Metal Plate Antenna Contact Layout for Impedance Matching
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Solution Overview
Problem
Metal plate antennas, such as inverted F antennas, face challenges with impedance matching and stable arrangement on substrates, which existing technologies have not adequately addressed.
Innovation Solution
A metal plate antenna design featuring a parallel part arranged parallel to the substrate, with a power feeding point contact part and a GND contact part extended perpendicularly to the parallel part, where the contact area of the power feeding point contact part is narrower than that of the GND contact part, facilitating impedance matching and stable arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an inverted F antenna is used, then the antenna structure is simple, but impedance matching is difficult to achieve
Solution Approach 1:
The patent applies local quality by creating asymmetric contact areas between the metal plate antenna and substrate. Specifically, the first contact area (power feeding point contact) is designed to be smaller than the second contact area (GND contact), allowing different electrical characteristics at different locations. This local differentiation enables impedance matching while maintaining the overall simple inverted F structure.
2Ease of manufacture
If an inverted F antenna is used, then the antenna can be easily fabricated, but stable arrangement on substrate is problematic
Solution Approach 1:
The patent employs asymmetry by designing the metal plate antenna with unequal contact areas with the substrate. The first contact area where the power feeding point contacts the substrate is intentionally made smaller than the second contact area where the GND contacts the substrate. This asymmetric configuration provides both mechanical stability for arrangement and electrical characteristics for impedance matching, while remaining compatible with simple press-machining fabrication processes.
Data Source
AI summary
There is provided a metal plate antenna arranged on a substrate, the metal plate antenna comprising: a parallel part arranged in substantially parallel to the substrate; a power feeding point contact part extended from the parallel part substantially perpendicularly to the parallel part, and provided in contact with a power feeding point arranged on the substrate; and a GND contact part formed separately from the power feeding point contact part, extended from the parallel part substantially perpendicularly to the parallel part, and provided in contact with a GND arranged on the substrate, wherein a contact area of the power feeding point contact part and the power feeding point is narrower than a contact area of the GND contact part and the GND.