Triple Crossed Loop Antenna Wideband Omnidirectional Design
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Solution Overview
Problem
Existing omni-directional antennas operate over small bandwidths and have limited efficiency, typically achieving only 50% radiation efficiency, which is inadequate for modern communication systems requiring broader frequency coverage.
Innovation Solution
A triple crossed loop elliptical antenna design that separates loops by specific angles to provide an omni-directional radiation pattern over a wideband frequency range, with each loop made of conducting materials like copper and aluminum, optimized for low return loss and high radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional omni-directional antenna designs are used, then the antenna structure is simple, but the bandwidth is limited to small ranges (typically 10% of the lowest operating frequency) and radiation efficiency is only about 50%
Solution Approach 1:
The antenna is divided into multiple loops (typically three loops) arranged in a crossed configuration. Each loop contributes to the overall radiation pattern, and by segmenting the antenna into these discrete loops separated by specific angles (e.g., 120 degrees), the design achieves omnidirectional radiation over wide bandwidth while maintaining a relatively simple segmented structure
Solution Approach 2:
The patent transitions from conventional planar or single-dimensional antenna designs to a three-dimensional crossed loop configuration. By arranging loops in multiple spatial dimensions and separating them by specific angles in 3D space, the antenna achieves omnidirectional radiation patterns and wide bandwidth that cannot be obtained with simpler two-dimensional designs
2Loss of energy
If conventional omni-directional antennas are used, then the antenna design is straightforward, but radiation efficiency is limited to about 50%
Solution Approach 1:
The patent optimizes specific parameters including the separation angles between loops (e.g., 120 degrees), the dimensions of each loop, and the conducting material properties. By carefully adjusting these parameters, the antenna achieves radiation efficiency of at least 90%, significantly improving energy utilization compared to conventional 50% efficient designs
Solution Approach 2:
The antenna employs conducting materials such as copper and aluminum for the loop structures. By selecting and combining appropriate conducting materials with optimized geometric configurations, the design achieves high radiation efficiency while managing electrical losses and improving overall energy radiation performance
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 achieves an omni-directional radiation pattern with minimal gain variation across a wide frequency band, exceeding 200% of the lowest frequency, and maintains radiation efficiency of at least 90%, significantly surpassing the efficiency of conventional antennas.
Implementation Method 1
While transmitting, the antenna may generate a radiating electromagnetic field in response to an applied alternating voltage or current
Implementation Method 2
While receiving, the antenna placed in an electromagnetic field may allow the electromagnetic field to induce an alternating current in the antenna and a voltage between the terminals of the antenna
Data Source
AI summary
An antenna may comprise a first loop, a second loop, and a third loop, which are arranged to have a common intersection point on an axis that is common to the first, second, and the third loop. The first, second, and the third loop are mutually separated by an angle of separation to form a triple crossed loop antenna. The triple crossed loop antenna may provide omni-directional radiation pattern over wide band of frequency.