Ring Radiator Antenna Layout for Dual-Band Smart Watch GNSS
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Solution Overview
Problem
The existing antenna structures in wearable electronic devices face difficulties in manufacturing due to the need for an optimal layout of the feeding point between the L1 and L5 frequency bands, which conflicts with the button module location, making it challenging to ensure effective clearance space and right-hand gain for satellite signals.
Innovation Solution
The proposed antenna structure includes a ring radiator with a feeding point, a first grounding point, and a second grounding point, where the first antenna receives signals in the L1 frequency band and the second antenna receives signals in the L5 frequency band, allowing the feeding point to be positioned elsewhere without compromising the right-hand gain, thus ensuring effective clearance space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the feeding point is positioned at the 2-4 o'clock position to ensure right-hand gain for L1 and L5 frequency bands, then the antenna performance is improved, but the manufacturing difficulty increases due to conflict with the button module location
Solution Approach 1:
The patent divides the single ring radiator into multiple functional segments by introducing multiple feeding points (first feeding point, second feeding point, third feeding point) and grounding points. Each segment between feeding and grounding points can be independently optimized for different frequency bands (L1, L5, and other bands), allowing the antenna to achieve proper right-hand gain without requiring the feeding point to be at the conflicting 2-4 o'clock position.
Solution Approach 2:
The ring radiator is designed to serve multiple functions simultaneously: it acts as a radiator for L1 band, L5 band, and other frequency bands through different feeding point configurations. The same ring structure can be excited at different feeding points to achieve different operational modes, eliminating the need for separate antenna structures for different bands and avoiding the button module location conflict.
2Reliability
If the feeding point is positioned at the 2-4 o'clock position to ensure right-hand gain, then the antenna performance is improved, but the clearance space for the feeding point cannot be effectively guaranteed
Solution Approach 1:
By segmenting the ring radiator into multiple sections with different feeding points, the patent distributes the feeding requirements across multiple locations on the ring. This allows the antenna to achieve proper right-hand gain through coordinated operation of multiple segments rather than relying on a single feeding point at the problematic 2-4 o'clock position, thereby ensuring adequate clearance space.
Solution Approach 2:
The patent transitions from a single-point feeding approach to a multi-point feeding approach, adding the dimension of spatial distribution to the feeding strategy. By utilizing multiple feeding points distributed around the ring at different angular positions, the system achieves the desired radiation pattern without concentrating all feeding requirements at one location with insufficient clearance.
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
This configuration enables improved right-hand gain for both L1 and L5 frequency bands, allowing the feeding point to be placed at a position other than the traditional 2-4 o'clock location, simplifying manufacturing and enhancing the antenna's performance.
Implementation Method 1
The first antenna is configured to receive a first satellite positioning signal of a first frequency, the first antenna includes a first radiator between the feeding point and the first grounding point; The second antenna is configured to receive a second satellite positioning signal of a second frequency
Data Source
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AI summary
The present application is applicable to the field of antenna technology, and provides an antenna structure and a wearable electronic device. The antenna structure includes a ring radiator (100) provided with a feeding point, a first grounding point and a second grounding point, the feeding point is used for electrical connection to a location determination element, and the first grounding point and the second grounding point are used for grounding respectively; a first antenna (101) configured to receive a first satellite positioning signal of a first frequency, the first antenna (101) includes a radiator between the feeding point and the first grounding point; and a second antenna (102) configured to receive a second satellite positioning signal of a second frequency, the second antenna (102) includes a radiator between the first grounding point and the second grounding point. In the antenna structure provided by some embodiments of the present application, the feeding point is arranged at a position other than 2-4 points of the smart watch on the premise of improving the right-handed gain of the antenna structure toward the sky, so that the clearance space of the feeding point can be effectively guaranteed, and the difficulty of manufacturing the antenna structure and the wearable electronic device can be reduced.