Multi-Frequency Antenna with Concentric Short Circuit Paths
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Solution Overview
Problem
Existing antenna devices that operate at multiple frequencies require increased size and volume due to the need for multiple patch units on the substrate, leading to a larger overall footprint.
Innovation Solution
An antenna device with a ground plate and patch section, utilizing multiple conductive elements arranged in concentric circles to create two separate electric current paths, allowing operation at different frequencies without increasing the device's size by adjusting the radius and capacitance of the conductive elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple patch units are disposed on the substrate for each different frequency, then the antenna device can operate at multiple frequencies, but the size of the substrate and overall volume of the antenna device increases
Solution Approach 1:
The patent applies multi-functionality by enabling a single patch unit to operate at multiple frequencies through the introduction of multiple short circuit sections with different inductance values. Each short circuit section can be selectively activated to tune the antenna for different frequency bands, allowing one physical structure to perform multiple operational functions without requiring separate patch units for each frequency.
Solution Approach 2:
The patent utilizes parameter changes by varying the inductance values of different short circuit sections to achieve resonance at different frequencies. By changing the electrical parameters (inductance) of the existing patch unit through selective activation of different short circuit paths, the antenna can be tuned to operate at multiple frequency bands without altering the physical dimensions of the substrate or patch unit.
2Adaptability or versatility
If the area size of the patch section or radius of the short circuit section is adjusted to set the transmission frequency, then the desired frequency can be achieved, but the physical dimensions of the antenna device must be changed
Solution Approach 1:
The patent applies parameter changes by introducing multiple short circuit sections with different inductance values that can be selectively activated to tune the resonant frequency of the antenna. This allows frequency adjustment without physically changing the patch section area or the overall antenna dimensions, as the frequency is controlled by electrical parameter variation rather than physical dimension modification.
Solution Approach 2:
The patent segments the short circuit connection into multiple separate sections, each with different inductance characteristics. This segmentation allows independent selection of different inductance values to achieve frequency tuning, replacing the need to physically resize the entire patch section or antenna structure for frequency adjustment.
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
Enables operation at multiple frequencies using the same patch section, maintaining a compact size by utilizing separate conductive paths for each frequency, achieving efficient transmission and reception without the need for additional substrate space.
Implementation Method 1
a plurality of capacitive elements each having a preset capacitance and disposed on an electric current path from the patch section to the ground plate
Implementation Method 2
The plurality of first conductive elements may be configured to electrically connect the patch section and the ground plate. The plurality of second conductive elements may be configured to electrically connect the patch section and the ground plate
Implementation Method 3
an antenna device for receiving and transmitting a radio wave at a first frequency and a second frequency
Data Source
AI summary
An antenna device includes a ground plate, a patch section parallel to, and spaced apart from, the ground plate, a first short circuit section having a plurality of first conductive elements that electrically connect the patch section and the ground plate, and a second short circuit section having a plurality of second conductive elements electrically connected at one end to the ground plate. The plurality of first conductive elements are arranged in a circle with a first radius from a patch center point and provide a preset inductance. The plurality of second conductive elements are arranged in a circle with a second radius from the patch center point and provide a preset inductance.