Ultra-Wideband Monopole Antenna Layout for Low-Profile 5G Coverage
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Solution Overview
Problem
Designing an ultra-wideband monopole antenna for indoor 5G fixed wireless and small cell applications poses a challenge due to the need for a very wide operating frequency bandwidth, making it difficult to achieve a low and slim profile with flat and linear gain figures and high radiation efficiency.
Innovation Solution
The solution involves a unique arrangement of two quarter wavelength conductors with flat portions and curved wings, where the flat portions are made from FR4 PCB and the curved wings from stainless steel, arranged concentrically with a coaxial connector, to achieve a bandwidth of 600-6000 MHz with a low and slim profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional monopole antenna design is used to cover the full 5G band (600-6000 MHz), then the operating frequency bandwidth can be achieved, but the antenna profile becomes large and bulky, failing to meet the low and slim profile requirement
Solution Approach 1:
The monopole antenna is divided into two separate quarter-wavelength conductors, each optimized for different frequency ranges. The first conductor (600-960 MHz) and second conductor (1710-6000 MHz) are arranged perpendicular to each other, allowing each segment to function independently while collectively covering the full 5G band, thus achieving wide bandwidth without increasing overall profile height.
Solution Approach 2:
The patent transitions from a conventional single vertical monopole to a two-dimensional perpendicular arrangement of two quarter-wavelength conductors. By placing the first and second conductors at right angles to each other in the same plane, the design utilizes spatial dimensionality to achieve ultra-wideband coverage while maintaining an extremely low profile height of less than one-quarter wavelength at the lowest operating frequency.
2Length of stationary object
If the antenna profile is reduced to be extremely low and slim, then the form factor and aesthetic appearance are improved, but the gain figure becomes non-flat and radiation efficiency decreases
Solution Approach 1:
Each quarter-wavelength conductor is equipped with specifically designed curved wings having predetermined radius and curvature. The first conductor has curved wings optimized for the 600-960 MHz band, while the second conductor has curved wings optimized for the 1710-6000 MHz band. This local optimization ensures that each conductor maintains high radiation efficiency in its designated frequency range despite the overall low profile design.
Solution Approach 2:
The patent carefully controls the radius and curvature parameters of the curved wings on each conductor to optimize performance. By adjusting these geometric parameters, the antenna achieves flat gain figures and maintains radiation efficiency above 80% across the entire ultra-wideband range, overcoming the typical performance degradation associated with low-profile antenna designs.
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 design achieves a flat and linear gain figure across the ultra-wideband frequency band with high radiation efficiency and a cost-effective, aesthetically appealing form factor, maintaining more than 80% average radiation efficiency.
Implementation Method 1
Each of the first quarter wavelength conductor and the second quarter wavelength conductor is configured to transmit and/or receive an electromagnetic signal
Data Source
AI summary
An ultra-wideband monopole antenna for 5G application is disclosed comprising a first quarter wavelength conductor and a second quarter wavelength conductor, for transmitting and/or receiving electromagnetic waves. A flat portion of the first quarter wavelength conductor and a flat portion of the second quarter wavelength conductor are preferably arranged and located perpendicular and intersecting to each other. Two curved wings of the first quarter wavelength conductor and two curved wings of the second quarter wavelength conductor are preferably arranged and located concentrically and having a same center. The first and second quarter wavelength conductors are joined to deliver ultra wideband frequency in the range of 600-960 MHz and 1710-6000 MHz.