Modular Circularly Polarized Array Antenna Layout Against PCB Warping
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Solution Overview
Problem
Conventional array antenna devices face issues of asymmetrical warping due to thick dielectric layers and inability to replace individual damaged patch antennas, leading to performance degradation.
Innovation Solution
The array antenna device features a symmetrically arranged multi-layer structure with detachable antenna modules, beamforming chips, amplifiers, and grounding conductive pillars, ensuring structural integrity and allowing for individual replacement of damaged modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick dielectric layer is used to optimize the performance of the patch antennas, then the antenna performance is improved, but the printed circuit board warps due to asymmetrical stacking structure
Solution Approach 1:
The patent applies asymmetry principle by designing a symmetrical stacking structure where identical antenna modules and dielectric layers are arranged symmetrically on both sides of the circuit board. This symmetry compensates for the warping effect caused by thick dielectric layers, maintaining board flatness while allowing optimized antenna performance.
2Device complexity
If patch antennas are integrated onto a single printed circuit board, then the device structure is compact, but damaged antenna modules cannot be replaced individually leading to performance degradation
Solution Approach 1:
The patent divides the antenna system into independent, replaceable modules. Each antenna module can be individually detached and replaced through welded structures, allowing maintenance and repair without affecting other modules. This segmentation maintains compact integration while enabling individual module replacement.
3Device complexity
If patch antennas are integrated onto a single printed circuit board, then the device structure is compact, but the antenna modules cannot be detached for maintenance
Solution Approach 1:
The patent implements a dynamic design where antenna modules can be detachably connected and disconnected from the circuit board through welded structures. This allows the system to transition between integrated and separable states, enabling easy maintenance while maintaining compact structure during operation.
Data Source
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AI summary
An array antenna device (100) includes a carrier (1), and a plurality of circularly polarized antenna modules (2), at least one beamforming chip (4), and a plurality of amplifiers (3) that are disposed on the carrier (1). The carrier (1) has a thickness direction (DT), and includes a circuit portion (11), a plurality of antenna portions (12), and a plurality of welded structures (13). The circuit portion (11) includes a plurality of boards that are stacked on each other. The boards are symmetrically arranged along a symmetry axis that is perpendicular to the thickness direction (DT). The antenna portions (12) are disposed on the circuit portion (11). Each of the antenna portions (12) is detachably connected to the circuit portion (11) through one of the welded structures (13). The circularly polarized antenna modules (2) are respectively disposed on the antenna portions (12). The beamforming chip (4) is electrically connected to the circularly polarized antenna modules (2). The amplifiers (3) are disposed on the circuit portion (11).