Slotted Patch Antenna for Dual-Band Wireless Devices
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Solution Overview
Problem
Compact electronic devices face challenges in accommodating wireless antennas due to space constraints and the complexity of tuning antennas for dual-frequency bands like 2.4 GHz and 5 GHz, which can lead to increased specific absorption rate (SAR) and additional production costs.
Innovation Solution
A compact patch antenna design with two slots on its radiating surface, each with open and short circuit edges, allowing for flexible tuning and resonance frequency control, enabling operation as a dual-band antenna without compromising signal strength or bandwidth, and accommodating the antenna within a display unit frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact patch antenna design with slots is used, then the antenna size is reduced and it can be accommodated in constrained spaces, but the tuning complexity for dual-frequency bands increases
Solution Approach 1:
The patch antenna is segmented by introducing two slots that divide the radiating surface into multiple regions. These slots create separate resonant paths that can be independently tuned for different frequency bands (2.4 GHz and 5 GHz), allowing dual-band operation in a compact form factor without requiring complex external tuning mechanisms
Solution Approach 2:
The antenna design utilizes parameter changes by varying the dimensions, positions, and orientations of the slots to control the resonant frequencies. By adjusting slot parameters such as length, width, and placement on the radiating surface, the antenna can be tuned for dual-frequency operation while maintaining a compact size
2Reliability
If the antenna is positioned in the enclosure with pre-defined clearances, then interference with other components is prevented, but the specific absorption rate (SAR) increases causing overheating
Solution Approach 1:
The antenna design transitions from a planar configuration to a three-dimensional structure by incorporating vertical elements and multi-layer construction. This dimensional change allows the antenna to achieve better SAR distribution by radiating energy in multiple directions rather than concentrating it in a single plane, reducing hot spots while maintaining clearance requirements
3Ease of manufacture
If a slot is cut in the metal portion and covered with plastic filling member painted with metal-finish paints, then the antenna can be mounted in the enclosure, but additional material cost and production steps are required
Solution Approach 1:
The antenna element is merged directly with the metal enclosure structure, eliminating the need for separate plastic filling members and metal-finish paint coatings. The antenna is designed to be mounted in a slot that is an integral part of the metal portion, combining multiple components (enclosure, slot, antenna mounting structure) into a unified design that reduces material costs and production steps
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 provides a compact, dual-band antenna that meets signal strength and bandwidth specifications, reduces SAR issues, and eliminates space constraints, while offering tuning flexibility and cost-effective production by integrating the antenna within the display unit frame.
Implementation Method 1
Each of the two slots has an open circuit edge and a short circuit edge
Data Source
AI summary
The present subject matter describes antennas. In an example of the present subject matter, an antenna comprises a patch antenna element having a radiating surface. Two slots are formed on the radiating surface, each of the two slots having an open circuit edge and a short circuit edge.