Monopole Antenna Ground Plane Aperture Beam Steering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face interference issues due to the susceptibility of IEEE 802.11 networks to disruptions from other devices and environmental changes, leading to degraded data throughput and potential link disruptions, and existing antennas are costly and have a larger footprint.
Innovation Solution
A monopole antenna coupled to a metallic ground plane with apertures that can steer RF beams by selectively providing short circuits using PIN diodes, allowing for multiple frequency directionality without the need for multiple antennas, thereby reducing manufacturing costs and providing a lower profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple dipole antenna elements are used to provide beam steering RF signals, then beam steering capability is improved, but manufacturing cost increases
Solution Approach 1:
The ground plane is designed with multiple apertures that can be selectively activated to provide different beam steering functions. A single monopole antenna structure serves multiple frequency bands and directional requirements through the aperture configuration, eliminating the need for separate dipole antenna elements for each function.
Solution Approach 2:
The patent combines the ground plane and beam steering elements into a single integrated structure. The apertures in the ground plane serve dual purposes: providing structural support and enabling beam steering functionality, thereby merging multiple components into one that reduces overall system complexity and cost.
2Adaptability or versatility
If multiple dipole antenna elements are used for beam steering, then RF signal directionality is improved, but device footprint increases
Solution Approach 1:
The ground plane structure performs multiple functions simultaneously: it provides mechanical support, establishes the reference potential for the monopole antenna, and enables beam steering through its aperture configuration. This multi-functionality allows directional control without adding separate antenna elements that would increase footprint.
Solution Approach 2:
The patent transitions from using multiple discrete antenna elements in three-dimensional space to using a two-dimensional ground plane with strategically positioned apertures. This dimensional reduction allows beam steering functionality to be achieved within a planar constraint, minimizing the device footprint while maintaining directional capability.
3Ease of manufacture
If a monopole antenna with ground plane is used instead of dipole elements, then manufacturing cost is reduced, but beam steering capability is lost
Solution Approach 1:
The ground plane is designed to serve multiple purposes: it provides the reference potential for the monopole antenna, structural support, and beam steering functionality through its aperture configuration. This multi-functional design maintains beam steering capability while using a simpler, lower-cost monopole structure instead of multiple dipole elements.
Solution Approach 2:
The apertures in the ground plane act as intermediaries that enable beam steering functionality for the monopole antenna. By strategically positioning and sizing these apertures, the ground plane mediates between the simple monopole structure and the desired directional radiation patterns, allowing beam steering without complex antenna elements.
4Manufacturing precision
If aperture size and position are optimized for one RF frequency, then beam steering precision is improved, but multi-frequency adaptability is reduced
Solution Approach 1:
The ground plane is divided into multiple discrete apertures, each optimized for specific frequency ranges. By segmenting the beam steering function across multiple apertures with different sizes and positions, the system can selectively activate appropriate apertures for different operating frequencies, maintaining precision while achieving multi-frequency adaptability.
Solution Approach 2:
The system dynamically selects and activates specific aperture configurations based on the operating frequency. Through RF switches or variable impedance elements, the aperture network adapts its effective configuration to match the wavelength and directional requirements of different frequency bands, maintaining optimal beam steering precision across multiple frequencies.
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 solution effectively steers RF beams across different frequencies using a single monopole antenna with apertures, enhancing data throughput while reducing interference and maintaining a compact design, thus addressing the interference and cost issues of existing systems.
Implementation Method 1
The monopole antenna includes only a single radiating element and is coupled to a ground plane of a transmitter. The monopole radiation reflects from the ground plane to provide radiation in a dipole antenna radiation pattern.
Implementation Method 2
The apertures may have a length, width, and distance from the monopole based on the wavelength of the RF signal used to drive the monopole antenna. The aperture may be in any of several shapes and patterns, including circular, square, and other patterns about the footprint of the antenna on a circuit board.
Implementation Method 3
One or more radio frequency switches, such as PIN diodes, selectively provides a short circuit at a portion of the ground plane near the aperture. The portions of the ground plane near the aperture and at which a short circuit is generated provide for steering of the monopole radiation pattern.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A monopole antenna coupled to a metallic ground plane includes apertures used to steer a radio frequency (RF) beam of the monopole. The apertures may have a length, width, and distance from the monopole based on the wavelength of the RF signal used to drive the monopole antenna. The aperture may be coupled to one or more selective devices, such as PIN diodes, which may short portions of a metallic ground plane near the aperture. The shorted portions of the metallic ground plane provide for steering of the monopole radiation pattern. A circuit board metallic ground plane may include multiple apertures to direct different RF signal frequencies from a single monopole antenna. Multiple monopole antennas may be implemented over a metallic ground plane within a wireless device, each monopole antenna with corresponding apertures.