Directional Antenna Parallel Reflector Gain
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Solution Overview
Problem
Existing directional antennas, such as Yagi-Uda antennas, face a challenge in increasing gain and directivity without expanding the antenna area, which is necessary for compact electronic products with wireless communication functions.
Innovation Solution
A directional antenna system that includes a substrate with at least one directional antenna and a reflector disposed in parallel to the radiation plane, which reflects the radiating pattern to enhance gain without altering the antenna's physical dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If directors are added to the Yagi-Uda antenna to increase directivity and gain, then the antenna performance improves, but the antenna area increases
Solution Approach 1:
The patent introduces a reflector element positioned behind the antenna array, utilizing the spatial dimension perpendicular to the radiation direction. This reflector creates constructive interference in the forward direction by reflecting backward-propagating waves, thereby increasing gain without requiring additional directors that would expand the antenna's lateral dimensions.
Solution Approach 2:
The reflector serves as an intermediary element that mediates the electromagnetic wave propagation. It captures waves that would otherwise radiate in unwanted directions and redirects them constructively toward the desired radiation direction, effectively increasing gain without adding more active radiating elements that would increase antenna area.
2Productivity
If multiple Yagi-Uda antennas are used in MIMO or beam switchable systems, then data throughput and transmission distance improve, but system complexity increases
Solution Approach 1:
The patent combines multiple antenna elements into a single integrated antenna array structure with a shared reflector. This merging approach allows multiple antennas to cooperate for MIMO or beam switching functions while sharing common passive elements (the reflector and ground plane), thereby reducing overall system complexity compared to having completely separate antenna systems.
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 effectively increases antenna gain and directivity by reflecting radiated signals, improving peak gains from 4.5 dBi to 6.5 dBi and enhancing directivity, while maintaining a compact form factor by using a single reflector instead of adding directors to each antenna.
Implementation Method 1
a reflector, disposed in parallel to the radiation plane of the directional antenna, for reflecting the radiating pattern of the directional antenna, to increase a gain of the directional antenna
Data Source
AI summary
The present invention discloses a directional antenna for a multi-in multi-out or antenna beam switchable wireless communication system, including a substrate, at least one directional antenna, formed on the substrate, for generating a radiating pattern of a radiation plane according to a feeding signal, and a reflector, disposed in parallel to the radiation plane of the directional antenna, for reflecting the radiating pattern of the directional antenna, to increase a gain of the directional antenna corresponding to the radiation plane.