Waveguide Feed Substrate Embedding for Antenna Alignment
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Solution Overview
Problem
Current liquid crystal antennas face challenges with high insertion loss due to poor alignment precision when integrating glass structures with Printed Circuit Boards (PCBs), as most Substrate Integrated Waveguide (SIW) feeders require fixing frames, leading to assembly inaccuracies and increased losses.
Innovation Solution
A waveguide feed substrate with a receiving groove and embedded hollow waveguide feeder, made from materials like glass, silicon, or ceramic, and metal, is designed to improve alignment precision by bonding with a second base substrate, reducing mechanical assembly errors and enhancing integration with PCBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glass structures are integrated with PCB substrates using fixing frames, then the integration is achieved, but assembly accuracy deteriorates
Solution Approach 1:
The patent merges the glass substrate and PCB substrate into a single integrated waveguide feed substrate. The receiving groove is directly formed on the glass substrate, eliminating the need for separate fixing frames. This integration maintains the advantages of glass materials while achieving precise assembly without additional mechanical fastening components.
Solution Approach 2:
The patent extracts and removes the fixing frame component from the assembly process. By directly forming the receiving groove on the glass substrate and embedding the waveguide feeder within it, the design eliminates the separate fixing frame that previously caused assembly inaccuracies, achieving both integration and precision.
2Ease of manufacture
If through holes are formed in dielectric slabs for SIW manufacturing, then waveguide structure is achieved, but alignment precision deteriorates
Solution Approach 1:
The receiving groove is pre-formed on the glass substrate before waveguide feeder installation. This preliminary structuring establishes precise positioning features that guide the waveguide feeder placement, ensuring high alignment precision without requiring post-assembly adjustments or complex through-hole drilling operations.
Solution Approach 2:
The waveguide feeder is nested within the receiving groove formed on the glass substrate. This nested configuration ensures precise alignment and positioning of the waveguide feeder relative to the substrate, eliminating the alignment issues associated with through-hole drilling and plating methods.
3Stability of the object's composition
If fixing frames are used to assemble waveguide feeders, then structural stability is achieved, but insertion loss increases
Solution Approach 1:
The waveguide feeder is merged with the glass substrate through direct embedding in the receiving groove, eliminating the need for separate fixing frames. This integration maintains structural stability while removing the mechanical interfaces that cause signal reflection and insertion loss, achieving both stability and low loss performance.
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 reduces antenna system losses and improves assembly accuracy by enabling precise bonding of waveguide feed substrates with antenna substrates, resulting in stable and efficient electromagnetic wave transmission.
Implementation Method 1
stable and efficient electromagnetic wave transmission
Implementation Method 2
a second base substrate is disposed on a side of the second side of the waveguide feeder distal to the first side, and the second base substrate is connected to the upper surface of the first base substrate, on which the receiving groove is provided, by bonding
Data Source
AI summary
A waveguide feed substrate and a manufacturing method thereof, and an antenna system and a manufacturing method thereof are provided. The waveguide feed substrate comprises: a first base substrate provided with a receiving groove; and a waveguide feeder embedded in the receiving groove and provided with a first side disposed at a bottom of the receiving groove, a second side disposed opposite to the first side, a third side disposed on a first side wall of the receiving cell, and a fourth side disposed on a second side wall of the receiving cell; wherein an opening is disposed in the second side, and an upper surface of the second side is flush with an upper surface of the first base substrate.