Multi-Band Antenna Gap Layout for Wideband Tuning
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Solution Overview
Problem
Existing mobile devices face challenges in implementing antennas that can operate across a wide frequency bandwidth without excessive complexity or space consumption, as conventional antenna layouts struggle to achieve desired performance across multiple resonant frequencies, and adding dedicated antennas or reconfigurable feeds becomes cumbersome.
Innovation Solution
The design of an antenna device with first and second conductors on a dielectric support, featuring gaps with varying distances between them, allowing for tuned impedance and coupling at different resonant frequencies, enabling operation across multiple frequency bands without reconfigurability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated antennas are provided for each radio technology, then each radio technology can operate in its specific frequency band, but the device complexity and space consumption increase
Solution Approach 1:
The patent implements a single antenna device that can operate across multiple frequency bands (e.g., 700 MHz, 1700 MHz, 2600 MHz) by using a non-uniform gap structure between conductors. This allows one antenna to replace multiple dedicated antennas, reducing device complexity while maintaining the ability to support different radio technologies including cellular, Wi-Fi, and Bluetooth
Solution Approach 2:
The antenna device uses a non-uniform gap structure where different regions of the gap have different distances between the first and second conductors. Specifically, the gap includes a first region with a first gap distance, a second region with a second gap distance, and a third region with a third gap distance. This local variation in gap distance enables the antenna to resonate at multiple frequencies simultaneously, achieving multi-band operation with a single antenna structure
2Adaptability or versatility
If reconfigurable feeds are implemented to achieve wide frequency bandwidth, then frequency adaptability improves, but device complexity increases
Solution Approach 1:
The antenna device achieves wide frequency bandwidth coverage by changing the physical parameter of gap distance across different regions. The non-uniform gap structure with varying distances (first gap distance in first region, second gap distance in second region, third gap distance in third region) creates multiple resonant frequencies without requiring reconfigurable feeds or switches, thus maintaining simplicity while achieving frequency adaptability
3Adaptability or versatility
If multiple dedicated antennas are added to cover wide frequency bands, then frequency bandwidth coverage improves, but space consumption increases
Solution Approach 1:
The patent merges the functionality of multiple dedicated antennas into a single antenna device. By combining multiple conductors (first conductor and second conductor) with a non-uniform gap structure on a common dielectric support, the device achieves multi-band operation in a compact form factor, significantly reducing the space required compared to having separate antennas for each frequency 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
The antenna device achieves desirable electromagnetic performance across a large frequency bandwidth with a static physical layout, reducing complexity and space consumption while maintaining performance across multiple resonant frequencies.
Implementation Method 1
The first gap distance may be configured to provide coupling at the first resonant frequency between the first conductor and the second conductor across the first region of the gap. The second gap distance may be configured to provide coupling at the second resonant frequency between the first conductor and the second conductor across the second region of the gap.
Implementation Method 2
The antenna device may be configured to operate at a first resonant frequency and a second resonant frequency different from the first resonant frequency. The first gap distance may correspond to the first resonant frequency. The second gap distance may correspond to the second resonant frequency.
Implementation Method 3
a dielectric support; a first conductor disposed on the dielectric support and comprising a signal feed terminal; and a second conductor disposed on the dielectric support and comprising a reference feed terminal
Data Source
AI summary
Described herein are antenna configurations that, in some embodiments, may be advantageously tuned to achieve desired electromagnetic performance over multiple resonant frequencies by providing control, in the design process, over some or all of the desired resonant frequencies. Such antenna configurations, in some embodiments, may be configured to achieve a large frequency bandwidth in a static physical layout, without necessarily resorting to a reconfigurable feed path.