Multiband Antenna With Perpendicular Radiation Element
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Solution Overview
Problem
Existing multiband antennas face challenges in achieving reduced size while maintaining operation at multiple frequencies, as they often require larger slot lengths for lower resonant frequencies, which complicates design and size optimization.
Innovation Solution
The proposed multiband antenna incorporates a slot antenna and a radiation element, where the slot extends in one direction and the radiation element extends from the slot, allowing for a reduced size by lowering the resonant frequency of the slot antenna, enabling operation at multiple frequencies with a smaller form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the slot length is increased to achieve lower resonant frequencies, then the antenna can operate at multiple frequencies, but the antenna size increases
Solution Approach 1:
The patent introduces a radiation element extending in a direction different from the slot direction (perpendicular or oblique orientation). This dimensional change allows the antenna to achieve lower resonant frequencies through the radiation element's length rather than increasing the slot length, thereby maintaining compact size while enabling multi-frequency operation
Solution Approach 2:
The patent combines a slot antenna structure with an additional radiation element into a single integrated antenna system. This merging allows the antenna to utilize both the slot's resonant characteristics and the radiation element's resonant characteristics, achieving multi-frequency operation without requiring separate antennas or excessively long slots
2Length of stationary object
If the slot length is reduced to decrease antenna size, then the antenna becomes more compact, but the resonant frequency increases and multi-band operation is compromised
Solution Approach 1:
By adding a radiation element that extends perpendicular or oblique to the slot direction, the patent creates a new dimensional pathway for achieving lower resonant frequencies. This allows the slot to remain short for compact size while the radiation element provides the necessary electrical length for lower frequency operation
Solution Approach 2:
The radiation element serves multiple functions: it acts as a resonant element for lower frequency operation, provides additional radiation patterns, and works in conjunction with the slot to enable multi-frequency operation. This multi-functionality allows compact size while maintaining broad frequency coverage
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
This configuration allows the multiband antenna to operate at a plurality of frequencies with a reduced size compared to antennas without radiation elements, effectively optimizing size and frequency performance.
Implementation Method 1
the multiband antenna has two resonant frequencies, namely, a resonant frequency of the slot antenna and a resonant frequency of the radiation element
Data Source
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AI summary
A multiband antenna comprises a slot antenna and a radiation element. The slot antenna has a conductive plate. The conductive plate is formed with an opening portion and a slot. The slot partially opens through the opening portion. The slot extends long in a first direction. The radiation element has a first portion and a second portion. The first portion extends from the conductive plate toward an orientation away from the slot in a second direction perpendicular to the first direction. The first portion has a first length in the second direction. The second portion extends in the first direction from the first portion. The second portion has a second length in the first direction. The second length is greater than the first length.