Dielectrically-Loaded Diversity Antenna for Compact Bodypack Transmitters
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Solution Overview
Problem
Portable wireless communication devices face challenges in adapting to changes in spectrum availability while maintaining high-quality broadband performance and aesthetically pleasing designs, particularly due to limitations in antenna size and space within bodypack devices.
Innovation Solution
The solution involves an antenna assembly configured to fully encase an antenna element within a dielectrically-loaded antenna housing, with two separate antenna housings providing maximum spatial diversity and a manufacturing process that includes depositing dielectric materials and a conductive gasket to enhance radiated efficiency and broadband coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a reduced-size antenna is integrated into the bodypack housing to maintain a compact design, then the overall package size is reduced and aesthetics are improved, but radiated efficiency and broadband antenna coverage are insufficient
Solution Approach 1:
The antenna element is fully encased within a dielectrically-loaded housing structure. The dielectric material is deposited inside the housing to form a nested configuration where the antenna element is surrounded by the dielectric load, maximizing the use of internal space while maintaining compact external dimensions. This nesting approach allows the small antenna to achieve enhanced radiated efficiency through the dielectric loading effect.
Solution Approach 2:
The dielectric material is deposited to adjust the electrical parameters of the antenna system. By controlling the dielectric constant and the volume of dielectric material deposited within the housing, the antenna's resonant frequency, impedance, and radiated efficiency are optimized. This parameter adjustment allows a compact antenna to achieve broadband performance that would normally require a larger physical size.
2Volume of moving object
If a reduced-size antenna is integrated into the bodypack housing to maintain a compact design, then the overall package size is reduced and aesthetics are improved, but broadband antenna coverage is insufficient
Solution Approach 1:
The antenna element is fully encased within a dielectrically-loaded housing structure. The dielectric material is deposited inside the housing to form a nested configuration where the antenna element is surrounded by the dielectric load, maximizing the use of internal space while maintaining compact external dimensions. This nesting approach allows the small antenna to achieve enhanced radiated efficiency through the dielectric loading effect.
Solution Approach 2:
The dielectric material is deposited to adjust the electrical parameters of the antenna system. By controlling the dielectric constant and the volume of dielectric material deposited within the housing, the antenna's resonant frequency, impedance, and radiated efficiency are optimized. This parameter adjustment allows a compact antenna to achieve broadband performance that would normally require a larger physical size.
3Reliability
If wireless microphone systems are designed for operation in specific spectrum bands, then performance in that band is optimized, but the systems cannot be repurposed for other spectrums without replacing the existing antenna
Solution Approach 1:
The antenna assembly with dielectric loading is designed to provide broadband coverage that can accommodate multiple spectrum bands. The dielectric material's properties and the antenna housing dimensions can be optimized to support operation across different frequency ranges, allowing the same antenna structure to serve multiple functions and spectrum allocations without requiring replacement.
Solution Approach 2:
The dielectric material is deposited to adjust the electrical parameters of the antenna system. By controlling the dielectric constant and the volume of dielectric material deposited within the housing, the antenna's resonant frequency, impedance, and radiated efficiency are optimized. This parameter adjustment allows a compact antenna to achieve broadband performance that would normally require a larger physical 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
This configuration allows for adaptable operation across different frequency bands with improved radiated efficiency and broadband performance, minimizing interference and maintaining a compact, aesthetically pleasing design.
Implementation Method 1
an antenna assembly configured to fully encase an antenna element within a dielectrically-loaded antenna housing
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
Embodiments include an antenna assembly comprising a non-conductive housing having an open end; an antenna element positioned inside the non-conductive housing; an electrical cable having a first end electrically coupled to the antenna element and a second end extending out from the open end; one or more dielectric materials positioned inside the non-conductive housing; and a conductive gasket coupled to a portion of the electrical cable positioned adjacent to the open end and outside the non-conductive housing. One embodiment includes a portable wireless bodypack device comprising a frame having a first external sidewall opposite a second external sidewall; a first antenna housing forming a portion of the first sidewall and including a first diversity antenna; and a second antenna housing forming a portion of the second sidewall and including a second diversity antenna. Embodiments also include a method of manufacturing an antenna assembly for a portable wireless bodypack device.