Surface-Mount Horn Antenna PCB Integration for 60 GHz
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Solution Overview
Problem
Current solutions for integrating horn antennas into wireless communication devices in millimetric frequency bands are not cost-effective and bulk-efficient, particularly for general public applications, and do not adequately miniaturize the components for high-speed short-range communications.
Innovation Solution
A wireless communication device with a printed circuit board (PCB) that incorporates a surface-mounted horn antenna with a straight waveguide and radiating aperture, featuring ribs for polarization and reduced dimensions, molded in a single piece using materials like metallized plastic or zinc-based alloys, allowing direct contact or capacitive coupling with PCB tracks for low-loss signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If horn antennas are integrated using traditional screwing methods onto PCBs, then assembly is straightforward, but device size increases and manufacturing cost rises
Solution Approach 1:
The horn antenna is integrated directly into the PCB substrate, merging two previously separate components (antenna and PCB) into a single unified structure. This eliminates the need for separate mounting hardware and reduces overall device volume while maintaining ease of manufacture through standard PCB fabrication processes
Solution Approach 2:
The horn antenna structure is nested within the PCB layers, with the radiating aperture positioned on one surface and the feed structure integrated within the substrate. This nesting approach minimizes the external dimensions of the device while preserving the antenna's functional volume
2Reliability
If horn antennas are made larger for better radiation performance, then signal transmission improves, but integration into compact devices becomes difficult
Solution Approach 1:
The horn antenna structure is optimized with local geometric features including tapered sections and flared apertures at specific locations to enhance radiation performance. These localized quality improvements allow compact overall dimensions while maintaining effective signal transmission through strategically positioned radiating elements
Solution Approach 2:
The antenna design utilizes three-dimensional space efficiently by extending the horn structure in multiple dimensions within the PCB substrate. The waveguide progresses through the substrate thickness while the aperture flares outward, creating effective radiation from a compact footprint by exploiting the third dimension
3Productivity
If multiple horn antennas are integrated on a PCB for high data rates, then bandwidth capacity increases, but manufacturing complexity and cost increase
Solution Approach 1:
The PCB design incorporates a standardized horn antenna module that can be replicated multiple times across the board for different frequency bands and polarization directions. This universal module approach allows the system to achieve high bandwidth capacity through multiple antennas while maintaining simple manufacturing processes through standardization and repetition of proven designs
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 solution enables low-cost, low-bulk integration of horn antennas with negligible signal losses, facilitating high-speed short-range communications at frequencies like 60 GHz, while being compatible with standard assembly processes and reducing overall device size.
Implementation Method 1
a radiating aperture (31, 41) of generally frustoconical or truncated pyramidal shape... intended for communications in the millimeter frequency bands
Implementation Method 2
a printed circuit board (PCB) comprising a substrate of dielectric material and electrically conductive traces separated by the dielectric substrate
Implementation Method 3
each rib in direct contact or near a PCB trace, so as to allow direct connection or capacitive coupling between them
Data Source
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AI summary
The present invention relates to a wireless communication device comprising: - a printed circuit board (PCB) including a dielectric substrate and electrically conductive traces separated by the dielectric substrate; - at least one horn antenna. The horn antenna is a surface-mount component (SMD) mounted by means of flange(s) supported by and fixed to the PCB, and the horn antenna is arranged with the waveguide and the radiating aperture on either side of the PCB and with each rib in direct contact or near a trace of the PCB, so as to allow direct connection or capacitive coupling between them.