Patch Antenna Assembly With Parasitic Patch for Ultra-Wideband
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Solution Overview
Problem
Patch antennas have a very narrow bandwidth, which is unsuitable for certain applications despite their desirable compact size, and adding a parasitic patch element alone may not provide the required bandwidth.
Innovation Solution
An antenna device comprising a patch antenna element, a parasitic patch element, and a capacitive loading element, configured to achieve ultra-wideband bandwidth while maintaining a compact form, utilizing a feed line structure, capacitive loading, and precise spacing and positioning of parasitic patch elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a parasitic patch element is added to improve bandwidth, then the bandwidth of the patch antenna is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple bandwidth enhancement techniques into a single integrated antenna structure. The parasitic patch element is merged with the feed line structure, where the feed line is positioned between the radiating and parasitic patches. Additionally, capacitive loading elements are integrated at the corners of the radiating patch, creating a unified design that achieves ultra-wideband performance without requiring separate components for each function.
Solution Approach 2:
The feed line structure is nested within the space between the radiating patch and parasitic patch elements. The capacitive loading elements are positioned at the corners of the radiating patch, effectively utilizing the available space. This nested arrangement allows multiple functional elements to coexist in a compact configuration, enhancing bandwidth while controlling overall device complexity.
2Volume of moving object
If the antenna size is reduced to meet compact design constraints, then the physical size is reduced, but the bandwidth becomes even narrower
Solution Approach 1:
The patent transitions from a two-dimensional patch configuration to a three-dimensional structure by introducing a parasitic patch element positioned above the radiating patch at a specific height. This vertical dimensionality change allows the antenna to achieve ultra-wideband performance in a compact footprint, as the bandwidth enhancement is achieved through the third dimension rather than expanding the planar area.
Solution Approach 2:
The patent utilizes parameter optimization including the height separation between radiating and parasitic patches, the dimensions and positioning of capacitive loading elements at the patch corners, and the feed line configuration. By carefully adjusting these parameters, the antenna achieves ultra-wideband performance while maintaining a compact size, as the parameter changes enable resonant frequency control and impedance matching without increasing physical 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 solution provides an ultra-wideband performance with improved bandwidth, meeting the requirements of various applications while maintaining a small size profile.
Implementation Method 1
a capacitive loading element, with sides of a fifth length, a sixth length, a fifth width, and a sixth width configured to be positioned on the feed line between ends of a feed line length and proximate to the respective patch antenna element
Implementation Method 2
a parasitic patch assembly, configured to contain at least one parasitic patch element, with a fifth side of a third length, a sixth side of a fourth length, a seventh side of a third width, and a seventh side of fourth width
Data Source
AI summary
The disclosure is an antenna device, comprising a substrate layer and a patch antenna assembly on the substrate layer, configured to contain at least one patch antenna element. Each patch antenna element has a feed insertion cutout and a base cutout, where a feed line extending from a feed point on the substrate layer couples to the antenna element in the feed insertion cutout. Each patch antenna element corresponds to a respective parasitic patch element, positioned above the patch antenna element, and a respective capacitive loading element, positioned on the feed line and proximate to the patch antenna element, to improve the performance of the antenna device. Each parasitic pat antenna is larger than its respective patch antenna element. The antenna device may also include a mounting structure to position each parasitic patch element over each patch antenna element.