Planar Antenna With Stacked Parasitic Patch For Dual-Band Operation
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Solution Overview
Problem
Conventional planar inverted F antennas (PIFA) have a limited signal receiving/transmitting area due to their narrower beam width, which restricts their communication capabilities, especially in dual-frequency operations.
Innovation Solution
A planar antenna structure is designed with a ground conductor, a first radiating patch, a shorting patch, and a second radiating patch, where the second radiating patch acts as a parasitic antenna, increasing the signal receiving/transmitting area by overlapping projections on the ground conductor, and further divided into portions to operate in two different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a conventional PIFA structure is used, then the antenna can operate at specific frequencies, but the beam width is narrow which limits the signal receiving/transmitting area
Solution Approach 1:
The patent introduces a second radiating patch positioned above the first radiating patch, transitioning from a single-layer to a multi-layer structure. This dimensional addition expands the effective radiating area and broadens the beam width, directly resolving the contradiction between limited area and narrow beam width in conventional PIFA designs
2Adaptability or versatility
If a groove is added to divide the radiating patch for dual-frequency operation, then two frequency bands can be operated, but the beam width remains narrow and signal receiving area is still limited
Solution Approach 1:
The patent divides each radiating patch into multiple sections using grooves, creating first and second radiating portions in the first patch, and third and fourth radiating portions in the second patch. This segmentation enables dual-frequency operation while the stacked configuration of two patches collectively increases the signal receiving/transmitting area, overcoming the limitation of single-patch segmentation
3Area of moving object
If the second radiating patch is added above the first radiating patch, then the signal receiving/transmitting area is increased, but the device complexity increases
Solution Approach 1:
The patent positions the second radiating patch directly above the first radiating patch in a stacked configuration, with projections of both patches on the ground conductor overlapping. This nesting arrangement maximizes space utilization and achieves area expansion without proportionally increasing structural complexity, as the two patches share the same horizontal footprint
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
The design enhances the signal receiving/transmitting area and allows for broader beam widths at both 2.45 GHz and 5.25 GHz frequencies, improving communication performance in dual-frequency operations.
Implementation Method 1
the second radiating patch acts as a parasitic antenna, increasing the signal receiving/transmitting area by overlapping projections on the ground conductor
Data Source
AI summary
A planar antenna structure including a ground conductor, a first radiating patch, a shorting patch and a second radiating patch is provided. The first radiating patch is disposed above the ground conductor. One end of the shorting patch is connected with the ground conductor, and the other end thereof is connected with one side of the first radiating patch. A projection of the first radiating patch on the ground conductor is located on one side of a projection of the shorting patch on the ground conductor. The second radiating patch is disposed above the ground conductor and the first radiating. A projection of the second radiating patch on the ground conductor traverses both sides of the projection of the shorting patch on the ground conductor. The projection of the second radiating patch on the ground conductor partially overlaps with the projection of the first radiating patch on the ground conductor.