Phase Shifter Assembly With Rear-Side Actuation and Slot Shielding
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Solution Overview
Problem
Existing phase shifter assemblies require significant surface space on substrates due to the arrangement of mechanical shifting components, which compromises signal quality and efficiency.
Innovation Solution
A phase shifter assembly design featuring a substrate with a vertical slot and a cover that allows actuation from the rear side, reducing front-side footprint and maintaining signal quality by preventing electromagnetic radiation through the slot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical shifting components are arranged on the front surface of the substrate, then the phase shifter assembly can be actuated, but the surface space required is large
Solution Approach 1:
The patent moves the actuation mechanism from the front surface to the rear surface of the substrate, utilizing the third dimension (depth/thickness) to resolve the space conflict. The slot provides access from the rear, allowing actuation components to be positioned on the opposite side from the radiators, thereby reducing front surface area occupation while maintaining full actuation functionality.
2Area of stationary object
If a slot is provided in the substrate for rear-side actuation, then surface space is reduced, but electromagnetic radiation may propagate through the slot
Solution Approach 1:
The cover acts as an intermediary element that fills the slot opening without obstructing the actuation mechanism's access through the slot from the rear. This intermediate structure prevents electromagnetic radiation from propagating through the slot while allowing the shifting device to move freely along the slot for phase adjustment.
3Reliability
If the cover covers the slot to prevent radiation, then signal quality is maintained, but the slot access may be blocked
Solution Approach 1:
The cover is designed with a specific geometry that segments the slot coverage - it covers the slot in the vertical direction to block radiation, but leaves the slot open in the horizontal direction to allow actuation access. This segmented approach selectively blocks harmful electromagnetic radiation while maintaining necessary mechanical accessibility.
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 achieves a compact phase shifter assembly that minimizes front-side space requirements while maintaining high signal quality and precision, enabling a compact antenna configuration.
Implementation Method 1
the cover prevents electromagnetic radiation propagating through the slot
Data Source
AI summary
A phase shifter assembly has two signal conductors, a ground plane, a substrate, a shifting device, and a cover. The signal conductors are located on the front surface and each comprise a delay section. The shifting device comprises an actuation portion and two shifting portions, the shifting portions being located at the front side of the substrate and covering one of the delay sections of the signal conductor at least partly. The shifting device is movable with respect to the substrate. The substrate comprises a slot vertically through the substrate, wherein the slot is located between the delay sections of the at least two signal conductors, and wherein the actuation portion of the shifting device extends through the slot. The cover is located on the front side of the substrate covering the slot and being electrically connected to the ground plane. Further, an antenna is provided.