Multi-Side Antenna Feeding for Wider Bandwidth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antennas have limited bandwidth, which restricts their operational frequency range without increasing their footprint, and symmetric feeding points typically excite the same mode of operation, limiting flexibility.
Innovation Solution
The antenna is fed at a single point through N sides using a 1:N power divider, where N is an integer greater than 1, allowing each side to excite the same mode of operation with potentially different impedances, thereby increasing bandwidth without expanding the antenna's footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single feeding point is used to maintain a compact footprint, then the antenna size is reduced, but the bandwidth is limited
Solution Approach 1:
The feeding network is segmented into multiple feeding ports (N ports) that all connect to a single feeding point on the antenna element. This segmentation allows multiple independent feeding paths while maintaining a compact single-point interface with the antenna radiating element, thereby achieving both small footprint and increased bandwidth through the aggregation of multiple feeding channels.
Solution Approach 2:
The patent transitions from a single-dimensional feeding approach (one port to one point) to a multi-dimensional feeding structure where N ports converge to a single point. This dimensional transformation in the feeding network architecture enables bandwidth enhancement without increasing the antenna's spatial footprint, as the additional degrees of freedom are achieved through port multiplicity rather than spatial expansion.
2Ease of manufacture
If symmetric feeding points are used to simplify the structure, then the manufacturing is easier, but the impedance variation is limited
Solution Approach 1:
The patent applies local quality by making the feeding ports asymmetric in their electrical characteristics while maintaining symmetric physical positioning. Each feeding port can have different impedance transformations and excitation characteristics, allowing the system to achieve a wide range of impedance values and excitation modes without complicating the overall symmetric structural layout, thus preserving ease of manufacture while enhancing adaptability.
Data Source
AI summary
Antennas with increased bandwidth are provided. The bandwidth of an antenna can be increased by feeding it at a single point through N sides with a 1:N power divider, where N is an integer greater than 1. This bandwidth enhancement approach can be applied to different types of antennas, and with this design approach the bandwidth of an antenna can be increased without increasing its footprint.