Spiral Antenna Unit for Multi-Frequency Radio Communication
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Solution Overview
Problem
Existing radio communication devices face challenges with stub antennas that protrude and are prone to mechanical damage, and patch antennas that require excessive space and complex current feed systems, leading to issues with handling, aesthetics, and electromagnetic coupling.
Innovation Solution
A multiple resonant antenna unit with a single spiral antenna branch that functions as both a first resonant structure for a lower frequency range and a second resonant structure for a higher frequency range, integrated within the device, reducing space requirements and simplifying current feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stub antennas are used for radio communication, then antenna functionality is achieved, but the device becomes awkward to handle and the antennas are prone to mechanical damage
Solution Approach 1:
The patent integrates the antenna structure directly into the housing of the radio communication device, merging two previously separate components (antenna and housing) into a unified structure. This eliminates protruding stub antennas while maintaining antenna functionality, thereby improving both mechanical durability and handling comfort.
2Adaptability or versatility
If patch antennas with multiple current feed contacts are used, then multiple frequency ranges can be covered, but the current feed system becomes too complex and electromagnetic coupling effects occur
Solution Approach 1:
The patent employs a single spiral antenna branch that serves multiple functions by operating at multiple frequency ranges. The spiral structure inherently supports multiple resonant frequencies, allowing one antenna element to replace what would traditionally require multiple separate antenna elements with complex feed systems, thereby simplifying the overall device complexity while maintaining versatility.
Solution Approach 2:
The patent utilizes electromagnetic coupling effects not as a problem to be avoided but as a mechanism to enable multi-frequency operation. By designing the spiral antenna branch to exploit coupling between different portions of the spiral, the patent converts what would traditionally be a harmful effect into a beneficial mechanism for achieving multi-resonant operation with a single feed point.
3Adaptability or versatility
If patch antennas with multiple current feed contacts are used, then multiple frequency ranges can be covered, but the space required in the device becomes excessive
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated spiral antenna structure that is embedded within the housing. This merging approach allows the antenna to occupy minimal space while maintaining the capability to operate across multiple frequency ranges, thereby reducing the overall volume requirement compared to traditional multi-element antenna configurations.
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 compact design allows for efficient radio communication in multiple frequency ranges without excessive space usage, enhancing the device's handling and aesthetics while minimizing electromagnetic coupling issues.
Implementation Method 1
the total course of the spiral antenna branch forms a first resonant antenna structure for a lower frequency range and at least one portion inside the total course of the spiral antenna branch forms a second resonant antenna structure for a higher frequency range
Data Source
AI summary
A multiple resonant antenna unit (AT2) comprises a current feed area (SPI) from which only a single, spiral-like antenna branch (AZI) emanates. The total course of this spiral-like antenna branch (AZI) forms a first resonant antenna structure for a low frequency range and at least one partial section (SE15) inside the total course of this spiral-like antenna structure (AZI) forms a second resonant antenna structure for a higher frequency range.