Antenna Device with Adjustable Second Conductor for Frequency Tuning
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Solution Overview
Problem
Existing antenna devices face challenges in adjusting operation frequencies for wireless communication, particularly when integrated into environments with metal, leading to shifts in frequency bands, requiring cumbersome adjustments of AMC reflection plate lengths, which reduces operational convenience.
Innovation Solution
The antenna device incorporates a secondary element disposed opposite to the artificial magnetic conductor, allowing for easy adjustment of operation frequency and maintaining frequency characteristics by varying the length and width of this element, along with a parasitic conductor to enhance electrostatic coupling and capacitance, thereby shifting the frequency to desired bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If an AMC reflection plate is disposed in an intermediate layer in the entire antenna device, then the antenna device can provide a compact structure, but it becomes difficult to adjust the operation frequency band when integrated into metal environments
Solution Approach 1:
The antenna device is divided into distinct functional layers: a first antenna conductor layer, an AMC reflection plate layer, and a second antenna conductor layer. This segmentation allows independent optimization and adjustment of each layer's parameters to achieve frequency tuning without changing the overall compact structure.
Solution Approach 2:
The patent introduces adjustable parameters (length and width of the second antenna conductor) that enable dynamic tuning of the operation frequency band. This allows the antenna device to adapt to different frequency requirements when integrated into metal environments, resolving the contradiction between compactness and frequency adjustability.
2Manufacturing precision
If the length of the AMC reflection plate is adjusted to fine-tune the operation frequency band, then the frequency can be matched to desired bands, but the manufacturing process becomes cumbersome and requires remaking the antenna device
Solution Approach 1:
The AMC reflection plate is designed with preliminary optimized dimensions that provide good impedance matching and resonance characteristics. This preliminary design reduces the need for post-manufacturing adjustments and remaking, while still allowing fine-tuning through the adjustable second antenna conductor.
Solution Approach 2:
Instead of changing the AMC reflection plate dimensions for frequency tuning, the patent changes the parameters (length and width) of the second antenna conductor. This approach achieves the same frequency matching precision with much simpler manufacturing, as the second antenna conductor can be adjusted without remaking the entire device.
3Ease of operation
If a second antenna conductor is disposed on the side opposite to the AMC reflection plate, then the operation frequency can be easily adjusted by varying the length and width of the second antenna conductor, but the device structure becomes more complex
Solution Approach 1:
The second antenna conductor serves multiple functions: it acts as a radiating element, provides frequency tuning capability through adjustable dimensions, and enables impedance matching. This multi-functionality achieves ease of frequency adjustment without proportionally increasing device complexity, as one component performs multiple roles.
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 enables efficient adjustment and maintenance of frequency bands, improving antenna performance by increasing gain and impedance matching, while reducing the antenna's size and maintaining stability even when integrated into metal-framed environments.
Implementation Method 1
an artificial magnetic conductor sandwiched between the first antenna conductor and the ground conductor
Implementation Method 2
maintains frequency characteristics of an operation frequency band
Implementation Method 3
a parasitic conductor to enhance electrostatic coupling and capacitance, thereby shifting the frequency to desired bands
Data Source
AI summary
An antenna device includes a first antenna conductor, a ground conductor, an artificial magnetic conductor sandwiched between the first antenna conductor and the ground conductor, and disposed separately from the first antenna conductor and the ground conductor, and a second antenna conductor disposed on a side opposite to the artificial magnetic conductor across the first antenna conductor and disposed furthest away from the ground conductor.