Transceiver Cavity Ventilation for Moisture Resistance
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Solution Overview
Problem
Conventional transceiver devices in high-frequency bands face challenges in mounting microwave integrated circuits with low moisture resistance due to spatially independent transmission and reception cavities, leading to short water saturation times and compromised electrical isolation.
Innovation Solution
A transceiver device design featuring a dielectric substrate with a ring member and cover, incorporating a ventilation hole positioned at specific intervals relative to the cavity center, such as λg/4, to enhance moisture resistance while maintaining electrical isolation by effectively increasing the volume of the transmission cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission cavity and reception cavity are spatially independently structured to ensure electrical isolation, then electrical isolation is improved, but water saturation time is shortened
Solution Approach 1:
The patent merges the transmission cavity and reception cavity into a single integrated cavity structure, allowing both functions to coexist in one shared space. This eliminates the need for separate independent cavities while maintaining electrical isolation through strategic placement of microwave integrated circuits at positions where electromagnetic field interference is minimized, thereby extending water saturation time without compromising electrical isolation
2Volume of moving object
If cavity volume is reduced to improve integration, then device size is improved, but water saturation time is shortened
Solution Approach 1:
The patent changes the positioning parameters of microwave integrated circuits within the cavity, specifically placing them at locations where electromagnetic field strength is minimized. This parameter optimization allows the use of a smaller cavity volume while maintaining adequate water saturation time, as the circuits are positioned in regions less affected by electromagnetic resonance and field concentration
3Device complexity
If microwave integrated circuit is mounted in small volume cavity, then device integration is improved, but electrical isolation deteriorates
Solution Approach 1:
The patent applies local quality optimization by positioning microwave integrated circuits at specific locations within the cavity where electromagnetic field characteristics are most favorable for isolation. By selecting local positions with minimal field interference and appropriate field distribution patterns, the system achieves good electrical isolation between transmission and reception functions even within a small integrated cavity volume
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 allows for the mounting of microwave integrated circuits with low moisture resistance in small volume cavities while maintaining electrical isolation, extending water saturation times and minimizing leakage, thereby improving the operational stability of high-frequency semiconductor devices.
Implementation Method 1
a ventilation hole that communicates the cavities is formed, and the ventilation hole is arranged at a position that is shifted by substantially λg/4 from a cavity center
Implementation Method 2
where λg is a resonance wavelength according to a cavity size
Data Source
AI summary
A transceiver device includes a dielectric substrate, a ring member that is welded onto the dielectric substrate thereby forming a plurality of cavities, a cover that is welded onto the ring member, and at least one semiconductor device that is arranged in each of the cavities. The ring member has at least one passage that communicates between adjacent cavities. The passage is provided at a position shifted by substantially λg/4 or substantially n×λg/2+λg/4 from a center axis of the cavities. If there are two or more passages, the passages are arranged at a λg/2 interval, and one of the passages closest to the center axis is at a position shifted by substantially λg/4 from the center axis.