Angled Antenna Module Layout for Multi-Band Signal Isolation
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Solution Overview
Problem
The 5G mobile communication system faces challenges in adequately combining high-frequency signals across multiple frequency bands, leading to reduced isolation between radiating elements and increased noise interference due to inadequate hybrid circuit design.
Innovation Solution
An antenna module with a first and second plate section intersecting at an angle other than 180°, connected by a wiring layout that minimizes line length differences between feed points, using hybrid circuits and RFIC to optimize signal combination and isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the hybrid circuit is designed to optimize operation at a specific frequency, then the combining performance at that frequency is improved, but the combining performance at frequencies deviating from the specific frequency deteriorates
Solution Approach 1:
The patent applies dynamics by making the electrical length of feed lines adjustable or variable rather than fixed. By changing the electrical length of feed lines connecting radiating elements to the hybrid circuit, the system can adapt to different frequencies, allowing the hybrid circuit to maintain optimal combining performance across a wide frequency range rather than being optimized for a single frequency point.
2Adaptability or versatility
If feed lines are routed via the connecting section, then the radiating elements can be fed in the non-selected dielectric board, but the isolation between radiating elements of different plate sections is reduced
Solution Approach 1:
The patent applies dimensionality change by utilizing the spatial separation between the first and second dielectric boards in different orientations. By routing feed lines through the connecting section that physically connects these separated boards, the system achieves signal routing flexibility while the spatial distance and orthogonal arrangement provide natural isolation, reducing noise interference between radiating elements of different plate sections.
3Power
If the hybrid circuit combines high-frequency signals at multiple frequency bands, then the power output is increased, but the isolation between radiating elements deteriorates due to inadequate combining at certain frequencies
Solution Approach 1:
The patent applies parameter changes by adjusting the electrical length of feed lines to match the wavelength of different frequency bands. By changing the electrical length parameter of feed lines connecting radiating elements to the hybrid circuit, the system maintains proper impedance matching and phase relationships across multiple frequency bands, enabling effective signal combining while preventing noise interference that would occur with inadequate combining.
Data Source
AI summary
An antenna module includes a first plate section and a second plate section that intersect at an angle other than 180°, and at least one circuit. Each circuit includes first radiating elements on the first plate section and second radiating elements on the second plate section. A radio frequency integrated circuit (RFIC) is on a surface of the first plate section and includes a plurality of input-output terminals for high-frequency signals. Hybrid circuits are on the first plate section, each with two input ports and two output ports. Input traces for each hybrid circuit connect the hybrid circuit input ports to the RFIC, while first and second traces connect the hybrid circuit output ports to the first and second radiating elements, respectively. The hybrid circuits at least partially overlap the RFIC. A number of hybrid circuits on either side of a center plane is equal to or differs by one.