Patch Antenna Coupling Gap Layout for Low Return Loss
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Solution Overview
Problem
Conventional patch antennas experience degraded performance due to increased return loss and interference between feeding pins when reduced in size, which affects signal reception.
Innovation Solution
The formation of a coupling gap between the lower patch and the feeding pin or patch, with a width of 0.5 mm to 1.5 mm, isolates the feeding elements to minimize interference and maintain antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the patch antenna is reduced, then the antenna meets market size requirements, but the return loss increases and antenna performance degrades
Solution Approach 1:
The patent divides the feeding structure into multiple feeding pins (at least two feeding pins) that are spatially separated. This segmentation allows the antenna to maintain compact overall size while providing sufficient spacing between individual feeding elements to reduce interference and maintain acceptable return loss characteristics.
Solution Approach 2:
The patent employs a multi-layered patch structure where upper and lower patches are positioned on opposite sides of the substrate, with feeding pins penetrating through the substrate to connect them. This nested configuration allows the antenna to achieve compact form factor while maintaining the electrical performance through controlled coupling between layers.
2Loss of energy
If the gap between feeding pins is reduced to minimize return loss, then the return loss decreases, but interference occurs between feeding pins and antenna performance degrades
Solution Approach 1:
The patent applies different gap distances to different feeding pins based on their specific positions and functions. The gap distance between each feeding pin and its corresponding patch is optimized independently, allowing minimal return loss for each feeding point while maintaining sufficient separation to prevent interference between adjacent feeding pins.
Solution Approach 2:
The patent optimizes the gap distances between feeding pins and patches to be within a specific range (0.5mm to 1.5mm) to dynamically balance two opposing requirements: small enough gaps to minimize return loss and large enough gaps to prevent interference. This dynamic optimization allows the antenna to achieve both low return loss and minimal interference 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
This design enhances antenna performance and transmission efficiency by reducing return loss and interference, ensuring optimal signal reception even in reduced antenna sizes.
Implementation Method 1
the feeding pin is isolated from the upper patch so that a coupling gap is formed
Implementation Method 2
there is a problem in that antenna performance is degraded because interference occurs between the feeding pins
Data Source
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AI summary
Disclosed is a patch antenna in which coupling gaps are formed between a lower patch and feed pins so as to maximize the performance of the antenna. The disclosed patch antenna comprises: a base layer; an upper patch disposed on the upper surface of the base layer; a lower patch disposed on the lower surface of the base layer; and feed pins passing through the base layer, upper patch, and lower patch, wherein the feed pins are spaced from the upper patch and thereby form coupling gaps.