Microstrip Antenna Segmentation for 2.3-2.7 GHz Coverage
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Solution Overview
Problem
Current microstrip antennas, despite being small, do not adequately meet the demand for further reduction in size while maintaining frequency coverage for wireless communication devices operating at frequencies like 2.3 GHz and 2.7 GHz, such as in WiMAX standards.
Innovation Solution
A microstrip antenna design featuring a radiating portion with a first radiator, a second radiator in a zigzag shape, and a third radiator, positioned on a substrate with a feeding and grounding portion, optimized to enhance signal transceiving and frequency coverage within the specified frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional microstrip antenna designs (rectangular, round, or ring shaped) are used, then the antenna can be made small, but the frequency coverage and performance requirements cannot be adequately met
Solution Approach 1:
The radiating portion is divided into three separate radiators (first radiator with L-shape, second radiator with zigzag shape, third radiator with inverted L-shape), each contributing to different frequency ranges. This segmentation allows the antenna to cover a broader frequency spectrum (2.3 GHz to 2.7 GHz) while maintaining a compact overall structure, resolving the contradiction between small size and frequency coverage adaptability.
Solution Approach 2:
The patent utilizes the vertical dimension by positioning radiators at different heights above the grounding portion (different ground distances). The first radiator is positioned at a first distance, the second radiator at a second distance, and the third radiator at a third distance. This three-dimensional arrangement enables frequency differentiation and enhanced coverage without increasing the planar footprint, thus maintaining small size while improving frequency adaptability.
2Volume of moving object
If the antenna dimensions are reduced, then device compactness is improved, but signal transceiving efficiency deteriorates
Solution Approach 1:
Each radiator is designed with specific local characteristics optimized for its function: the first radiator has an L-shape with specific arm lengths, the second radiator has a zigzag shape with controlled impedance, and the third radiator has an inverted L-shape. These localized structural optimizations ensure efficient signal transceiving at each radiator's position, maintaining high reliability despite the overall compact size of the antenna.
Solution Approach 2:
The antenna design incorporates multiple radiators with different electrical lengths and impedance characteristics that can be dynamically activated or adjusted based on the operating frequency requirements. This dynamic capability allows the compact antenna to maintain optimal signal transceiving efficiency across the 2.3 GHz to 2.7 GHz frequency range, resolving the contradiction between small size and transceiving reliability.
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 design achieves efficient electromagnetic signal transceiving and frequency coverage between 2.3 GHz and 2.7 GHz, with a return loss of less than −10 dB, while allowing for smaller device dimensions.
Implementation Method 1
The radiating portion is positioned on the first surface, configured for transceiving the electromagnetic signals
Implementation Method 2
The feeding portion is positioned on the first surface, configured for feeding electromagnetic signals
Data Source
AI summary
A microstrip antenna positioned on a substrate includes a feeding portion, a grounding portion, and a radiating portion. The substrate includes a first surface and a second surface opposite to the first surface. The feeding portion is positioned on the first surface. The grounding portion is positioned on the second surface. The radiating portion is positioned on the first surface, and includes a first radiator, a second radiator in zigzag shape, and a third radiator. The first radiator includes a first radiating section and a second radiating section. The third radiator includes a third radiating section and a fourth radiating section. The first radiating section, the second radiating section, the second radiator, the third radiating section, and the fourth radiating section are perpendicular to one another connected one by one in sequence. The first radiator and the third radiator co-define a receiving area, and the second radiator is positioned in the receiving area.