception, incorporating tunable antennas and filters, allowing for compact, agile design with reduced components, optimized signal paths, and precise frequency tuning, thereby eliminating redundant hardware and enhancing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sets of fixed circuitry are used to support multiple frequency bands and modes, then the device can operate across diverse functions and bands, but the quantity of components (switches, filters, power amplifiers, duplexers) increases, leading to increased device complexity and size
Solution Approach 1:
The patent implements a universal RF front-end architecture where a single set of circuitry components (switches, filters, power amplifiers, duplexers) is designed to handle multiple frequency bands and operational modes. This is achieved through careful circuit design that allows the same components to be reconfigured for different bands, eliminating the need for separate dedicated circuitry for each band and mode, thus reducing overall component quantity while maintaining multi-band versatility
Solution Approach 2:
The patent employs dynamic reconfiguration capabilities through electronically controllable switches and tunable components that can change their operational characteristics based on the required frequency band and mode. This dynamic adaptability allows the fixed circuitry to be flexibly allocated to different functions as needed, replacing the static multi-set architecture with a single dynamic set that can be programmed for various operational requirements
2Volume of moving object
If the physical space for the antenna is constrained, then the device size is reduced, but the antenna bandwidth is limited, restricting the range of frequencies over which the antenna can operate with acceptable efficiency
Solution Approach 1:
The patent utilizes electronically tunable antenna elements whose electrical characteristics (resonant frequency, impedance, radiation pattern) can be dynamically adjusted through variable capacitors, inductors, or varactor diodes. This allows a compact physical antenna structure to achieve multiple frequency bands and wide bandwidth operation by changing its electrical parameters rather than requiring multiple physical antenna structures, thus resolving the contradiction between small size and wide bandwidth
Solution Approach 2:
The antenna system incorporates dynamic tuning mechanisms that allow real-time adjustment of operational parameters to adapt to different frequency requirements. This dynamic capability enables a single compact antenna to cover wide frequency ranges by electronically reconfiguring its resonant characteristics, eliminating the need for larger physical dimensions while maintaining multi-band operation capability
3Adaptability or versatility
If more components are added to support multiple bands and modes, then the functional capability is improved, but the device weight increases
Solution Approach 1:
The patent designs universal RF components that can serve multiple frequency bands and operational modes simultaneously or sequentially, rather than using separate dedicated components for each band. This multi-functionality approach reduces the total component count and consequently the overall device weight, while maintaining the capability to support diverse bands and modes through intelligent circuit design and electronic reconfiguration
Data Source
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AI summary
Tunable radio front end systems and methods are disclosed in which the tunable radio front end includes a first tunable impedance matching network, a second tunable impedance matching network, a transmission signal path, and a reception signal path. The transmission signal path can include a first tunable filter in communication with the first tunable impedance matching network, a tunable power amplifier connected to the first tunable filter, and a radio transmitter connected to the tunable power amplifier. The reception signal path can include a second tunable filter in communication with the second tunable impedance matching network, a tunable low-noise amplifier connected to the second tunable filter, and a radio receiver connected to the tunable low-noise amplifier.