Integrated Duplexer Phase Shifter for Compact Signal Isolation
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Solution Overview
Problem
Existing duplexer designs with phase shifters require complex and time-consuming fabrication processes, leading to increased size and difficulty in reducing the overall dimensions of the device due to the separate formation of inductors and capacitors on a substrate.
Innovation Solution
A phase shifter with a simplified fabrication process where the inductor and capacitor share a region on the substrate, with concurrent formation of connection pads, insulation layers, and coil forming portions, allowing for a compact design by integrating these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inductor and capacitor are formed through separate processes, then the phase shifter can achieve the necessary signal isolation and phase shift functionality, but the fabrication process becomes complicated and the device size increases
Solution Approach 1:
The patent combines the formation of the inductor and capacitor into a single integrated structure. The capacitor is formed within the hollow interior of the coil forming portion of the inductor, allowing both components to be created through concurrent deposition processes rather than separate sequential processes. This merging reduces fabrication complexity while maintaining the necessary signal isolation and phase shift functionality.
Solution Approach 2:
The capacitor is nested inside the hollow interior space of the coil forming portion of the inductor. This nested configuration allows the capacitor to be positioned within the existing inductor structure, enabling concurrent formation of both components and reducing the overall device footprint while maintaining functional performance.
2Reliability
If the inductor and capacitor are formed through separate processes, then the phase shifter can achieve the necessary signal isolation and phase shift functionality, but the device size increases making it difficult to reduce the overall dimensions
Solution Approach 1:
The capacitor is nested inside the hollow interior space of the coil forming portion of the inductor. This nested configuration allows the capacitor to be positioned within the existing inductor structure, enabling concurrent formation of both components and reducing the overall device footprint while maintaining functional performance.
Solution Approach 2:
The patent combines the formation of the inductor and capacitor into a single integrated structure. The capacitor is formed within the hollow interior of the coil forming portion of the inductor, allowing both components to be created through concurrent deposition processes rather than separate sequential processes. This merging reduces fabrication complexity while maintaining the necessary signal isolation and phase shift functionality.
Data Source
AI summary
A phase shifter fabricated by a simple process and having a simple structure, a method of fabricating the same, and a duplexer having the same are disclosed. The duplexer includes a transmitting-end filter capable of passing only a signal in the range of a transmission frequency, a receiving-end filter capable of passing only a signal in the range of a reception frequency, and a phase shifter interposed between the transmitting-end filter and the receiving-end filter to isolate a transmitted signal of the transmitting-end filter and a received signal of the receiving-end filter from each other. The phase shifter includes a substrate provided with an input port and an output port, an inductor formed on the substrate and connected to the input and output ports, and a capacitor provided on the substrate, wherein the capacitor and inductor share a region of the substrate.