UWB Antenna Stub for Filtering Predetermined Frequency Band
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Solution Overview
Problem
Conventional ultra wideband antennas require separate filter units to remove specific frequency bands, leading to increased system size, power loss, and complexity due to the presence of multiple components.
Innovation Solution
An ultra wideband antenna design incorporating a radiator with a λ/4 stub that intercepts predetermined frequency band signals, integrating the filter function within the antenna structure to reduce size and improve power loss and noise characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate filter unit is used to remove predetermined frequency band signals, then the filtering function is achieved, but the system size increases
Solution Approach 1:
The patent combines the filter function with the ultra wideband antenna by inserting a stub having a length of λ/4 into the radiator. This integration merges the filtering capability into the antenna structure itself, eliminating the need for a separate filter unit and thereby reducing the overall system size while maintaining the frequency band filtering function.
Solution Approach 2:
The radiator in the patent is designed to perform multiple functions: it serves as both the radiating element and the filtering component. By incorporating the stub structure into the radiator, the same component achieves both signal radiation and frequency band filtering, demonstrating multi-functionality that reduces system complexity and size.
2Reliability
If multiple constituent elements are used in the receiving system, then the filtering function is achieved, but the power loss increases
Solution Approach 1:
By merging the filter function into the antenna radiator through the stub structure, the patent reduces the number of separate constituent elements in the receiving system. This integration minimizes the interfaces and connections between components, thereby reducing power loss that would otherwise occur at multiple component interfaces.
3Reliability
If multiple constituent elements are used in the receiving system, then the filtering function is achieved, but the system construction becomes complicated
Solution Approach 1:
The patent simplifies system construction by combining the filter function with the antenna radiator. This merger reduces the number of separate components that need to be designed, manufactured, and assembled, thereby simplifying the overall system construction while maintaining the necessary filtering capability.
Solution Approach 2:
The radiator is designed as a multi-functional component that performs both radiation and filtering functions. This universality reduces the total number of components in the system, simplifying construction and reducing the complexity of system integration and assembly.
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 integrated filter function within the antenna reduces system complexity, minimizes power loss, and enhances noise characteristics, allowing for a compact ultra wideband receiving system with improved performance.
Implementation Method 1
a stub, disposed on the radiator in a direction which is parallel to a direction of an electric field of the electromagnetic wave which is radiated, which intercepts transmission or reception of a predetermined frequency band signal
Data Source
AI summary
An ultra wideband antenna is provided that filters a predetermined frequency signal. The ultra wideband antenna includes a power feeding part that receives a supply of an external electromagnetic energy; a radiator excited by the electromagnetic energy fed through the power feeding part and radiating an electromagnetic wave; and a stub, provided on the radiator in a direction parallel to a direction of an electric field formed by the electromagnetic wave, that intercepts transmission/reception of a predetermined frequency band signal. The length of the stub may be ¼ of a wavelength of the intermediate frequency of the predetermined frequency band to be removed to filter the corresponding frequency band signal. The ultra wideband antenna simplifies the construction of an ultra wideband receiving system with the power loss and noise characteristics of the system improved.