Double Coil RF Component for Reduced Electromagnetic Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Miniaturization of RF components leads to increased undesired signal coupling due to reduced distances between circuit parts, impairing isolation and making further miniaturization impossible beyond a critical value, as existing solutions for reducing electromagnetic coupling are technically complex.
Innovation Solution
A double coil configuration with opposing external turn segments is integrated into RF components, specifically arranged near micro acoustic filters, to reduce electromagnetic coupling without adding additional structural space, as the coil serves both as a magnetic field generator and a protective element for sensitive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distances between circuit parts are decreased for miniaturization, then the component size is reduced, but undesired signal coupling increases and isolation deteriorates
Solution Approach 1:
A double coil structure is introduced as an intermediary element between circuit parts to reduce electromagnetic coupling. The double coil generates opposing magnetic fields that cancel each other out in the region between the coils, creating a magnetic field-free zone that acts as a shield against undesired signal coupling while allowing the circuit parts to remain in close proximity for miniaturization
Solution Approach 2:
The invention changes the electromagnetic field parameters by using two coils with opposite orientations. By adjusting the current directions and coil orientations, the magnetic field distribution is modified to create regions of reduced coupling, transforming the harmful electromagnetic interaction into a controlled field pattern that achieves both miniaturization and isolation
2Object-affected harmful factors
If additional elements are added to reduce electromagnetic coupling, then isolation improves, but device complexity increases
Solution Approach 1:
The double coil structure serves multiple functions simultaneously: it acts as an electromagnetic shield to reduce coupling between circuit parts, and it can also function as an inductive element for impedance matching or ESD protection. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved isolation
Solution Approach 2:
The invention merges the shielding function with existing inductive elements or combines two coil functions into a single double coil structure. By integrating the coupling-reduction function into an already-necessary component or merging multiple protective functions into one element, the structural complexity is minimized while still achieving the desired isolation improvement
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 double coil arrangement effectively reduces electromagnetic coupling in specific regions, allowing for further miniaturization while maintaining isolation requirements, and can be easily integrated into existing designs without increasing the component's size.
Implementation Method 1
The orientation of the two coil segments in opposite directions brings about a reduction of the electromagnetic coupling at least in a region arranged in proximity to the double coil
Data Source
AI summary
An RF component can have a reduced electromagnetic internal coupling and may be suitable for miniaturization as a result. The component includes a micro acoustic filter of ladder-type design in a housing and a double coil having a first coil segment and a second coil segment. The two coil segments are oriented in opposite directions. The two coil segments are arranged without crossover in one layer and the double coil is arranged in proximity to a parallel branch resonator of the ladder-type filter structure.