Resonant Cavity Combiner With Integrated Filtering for Guard-Band-Free RF
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Solution Overview
Problem
Conventional combiners result in significant power loss, increased energy consumption, and wasted spectrum resources due to the need for guard bandwidths, leading to inefficient spectrum utilization and potential device failures from signal leakage.
Innovation Solution
A combiner design utilizing resonant cavities with out-of-band suppression filters and matching resonators, eliminating the need for guard bandwidths and reducing power loss by ensuring complete frequency band matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional resonant cavity combiner is used, then power loss in combination is reduced, but a guard bandwidth must be reserved between combiners to meet isolation requirements, resulting in spectrum loss and reduced spectrum utilization
Solution Approach 1:
The patent combines the resonant cavity combiner and filter into a single integrated device. The resonant cavity structure provides low power loss during combination, while the integrated filter provides out-of-band suppression to eliminate the need for guard bandwidth. This merging of functions allows the device to simultaneously achieve low power loss and full spectrum utilization without requiring separate guard bands between adjacent frequency bands.
Solution Approach 2:
The combiner is designed to perform multiple functions: it combines signals from different frequency bands with minimal power loss while simultaneously providing out-of-band rejection through integrated filtering. This multi-functionality eliminates the need for separate filtering components and guard bandwidth reservations, allowing 100% spectrum utilization while maintaining low power loss.
2Reliability
If guard bandwidth is reserved between combiners to meet isolation requirements, then mutual isolation between ports is ensured, but the reserved spectrum cannot be used and spectrum utilization is reduced
Solution Approach 1:
The patent extracts the filtering function from a separate component and integrates it directly into the resonant cavity combiner structure. This extracted filtering capability provides the necessary out-of-band suppression and port isolation without requiring external guard bandwidth, thereby eliminating the spectrum waste associated with conventional isolation methods.
Solution Approach 2:
The integrated filter acts as an intermediary element within the combiner structure that mediates between the need for signal combination (low power loss) and the need for isolation (port separation). This intermediary filtering function enables full spectrum utilization by suppressing out-of-band signals without requiring guard bands, thus maintaining reliability while maximizing spectrum resources.
3Ease of manufacture
If multiple network devices share an antenna feeder, then manufacturing costs are reduced and antenna area is optimized, but power loss during combination increases and spectrum utilization must be maintained
Solution Approach 1:
The patent merges the signal combining function with the filtering function in a single integrated resonant cavity combiner. This allows multiple network devices to share an antenna feeder with minimal power loss, as the integrated structure efficiently combines signals while suppressing out-of-band interference, thereby maintaining both ease of manufacture and low power 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
Enhances spectrum utilization and reduces power loss, minimizing energy consumption and preventing signal interference, thereby optimizing network device performance and resource efficiency.
Implementation Method 1
a first plurality of resonant cavities 120 are configured between the first input port and the first output port of the first radio frequency channel
Implementation Method 2
an out-of-band suppression filter is integrated into the combiner
Data Source
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AI summary
This application provides a combiner, including: a plurality of radio frequency channels, where an ith radio frequency channel in the plurality of radio frequency channels includes: an input port, configured to input a first signal corresponding to the ith radio frequency channel, where frequencies of signals corresponding to any two radio frequency channels are different; an output port, configured to output the first signal from the ith radio frequency channel; a resonant cavity component configured between the input port and the output port, including a plurality of resonant cavities connected in series; and a matching resonator, connected to any resonant cavity in the resonant cavity component; and a combination port, connected to an output port of each radio frequency channel, where the ith radio frequency channel is any of the plurality of radio frequency channels, and a consumable device is disposed between matching resonators of any two neighboring radio frequency channels.