Loop Gap Resonator Enclosure for Uniform Atomic Sensor Fields
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Solution Overview
Problem
Miniature atomic sensors, such as atomic clocks, face challenges in maintaining accurate timing due to small spatial gradients in microwave fields, which can lead to significant clock errors, especially in GNSS-denied environments.
Innovation Solution
A device comprising a housing coupled to a loop gap resonator (LGR) with mounting brackets that create a separation region, ensuring an electromagnetic field of uniform phase and amplitude within the LGR's inner cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the LGR is coupled in an external housing designed to insulate the LGR, then the isolation of electromagnetic resonance modes is improved, but the housing introduces perturbations to the resonance modes and destabilizes the LGR
Solution Approach 1:
Mounting brackets are introduced as intermediary elements between the LGR and the housing. These brackets create a separation region that fills with dielectric material, serving as a mediator that provides mechanical support and electrical insulation while minimizing direct electromagnetic coupling between the LGR and the housing, thus avoiding perturbations to the resonance modes
Solution Approach 2:
The harmful direct contact between the LGR and the housing is extracted by introducing a separation region. This separation region is filled with dielectric material that provides the necessary insulation while preventing the housing from directly perturbing the electromagnetic resonance modes of the LGR
2Volume of stationary object
If the LGR is placed close to the housing walls to maximize space utilization, then the device miniaturization is improved, but spatial gradients in the electromagnetic field increase causing clock errors
Solution Approach 1:
The separation region between the LGR and the housing walls is specifically designed with appropriate dimensions and filled with dielectric material to create local electromagnetic conditions that ensure uniform phase and amplitude of the resonance modes in the LGR inner cavity, while maintaining overall compact device dimensions
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
The solution effectively isolates electromagnetic resonance modes, enhancing the accuracy of atomic sensing measurements by maintaining a uniform electromagnetic field, thereby reducing clock errors.
Implementation Method 1
the LGR is configured to support an electromagnetic field in the inner cavity
Implementation Method 2
exciting a desired electromagnetic mode at a resonance frequency in the inner cavity of the LGR
Implementation Method 3
there exists a separation region between an outer edge of the LGR and an inner edge of the housing... an electromagnetic field of substantially uniform phase and amplitude is provided in the inner cavity of the LGR
Data Source
AI summary
A housing for coupling to a loop gap resonator (LGR) includes an interior cavity in which the LGR is disposed therein. The LGR is attached to the housing by at least one mounting bracket, which fixes the LGR in the interior cavity. Additionally, the interior cavity includes a separation region between the cavity walls and the LGR. The widths of each mounting bracket and the width of the separation region is determined in order to support a uniform electromagnetic field inside the LGR.