RF Circuit Port Identification Using Distinct Delay Paths
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Solution Overview
Problem
In wireless telecommunications network equipment, it is challenging to verify the proper connection of RF signals between multiple ports of a radio and a passive multi-port RF circuit, such as a base station antenna, as the radio lacks a mechanism to identify which ports are connected.
Innovation Solution
The RF circuit includes a secondary port connected to primary ports via different-length RF transmission paths, providing distinct responses to RF signals received through each primary port, allowing for the identification of correct connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual connection verification is performed, then connection accuracy may be improved, but installation time and complexity increase
Solution Approach 1:
The system enables self-verification by having the radio transmit test signals through the connected cables to the RF circuit, which processes them through known transmission paths with unique characteristics. The system automatically compares received signals against expected responses to identify correct port mappings without requiring manual verification procedures
Solution Approach 2:
The patent utilizes different transmission path characteristics (length, impedance, delay) as distinguishing parameters for each port connection. By measuring signal properties such as time delay, phase shift, or impedance values that vary based on path characteristics, the system can automatically identify which radio port connects to which RF circuit port
2Reliability
If no connection identification mechanism is used, then device complexity is reduced, but misconnection errors increase
Solution Approach 1:
The patent introduces an intermediary calibration circuit board containing known RF transmission paths with unique characteristics between the radio and RF circuit. This intermediary component enables automatic connection identification by providing measurable differences in signal transmission through each path, allowing the system to determine correct port mappings without adding complex active components to the main RF signal path
Solution Approach 2:
The system performs preliminary connection verification during the installation or initialization phase by transmitting test signals through all possible port combinations and measuring responses before normal operation begins. This preliminary action identifies and stores the correct port mapping information, ensuring reliable connections without affecting subsequent operational performance
Data Source
AI summary
Methods of identifying electrical connections between primary ports of a radio frequency circuit and primary ports of a radio are provided. A method of identifying the electrical connections includes receiving a radio frequency signal via each of the primary ports of the radio frequency circuit. Moreover, the method includes providing, by the radio frequency circuit, different responses to the radio frequency signal that is received via the primary ports, respectively, of the radio frequency circuit. In some embodiments, the different responses are different frequency responses or different delay responses. Related radio frequency circuits are also provided.