Hub-Spoke-Rim Phase Shifter for Compact Patch Antennas
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Solution Overview
Problem
Existing phase shifters for patch antennas are limited in their ability to accommodate both circularly and linearly polarized waves, making it difficult to integrate them into compact antenna devices.
Innovation Solution
A phase shifter design comprising a hub, spoke, and rim structure with switch groups that allows for phase control regardless of polarization, enabling integration into patch antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switched line phase shifter is used to achieve a phase shift range up to 360 degrees and large scanning angle, then the phase control capability is improved, but it becomes difficult to incorporate into a small antenna device such as a patch antenna
Solution Approach 1:
The phase shifter is divided into multiple discrete switchable line segments arranged in a compact configuration. Each segment can be independently controlled by switches, allowing the signal to traverse different path lengths to achieve various phase shifts. This segmentation enables the phase shifter to achieve 360-degree phase control while maintaining a small form factor suitable for patch antenna integration.
Data Source
AI summary
A phase shifter that includes a hub portion that is connected to a power-feeding point of a patch antenna, a switch group that includes a plurality of switches, a spoke portion that is disposed radially centered on the hub portion and includes a plurality of radial lines that is electrically connected to the hub portion via any of the plurality of switches, and a rim portion that is disposed along an arc centered on the hub portion and includes a plurality of arcuate lines that is electrically connected to the plurality of radial lines via any of the plurality of switches.