Single-path dual-band GNSS front-end system for asset tracking and telematics devices
AssigneeGeotab Inc.
InventorIrene Ai May Wong
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Abstract
A single-path dual-band GNSS front-end system for asset tracking and telematics devices is provided. The system configures a GNSS antenna, a SAW filter, a low-noise amplifier (LNA), and a SAW diplexer to process both L1 and L5 signals, thereby reducing the number of required components, lowering power consumption, and minimizing PCB space while enhancing signal reliability in urban environments. The GNSS front-end system is part of a GNSS subsystem used in asset trackers and telematics devices. A method for processing dual-band GNSS signals in a single-path front-end system is also claimed, including receiving, filtering, amplifying, and separating L1 and L5 signals.
Claims20
A single-path dual-band GNSS front-end system, comprising:
- a GNSS antenna configured to receive GNSS signals in L1 and L5 frequency bands;
- a surface acoustic wave (SAW) filter configured to filter out unwanted out-of-band signals from the received GNSS signals;
- a low-noise amplifier (LNA) configured to amplify the filtered GNSS signals;
- and
- a SAW diplexer configured to separate the amplified GNSS signals into L1 and L5 frequency bands;
- wherein the system is configured to reduce the number of components compared to dual-path designs, thereby reducing power consumption and printed circuit board (PCB) space.
A method for processing dual-band GNSS signals in a single-path front-end system, comprising:
- receiving GNSS signals in L1 and L5 frequency bands via a GNSS antenna;
- filtering the received GNSS signals to remove unwanted out-of-band signals using a surface acoustic wave (SAW) filter;
- amplifying the filtered GNSS signals with a low-noise amplifier (LNA);
- and
- separating the amplified GNSS signals into L1 and L5 frequency bands using a SAW diplexer;
- wherein the method reduces the number of components compared to dual-path designs, thereby reducing power consumption and printed circuit board (PCB) space.
An electronic device comprising:
- a single-path dual-band GNSS front-end system including
- a GNSS antenna configured to receive GNSS signals in L1 and L5 frequency bands,
- a surface acoustic wave (SAW) filter configured to filter out unwanted out-of-band signals from the received GNSS signals,
- a low-noise amplifier (LNA) configured to amplify the filtered GNSS signals, and
- a SAW diplexer configured to separate the amplified GNSS signals into L1 and L5 frequency bands;
- a GNSS receiver configured to receive the separated L1 and L5 signals and compute a location;
- a controller coupled to the GNSS receiver;
- a memory coupled to the controller;
- and
- a network interface configured to send the computed location to a remote server over a network;
- wherein the electronic device is configured to reduce the number of components compared to dual-path designs, thereby reducing power consumption and printed circuit board (PCB) space.
Dependencies are inferred from the claim text.