Patch Antenna RF Circuit Layout With GND Pin Shielding
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Solution Overview
Problem
Conventional antenna devices require space for RF circuits inside the patch antenna, leading to larger device sizes due to oversized patch and GND conductors.
Innovation Solution
The antenna device incorporates a patch conductor on a substrate with GND pins connecting it to a GND conductor, and an RF circuit is placed on the patch conductor's surface, surrounded by GND pins, eliminating the need for internal RF circuit space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If RF circuit components are installed inside the patch antenna, then the antenna device can be integrated, but the patch conductor and GND conductor become larger than necessary, increasing the device size
Solution Approach 1:
The patent relocates the RF circuit from the interior space of the patch antenna to the outer surface of the patch conductor. This dimensional transition from 3D interior space to 2D surface mounting allows the antenna to maintain compact conductor dimensions while still achieving integrated RF circuit functionality, effectively resolving the size-complexity contradiction.
2Area of stationary object
If the patch conductor and GND conductor are made larger to accommodate internal RF circuits, then RF circuit installation space is provided, but the overall device size increases
Solution Approach 1:
The patent extracts the RF circuit from the interior space of the patch antenna and places it on the outer surface of the patch conductor. This extraction eliminates the need to enlarge the patch conductor and GND conductor to accommodate internal RF circuits, thereby maintaining compact device dimensions while still providing adequate space for RF circuit components on the conductor surface.
3Device complexity
If RF circuits are placed inside the patch antenna, then integration is achieved, but shielding against radio wave intrusion and noise leakage becomes more difficult
Solution Approach 1:
By moving the RF circuit to the outer surface of the patch conductor, the patent creates a natural shielding configuration where the conductive patch structure itself surrounds and protects the RF circuit components. This surface mounting approach on the conductor exterior provides inherent electromagnetic shielding while maintaining integration, avoiding the shielding difficulties associated with internal placement.
Data Source
AI summary
An antenna device includes: a patch conductor provided on a substrate; a GND conductor provided in the substrate in such a manner as to face the patch conductor; GND pins that are provided in the substrate and that connect the patch conductor and the GND conductor; and an RF circuit provided on a first face of the patch conductor opposite to a second face of the patch conductor, the second face being attached to the substrate, the RF circuit being provided in such a manner as to be surrounded by the GND pins.