Curved Antenna Module Segmented Base for Stable Connections
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Solution Overview
Problem
In antenna modules with stacked multilayer ceramic sheets, the uneven curvature of upper and lower green sheets leads to unstable electrical connections and decreased efficiency due to diagonally inclined via conductors and discontinuous impedance.
Innovation Solution
An antenna module design featuring a spherically curved base part with flat surfaces, connection terminals, antenna elements, connection wiring lines, and a ground wiring line, where the ground wiring line is formed by overlapping ground layers connected by via conductors, and a cover layer with radiation electrodes, ensuring stable electrical connections and improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If multiple upper green sheets are stacked to form a curved surface multilayer ceramic sheet, then the antenna module can achieve a curved surface structure, but the via conductors become diagonally inclined causing unstable electrical connections
Solution Approach 1:
The invention divides the curved surface into multiple flat green sheets stacked together, where each sheet maintains its own planar conductor patterns and via conductors. This segmentation allows each layer to have proper electrical connections while the overall structure forms a curved surface when stacked, resolving the contradiction between curved shape and connection stability.
Solution Approach 2:
The invention transitions from a single curved surface to a multi-layer stacked structure, adding the dimension of layering. Each layer is flat with proper electrical connections, while the stacking of multiple layers creates the desired curved surface profile, thus achieving both curved shape and stable connections.
2Reliability
If large-area lands are formed at via conductor connection points to secure stable electrical connections, then electrical connection stability improves, but the impedance of the load connected to the antenna becomes discontinuous and antenna efficiency decreases
Solution Approach 1:
The invention segments the electrical connection path into multiple layers, allowing each via conductor to connect to standard-sized lands on individual green sheets. The cumulative effect of multiple connection points across layers provides stable electrical connections without requiring excessively large lands that would disrupt impedance continuity.
Solution Approach 2:
The invention applies different connection strategies at different locations: standard-sized lands are used at via conductor connection points on each green sheet to maintain impedance continuity, while the stacked multi-layer structure provides the necessary electrical connection stability through cumulative connection strength.
Data Source
AI summary
A base part (110) has one main surface (111) that is spherically curved so as to protrude outward and another main surface (112) that is flat. A plurality of antenna elements (130) are provided along the one main surface (111) inside the base part (110). A plurality of connection wiring lines (150) connect the plurality of connection terminals (120) and the plurality of antenna elements (130) to each other. A part of each of the plurality of connection wiring lines (150) disposed in a region where a ground wiring line (140) is provided extends in a direction perpendicular to the other main surface (112) when viewed in a direction perpendicular to the other main surface (112).