Tunable Resonator Radio Unit for Unsynchronized TDD Isolation
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Solution Overview
Problem
Current technologies lack an effective solution for unsynchronized Time Division Duplex (TDD) multi-band operation in wireless communication systems, particularly for 5G NR, where simultaneous transmitter and receiver operations require high isolation between frequency bands to prevent spurious emissions and signal leakage.
Innovation Solution
A radio unit comprising multiple tunable resonators that can be tuned to different operating modes, eliminating the need for TDD switches and achieving high isolation between transmitting and receiving signals across multiple frequency bands using a common radio hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TDD switches are used to achieve isolation between transmitting and receiving signals, then isolation performance is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the switching function from the system by using tunable resonators that naturally provide isolation through their frequency-selective properties. The resonators are tuned to resonate at specific frequencies, allowing them to pass desired signals while blocking spurious emissions and leakage, thereby eliminating the need for separate TDD switches.
Solution Approach 2:
The tunable resonator arrangement serves multiple functions simultaneously: it acts as a filter for frequency selection, provides isolation between transmitting and receiving paths, and enables dynamic tuning for different operating modes. This multi-functionality consolidates what would traditionally require separate components into a single integrated structure.
2Reliability
If TDD switches are used to achieve isolation between frequency bands, then isolation performance is improved, but power consumption increases
Solution Approach 1:
The patent removes the power-hungry switching mechanism and replaces it with passive resonant structures. The tunable resonators achieve isolation through their inherent frequency-selective resonance properties, which require minimal active power consumption compared to electronic switches that must be actively controlled and switched.
Solution Approach 2:
The patent employs passive resonant elements that do not require continuous power supply to maintain their filtering and isolation functions. Once tuned, these resonators provide sustained isolation performance without consuming additional power, unlike active switching components that require continuous control signals and power.
3Measurement precision
If multiple fixed resonators are used for different frequency bands, then frequency selectivity is improved, but device complexity and size increase
Solution Approach 1:
The patent employs tunable resonators whose resonant frequencies can be dynamically adjusted according to different operating modes. This dynamic tuning capability allows a single set of resonators to replace multiple fixed resonators, as they can be reconfigured to resonate at different frequencies as needed, thereby reducing the number of components required.
Solution Approach 2:
The patent changes the operational parameters of the resonators by tuning their resonant frequencies dynamically. This parameter adjustment allows the same physical resonator structure to serve multiple frequency bands, eliminating the need for separate fixed resonators for each band and reducing overall device complexity.
4Adaptability or versatility
If traditional multi-band operation is implemented with separate hardware for each band, then frequency band coverage is improved, but insertion loss increases due to combiners
Solution Approach 1:
The patent segments the signal paths for different frequency bands using separate resonator arrangements, each tuned to specific bands. This segmentation allows direct connection of resonators to the antenna element without requiring combiners, as each resonator arrangement independently handles its designated frequency band, thereby eliminating combiner-induced insertion loss.
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
The solution enables high-performance, flexible, and power-efficient unsynchronized TDD multi-band operation, reducing insertion loss, power consumption, and product size, while maintaining high sensitivity and reducing dependence on complex switches.
Implementation Method 1
a first resonator arrangement comprising one or more resonators tuned for operating at a first frequency band... a second resonator arrangement comprising one or more resonators tuned for operating at a second frequency band... at least four tunable resonators which are tuned according to different operating modes
Data Source
AI summary
A radio unit for unsynchronized Time Division Duplex (TDD) multi-band operation in a wireless communication system. The radio unit comprises a first resonator arrangement comprising one or more resonators tuned for operating at a first frequency band. A first terminal of the first resonator arrangement is coupled to an antenna element. The radio unit further comprises a second resonator arrangement comprising one or more resonators tuned for operating at a second frequency band. A first terminal of the second resonator arrangement is coupled to the antenna element. The radio unit further comprises a tunable resonator arrangement comprising at least four tunable resonators. The at least four tunable resonators in the tunable resonator arrangement are tuned according to different operating modes.