Metal Plate Loop Antenna Width Tuning for Wider Bandwidth
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Solution Overview
Problem
Existing loop antennas have a narrow adaptable bandwidth, making it difficult to support communication standards that utilize multiple frequency channels, such as ultra-wide band wireless communication.
Innovation Solution
Designing the metal plate antenna with specific loop lengths and widths to achieve a prescribed standing wave ratio, utilizing mirror image effects with ground planes, and incorporating switchable notch filters to adapt to different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional loop antenna is used, then the structure is simple, but the adaptable bandwidth is narrow
Solution Approach 1:
The patent applies parameter changes by setting the loop length to 1.5 wavelengths of the wireless signal and designing the antenna width to achieve a prescribed standing wave ratio. These specific parameter adjustments enable the antenna to operate across a wider frequency band while maintaining a relatively simple loop structure, thus resolving the contradiction between bandwidth adaptability and structural complexity
2Adaptability or versatility
If the loop length is set to 1.5 wavelength, then the bandwidth increases, but the radiation resistance becomes difficult to control
Solution Approach 1:
The patent simultaneously optimizes two parameters: the loop length is set to 1.5 wavelengths to expand bandwidth, while the antenna width is specifically designed to achieve a prescribed standing wave ratio. This coordinated parameter adjustment ensures that radiation resistance remains controllable within acceptable ranges, resolving the contradiction between bandwidth expansion and radiation resistance control
3Adaptability or versatility
If the antenna width is increased, then the radiation resistance decreases, but the antenna size increases
Solution Approach 1:
The patent determines the antenna width as a specific parameter that achieves a prescribed standing wave ratio when the loop length is 1.5 wavelengths. This optimized width value balances the competing requirements: it is sufficient to reduce radiation resistance to acceptable levels for wide bandwidth operation, yet minimized to avoid excessive antenna size
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 metal plate antenna achieves a wider bandwidth, supporting multiple frequency channels and enabling adaptability to varying communication standards by reducing radiation resistance and reactance, with the option to switch frequency bands post-manufacture.
Implementation Method 1
in a resonant mode in which a loop length of the metal plate antenna is 1.5 wavelength of a wireless signal
Implementation Method 2
utilizing mirror image effects with ground planes
Data Source
AI summary
There is provided a metal plate antenna transmitting and receiving wireless signals conforming to a prescribed communication standard, wherein an antenna width is designed to satisfy radiation resistance achieving a prescribed standing wave ratio in a resonant mode in which a loop length of the metal plate antenna is 1.5 wavelength of a wireless signal conforming to the prescribed communication standard.