Dual-Port Antenna Feeding Layout for Lower Mutual Coupling
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Solution Overview
Problem
Current antennas face challenges in achieving high bandwidth-to-volume ratio, signal isolation, and compact size to support advanced communication standards like 5G with MIMO and dual-polarization diversity, leading to inefficiencies in both transmit and receive modes due to symmetric feeding elements causing strong port-to-port mutual coupling.
Innovation Solution
The design incorporates a pair of radiators with asymmetrically configured feeding elements, where each pair of feeding elements has distinct geometric configurations and projections, reducing mutual coupling by optimizing the distribution and overlap of feeding elements to improve isolation and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If symmetric feeding elements are used, then the antenna structure is simple and easy to manufacture, but strong port-to-port mutual coupling occurs reducing signal isolation
Solution Approach 1:
The patent applies asymmetry by configuring the first feeding element with a first geometric shape and the second feeding element with a second geometric shape that is asymmetric to the first geometric shape. This asymmetric configuration reduces port-to-port mutual coupling between the feeding elements while maintaining manufacturability, directly resolving the contradiction between ease of manufacture and mutual coupling reduction.
2Volume of moving object
If compact antenna size is achieved, then the device is slim and portable, but bandwidth-to-volume ratio becomes limited
Solution Approach 1:
The patent employs dimensionality change by positioning the feeding elements at different heights above the ground plane (first feeding element at first height, second feeding element at second height). This vertical dimensionality allows the antenna to achieve compact horizontal footprint while maintaining adequate bandwidth-to-volume ratio through three-dimensional spatial arrangement.
Solution Approach 2:
The asymmetric geometric configurations of the feeding elements enable more efficient space utilization, allowing the antenna to achieve compact size while maintaining performance characteristics.
3Volume of moving object
If feeding elements are positioned close together, then the antenna is compact, but port-to-port mutual coupling increases reducing signal isolation
Solution Approach 1:
The asymmetric geometric shapes of the feeding elements are specifically designed to minimize overlapping projections while maintaining compact overall dimensions. The first feeding element has a first projection and the second feeding element has a second projection that is asymmetric, reducing mutual coupling even when positioned close together.
Solution Approach 2:
By utilizing vertical separation (different heights above ground plane) in addition to horizontal positioning, the patent achieves compact volume while reducing mutual coupling through three-dimensional spatial arrangement.
Data Source
AI summary
An antenna and an electronic device including the antenna are provided. The antenna includes a pair of radiators, a pair of feeding elements, first and second feeding ports. The radiators are located beside a geometric origin and separated from each other. The geometric origin is located between the radiators. The feeding elements are located below the pair of radiators and are configured to feed signals to the radiators. The pair of feeding elements includes a first feeding element and a second feeding element that are separated from each other. The first feeding element has a first geometric configuration. The second feeding element has a second geometric configuration that is asymmetric to the first geometric configuration. The first feeding port is electrically connected to the first feeding element. The second feeding port is separated from the first feeding port and electrically connected to the second feeding element.