Configurable Multiband GNSS Antenna With Single RF Path
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Solution Overview
Problem
Existing GNSS antenna systems require multiple sets of LNAs and matching circuits for different frequency bands, leading to increased complexity and component redundancy.
Innovation Solution
An antenna system with a configurable RF communication path and control unit that adjusts elements based on a control signal to operate in a selected frequency band, using a single transmission line for both control and GNSS signals, reducing the number of components needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sets of LNAs and matching circuits are used for different frequency bands, then the antenna system can operate across multiple frequency bands, but the device complexity and component redundancy increase
Solution Approach 1:
The patent implements a single LNA and matching circuit that can serve multiple frequency bands (L1, L2, L5) through configurable elements. The matching circuit includes adjustable components that can be reconfigured to match different frequency requirements, allowing one circuit to perform the function that traditionally required multiple dedicated circuits for each frequency band.
Solution Approach 2:
The patent employs configurable elements in the matching circuit that can dynamically adjust their characteristics based on the operating frequency band. These elements include variable inductors, capacitors, or switches that reconfigure the matching network to optimize performance for different frequency ranges, enabling the same hardware to adapt to changing operational requirements.
2Reliability
If multiple RF signal paths are used for different frequency bands, then the antenna system maintains high noise performance, but the number of components and system complexity increases
Solution Approach 1:
The patent designs a single RF signal path that can handle multiple frequency bands through the use of configurable matching circuits. This unified path eliminates the need for separate dedicated paths for each frequency band while maintaining noise performance through optimized single-path architecture and careful impedance matching across all bands.
Solution Approach 2:
The patent merges multiple traditional separate RF paths into a single integrated path. By combining the signal routing functions and using shared components (single LNA, configurable matching circuit), the system achieves the same noise performance as multiple separate paths would provide, while significantly reducing component count and complexity.
Data Source
AI summary
An antenna system may include an antenna operable in a selected frequency band of a plurality of frequency bands. In some examples, the antenna system may include an antenna circuit having an RF (radio frequency) communication path and one or more configurable elements in the RF communication path. The antenna system may include a transmission line coupled to the antenna circuit. The antenna system may include a control unit configured to modulate a control signal onto an RF signal to generate a transmit signal for communication over the transmission line to the antenna circuit. The antenna circuit may be configured to demodulate the control signal from the transmit signal. The antenna circuit may be operable to adjust the one or more configurable elements in the RF communication path based at least in part on the control signal to configure the RF communication path to operate in the selected frequency band.