Crossed Dipole Antenna With Beamforming Ring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dipole antennas struggle to achieve a stable beamwidth of 65 degrees over the 1710-2690 MHz frequency range without increasing the number of elements, size, or depth, while maintaining cost-effectiveness and avoiding beamwidth variations and passive intermodulation issues.
Innovation Solution
A crossed dipole antenna with a ring-shaped beamforming structure constructed from conductive material encircling the antenna, which is optimized in distance and shape to stabilize the beamwidth, increase gain, and reduce grating lobe and cross-pole isolation, allowing for adjustable azimuth and elevation beamwidths without modifying the dipole antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If multiple parasitic elements are used in parallel with a reflector to achieve narrower beamwidth, then beamwidth is reduced, but the depth of the antenna increases
Solution Approach 1:
The patent transitions from a planar configuration with multiple parasitic elements arranged in parallel to a three-dimensional configuration using a single dipole antenna with a ring-shaped beamforming structure that encircles the antenna. This dimensional change allows the beamforming function to be achieved without increasing the antenna depth, as the ring structure utilizes the spatial dimension around the dipole rather than extending elements parallel to each other.
2Shape
If the number of antenna elements is increased to achieve narrower beamwidth, then beamwidth is reduced, but the cost of the antenna increases
Solution Approach 1:
The patent merges the beamforming function into a single dipole antenna by adding a ring-shaped beamforming structure that encircles the dipole. This combines multiple functions (radiation and beamforming) into one integrated structure, eliminating the need for multiple separate parasitic elements and reducing overall device complexity while achieving the desired narrow beamwidth.
3Shape
If the height of the dipole antenna is reduced and a large reflector is used to achieve narrower beamwidth, then beamwidth is reduced, but the overall size of the antenna increases
Solution Approach 1:
Instead of increasing the reflector size in the planar dimension to achieve narrower beamwidth, the patent uses a ring-shaped beamforming structure that utilizes the third dimension (encircling the dipole). This allows beamwidth control without increasing the overall antenna footprint area, as the beamforming is achieved through the spatial configuration of the ring around the dipole rather than through a larger reflector surface.
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 ring-shaped beamforming structure achieves a stable 65-degree azimuth beamwidth over 1710-2690 MHz with reduced grating lobe and cross-polarity isolation, increased antenna gain, and compact design, while allowing for reconfigurable patterns and improved antenna parameters like directivity and cross-polarity discrimination.
Implementation Method 1
A crossed dipole antenna element (20, 30) has a ring (40) encircling the antenna. The ring, constructed of a conductive material, is not touching the arms of the dipole antenna
Data Source
AI summary
Systems, methods, and devices relating to antennas. A crossed dipole antenna element has a ring encircling the antenna. The ring, constructed of a conductive material, is not touching the arms of the dipole antenna and the distance between the ring and the arms of the antenna can be optimized. The antenna element assembly can be used in one or two dimensional antenna arrays.