Multiband Antenna Structure for LTE Frequency Coverage
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Solution Overview
Problem
Current antenna designs fail to efficiently support multiple frequency bands required for evolving wireless communication systems like LTE, which vary by region and require antennas to operate across a wide range of frequencies including lower frequencies not adequately covered by existing multiband antennas.
Innovation Solution
A multiband antenna structure comprising two radiating units on a substrate, where the first radiating unit operates at a first frequency and the second radiating unit at a second frequency, with their terminals or paths strategically positioned to excite a third frequency lower than both, achieved through coupling paths that extend across both units, allowing for efficient operation across a broader frequency range including lower LTE frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional single-band or dual-band antenna designs are used, then the antenna structure is simple, but it cannot support multiple frequency bands including lower LTE frequencies required by evolving wireless communication systems
Solution Approach 1:
The patent combines two radiating units (first and second radiating units) into a single antenna structure that can operate across multiple frequency bands. The first radiating unit handles higher frequencies (e.g., GSM, UMTS) while the second radiating unit handles lower frequencies (e.g., LTE 700/800 MHz), merging their functions into one integrated antenna system that reduces the need for multiple separate antennas
Solution Approach 2:
The antenna structure is designed with multi-functionality to support various wireless communication standards including 2G (GSM 900/1800), 3G (UMTS 1900/2100), and 4G (LTE 700/800/1800/2600) across different regions. The first and second radiating units can be independently or collectively activated depending on the required frequency band, making the antenna universally applicable to multiple communication systems
2Reliability
If separate antennas are used for different frequency bands, then each antenna can be optimized for its specific band, but the device occupies more space and has higher complexity
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated structure by placing the first radiating unit and second radiating unit in close proximity on the same substrate. This consolidation reduces the overall volume occupied by antenna systems while maintaining the ability to operate reliably across different frequency bands through selective activation of appropriate radiating units
3Area of stationary object
If the antenna structure is compact to reduce device size, then space occupancy is reduced, but achieving good impedance matching across multiple frequency bands becomes difficult
Solution Approach 1:
The patent applies local quality by designing the first and second radiating units with different geometric characteristics optimized for their respective frequency ranges. The first radiating unit has dimensions and configuration suited for higher frequencies, while the second radiating unit has dimensions optimized for lower frequencies. This localized optimization allows each unit to achieve good impedance matching in its target band while maintaining a compact overall footprint
Solution Approach 2:
The antenna structure incorporates adjustable or reconfigurable elements that allow dynamic optimization of impedance matching across different frequency bands. By selectively activating specific radiating units or adjusting coupling parameters between them, the system can dynamically adapt to maintain optimal impedance matching regardless of which frequency band is currently in use
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 design generates a plurality of operating frequencies, including a lower frequency essential for LTE systems, with good impedance matching and reduced space occupancy, effectively addressing the need for multiband operation without interference from conducting elements.
Implementation Method 1
The first radiating unit, disposed on the substrate, has a feed-in end, a first radiating path and a first terminal, and is operated at a first operating frequency. The second radiating unit, disposed on the substrate, has a grounding end, a second radiating path and a second terminal, and is operated at a second operating frequency.
Implementation Method 2
The first terminal of the first radiating unit is adjacent to the second radiating path or the second terminal of the second radiating unit is adjacent to the first radiating path, so that the first radiating unit or the second unit excites a third operating frequency, wherein the third operating frequency is lower than the lower frequency among the first operating frequency and the second operating frequency.
Data Source
AI summary
A multiband antenna structure comprises a substrate, a first radiating unit and a second radiating unit. The first radiating unit is disposed on the substrate, having a feed-in end, a first radiating path and a first terminal. The first radiating unit is operated at a first operating frequency. The second radiating unit is disposed on the substrate and has a grounding end, a second radiating path and a second terminal. The second radiating unit is operated at a second operating frequency. The first terminal of the first radiating unit is adjacent to the second radiating path or the second terminal of the second radiating unit is adjacent to the first radiating path for the first radiating unit or the second unit to excite a third operating frequency. The third operating frequency is lower than the lower frequency among the first operating frequency and the second operating frequency.