Modular Aperture Antenna With Shared Shorting Post for Balun-Free Bandwidth
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Solution Overview
Problem
Existing tightly coupled dipole array (TCDAs) antennas face challenges with common mode resonance and signal distortion due to baluns, which affect bandwidth and efficiency, and there is a need for scalable designs that balance bandwidth and compatibility without incurring increased losses.
Innovation Solution
A modular aperture antenna design that uses a shared shorting post between antenna elements to mitigate common mode resonance, allowing for differential signal feeding without baluns, and is fabricated using additive manufacturing techniques for mechanical stability and scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If baluns are used in tightly coupled dipole array antennas, then signal feeding is achieved, but common mode resonance and signal distortion occur, reducing bandwidth and efficiency
Solution Approach 1:
The patent removes the balun component entirely from the antenna system. Instead of using a balun to feed the dipole elements, the invention employs a shared shorting post structure that directly connects adjacent dipole elements to the ground plane, enabling feed network integration without the harmful effects of baluns on bandwidth and efficiency
Solution Approach 2:
The patent merges the grounding function and the feeding function into a single integrated structure. The shared shorting post simultaneously serves as a ground connection for adjacent dipole elements and as part of the feed network, eliminating the need for separate balun components and achieving both signal feeding and common mode resonance mitigation
2Adaptability or versatility
If traditional antenna designs are used, then compatibility is maintained, but scalability is limited and losses increase
Solution Approach 1:
The shared shorting post structure serves multiple functions simultaneously: it provides grounding for adjacent dipole elements, acts as part of the feed network, and mitigates common mode resonance. This multi-functional design enables the antenna system to be scaled by simply adding more dipole elements without increasing losses or requiring additional complex components
Solution Approach 2:
The antenna array is segmented into modular dipole elements that can be independently added or removed. Each dipole element shares shorting posts with adjacent elements, creating a scalable configuration where the same basic building block can be replicated to achieve different array sizes without increasing signal loss
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 achieves a bandwidth ratio of up to 10:1 without using baluns, reducing signal distortion and maintaining efficiency across a wide frequency range, while allowing for scalable and compatible antenna arrays.
Implementation Method 1
Existing tightly coupled dipole array (TCDAs) antennas face challenges with common mode resonance and signal distortion
Implementation Method 2
fabricated using additive manufacturing techniques for mechanical stability and scalability
Data Source
AI summary
An antenna assembly includes an antenna feed, a ground plane, a first antenna element, a second antenna element, and a shorting post that is shared between the first and second antenna elements. The first antenna element includes a first conductive dipole arm in planar alignment with a surface of the ground plane and a second conductive dipole arm in planar alignment with the surface of the ground plane and adjacent to the first conductive dipole arm. The second antenna element includes a third conductive dipole arm in planar alignment with the surface of the ground plane and adjacent to the second conductive dipole arm, and a fourth conductive dipole arm in planar alignment with the surface of the ground plane and adjacent to the third conductive dipole arm. The shorting post is in electrical communication with the ground plane, the second conductive dipole arm and the third conductive dipole arm.