Field-Replaceable Multi-Element Antenna for SDR Frequency Adaptation
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Solution Overview
Problem
Software defined radios (SDRs) are inflexible in the frequency domain due to fixed hardware front-end designs, making it difficult for users to adapt to different frequency operations without replacing the entire unit, which limits their ability to accommodate new use cases and frequencies.
Innovation Solution
A field replaceable multi-element antenna design that includes a configurable antenna unit and interface unit, allowing users to switch between different frequency bands and modulation formats by replacing antenna elements and RF processing hardware, enabling dynamic adaptation to new operator requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hardware front-end design including antenna and amplifier is fixed, then the SDR can operate at the initial designed frequency, but the SDR cannot adapt to different frequency operations without replacing the entire unit
Solution Approach 1:
The antenna system is divided into separate replaceable antenna elements that can be independently swapped. Each antenna element is designed for specific frequency bands, allowing users to replace only the antenna component rather than the entire SDR unit when changing frequency operations.
Solution Approach 2:
The SDR platform is designed with a universal interface and architecture that can accommodate multiple antenna types and frequency configurations. The base unit remains constant while supporting various antenna elements for different frequency bands, making the system multi-functional across frequency domains.
2Adaptability or versatility
If the front end design is fixed in the hardware, then the initial hardware design can be maintained, but the user cannot adapt to new use cases requiring frequencies outside the initial hardware design
Solution Approach 1:
Multiple antenna elements for different frequency bands are pre-configured and ready for immediate replacement. The antenna elements are designed with standardized mounting interfaces that allow for quick swapping without requiring complex reconfiguration or assembly procedures.
Solution Approach 2:
The antenna system transitions from a static, fixed configuration to a dynamic, reconfigurable system. Antenna elements can be quickly replaced to match changing operational requirements, allowing the system to adapt dynamically to new frequency bands and use cases.
3Productivity
If the antenna unit is fixed, then the hardware structure remains simple, but the SDR cannot be quickly adapted to different frequency bands and modulation formats
Solution Approach 1:
The antenna system is segmented into modular elements that can be independently selected and replaced based on the required frequency band and modulation format. This segmentation allows rapid adaptation without redesigning the entire antenna system.
Solution Approach 2:
Different antenna elements are designed with specific physical parameters (size, shape, material, geometry) optimized for different frequency bands. By changing these physical parameters through element replacement, the system adapts to different frequency operations while maintaining a simple base structure.
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 solution allows SDR systems to quickly adapt to various frequency bands and modulation formats, extending the life of existing hardware, reducing costs, and enhancing operational flexibility in civilian and military applications by enabling users to optimize antenna gain and directivity for specific applications.
Implementation Method 1
a first antenna element for receiving a first electromagnetic signal in a first frequency band
Data Source
AI summary
A configurable antenna for a software defined radio including a first antenna unit having a first antenna element for receiving a first electromagnetic signal in a first frequency band wherein the first frequency band corresponds to a first mode of operation of a software defined radio, an interface unit having a first connector to couple the first electromagnetic signal from the first antenna unit and a second connector to couple the first electromagnetic signal to the software defined radio, an enclosure configured to receive the interface unit within an internal cavity, and a retention bracket configured to mechanically retain the interface unit within the enclosure, the retention bracket having at least one hole for allowing the first connector to conductively contact the antenna unit.