Polygonal Feed Pad Antenna for 60 GHz Signal Transmission
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Solution Overview
Problem
High-frequency communications systems operating at 60 GHz in the EHF band face significant signal transmission loss due to high frequency, requiring multiple antennas embedded in printed circuit boards, which poses challenges in design and efficiency.
Innovation Solution
The design of an antenna with feed pads and a radiating portion, where the feed pads are polygonal and positioned to face the radiating portion, with vias connecting them to feed patterns, and a meta ground part, allowing for dual polarization and high gain, while maintaining a compact size by optimizing the area and position of the feed pads relative to the radiating portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas are embedded in a printed circuit board to compensate for high signal transmission loss at 60 GHz, then signal transmission reliability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The antenna system is segmented into four independent feed pads arranged in a specific geometric configuration, each capable of being fed independently. This segmentation allows the system to achieve diversity gain and improve reliability through multiple transmission paths while maintaining a relatively simple overall structure that can be integrated into the printed circuit board
Solution Approach 2:
The antenna structure is designed to support multiple functions: it can operate in dual-polarization mode for MIMO applications, support beamforming through independent feed control, and maintain compatibility with standard printed circuit board manufacturing processes. This multi-functionality improves reliability without proportionally increasing complexity
2Area of moving object
If the feed pads are made smaller relative to the radiating portion to achieve compact size, then the form factor is reduced, but the coupling efficiency between feed pads and radiating portion may deteriorate
Solution Approach 1:
The feed pads are positioned at specific distances from the radiating portion along the vertical dimension (z-axis), creating a three-dimensional feed structure. This dimensional approach allows compact in-plane dimensions while maintaining effective coupling through optimized vertical spacing, resolving the contradiction between small form factor and coupling efficiency
Solution Approach 2:
The patent optimizes specific parameters including the distance between feed pads and radiating portion, the dimensions of feed pads relative to the radiating portion, and the positioning geometry. These parameter changes enable compact size while maintaining or improving coupling efficiency through mathematically optimized configurations
3Loss of energy
If the feed pads are positioned closer to the radiating portion to reduce reflection loss, then radiation efficiency is improved, but the available space for other components is reduced
Solution Approach 1:
By utilizing the vertical dimension for feed pad positioning rather than only in-plane positioning, the design achieves optimal coupling distance for reduced reflection loss while preserving horizontal space for other components. The feed pads are positioned at optimized heights above or below the radiating portion plane
Solution Approach 2:
The feed pads are positioned asymmetrically relative to the radiating portion, with specific offset distances optimized to minimize reflection loss. This asymmetric positioning allows efficient coupling while maintaining space for other components in different areas of the board
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 antenna achieves improved efficiency and gain, reducing reflection loss and increasing radiation area, enabling effective high-frequency signal transmission with a smaller form factor, suitable for EHF band applications.
Implementation Method 1
a first via having a first end coupled to the first feed pad; and a second via having a first end coupled to the second feed pad
Implementation Method 2
a radiating portion disposed on one side of the feed pads and spaced apart from the feed pads, the radiating portion being constituted by a single conductor plate
Data Source
AI summary
An antenna includes feed pads; a radiating portion disposed on one side of the feed pads and spaced apart from the feed pads, the radiating portion being constituted by a single conductor plate; and a ground part disposed on an opposite side of the feed pads from the radiating portion; wherein each of the feed pads has a polygonal shape.