Dielectric Reflector Antenna for High-Frequency Gain
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Solution Overview
Problem
High gain antennas for high frequencies face challenges with increased losses and undesired lobe shapes, and are difficult to manufacture due to smaller size and tighter tolerances.
Innovation Solution
A reflector antenna arrangement comprising a common dielectric body with attached reflective metal surfaces and a signal feeding arrangement, where the metal surfaces are fixed in relation to each other with a certain distance, allowing electromagnetic radiation to propagate through the dielectric body, facilitating low-loss and desired lobe shapes with simplified manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the carrier frequency is increased to achieve higher antenna gain, then the main lobe becomes narrower and antenna gain increases, but the antenna size becomes smaller and manufacturing precision requirements increase
Solution Approach 1:
The patent merges the feed structure and reflector structure into a single integrated antenna unit. The feed is positioned at the focal point of the parabolic reflector, combining the signal transmission function and the signal reflection function into one unified structure. This integration simplifies manufacturing by reducing the number of separate components that need to be precisely assembled, while maintaining the narrow beam width and high gain characteristics achieved through the parabolic geometry.
Solution Approach 2:
The patent employs a parabolic (curved) reflector surface instead of a flat surface. This curvature is essential for focusing electromagnetic waves into a narrow main lobe, achieving high directional gain. The parabolic shape naturally focuses parallel incoming waves to a single focal point, or conversely, focuses waves from the focal point into a parallel beam, thereby achieving the desired narrow beam width and high antenna gain without requiring excessively small dimensions.
2Ease of manufacture
If the antenna size is decreased to reduce manufacturing complexity, then the antenna becomes easier to manufacture, but the manufacturing precision requirements increase due to tighter tolerances
Solution Approach 1:
The patent merges the feed structure and reflector structure into a single integrated antenna unit. The feed is positioned at the focal point of the parabolic reflector, combining the signal transmission function and the signal reflection function into one unified structure. This integration simplifies manufacturing by reducing the number of separate components that need to be precisely assembled, while maintaining the narrow beam width and high gain characteristics achieved through the parabolic geometry.
3Power
If high gain antennas are used for high frequency applications, then the antenna gain increases, but losses increase and lobe shape control becomes difficult
Solution Approach 1:
The patent employs a parabolic (curved) reflector surface instead of a flat surface. This curvature is essential for focusing electromagnetic waves into a narrow main lobe, achieving high directional gain. The parabolic shape naturally focuses parallel incoming waves to a single focal point, or conversely, focuses waves from the focal point into a parallel beam, thereby achieving the desired narrow beam width and high antenna gain without requiring excessively small dimensions.
Solution Approach 2:
The patent optimizes key geometric parameters of the parabolic reflector, including the focal length, diameter-to-depth ratio, and feed position. By carefully selecting these parameters, the antenna achieves high gain while controlling side lobe levels and minimizing energy losses. The focal length is specifically optimized to ensure efficient coupling between the feed and the reflector, reducing mismatch losses and improving overall antenna efficiency.
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 approach results in a high-performance, easily manufactured antenna with low costs and precise manufacturing, achieving low losses and desired lobe shapes, particularly suitable for high frequencies.
Implementation Method 1
the first reflective metal surface and the second reflective metal surface are adapted for transfer of electromagnetic radiation between them by means of reflection
Data Source
AI summary
The present disclosure relates to a reflector antenna arrangement comprising at least a first reflective metal surface and a signal feeding arrangement transition that is adapted to receive a signal feeding arrangement that in turn is adapted to transmit and/or receive electromagnetic radiation via the first reflective metal surface. The reflector antenna arrangement further comprises a common dielectric body comprising at least one dielectric material, to which common dielectric body the first reflective metal surface is attached in a fixed relation to the signal feeding arrangement transition with a certain distance between them such that said transmitted and/or received electromagnetic radiation at least partly is arranged to propagate through at least a part of the common dielectric body.