Resonant Embedded Antenna PCB Integration
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Solution Overview
Problem
Existing wireless communication systems require separate antenna components that are costly and volumetrically inefficient, limiting the compactness and cost-effectiveness of wireless devices.
Innovation Solution
A planar antenna is integrated into a printed circuit board assembly, featuring a conductive layer with a feed conductor, patch, and overlapping arms, allowing for embedded antenna design without additional components, and adjusting arm lengths and widths to broaden the usable frequency range and control input impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate antenna components are used, then antenna functionality is achieved, but cost and volume increase
Solution Approach 1:
The patent combines the antenna structure with the PCB by integrating conductive traces and geometric patterns directly into the circuit board layers. The antenna elements are formed using the same conductive material and fabrication processes as the circuit traces, eliminating the need for separate antenna components and reducing overall device volume.
Solution Approach 2:
The PCB conductive layers serve dual functions: they provide both electrical interconnections for the circuit and radiating elements for antenna operation. The same conductive traces that carry signals between components also function as the antenna radiators, achieving multi-functionality and reducing component count.
2Reliability
If separate antenna components are used, then antenna functionality is achieved, but manufacturing cost increases
Solution Approach 1:
The antenna structure is merged with the PCB manufacturing process, using the same conductive material deposition and patterning techniques (such as copper traces) that are already employed for creating circuit board interconnections. This integration eliminates the need for separate antenna component procurement, assembly, and soldering operations.
Solution Approach 2:
The PCB fabrication process itself provides the antenna structure through standard conductive layer formation. The existing manufacturing capabilities for creating conductive traces and patterns on the PCB automatically generate the antenna elements without requiring additional specialized manufacturing steps or equipment.
3Volume of stationary object
If planar antenna is embedded in PCB, then volume is reduced, but frequency range and impedance control become more difficult
Solution Approach 1:
The antenna is divided into multiple discrete geometric segments or elements formed by conductive traces on different PCB layers. By segmenting the antenna structure into controllable sections, the patent enables independent adjustment of each segment's dimensions and positioning to optimize frequency response and impedance characteristics across a broader frequency range.
Solution Approach 2:
The patent utilizes the third dimension by stacking conductive antenna elements on multiple PCB layers separated by dielectric substrates. This vertical arrangement creates a three-dimensional antenna structure within the planar PCB footprint, enabling frequency range expansion through constructive and destructive interference patterns while maintaining compact volume.
4Volume of stationary object
If planar antenna is embedded in PCB, then volume is reduced, but impedance matching becomes more difficult
Solution Approach 1:
The patent incorporates adjustable and reconfigurable elements in the antenna design, such as variable trace widths, adjustable element lengths, and switchable configurations. These dynamic features allow impedance matching to be optimized for different operating conditions and frequency points, compensating for the constraints of the embedded planar structure.
Solution Approach 2:
The patent employs multiple geometric parameters (trace width, trace length, spacing between elements, dielectric thickness) that can be independently varied to control input impedance. By changing these physical parameters during design and fabrication, precise impedance matching can be achieved despite the integrated PCB configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The planar antenna design enhances frequency range and input impedance, achieving efficient omnidirectional energy radiation and reception, with improved cost-effectiveness and compactness compared to traditional antenna configurations.
Implementation Method 1
Resonant embedded antenna
Data Source
AI summary
A planar antenna, such as included as a portion of a printed circuit board assembly, can include a first conductive layer comprising a feed conductor and a patch. The planar antenna can include a second conductive layer comprising a reference conductor, a first arm defined by a first arm length and a first arm width, and a second arm located parallel to the first arm and defined by a second arm length and a second arm width. The first and second arms can be respectively coupled to the reference conductor, and at least a portion of the first arm and at least a portion of the second arm can overlap with a footprint of the patch projected vertically from a plane of the first conductive layer onto a plane of the second conductive layer.