Multi-band Antenna with Capacitive Loop Resonance
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Solution Overview
Problem
Conventional antennas for wireless communication devices are typically external and can only operate in a few frequency bands, making them inconvenient for consumers and limiting their functionality in modern wireless communication systems that utilize multiple frequency bands such as GSM, UMTS, and AMPS.
Innovation Solution
An antenna design that includes a set of radiating elements generating resonances in multiple frequency bands, utilizing a loop formed by capacitive coupling between elements to achieve simultaneous operation in multiple bands, allowing for internal integration within wireless devices and efficient signal transmission and reception across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional external antennas are used for precise operation in desired frequency bands, then signal transmission reliability is improved, but device portability and consumer acceptance deteriorate
Solution Approach 1:
The patent combines the antenna system with the mobile phone body by integrating multiple radiating elements directly into the device housing. The radiating elements are embedded within the phone structure, merging the antenna function with the device body, thereby eliminating the need for external antennas while maintaining multi-band operation capability.
Solution Approach 2:
The patent designs a universal antenna system that can operate across multiple frequency bands (GSM 850, GSM 900, GSM 1800, GSM 1900, UMTS, and AMPS) using a single integrated structure. The radiating elements are configured to support various communication standards simultaneously, making the antenna system adaptable to different frequency requirements without needing separate antennas for each band.
2Reliability
If conventional external antennas are used for operation in specific frequency bands, then signal transmission quality is improved, but adaptability to multiple frequency bands deteriorates
Solution Approach 1:
The patent designs a universal antenna system that can operate across multiple frequency bands (GSM 850, GSM 900, GSM 1800, GSM 1900, UMTS, and AMPS) using a single integrated structure. The radiating elements are configured to support various communication standards simultaneously, making the antenna system adaptable to different frequency requirements without needing separate antennas for each band.
Solution Approach 2:
The patent divides the antenna system into multiple radiating elements (first, second, third, and fourth elements) with different geometries and configurations. Each element is optimized for specific frequency ranges, and their combined operation enables coverage across all required bands. The segmentation of the radiating structure allows each element to contribute to specific frequency bands while working together as an integrated system.
3Adaptability or versatility
If multiple separate antennas are used for each frequency band, then operation in each band is optimized, but device complexity increases
Solution Approach 1:
The patent combines the antenna system with the mobile phone body by integrating multiple radiating elements directly into the device housing. The radiating elements are embedded within the phone structure, merging the antenna function with the device body, thereby eliminating the need for external antennas while maintaining multi-band operation capability.
Solution Approach 2:
The patent designs a universal antenna system that can operate across multiple frequency bands (GSM 850, GSM 900, GSM 1800, GSM 1900, UMTS, and AMPS) using a single integrated structure. The radiating elements are configured to support various communication standards simultaneously, making the antenna system adaptable to different frequency requirements without needing separate antennas for each band.
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
Enables reliable and efficient signal transmission and reception across multiple frequency bands, including GSM, UMTS, and AMPS, without the need for external antennas, enhancing the functionality and user acceptance of wireless communication devices.
Implementation Method 1
utilizing a loop formed by capacitive coupling between elements
Implementation Method 2
A plurality of resonances is generated in the plurality of frequency bands. A first resonance is generated in a first frequency band by a first radiating element. A second resonance is generated in a second frequency band by a second radiating element.
Data Source
AI summary
An wireless communication device with an antenna (400) for sending and receiving signals in a plurality of frequency bands generates a plurality of resonances in the plurality of frequency bands and includes a first radiating element (402) that generates a first resonance in a first frequency band, a second radiating element (404), coupled to and extending at an angle from the first radiating element (402), that generates a second resonance in the first frequency band, and a third radiating element (406), coupled to and extended at an angle from the first radiating element (402). A capacitive coupling between the second radiating element (404) and the third radiating element (406) generates a loop with a third resonance in the first frequency band, and the third radiating element (406) generates a fourth resonance in a second frequency band independent of the loop at the second frequency band.