Balanced Strip-Shaped Dielectric Filter for Low-Loss Self-Packaging
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Solution Overview
Problem
Existing balanced-type dielectric filters are costly and lack self-packaging capabilities when combined with a metal chamber structure, limiting their integration and cost-effectiveness.
Innovation Solution
A balanced-type strip-shaped dielectric substrate integrated filter is designed with a high dielectric-constant substrate and low dielectric-constant substrates with metal grounds symmetrically stacked, featuring strip-shaped dielectric blocks with grooves and air grooves, forming cavity-type resonators that enable low-loss and packageable characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ceramic dielectric materials are used with metal chamber structure, then high Q-value and temperature stability are achieved, but manufacturing cost increases and manual mounting is required
Solution Approach 1:
The patent merges the dielectric resonator and feeder structure into a single integrated substrate, eliminating the need for separate metal chamber assembly. The substrate integrates both functions, allowing direct mounting on planar circuits and removing manual assembly steps while maintaining high Q-value performance through the dielectric resonator design.
Solution Approach 2:
The dielectric substrate serves multiple functions simultaneously: it acts as both the resonator housing and the feeder structure, and can be directly integrated with planar circuits. This multi-functionality eliminates the need for separate metal chambers and manual assembly, reducing manufacturing cost while maintaining reliability.
2Reliability
If ceramic dielectric materials are used with metal chamber structure, then high Q-value is achieved, but integration level with planar circuits is limited
Solution Approach 1:
The patent combines the resonator and feeder into a single integrated substrate structure, enabling direct integration with planar circuits. This merging allows the filter to be seamlessly incorporated into planar circuit architectures while maintaining the high Q-value characteristics of dielectric resonators.
Solution Approach 2:
The patent replaces the traditional mechanical assembly of separate metal chamber and dielectric block with an integrated substrate structure. This substitution enables direct integration with planar circuits through standardized mounting interfaces, significantly improving adaptability while preserving the electromagnetic performance of dielectric resonators.
3Adaptability or versatility
If dielectric block is mounted on substrate with integrated feeder structure, then ease of integration is improved, but manual mounting is still required increasing complexity
Solution Approach 1:
The patent merges the feeder structure and resonator into a single integrated substrate, eliminating the need for separate mounting operations. This integration reduces assembly complexity from multiple manual steps to a single direct mounting process on planar circuits.
Solution Approach 2:
The integrated substrate design allows the filter to be self-contained with all necessary components (feeder, resonator, housing) built-in. This self-service design eliminates the need for external metal chambers and complex assembly procedures, reducing manufacturing complexity while maintaining high integration level.
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 achieves a high Q-value, low-loss, and cost-effective filter with improved integration and self-packaging, offering enhanced frequency-selectivity and out-of-band suppression.
Implementation Method 1
The two strip-shaped dielectric blocks and the first low dielectric-constant dielectric substrates, the second low dielectric-constant dielectric substrates and the metal grounds cooperatively constitute two cavity-type strip-shaped dielectric resonators
Implementation Method 2
a high dielectric-constant dielectric substrate; and first low dielectric-constant dielectric substrates, second low dielectric-constant dielectric substrates and metal grounds symmetrically stacked on upper and lower surfaces of the high dielectric-constant dielectric substrate
Data Source
AI summary
A balanced-type strip-shaped dielectric substrate integrated filter includes: a high-k dielectric substrate; and first low-k dielectric substrates, second low-k dielectric substrates and metal grounds are symmetrically stacked on upper and lower surfaces of the high-k dielectric substrate. Compared with an existing balanced-type dielectric filter, a high Q-value strip-shaped dielectric substrate integrated resonator with a packageable characteristic which works in TM111 mode and employs strip-shaped dielectric blocks with double grooves, combined with air groove structures of upper and lower layers and a packaging substrate is proposed, so that problems that cost is high and self-packaging cannot be realized of the existing balanced-type dielectric filter when being implemented by combining ceramic dielectric with a metal chamber structure can be solved, and thereby a balanced-type strip-shaped dielectric substrate integrated filter with the characteristic of low loss is realized; and meanwhile the filter may have advantages of self-packaging, high integration level and low cost.