Multi-band Antenna Device with Nested Loop and T-shaped Element
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antenna devices are limited to communicating in a single frequency band, lacking the capability to operate effectively in multiple frequency bands.
Innovation Solution
The antenna device incorporates a ground plane with a protruding metallic member forming a loop and a T-shaped antenna element, where the loop's length corresponds to one wavelength in a first frequency and two wavelengths in its second harmonic, and the antenna element's length from the feeding point to its ends corresponds to a quarter wavelength in a third frequency, enabling communication across three frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-frequency antenna is used, then the antenna structure is simple, but the antenna can only communicate in a single frequency band
Solution Approach 1:
The antenna device achieves multi-functionality by integrating a loop antenna and a T-shaped antenna element that can operate across multiple frequency bands. The loop antenna resonates at a first frequency and its second harmonic, while the T-shaped element resonates at a third frequency, enabling the single antenna structure to communicate in multiple frequency bands simultaneously
Solution Approach 2:
The T-shaped antenna element is positioned within the enclosed space formed by the loop antenna structure. This nested configuration allows both antenna elements to coexist in a compact arrangement, with the T-shaped element's feeding point disposed inside the loop's enclosed space, achieving multi-frequency operation without significantly increasing overall device footprint
2Adaptability or versatility
If multiple antenna elements are added to support multiple frequency bands, then frequency band coverage is improved, but the device complexity increases
Solution Approach 1:
The invention merges the loop antenna and T-shaped antenna element into a single integrated antenna device. The loop antenna provides resonance at the first frequency and its second harmonic, while the T-shaped element provides resonance at the third frequency. By combining these elements in a compact nested arrangement rather than using separate antennas, the device achieves multi-frequency band coverage without proportionally increasing complexity
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
This configuration allows the antenna device to efficiently communicate in multiple frequency bands, including 2.45 GHz, 5 GHz, and 3.5 GHz bands, enhancing its communication capabilities and suitability for multi-input multi-output (MIMO) formats.
Implementation Method 1
a length of the first loop corresponds to an electric length of one wavelength in a first frequency, and corresponds to an electric length of two wavelengths in a second frequency that is a second order harmonic of the first frequency
Data Source
AI summary
An antenna device includes a ground plane that includes an edge and a surface, a protruding metallic member that includes a first connecting part and a second connecting part coupled to the ground plane, protrudes from the edge, and constructs a first loop including the edge, and a T-shaped antenna element that extends from a feeding point to a first end and a second end along the edge, the feeding point being disposed in the vicinity of the surface between the first connecting part and the second connecting part of the first loop, wherein a length of the first loop corresponds to an electric length of one wavelength in a first frequency, and corresponds to an electric length of two wavelengths in a second frequency that is a second order harmonic of the first frequency.