Dual Dielectric Antenna for Compact Dual-Pol Dual-Band Performance
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Solution Overview
Problem
Current antenna systems face challenges in achieving high directivity and bandwidth in dual-pol dual-band mode while maintaining a compact arrangement, particularly in mobile radio applications, due to limitations in existing dielectric resonator antennas and active antenna arrays.
Innovation Solution
A compact antenna device with orthogonal polarization and multiple resonance frequency ranges, utilizing two dielectric bodies with different relative permittivities, where the second dielectric body enhances the bandwidth and directivity of the resonance frequency ranges, allowing for overlapping resonance frequencies and reducing the need for filters, thereby improving antenna diagrams and bandwidth in dual-pol dual-band mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If dielectric resonator antennas with high relative permittivity are used for compact group antennas, then compact arrangement and integration density are improved, but directivity and bandwidth deteriorate
Solution Approach 1:
The antenna system is segmented into multiple dielectric resonators with different relative permittivities. The first dielectric body has high relative permittivity for compactness, while the second dielectric body has lower relative permittivity to enhance bandwidth and directivity. This segmentation allows each component to fulfill specific functions that collectively resolve the contradiction between compact size and performance.
Solution Approach 2:
The patent employs composite dielectric structures combining materials with different relative permittivities. The first dielectric body (higher εr) provides miniaturization, while the second dielectric body (lower εr) compensates for the bandwidth and directivity limitations. This composite approach enables the antenna to achieve both compact arrangement and adequate bandwidth/directivity performance.
2Productivity
If multiple transmission and receiver amplifiers are used for beam-steering and MIMO mode, then system performance and data rate are improved, but cost and reliability deteriorate
Solution Approach 1:
The antenna device is designed with multi-functionality to support both beam-forming and MIMO modes using a single integrated structure. The combination of first and second dielectric bodies enables the antenna to perform multiple functions (dual polarization, dual band, beam steering) without requiring separate amplifier systems for each function, thereby reducing component count and improving reliability while maintaining high data rates.
3Device complexity
If separate active antenna arrays are realized for every transmission and receiver band, then filter use is reduced, but device complexity and space requirements increase
Solution Approach 1:
The antenna device achieves universal operation across multiple transmission and receiver bands through its dual dielectric body structure. The first dielectric body generates the resonance frequency ranges while the second dielectric body adjusts bandwidth and directivity, enabling the single antenna structure to handle multiple bands without requiring separate antenna arrays or extensive filtering, thus reducing both complexity and space requirements.
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 proposed antenna device achieves improved antenna diagrams and bandwidths in dual-pol dual-band mode, enabling efficient data transmission and reception across a wide frequency range, reducing the need for filters and minimizing space requirements, while maintaining a compact design suitable for mobile radio applications.
Implementation Method 1
at least one first dielectric body (1) mounted on the printed circuit board 100 and designed as a resonator
Implementation Method 2
the second dielectric body 2 increases the bandwidth of the resonance frequency ranges or matches the directivity
Data Source
AI summary
The invention relates to an antenna device having a printed circuit board and at least one antenna radiator which is arranged on the printed circuit board and can be excited by the printed circuit board or a coupling window arranged thereupon, which radiator is designed in such a manner that it comprises at least two polarisations, which are preferably orthogonal to each other, and at least two resonance frequency ranges which are continuous or different to one another and at an interval from one another, wherein the antenna radiator comprises: at least one first dielectric body mounted on the printed circuit board and designed as a resonator, having a first relative permittivity, at least one second dielectric body designed as, having a second relative permittivity, wherein the first relative permittivity is greater than the second relative permittivity and wherein the second dielectric body is formed in such a manner that it is arranged over the at least one first dielectric body in such a manner that it bundles or scatters the electrical field in a plane orthogonal to the main beam direction at least in one of the resonance frequency ranges. The invention also relates to an antenna array.