Antenna Substrate With Radial Opening For Spacing Stability
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Solution Overview
Problem
Existing antenna substrates face challenges in maintaining consistent spacing between antenna conductors for efficient electromagnetic wave transmission and reception, leading to instability and deformation, especially when cavities are densely arranged.
Innovation Solution
The antenna substrate comprises a layered structure of cap, frame, and base substrates with strategically arranged insulating layers and conductors, where the second insulating layer includes radially outward opening portions to encircle the first antenna conductors, maintaining constant spacing and enhancing mechanical strength, and a sealing resin is used to join the substrates and protect the cavity from external factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cavities are densely arranged to reduce the antenna substrate size, then the compactness is improved, but the spacing between antenna conductors becomes inconsistent leading to deformation and instability
Solution Approach 1:
The antenna substrate is divided into multiple substrates (first substrate, second substrate, third substrate) that are stacked and connected. This segmentation allows each substrate to be optimized independently while maintaining overall compactness, and the connection structures between substrates provide stable spacing for the antenna conductors even when cavities are densely arranged.
2Reliability
If the spacing between antenna conductors is maintained for efficient electromagnetic wave transmission, then the transmission efficiency is improved, but the antenna substrate size increases
Solution Approach 1:
The antenna substrate transitions from a two-dimensional planar structure to a three-dimensional stacked structure. By arranging antenna conductors on different substrates in the vertical dimension, the patent maintains appropriate spacing for efficient electromagnetic wave transmission while reducing the horizontal footprint, achieving compact size without sacrificing transmission efficiency.
3Volume of moving object
If the antenna substrate is made compact with dense cavity arrangement, then the miniaturization is improved, but the mechanical strength decreases leading to deformation
Solution Approach 1:
The antenna substrate uses a composite structure consisting of multiple substrates (first substrate with cavity, second substrate with antenna conductor, third substrate) connected by connection structures. This composite construction provides enhanced mechanical strength compared to a single substrate, preventing deformation even when the overall size is reduced through dense cavity arrangement.
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
Included are a cap substrate 10 including first antenna conductors 12 arranged lengthwise and crosswise on both surfaces of a first insulating layer 11 and aligned to face each other and also a first connection pad 13 disposed on an outer peripheral edge of a lower surface of the first insulating layer 11; a frame substrate 20 including a second connection pad 22 disposed on an outer peripheral edge of an upper surface of a second insulating layer 21 and also a third connection pad 23 disposed on an outer peripheral edge of a lower surface of the second insulating layer 21; and a base substrate 30 including a plurality of second antenna conductors 32 arranged on an upper surface of a third insulating layer 31 and also a fourth connection pad 34 disposed on an outer peripheral edge of the upper surface of the third insulating layer 31, wherein the base substrate 30, the frame substrate 20, and the cap substrate 10 are layered in this order, and the second insulating layer 21 includes a first opening portion 26 having an outer periphery located radially outward from an outer periphery of the first antenna conductor 12 in a top view.