Angled Sub-Array Antenna Layout for Wideband Miniaturization
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Solution Overview
Problem
The challenge is to reduce the size of antenna modules while maintaining the desired frequency band width, as the size of the dielectric substrate affects the frequency band width of radio waves and the size of radiating elements is limited by the frequency of the radio waves they emit.
Innovation Solution
The antenna module is configured with sub-arrays of radiating elements disposed at an angle on a dielectric substrate, allowing for a reduction in substrate size without compromising the frequency band width, by overlapping the operable band widths of radiating elements with different sizes or impedance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the dielectric substrate is reduced to shrink the antenna module, then the size of the antenna module is reduced, but the frequency band width of radio waves is compromised
Solution Approach 1:
The antenna module is divided into multiple sub-arrays, each containing multiple radiating elements. This segmentation allows the antenna to maintain a compact overall size while each sub-array contributes to the frequency band width, resolving the contradiction between small size and wide frequency band
Solution Approach 2:
Different sub-arrays are configured with different radiating element characteristics (sizes, impedance) to optimize for different frequency ranges. This local differentiation allows the compact antenna to achieve wide overall frequency band width by combining the specialized characteristics of each sub-array
2Volume of moving object
If the size of radiating elements is reduced to fit in smaller antenna modules, then the antenna module size is reduced, but the frequency of radio waves that can be radiated is limited
Solution Approach 1:
The antenna is segmented into multiple sub-arrays with different radiating element sizes. Larger elements handle lower frequencies while smaller elements handle higher frequencies, allowing the compact antenna to radiate across a wide frequency range despite the small overall size
Solution Approach 2:
The patent varies the parameters (sizes, impedance values) of radiating elements across different sub-arrays to optimize performance at different frequencies. This parameter differentiation allows small radiating elements to effectively radiate higher frequency waves while the system as a whole maintains capability across multiple frequency bands
Data Source
AI summary
An antenna module includes a plurality of sub-arrays arranged in an array. A first sub-array and a second sub-array are disposed adjacent to each other in a first direction. The first sub-array includes a first radiating element and a second radiating element disposed adjacent to each other in a second direction. The second sub-array also includes first and second radiating elements disposed adjacent to each other in the second direction. The second direction is a direction in which the first radiating element of the second sub-array is viewed from the first radiating element of the first sub-array and is a direction in which the second radiating element of the first sub-array and the second radiating element of the second sub-array are viewed. An angle ϕ formed between the first direction and the second direction is larger than 0° and smaller than 90°.