LTCC Waveguide Feeding Networks Using Probe-Fed Apertures
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Solution Overview
Problem
Conventional waveguide feeding networks in co-fired ceramics are limited in size due to the ability to perform dividing or combining functions only in one direction, either perpendicular to the substrate surface or in a single horizontal layer, restricting the maximum size of the network.
Innovation Solution
The implementation of probe-fed apertures allows for waveguide dividing and combining in both parallel directions to the substrate surface and on different levels, enabling a more flexible and efficient use of substrate volume by stacking horizontal feed networks vertically and connecting them through probe-fed apertures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional waveguide feeding networks are implemented in co-fired ceramics with dividing functions only in one direction (normal direction or single horizontal layer), then the fabrication process is simple, but the maximum size of the feeding network is limited due to limited substrate thickness
Solution Approach 1:
The patent transitions from single-direction (horizontal layer only) waveguide dividing to multi-dimensional dividing by introducing vertical stacking of multiple horizontal feed networks at different levels within the substrate thickness, enabling three-dimensional network expansion
Solution Approach 2:
The feeding network is divided into multiple horizontal feed networks, each operating at a different vertical level within the substrate. These segmented networks are connected through probe-fed apertures, allowing independent design and fabrication of each layer while achieving overall network functionality
2Volume of stationary object
If waveguide dividing is performed only in the normal direction or single horizontal layer, then the device structure is simple, but the substrate volume utilization is limited
Solution Approach 1:
The patent utilizes the vertical dimension (thickness direction) of the substrate by stacking multiple horizontal feed networks at different levels, transforming a two-dimensional single-layer structure into a three-dimensional multi-level structure to maximize substrate volume utilization
Solution Approach 2:
Multiple horizontal feed networks are nested vertically within the substrate thickness, with each network operating at a different level. The probe-fed apertures penetrate through the substrate to connect these nested networks, creating a compact three-dimensional configuration
3Adaptability or versatility
If conventional single-direction waveguide dividing is used, then the wave polarization control is difficult, but the manufacturing process is straightforward
Solution Approach 1:
By introducing vertical stacking of horizontal feed networks at different levels, the patent enables control of wave polarization through the vertical arrangement and orientation of waveguides at different heights, providing additional degrees of freedom for polarization management
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
This approach enhances the flexibility and efficiency of waveguide networks, allowing for more extensive use of substrate volume and easier control of wave polarization, thereby increasing the capacity for dividing and combining inputs and outputs within a smaller space.
Implementation Method 1
at least one waveguide probe formed within the co-fired ceramic substrate, opening at a first probe end into the first waveguide channel aperture, and opening at a second probe end into the second waveguide channel aperture
Implementation Method 2
co-fired ceramic waveguide device for guiding electromagnetic waves, such as millimeter wavelength electromagnetic waves
Data Source
AI summary
In accordance with an embodiment of the present disclosure, there is provided a technique of using probe fed apertures to realize a waveguide feeding network that can be divided both parallel to the surface, and on different levels, of a co-fired ceramic substrate, such as a low temperature co-fired ceramic (LTCC) substrate. A horizontal feed network is divided into several sections, which can be stacked vertically in various different locations and on different layers within the substrate, and are connected by probe-fed apertures. In this way, waveguide dividing can be performed in directions that are parallel to the surface of the substrate and on different levels of the substrate, thereby increasing the efficiency of the use of the substrate volume and permitting dividing and combining of inputs and outputs in a more flexible manner.