Ultra-Wideband Antenna Feed Structure for Wider Bandwidth
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Solution Overview
Problem
Traditional loop antennas exhibit poor standing wave performance at certain frequency ranges, limiting their ability to widen the working frequency band.
Innovation Solution
An ultra-wideband antenna design featuring a dielectric substrate with a main radiation unit and a feed unit, including a microstrip line feed unit and a grounding plate, where at least a part of the feed unit expands from a preset location to the terminal end of the microstrip line feed unit or the tail part of the grounding plate, configured to improve standing wave ratio and radiation pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional loop antenna is used, then the structure is simple, but the standing wave performance is poor at certain frequency ranges and the working frequency band cannot be widened
Solution Approach 1:
The antenna is divided into distinct functional segments: a feed unit with microstrip line and grounding plate, and a main radiation unit with specific geometric shape. This segmentation allows each part to be optimized independently for its function while working together to achieve wideband performance through controlled impedance transitions and standing wave patterns.
Solution Approach 2:
The grounding plate extends in multiple dimensions with specific length and width proportions, creating a three-dimensional electromagnetic structure that resonates across multiple frequency modes. This dimensional approach enables the antenna to achieve wideband operation by utilizing both fundamental and higher-order resonant modes simultaneously.
2Reliability
If the feed unit is expanded to improve standing wave ratio and radiation pattern, then the working bandwidth increases, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The microstrip line feed unit and grounding plate are merged into a single integrated feed unit structure that is co-designed and co-manufactured as one component. This merging simplifies the overall device complexity by eliminating the need for separate assembly steps while maintaining the expanded dimensions needed for optimal standing wave ratio and wideband performance.
Solution Approach 2:
Specific parameter proportions are defined for the feed unit dimensions (length and width relationships) to achieve optimal performance. By establishing fixed parameter ratios rather than arbitrary dimensions, the design simplifies manufacturing while maintaining the expanded structure needed for improved standing wave characteristics and wideband operation.
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 design enhances the working bandwidth of the antenna by improving standing wave ratio and radiation pattern, allowing for a simpler and smaller grounding plate structure that is easier to manufacture.
Implementation Method 1
The main radiation unit and the microstrip line feed unit are arranged on the front surface, and the microstrip line feed unit is electrically connected to the main radiation unit. The grounding plate is arranged on the back surface.
Data Source
AI summary
An ultra-wideband antenna and a device are provided. A main radiation unit (2) and a microstrip line feed unit (3) of the ultra-wideband antenna are provided on the front surface of a dielectric substrate (1), and the microstrip line feed unit (3) is electrically connected to the main radiation unit (2). A grounding plate (4) is provided on the back surface of the dielectric substrate (1) opposite to the front surface, and at least a part of a feed unit (15) is extended from a preset location to a terminal end (6) of the microstrip line feed unit (3) or a tail part (16) of the grounding plate (4).