Multi-Cavity Antenna Feed Layout for Low-Coupling Integration
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Solution Overview
Problem
Conventional antenna apparatuses require large spacing between feed lines to reduce coupling, leading to increased size and resonance interference, hindering miniaturization and integration.
Innovation Solution
A feeding apparatus with multiple cavities and signal lines, including a third signal line to compensate for length differences, reduces coupling and eliminates the need for excessive space, enabling compact design and improved signal consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If feed lines are disposed in a single cavity, then the arrangement space is reduced, but coupling between feed lines increases
Solution Approach 1:
The feeding apparatus is divided into multiple cavities (first cavity, second cavity, third cavity), with each cavity containing a limited number of signal lines. This segmentation isolates the electromagnetic fields of different signal lines, reducing coupling while minimizing the overall volume of the feeding apparatus.
2Object-generated harmful factors
If large spacing is provided between feed lines, then coupling is reduced, but the size of the antenna apparatus increases
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement by distributing signal lines across multiple cavities positioned at different locations and orientations. This multi-dimensional configuration allows adequate electromagnetic isolation without requiring large planar spacing, thereby reducing the overall size of the antenna apparatus.
3Device complexity
If a large cavity is used to accommodate multiple signal lines, then integration is improved, but resonance interference occurs at high frequencies
Solution Approach 1:
Instead of using a single large cavity, the feeding apparatus employs multiple smaller cavities. Each cavity supports a limited number of signal lines, preventing the formation of resonant modes at high frequencies while maintaining good integration through the compact multi-cavity structure.
4Ease of manufacture
If signal line lengths are unequal, then routing flexibility is improved, but signal consistency deteriorates
Solution Approach 1:
The patent incorporates a compensation mechanism that adjusts the electrical length of signal lines to achieve equal effective lengths despite physical routing differences. This parameter adjustment ensures consistent signal timing and phase across all radiating elements while maintaining routing flexibility for manufacturing.
Data Source
AI summary
This application provides a feeding apparatus. The feeding apparatus includes a first cavity, a second cavity, a third cavity, and a signal line. The signal line includes a first signal line, a second signal line, and a third signal line, the first signal line is configured to connect to the first radiating element group of the antenna apparatus, and the second signal line is configured to connect to the second radiating element group of the antenna apparatus. The first signal line is located in the first cavity, the second signal line is located in the second cavity, and the third signal line is located in the third cavity. The third signal line is configured to electrically connect to the radio frequency apparatus of the communication device, and the third signal line is electrically connected to the first signal line and the second signal line separately.