Embedded Antenna Structure for Compact Wireless Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Integrating wireless communication circuitry and antennas into electronic systems poses challenges due to the need for specialized RF connectors and cabling, as well as grounding and shielding issues, which can be cumbersome and complex.
Innovation Solution
A surface mount assembly with an integrated antenna structure on a printed circuit board (PCB) that includes a first conductive portion on the exterior and a second conductive portion buried within the dielectric sheet, featuring a curved transition and parallel conductive strips to provide a broad bandwidth and efficient impedance matching, reducing sensitivity to environmental variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate antenna assembly is used, then reliable communications coverage is provided, but the system becomes cumbersome involving specialized RF connectors and cabling
Solution Approach 1:
The patent combines the antenna structure with the PCB assembly by integrating conductive portions directly into the PCB layers. The first conductive portion is formed in an outer signal layer and the second conductive portion is formed in an inner layer, merging the antenna function with the circuit board structure. This eliminates the need for separate antenna assemblies, RF connectors, and cabling while maintaining reliable communications coverage.
2Area of stationary object
If wireless communication circuitry is placed in proximity to other non-wireless circuitry, then space is saved, but grounding and shielding challenges arise
Solution Approach 1:
The patent uses the dielectric layers of the PCB as an intermediary between the wireless communication circuitry and other non-wireless circuitry. The dielectric material provides natural electrical isolation and shielding, eliminating the need for additional grounding and shielding structures. This allows wireless and non-wireless circuitry to coexist in close proximity without interference or complex shielding requirements.
3Manufacturing precision
If a narrow-band antenna is used, then impedance matching is achieved at specific frequencies, but the antenna is highly sensitive to material parameter variations and environmental changes
Solution Approach 1:
The patent transitions from a traditional planar antenna design to a three-dimensional embedded structure by utilizing multiple PCB layers. The antenna structure extends through the thickness of the PCB with conductive portions in different layers connected by vias, creating a volumetric rather than surface-only configuration. This dimensional change provides additional degrees of freedom for impedance control and reduces sensitivity to environmental variations.
Solution Approach 2:
The patent utilizes the composite structure of the PCB itself (conductive layers combined with dielectric material) to form the antenna. This integration of conductor and dielectric in a composite configuration provides inherent stability against material parameter variations and environmental changes, as the antenna performance is determined by the overall PCB structure rather than a single material property.
Data Source
AI summary
An apparatus includes a dielectric sheet, and an antenna structure. The antenna structure comprises a first conductive portion located on an exterior surface of the dielectric sheet and a second conductive portion buried in the dielectric sheet and configured for coupling to a return portion of the wireless communication circuit. The second conductive portion includes a plane area adjacent to the first conductive portion in a region proximal to the feed portion and separated from the first conductive portion by a portion of the dielectric sheet, a curved transition portion, the transition portion including a lateral width that tapers along the length of the second conductive portion, and a distal portion comprising two parallel conductive strips, the distal portion electrically coupled to the plane area via the curved transition portion, wherein the parallel conductive strips are thinner in lateral width than the plane area.