GPS Antenna Assembly with Switchable L5 Antennas for Handheld Accuracy
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Solution Overview
Problem
Conventional antenna assemblies using a dual-band GPS antenna for L1 and L5 frequency bands compromise the performance of both bands, leading to reduced positioning accuracy, especially when the device is held by a user.
Innovation Solution
An antenna assembly with a first GPS L1 antenna and two GPS L5 antennas, along with a switchable GPS module that selects the best antenna based on network information, ensuring optimal signal reception and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one antenna is shared by both L1 frequency band and L5 frequency band, then device complexity is reduced, but positioning accuracy deteriorates
Solution Approach 1:
The patent segments the antenna system into three independent antennas: one dedicated L1 antenna and two dedicated L5 antennas. This segmentation allows each antenna to be optimized for its specific frequency band, eliminating the performance compromise that occurs when a single antenna must serve both L1 and L5 bands simultaneously.
Solution Approach 2:
The patent implements multi-functionality by providing two L5 antennas that can serve different purposes: one for normal operation and another as a backup when the device is held by the user. This universal approach ensures that positioning accuracy is maintained across different usage scenarios without requiring a complex mechanical switching mechanism.
2Quantity of substance
If a dual-band GPS antenna is used for L1 and L5 frequency bands, then the number of antennas is reduced, but signal reception quality deteriorates when device is held
Solution Approach 1:
The patent introduces dynamic switching capability between two L5 antennas based on the device's usage state. When the device is held by the user, the system dynamically switches from the first L5 antenna to the second L5 antenna, ensuring continuous reliable signal reception despite changes in device orientation and position.
Solution Approach 2:
The patent changes the operational parameters by providing separate dedicated antennas for L1 and L5 frequency bands, with the L5 band having two antennas with different spatial orientations. This parameter change ensures that at least one L5 antenna maintains optimal reception regardless of how the device is held.
3Measurement precision
If separate antennas are provided for L1 and L5 frequency bands, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the antenna system into three independent antennas: one dedicated L1 antenna and two dedicated L5 antennas. This segmentation allows each antenna to be optimized for its specific frequency band, eliminating the performance compromise that occurs when a single antenna must serve both L1 and L5 bands simultaneously.
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
Improves GPS positioning accuracy by maintaining efficient signal reception across both L1 and L5 frequency bands, even when the device is held, by dynamically switching to unobstructed antennas.
Implementation Method 1
a first antenna, configured to radiate a first signal at a GPS L1 frequency band
Implementation Method 2
each of the second antenna and the third antenna is configured to radiate a second signal at a GPS L5 frequency band
Data Source
AI summary
Provided are an antenna assembly and an electronic device. The antenna assembly includes a housing, a radio frequency circuit, a first antenna, a second antenna, and a third antenna. The first, second and third antennas are provided on the housing. The first antenna radiates a first radio frequency signal at a GPS frequency band L1, and each of the second and third antennas radiates a second radio frequency signal at a GPS frequency band L5. A first GPS module of the radio frequency circuit is connected with the first antenna and supports receipt and transmission of the first radio frequency signal. A second GPS module of the radio frequency circuit is selectively connected to one of the second and third antennas, and switch, based on network information of a received second radio frequency signal, between being connected to the second antenna and being connected to the third antenna.