Magnetic Coupling Loop for Self-Diagnostic RF Signal Detection

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Solution Overview

Problem

Existing beamforming systems face challenges in diagnosing and calibrating multiple channels without increasing system size and degrading performance, particularly due to the need for additional components like couplers that introduce insertion loss.

Innovation Solution

A self-diagnostic apparatus using a magnetic coupling loop to detect RF signals without interfering with the RF signal line, allowing for orthogonal and parallel configurations to maintain signal integrity and enable self-diagnosis and calibration of channel states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a coupler is inserted between the antenna and MMIC transceiver to enable self-diagnosis, then channel operation states can be diagnosed, but system size increases and insertion loss increases degrading system performance

Engineering Contradiction:

Improvechannel operation state diagnosisVSAvoidinsertion loss

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The patent introduces a magnetic coupling loop as an intermediary element that enables signal detection without direct electrical connection. The loop magnetically couples with the RF signal line to extract diagnostic signals, acting as a mediator that allows measurement while minimizing interference with the main signal path and avoiding the insertion loss problems of traditional couplers

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the traditional electrical coupling mechanism with magnetic coupling. Instead of using electrical couplers that introduce insertion loss, the system uses magnetic field interaction through a coupling loop to detect RF signals, substituting electrical connection with magnetic field-based sensing

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If a coupler is inserted between the antenna and MMIC transceiver to enable self-diagnosis, then channel operation states can be diagnosed, but system size increases

Engineering Contradiction:

Improvechannel operation state diagnosisVSAvoidsystem size

Core Design Contradiction:

Measurement precisionVSVolume of moving object

Solution Approach 1:

The magnetic coupling loop is designed to be integrated around or near the existing RF signal line, nesting the diagnostic function within the existing signal path structure. This allows the self-diagnostic capability to be embedded without adding significant external components or increasing overall system volume

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The magnetic coupling loop serves multiple functions: it enables self-diagnosis of channel operation states, provides signal detection for calibration, and maintains signal integrity in the RF path. This multi-functionality reduces the need for separate dedicated diagnostic components, thereby minimizing system size

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Measurement precision

If traditional coupler-based self-diagnostic apparatus is used, then channel diagnosis is enabled, but overall system performance is degraded

Engineering Contradiction:

Improvechannel operation state diagnosisVSAvoidsystem performance

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The magnetic coupling loop acts as a non-intrusive intermediary that detects RF signals through magnetic field coupling without directly connecting to the signal path. This maintains the integrity and reliability of the main RF signal transmission while enabling accurate channel diagnosis

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the potential harmful effect of inserting diagnostic components (which usually degrade performance) into a benefit by using magnetic coupling. The magnetic field interaction allows signal detection while actually improving system reliability by avoiding the insertion loss and performance degradation associated with traditional electrical couplers

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Enables effective diagnosis and calibration of channel states in beamforming systems without size increase or performance degradation, enhancing long-term stability and simplifying maintenance.

Implementation Method 1

a signal detection line which is magnetic-coupled with an RF signal line through a magnetic coupling loop

Methodology Applied

Scientific EffectMagnetic coupling: Electromagnetic Induction

Data Source

PatentUS20230171335A1Self-diagnostic apparatus with magnetic coupling

Publication Date: 2023.06.01 KOREA ELECTRONICS TECH INST

AI summary

There is provided a self-diagnostic apparatus of a magnetic coupling type. The self-diagnostic apparatus according to an embodiment includes: a signal detection line which is magnetic-coupled with an RF signal line through a magnetic coupling loop; and a signal detector configured to detect a size and a phase of an RF signal by detecting a current flowing through the signal detection line. Accordingly, the apparatus grasps and diagnoses respective operation states of channels by itself in a beamforming system, without increasing and a size of the system and degrading performance.