Multiband Antenna Booster Layout With Single-Switch Matching
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Solution Overview
Problem
The challenge lies in the charging problem that arises when mounting a multi-region radiofrequency system with multiple matching networks connected to the same antenna element, particularly when components connected to ground are involved, leading to inefficiencies and losses in the radiofrequency system.
Innovation Solution
The proposed solution involves a smart radiating system with a multiband and/or multi-region radiofrequency system that includes a single switch and pre-matching stages strategically placed between the booster element and the switch, or between the switch and the common matching stage, to optimize impedance matching and reduce charging issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple matching networks are connected to the same antenna element in a multi-region radiofrequency system, then the system can operate at different frequency bands and regions, but charging problems arise between circuit components particularly when components connected to ground are included
Solution Approach 1:
The radiofrequency system is segmented into multiple matching networks (first matching network and second matching network) that are selectively connected to the antenna element through a switch. Each matching network is designed for specific frequency bands or regions, allowing the system to operate across multiple bands while preventing charging problems by isolating ground-connected components when not in use.
Solution Approach 2:
The system employs a dynamic switching mechanism that selectively connects different matching networks to the antenna element based on the desired frequency band or region of operation. This dynamic reconfiguration allows the system to adapt to different operating conditions while preventing charging issues by ensuring only one matching network is active at a time.
2Adaptability or versatility
If a multi-region radiofrequency system is mounted on a real PCB with feeding line extensions, then the system can provide operation at different frequency regions, but charging problems arise between the feeding line extensions
Solution Approach 1:
The harmful charging effect is extracted and eliminated by using a switch to disconnect feeding line extensions that are not currently needed for the desired frequency region. This ensures that only the necessary feeding line extension remains connected, preventing charging problems between multiple extensions while maintaining multi-region operation capability.
Solution Approach 2:
A switch is introduced as an intermediary component between the feeding line extensions and the antenna element. This intermediary selectively connects only the required feeding line extension for the current operating frequency region, preventing charging problems between multiple extensions while enabling operation at different frequency regions.
3Adaptability or versatility
If switches and active circuit components are used in the radiofrequency system, then the system can provide band allocation optimization, but losses increase and the layout becomes more complex
Solution Approach 1:
Multiple matching networks are merged into a single integrated radiofrequency system that shares common components such as the antenna element and switch. This merging reduces the total number of active components required, thereby reducing radiofrequency losses while maintaining the ability to optimize band allocation through selective network switching.
4Adaptability or versatility
If switches and active circuit components are used in the radiofrequency system, then the system can provide band allocation optimization, but the layout for integrating the system becomes more complex
Solution Approach 1:
The switch serves multiple functions: it selects between different matching networks for band allocation optimization, connects or disconnects feeding line extensions to prevent charging problems, and manages the overall radiofrequency signal path. This multi-functionality reduces the need for separate components and simplifies the integration layout while maintaining band allocation optimization capability.
Data Source
AI summary
A wireless device operates in a plurality of frequency bands and/or frequency regions and comprises a radiating system having an RF transceiver, a booster element, a radiation booster, or a modular multi-stage element; a ground plane layer on a PCB, an external port connected to the RF transceiver, and a multiband and/or multi-region radiofrequency system that comprises a switch. The radiating system also comprises a feeding architecture that connects the antenna element or the booster element to the radiofrequency system, the feeding architecture comprising a feeding line connected to a booster or antenna element and at least two feeding line extensions that are connected to a switch of the radiofrequency system and to the feeding line. A multi-region radiofrequency system comprises a switch and at least two matching networks selectable through the switch, the at least two matching networks including two stages: a pre-matching stage and a common matching stage.