Multiband Antenna Using Magnetic Conductor Reflector for Bandwidth and Gain
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Solution Overview
Problem
Conventional dual polarization antennas struggle to cover multiple frequency bands simultaneously, such as those in the LTE wireless communication system, due to limitations in bandwidth and physical dimensions, leading to suboptimal performance in interference patterns and isolation between polarizations.
Innovation Solution
A multiband antenna configuration method that uses a magnetic conductor reflector with a mushroom-type structure and Bishop's Hat dipole antennas, adjusting the distance and geometric features to achieve constructive interference across multiple frequency bands, thereby enhancing gain, bandwidth, and isolation while minimizing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional dual polarization antennas are used, then the antenna structure is simple, but the antenna cannot cover all frequency bands simultaneously
Solution Approach 1:
The patent implements a universal antenna structure that can operate across multiple frequency bands (Band 7, Band 20, and extended bands) by integrating dual polarization capability and magnetic conductor reflector technology into a single antenna system, eliminating the need for separate antennas for different bands
Solution Approach 2:
The patent employs composite material structures including magnetic conductor reflectors with specific geometric patterns (mushroom-type, split-ring resonators) combined with conventional antenna elements to achieve multiband operation through material property optimization rather than structural complexity
2Volume of moving object
If antenna dimensions are reduced to meet smaller product requirements, then the antenna size decreases, but the bandwidth and gain are compromised
Solution Approach 1:
The patent utilizes parameter optimization of the magnetic conductor reflector geometry (spacing, size, pattern) to achieve bandwidth enhancement in a compact antenna structure, where specific parameter ranges of the reflector elements compensate for the reduced overall antenna dimensions
Solution Approach 2:
The patent introduces vertical dimension utilization through the magnetic conductor reflector positioned beneath the antenna element, creating a three-dimensional radiation pattern that enhances bandwidth and gain without increasing the planar footprint of the antenna
3Power
If the distance between magnetic conductor reflector and radiation portion is increased to improve gain, then the antenna gain increases, but the antenna size increases
Solution Approach 1:
The patent optimizes the spacing parameter between the magnetic conductor reflector and radiation portion to achieve maximum gain enhancement within a compact distance, where the specific spacing value (optimized through parameter study) provides the best trade-off between gain improvement and size constraint
4Device complexity
If conventional antenna configuration is used, then the antenna design is simple, but the isolation between polarizations is insufficient
Solution Approach 1:
The patent introduces the magnetic conductor reflector as an intermediary element between the two polarization elements, which actively manages the electromagnetic field distribution to enhance isolation between polarizations through constructive and destructive interference control
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 achieves constructive interference across multiple frequency bands, increasing antenna gain, broadening bandwidth, and improving isolation between polarizations, while reducing the physical size of the antenna to meet the demands of modern wireless communication systems.
Implementation Method 1
a magnetic conductor reflector configured to reflect the radio signals in order to increase gain of the multiband antenna
Implementation Method 2
the configuration requirement is utilized to make the radio signals and reflection of the radio signals interfere constructively in at least one position in space
Data Source
AI summary
A multiband antenna configuration method for configuring a multiband antenna to transmit and receive radio signals of a plurality of frequency bands includes determining a distance between a magnetic conductor reflector and a first radiation portion, calculating a first and second reflection phase value at the first and second center frequency of a first and second frequency band according to a configuration requirement corresponding to the distance, determining a length and width of the multiband antenna, adjusting materials and geometric features of the magnetic conductor reflector to change a curve representing relationship between reflection phases of the magnetic conductor reflector and frequencies and to make the first reflection phase corresponding to the first center frequency and the second reflection phase corresponding to the second center frequency equal to a first reflection phase value and second reflection phase value, and determining the materials and geometric features according to the curve.