HF-SIMANT Antenna Merging Dipole and Loop Modes
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Solution Overview
Problem
Existing High Frequency (HF) communication and direction-finding systems face challenges in achieving simultaneous dipole and loop mode performance, low noise, and wideband operation from 3 to 30 MHz, with issues including installation difficulty, balun design complexity, and poor antenna performance.
Innovation Solution
The antenna design comprises a conductive loop with two baluns, a 180° hybrid coupler, and low noise amplifiers (LNAs), allowing for simultaneous reception of wideband signals in real time from 3 to 30 MHz, and can operate in both dipole and loop modes, maintaining low noise levels and compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antenna structures are used to achieve simultaneous dipole and loop mode performance, then antenna performance is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The patent combines dipole and loop mode functionalities into a single integrated antenna structure. The antenna element is configured to support both operating modes simultaneously through a unified design, eliminating the need for separate antenna structures and reducing installation complexity while maintaining dual-mode performance
Solution Approach 2:
The antenna is designed with multi-functionality to operate in both dipole and loop modes using the same physical structure. This universal design allows the antenna to perform multiple functions (dipole reception and loop reception) without requiring additional components or complex installation procedures
2Adaptability or versatility
If wideband operation from 3 to 30 MHz is achieved, then frequency coverage is improved, but antenna electrical size increases
Solution Approach 1:
The patent employs parameter changes in the antenna design, specifically using a compact physical structure with optimized electrical characteristics that enable wideband operation from 3 to 30 MHz. The antenna maintains a small electrical size through careful parameter selection and configuration, achieving broad frequency coverage without proportional increase in physical dimensions
3Reliability
If low noise performance is achieved, then signal reception quality is improved, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the low noise amplifier (LNA) and hybrid coupler into an integrated configuration where these components work together in a unified signal path. This integration reduces the number of discrete components and interconnections while maintaining low noise performance through optimized component placement and signal flow management
Data Source
AI summary
An antenna comprising: a loop made of conductive material; two baluns connected to, and intersecting, opposing sides of the loop, wherein each balun has an output; a 180° hybrid coupler having two input ports, a sum output port, and a delta output port, wherein the two input ports are connected to the outputs of the baluns; a first low noise amplifier (LNA) connected to the sum output port; a second LNA connected to the delta output port; first and second receivers connected to the first and second LNAs respectively; and wherein the antenna is electrically small and is designed to simultaneously receive wideband signals in real time from 3 to 30 MHz.