Antenna Guard Conductor Suppressing Unwanted Radiation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antenna apparatuses with connected microstrip antennas face issues with directivity shifts due to unwanted radiation from connection sections, which affect the intended radiation pattern.
Innovation Solution
The antenna apparatus includes a conductor layer A, a conductor layer B, and a dielectric layer with a guard conductor in the dielectric layer surrounding the connection conductor, excluding specific connection sections to form an in-substrate waveguide, thereby suppressing unwanted radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection conductors are used to connect multiple antennas, then antenna connectivity and signal transmission are improved, but unwanted radiation from connection sections causes directivity shifts
Solution Approach 1:
A ground conductor is introduced as an intermediary element between the connection conductor and the antenna elements. This ground conductor acts as a mediator to control the electromagnetic field distribution, preventing unwanted radiation from the connection sections while maintaining proper signal transmission between antennas.
Solution Approach 2:
The patent applies different conductor configurations to different spatial locations. The ground conductor is strategically positioned only in specific areas adjacent to the connection conductor, creating local field control where needed. This localized approach suppresses unwanted radiation from connection sections without affecting the overall antenna radiation patterns.
2Manufacturing precision
If guard conductors are added to suppress unwanted radiation, then directivity control is improved, but device complexity increases
Solution Approach 1:
The patent controls unwanted radiation by adjusting the geometric parameters of the ground conductor, such as its position, length, and width. By optimizing these physical parameters, the ground conductor effectively suppresses unwanted radiation from connection sections. This parameter-based approach provides directivity control without requiring complex multi-element structures.
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 effectively reduces unwanted radiation and maintains the intended directivity of the antennas, improving signal propagation and reducing transmission loss.
Implementation Method 1
A guard conductor is provided in the dielectric layer. The guard conductor is arranged along an outer periphery of the connection conductor that excludes at least a first connection section and a second connection section of the connection conductor
Data Source
AI summary
An antenna apparatus includes a conductor layer A, a conductor layer B, and a dielectric layer that is sandwiched between the conductor layer A and the conductor layer B. In the conductor layer A, a first antenna, a second antenna, and a connection conductor are formed. The connection conductor is connected to both of the first antenna and the second antenna. In the dielectric layer, a guard conductor is provided. The guard conductor is arranged along an outer periphery of the connection conductor that excludes at least a first connection section and a second connection section of the connection conductor. The first connection section is a connection section of the connection conductor that is connected to the first antenna. The second connection section is a connection section of the connection conductor that is connected to the second antenna.