Microstrip Antenna Beamforming via Coupling Member Gap
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Solution Overview
Problem
Microstrip antennas face challenges in down-sizing and beamforming due to their small size and limited effective antenna space in mobile devices, making it difficult to perform beamforming effectively without complex designs.
Innovation Solution
The design incorporates a microstrip antenna with a radiation portion and a coupling member on the same layer of a dielectric substrate, featuring a conductor with an opening and circular pads, allowing for adjustable gap spacing between the conductor and coupling member to control beam direction, enabling easy adjustment of beamforming without complex circuit configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to fit mobile devices, then the device size is reduced, but the effective antenna space is reduced making beamforming difficult
Solution Approach 1:
The antenna is divided into two separate functional parts: a radiation portion for signal transmission and a coupling member for ground connection. This segmentation allows each part to be optimized independently, enabling beamforming capability to be maintained or enhanced even as the overall antenna size is reduced for mobile device integration.
Solution Approach 2:
The coupling member is positioned within the opening of the radiation portion at a controlled gap distance, creating a three-dimensional structure. This vertical arrangement in the thickness direction of the substrate allows for compact planar footprint while maintaining effective beamforming through controlled electromagnetic coupling between the radiation portion and ground.
2Device complexity
If a traditional microstrip antenna design is used, then the structure is simple, but beamforming cannot be performed effectively
Solution Approach 1:
By separating the antenna into a radiation portion and a coupling member, the design achieves beamforming capability without requiring complex multi-element arrays. The segmented structure enables controlled electromagnetic coupling that directs beam formation while keeping the overall design relatively simple and suitable for integration in mobile devices.
3Reliability
If the gap between conductor and coupling member is reduced to increase coupling strength, then coupling efficiency improves, but beam direction control becomes difficult
Solution Approach 1:
The gap distance between the radiation portion and coupling member is designed as a variable parameter that can be adjusted to dynamically control both coupling strength and beam direction. This dynamic design allows optimization of coupling efficiency while maintaining the ability to steer beam direction by modifying the gap dimension, providing flexibility for different operational requirements.
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 allows for effective beamforming by adjusting the gap between the conductor and coupling member, optimizing beam direction and coupling strength, suitable for down-sized electronic devices without adding complexity, thus enhancing antenna performance in limited spaces.
Implementation Method 1
a coupling member coupled to a ground portion, disposed within the opening and spaced apart from the conductor by a gap
Data Source
AI summary
An antenna including a substrate, a radiation portion connected to a feed line, disposed on a layer of the substrate, and including a conductor having an opening, and a coupling member connected to a ground portion and disposed within the opening spaced apart from the conductor by a gap.