Compact UWB Microstrip Resonating Antenna Design
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Solution Overview
Problem
Existing ultra wideband (UWB) antennas are often large, limited in capacity, and require a Balun component, making them costly and difficult to achieve balanced feeding techniques.
Innovation Solution
A compact UWB microstrip resonating antenna design featuring multiple substrates with microstrip resonating lines of varying lengths, impedance matching circuits, and balanced feeding techniques such as aperture coupling, direct coupling, and probe feeding, which eliminates the need for a Balun component by maximizing electromagnetic energy coupling and extending the operational bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional UWB antenna designs are used, then the antenna can achieve wide bandwidth operation, but the antenna size becomes large and requires additional Balun components
Solution Approach 1:
The antenna is divided into multiple substrates (first substrate, second substrate, third substrate) with distinct functions. The first substrate contains the feeding network, the second substrate contains the resonating elements, and the third substrate provides ground plane. This segmentation allows each layer to be optimized independently, achieving compact size while maintaining wide bandwidth operation through coordinated design of all substrates.
Solution Approach 2:
The patent transitions from a planar single-substrate design to a three-dimensional multi-substrate stacked configuration. By utilizing the vertical dimension and stacking multiple substrates with different functions, the design achieves compact footprint while maintaining the electromagnetic path lengths necessary for wide bandwidth operation, eliminating the need for additional Balun components.
2Adaptability or versatility
If traditional UWB antenna designs are used, then the antenna can operate at wide bandwidth, but the system cost increases due to required Balun components
Solution Approach 1:
The patent merges the Balun functionality directly into the multi-substrate antenna structure itself. The feeding network on the first substrate, coupled with the resonating elements on the second substrate and ground plane on the third substrate, integrates the balanced-to-unbalanced transformation function that would traditionally require a separate Balun component, thereby reducing system complexity and cost while maintaining wide bandwidth operation.
Solution Approach 2:
The multi-substrate structure serves multiple functions simultaneously: it provides the radiating elements for wide bandwidth operation, implements the feeding network, provides ground reference, and performs the Balun transformation. This multi-functionality eliminates the need for separate dedicated components, reducing overall system complexity and cost.
3Adaptability or versatility
If traditional UWB antenna designs are used, then the antenna can achieve wide bandwidth, but balanced feeding techniques become difficult to implement
Solution Approach 1:
The feeding system is segmented across multiple substrates with dedicated functions. The first substrate contains the unbalanced feeding lines, the coupling aperture provides the transformation interface, and the second substrate contains the balanced resonating elements. This segmentation makes the balanced feeding implementation straightforward by clearly separating the unbalanced-to-balanced transformation function from the radiating function.
Solution Approach 2:
The coupling aperture in the ground plane serves as an intermediary element that facilitates the balanced feeding implementation. It provides the coupling interface between the unbalanced feeding network on the first substrate and the balanced resonating elements on the second substrate, making the balanced feeding technique easy to implement through a well-defined coupling mechanism.
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 results in a compact, efficient UWB antenna that covers the 3.1-10.6 GHz bandwidth with reduced size and cost, while ensuring balanced feeding and improved transmission capabilities.
Implementation Method 1
Each antenna substrate includes a plurality of microstrip resonating lines
Implementation Method 2
two or more antenna substrates communicatively coupled with the signal feed
Data Source
AI summary
An Ultra Wide Band (UWB) antenna includes a base substrate that includes a signal feed and two or more antenna substrates communicatively coupled with the signal feed. Each antenna substrate includes a plurality of microstrip resonating lines.