Tightly Coupled Dipole Array With Reactive Director for High Directivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Tightly Coupled Dipole Antenna Arrays (TCDAs) face challenges in achieving increased directivity over a narrower angle, as existing designs often prioritize broadband and wide-angle performance, which limits their ability to focus electromagnetic radiation effectively within a specific direction.
Innovation Solution
The proposed antenna system incorporates a director and a reflector with tailored reactive loads, comprising capacitive and inductive components, to control the phase of electromagnetic radiation and enhance directivity. The director and reflector are strategically positioned in front of and behind the array, respectively, to achieve focused radiation patterns by managing constructive and destructive interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Tightly Coupled Dipole Antenna Array is designed for broadband and wide-angle performance, then the bandwidth and coverage angle are improved, but the directivity and energy concentration in a specific direction deteriorate
Solution Approach 1:
The patent applies local quality by introducing a director element with specific reactive loading at a particular location in front of the antenna array. This localized modification creates a region of enhanced directivity without compromising the overall broadband and wide-angle performance of the entire antenna system. The director element with tailored reactive impedance selectively shapes the radiation pattern in specific directions while maintaining the fundamental characteristics of the TCDAs array.
2Duration of action of moving object
If the antenna array elements are closely spaced to achieve tight coupling, then the bandwidth is improved, but the mutual coupling effects increase making impedance control difficult
Solution Approach 1:
The patent introduces a director element as an intermediary component between the feed source and the radiating elements. This director element with specific reactive loading acts as a mediator that manages the mutual coupling effects between closely spaced array elements. By carefully designing the reactive impedance of the director, the patent achieves broadband performance through tight coupling while controlling the complex interaction effects that arise from close element spacing.
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
This configuration significantly increases the directivity of the antenna system, allowing for focused electromagnetic radiation along specific directions, such as the elevation or horizon, thereby improving the antenna's ability to concentrate energy in desired areas.
Implementation Method 1
control the phase of electromagnetic radiation and enhance directivity... achieve focused radiation patterns by managing constructive and destructive interference
Implementation Method 2
the reflector is configured to cause a reflection of a portion of the electromagnetic radiation, received on the reflector... toward the director
Data Source
AI summary
An antenna system including an array of conductors connected to a feed line, wherein the array is configured to (1) emit electromagnetic radiation in response to an input signal being input to the array through the feed line or (2) output an output signal to the feed line in response to electromagnetic radiation being received on the array; and a director disposed in front of the array, wherein the director has a first reactive load having a complex impedance that is tailored to increase a directivity of the antenna system by reactively loading the conductors.