Single-Aperture Polarimetric Monopulse Feed for Stable Radar Tracking
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Solution Overview
Problem
Existing radar systems face inefficiencies in space usage and functionality by requiring multiple apertures for compact polarimetry and monopulse tracking, limiting their ability to effectively track and characterize targets over long ranges with stability and accuracy.
Innovation Solution
Integration of compact polarimetric and monopulse tracking capabilities into a single aperture antenna using a circularly polarized transmitter and multiple receivers, with a compact polarimetric monopulse waveguide antenna feed and feed network that communicates with the aperture antenna, allowing for efficient use of space and robust target tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple aperture antennas are used for compact polarimetry and monopulse tracking, then tracking accuracy and target characterization capability are improved, but space usage efficiency deteriorates
Solution Approach 1:
The patent combines compact polarimetry and monopulse tracking functions into a single aperture antenna system. The feed network integrates multiple receiver channels (vertical and horizontal polarizations) and monopulse comparison channels that share the same aperture, eliminating the need for separate apertures while maintaining both functionality and measurement precision
Solution Approach 2:
The single aperture antenna is designed to perform multiple functions simultaneously: it conducts compact polarimetry measurements (receiving both vertical and horizontal polarizations) and monopulse tracking (providing sum and difference channels for angular measurement). This multi-functional design achieves the same capabilities as multiple specialized apertures would provide, but within a single aperture structure
2Adaptability or versatility
If multiple aperture antennas are used for compact polarimetry and monopulse tracking, then target characterization capability is improved, but device complexity increases
Solution Approach 1:
The feed network merges the signal paths from multiple receiver channels into a unified processing structure. The waveguide feed system combines vertical and horizontal polarization receivers with monopulse sum and difference channels, all sharing common components such as the aperture and feed network infrastructure, thereby reducing overall device complexity while maintaining full target characterization capability
Solution Approach 2:
The antenna system is designed as a universal platform that can perform both compact polarimetry and monopulse tracking using the same hardware infrastructure. The feed network is configured to provide all necessary channels (vertical, horizontal, sum, difference) from a single aperture, eliminating the need for multiple separate antenna systems and reducing device complexity
3Device complexity
If linear polarization is used on transmit, then system simplicity is improved, but polarimetric data quality deteriorates
Solution Approach 1:
The system changes the transmit polarization parameter from linear to circular polarization. This parameter change enables the reception of both vertical and horizontal linear polarization components from the scattered signal, providing complete polarimetric data while maintaining system simplicity through the use of a single circularly polarized transmitter
Data Source
AI summary
An antenna apparatus includes an aperture antenna. The antenna apparatus also includes a compact polarimetric monopulse waveguide antenna feed configured to communicate with the aperture antenna. Optionally, the compact polarimetric monopulse waveguide antenna feed includes a monopulse antenna feed configured to communicate with the aperture antenna. The compact polarimetric monopulse waveguide antenna feed also includes a compact polarimetric monopulse feed network configured to communicate with the monopulse antenna feed.