Tunable Multiband Antenna Resolving Detuning and Complexity
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Solution Overview
Problem
Conventional mobile unit antennas require multiple antennas for different frequency bands and suffer from detuning effects due to user interference, leading to inefficient operation across global networks.
Innovation Solution
A combined antenna design with an elongate element, including a first portion for low-band frequencies, a second portion for high-band frequencies, and a third portion for tuning, along with a tuning element coupled in a middle position to maintain high-band frequency efficiency while allowing low-band frequency tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used for different frequency bands, then frequency band coverage is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple antenna functions into a single inverted-F antenna structure that supports both low-band and high-band frequency operations. The antenna includes a resonant element with specific length and width dimensions that enable it to operate across multiple frequency bands, eliminating the need for separate antennas for each band and reducing overall device complexity.
Solution Approach 2:
The inverted-F antenna is designed as a universal antenna that can operate across multiple frequency bands including low-band and high-band frequencies. By configuring the resonant element with specific dimensional parameters, the antenna achieves multi-functionality, serving as a single antenna solution for various frequency band requirements.
2Ease of operation
If a conventional combined antenna with tuning element at the end is used, then low-band frequency tuning is achieved, but high-band frequency efficiency deteriorates
Solution Approach 1:
The patent segments the antenna into distinct functional portions: a resonant element for low-band operation and a coupled element for high-band operation. The resonant element has a first portion and a second portion with specific length ratios, while the coupled element is positioned at a specific distance from the resonant element. This segmentation allows independent optimization of low-band and high-band performance without mutual interference.
Solution Approach 2:
Different portions of the antenna are given different local properties optimized for their respective frequency bands. The resonant element is designed with specific dimensions for low-band resonance, while the coupled element is positioned and dimensioned to optimize high-band coupling. This local quality differentiation enables each portion to perform its specific function efficiently.
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 the transceiver to operate efficiently across multiple frequency bands with improved resistance to user interference, achieving high-band efficiency of over 50% and low-band efficiency of over 40%, supporting global network compatibility.
Implementation Method 1
a tuning element (401) coupled to the combined antenna (400) at a coupling (605) disposed in a substantially middle position of the elongate element (402) of the combined antenna (400), the tuning element (401) configured to tune the low-band frequency
Implementation Method 2
the transceiver is capable of connecting to the network on a particular operating frequency of the network. Accordingly, the antenna is designed to transmit/receive signals from the transceiver to the network on the operating frequency
Data Source
AI summary
An electronic device includes an antenna for a transceiver to operate in a plurality of frequencies. The antenna includes a first portion that is coupled to an elongate element and is configured to enable the transceiver to operate in a first low-band frequency and a first high-band frequency. A second portion is also coupled to the elongate element. The second portion is configured to enable the transceiver to operate in a second high-band frequency. A third portion is coupled to the elongate element and is situated between the first and second portions. The third portion is configured to tune the first and the second high-band frequencies associated with the first and second portions. A tuning element is configured to tune the low-band frequency associated with the first portion such that the first and the second high-band frequencies are not significantly affected by tuning the tuning element.