Dielectric Filter Metal Pattern Layout for Far-End Rejection
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Solution Overview
Problem
If the design of the patterns on the surface of the dielectric filter is unreasonable, it can lead to inadequate rejection of secondary far-end signals, compromising the quality of communication signals.
Innovation Solution
A novel dielectric filter design featuring a dielectric body with specific metal patterns and resonance holes, including N+4 through holes with metal layers, hollowed-out areas, and strategically placed metal line segments, which enhance inductive coupling and improve far-end rejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional metal patterns are used on the filter surface, then the structure is simple, but the communication signal quality is influenced due to inadequate far-end rejection
Solution Approach 1:
Metal line segments are introduced as intermediary elements between the resonance holes and the filter surface. These intermediaries provide precise impedance matching and coupling control, improving signal quality without requiring complex overall structure.
Solution Approach 2:
The metal patterns use variable line widths, spacing, and lengths to control impedance and coupling parameters. By changing these geometric parameters, the filter achieves both structural simplicity and high signal quality through parameter optimization rather than structural complexity.
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 novel dielectric filter achieves increased attenuation ratio at the near end outside the passband and delays the influence of far-end harmonic waves, thereby improving the quality of communication signals.
Implementation Method 1
inner walls of the N+4 through holes are provided with metal layers to form N+4 resonance holes
Implementation Method 2
a dielectric body, provided with an open surface
Data Source
AI summary
The present invention provides a novel dielectric filter, which comprises a dielectric body, N+4 through holes, and an end surface metal layer, wherein the end surface metal layer comprises a first metal block, a second metal block, N middle metal blocks, a penultimate metal block, a last metal block, a first metal sideline, a second metal line segment, a third metal line segment, a fourth metal line segment, and a fifth metal line segment; the first metal block, the second metal block, the N middle metal blocks, the penultimate metal block and the last metal block are respectively formed on peripheral sides of a first resonance hole, a second resonance hole, N middle resonance holes, a penultimate resonance hole and a last resonance hole.