Dual-Radiator Antenna Structure for Same-Band Isolation
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Solution Overview
Problem
Conventional antenna structures in electronic devices struggle to integrate multiple antennas for spatial multiplexing while ensuring isolation between antennas operating on the same frequency bands, leading to inadequate coverage of multiple frequency bands simultaneously.
Innovation Solution
The antenna structure integrates two antennas with separate radiators, where one radiator serves as a reference ground for the other, utilizing a signal reference ground, feeding lines, and optional features like through holes and shorting connectors to ensure high isolation and reduce space occupancy, allowing both antennas to cover the same frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single radiator is shared between two antennas for spatial multiplexing, then space occupancy is reduced, but isolation between antennas operating on the same frequency band cannot be ensured
Solution Approach 1:
The patent divides the antenna system into two independent radiators (first radiator and second radiator) instead of sharing a single radiator. Each radiator has its own feeding point and is electrically connected to the signal reference ground through separate conductive connectors, enabling independent operation while maintaining spatial compactness.
Solution Approach 2:
The patent combines multiple antennas into a compact integrated structure where both radiators are mounted on the same signal reference ground within the electronic device. The conductive connectors are integrated into the ground structure, achieving spatial multiplexing without compromising isolation through proper electrical connection design.
2Volume of moving object
If multiple antennas are integrated for spatial multiplexing, then space occupancy is reduced, but the device complexity increases
Solution Approach 1:
The signal reference ground serves multiple functions: it acts as the reference ground for both antennas, provides the mounting substrate for both radiators, and serves as the electrical connection path for the conductive connectors. This multi-functionality reduces the need for separate ground structures for each antenna.
Solution Approach 2:
The antenna structure is nested within the electronic device housing, with the radiators and conductive connectors integrated into the existing ground structure. The compact design allows the antenna system to be embedded within the device body, minimizing additional space requirements.
3Reliability
If antennas operate on different frequency bands, then isolation is improved, but the ability to cover the same frequency band simultaneously is lost
Solution Approach 1:
Each radiator is designed with specific local characteristics (different geometries, sizes, or configurations) that enable them to operate on the same frequency band while maintaining distinct radiation patterns and impedance characteristics. This local differentiation ensures proper isolation despite operating on the same frequency.
Solution Approach 2:
The conductive connectors act as intermediaries between the radiators and the signal reference ground. By carefully designing the electrical connection path through these connectors, the patent achieves proper impedance matching and isolation control, enabling both antennas to operate on the same frequency band simultaneously.
Data Source
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AI summary
Embodiments of this application provide an antenna structure and an electronic device, and relate to the field of electronic device technologies, so that the antenna structure can be integrated with two antennas to implement spatial multiplexing, and can cover a same frequency band. The antenna structure includes a signal reference ground, a first antenna, and a second antenna. The first antenna includes a first radiator and a first feeding line, the first radiator has a first feeding point, the first radiator is fed from the first feeding point through the first feeding line, and the first radiator is electrically connected to the signal reference ground. The second antenna includes a second radiator and a second feeding line, the second radiator has a second feeding point, the second radiator is fed from the second feeding point through the second feeding line, the second feeding line includes a signal transmission line and a signal reference ground line, and the signal reference ground line is electrically connected to the first radiator. The antenna structure provided in embodiments of this application is used in an electronic device.