Dual-Driven Groundless Antenna Design for Low-Loss Transmission
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Solution Overview
Problem
Conventional antennas face inefficiencies due to ground connections, requiring large sizes and losing up to 90% of input power, and are limited by the need for ground radials, which restricts their application and performance.
Innovation Solution
The development of short dual-driven groundless antennas with elongated tubular outer and inner electrical conductors, where the inner conductor is longitudinally disposed within the outer conductor without contact, allowing for dual-driven operation without grounding, and featuring an axial gap to maximize current flow and minimize losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional antennas use ground connections, then they can transmit and receive radio waves, but they lose up to 90% of input power and require large sizes
Solution Approach 1:
The patent removes the ground connection requirement from conventional antenna designs. The groundless antenna extracts the essential function of radio wave transmission and reception while eliminating the harmful ground connection that causes power loss and size constraints. This is achieved through a dual-driven configuration where both ends of the antenna are driven by signal sources without needing a ground reference.
Solution Approach 2:
Instead of using a single-driven antenna with ground connection (conventional approach), the patent inverts the approach by using dual-driven operation without ground. The traditional single-ended configuration is transformed into a balanced differential configuration where both ends are actively driven, reversing the conventional grounding paradigm.
2Adaptability or versatility
If conventional antennas require ground radials, then they can operate, but their application and performance are restricted
Solution Approach 1:
The patent extracts and removes the ground radial structure from the antenna system. By eliminating the requirement for ground radials, the antenna becomes adaptable to environments where ground is unavailable or impractical, such as handheld devices, vehicles, or portable installations, while maintaining full transmission and reception functionality.
3Volume of moving object
If antennas are made compact, then they save space, but conventional designs lose significant power and require grounding
Solution Approach 1:
The patent inverts the conventional short antenna design by using dual-driven operation without ground. This inversion allows compact dimensions to be maintained while avoiding the severe power losses that plague conventional short grounded antennas. The balanced differential configuration enables efficient current distribution even in electrically short structures.
Solution Approach 2:
The patent changes the operational parameters from single-ended grounded operation to dual-driven differential operation. This parameter change fundamentally alters the current distribution and impedance characteristics, enabling compact sizes without the quadratic power loss relationship that constrains conventional short antennas.
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
These antennas provide high current flow over their entire length with low loss, are compact, and do not require grounding, enabling efficient transmission and reception of radio waves in various applications, including handheld devices and environments without a ground.
Implementation Method 1
A radio wave is a type of electromagnetic radiation (e.g., a type of electromagnetic wave/energy) that travels through free space
Implementation Method 2
The inner electrical conductor is longitudinally disposed within the interior of the tubular outer electrical conductor such that an axial gap exists between the inner surface of the tubular outer electrical conductor and a radially outer surface of the inner electrical conductor
Data Source
AI summary
Short, dual-driven groundless antennas are provided. One of the antennas includes a tubular outer conductor, a tubular inner conductor, and an electrical connector that electrically connects an opposite end of the outer conductor to the exterior of the inner conductor. The inner conductor is longitudinally disposed within the hollow axial interior of the outer conductor such that an axial gap exists between the radially inner surface of the outer conductor and the radially outer surface of the inner conductor, and the inner conductor runs at least to the opposite end of the outer conductor. Electrical signals are connected to a driven end of both the outer and inner conductors, where these signals supply power to/from the antenna whenever it is used as a transmitter/receiver, and neither of these signals needs to be connected to an electrical ground.