Omnidirectional Interrogator-Transponder for Drone Collision Avoidance
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Solution Overview
Problem
Current collision avoidance systems for aircraft, particularly drones, face challenges due to the size, weight, and cost constraints imposed by the use of directional antennas and separate interrogators and transponders, which also lead to interference issues and reliance on unreliable ADS-B signals.
Innovation Solution
A combined interrogator and transponder system with an omnidirectional antenna that dynamically interleaves transmissions and responses, using a communication circuit with multiple receive and transmit chains, PIN-diode switching, and omnidirectional antennas to reduce size and weight while ensuring regulatory compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If directional antennas are used to perform directional measurements for localizing aircraft, then measurement precision is improved, but device complexity and size increase
Solution Approach 1:
The patent combines multiple antenna functions (omnidirectional reception and directional measurement) into a single integrated system. The directional antenna is integrated with the transponder unit, allowing both collision avoidance communication and localization measurements to be performed by a unified device rather than separate systems.
Solution Approach 2:
The transponder unit is designed to perform multiple functions: it responds to interrogator signals for collision avoidance (TCAS/ACAS operations) and simultaneously performs directional measurements for localizing other aircraft. This multi-functional design eliminates the need for separate dedicated localization antennas while achieving both objectives.
2Reliability
If separate interrogators and transponders are used to ensure reliable communication, then reliability is improved, but device complexity and weight increase
Solution Approach 1:
The patent integrates the interrogator and transponder functions into a single combined unit. The transponder unit includes both the transponder circuitry for responding to interrogations and the directional measurement capabilities, creating a unified system that reduces complexity while maintaining communication reliability through coordinated operation of integrated components.
3Reliability
If tight transmission masks are implemented to ensure aviation compliance, then regulatory compliance is improved, but device complexity increases
Solution Approach 1:
The system uses periodic transmission patterns with controlled duty cycles to achieve compliance with aviation transmission masks. By regulating the timing and duration of transmissions rather than requiring complex continuous filtering, the system meets regulatory requirements while avoiding overly complex transmission control circuitry.
Data Source
AI summary
An electronic device is described. This electronic device may include a communication circuit (such as an integrated circuit) that combines an interrogator and a transponder. Notably, the communication circuit may dynamically and temporally interleave an interrogator or the transponder transmission with a transponder response to a second interrogator or the second transponder transmission associated with a second electronic device. Moreover, the electronic device may include or may be selectively electrically coupled to at least an omnidirectional antenna that is used for bidirectional communication, such as: transmitting the interrogator or the transponder transmission (or message), receiving the second interrogator or the second transponder transmission (or message), and/or transmitting the transponder response to the second interrogator or the second transponder transmission.