中文版本

Opportunity  

The rapid growth of Wi-Fi technology and the increasing demand for high-performance wireless communication systems have highlighted the limitations of conventional antennas used in consumer electronics, particularly in Wi-Fi routers. Traditional monopole antennas, which are commonly deployed in indoor environments, lack polarization diversity and omnidirectional coverage, leading to inconsistent signal performance in varying indoor settings. Additionally, existing transparent antennas, which are desirable for aesthetic integration into modern devices, often suffer from a trade-off between optical transparency and radiation efficiency. For instance, transparent conductive films like indium tin oxide (ITO) exhibit high power loss due to skin effects, while metal mesh grids, though more efficient, complicate manufacturing. Furthermore, polarization-diversity omnidirectional antennas typically require multiple dielectric substrates or complex feeding structures, increasing cost and design complexity. These challenges create a pressing need for a compact, low-cost, and high-performance antenna solution that combines polarization diversity, omnidirectional coverage, and aesthetic versatility for consumer applications.

Technology  

This patent introduces a single-substrate omnidirectional dielectric resonator antenna (DRA) that innovatively addresses the limitations of existing designs. The antenna comprises a dielectric resonator (preferably made of glass for high optical transparency) mounted on a single substrate with a planar feeding circuit. The feeding circuit is divided into two parts:  

1. First Feeding Part (Alford Loop): Excites the TE_01δ+1 mode for horizontal polarization (HP), providing omnidirectional coverage.  
2. Second Feeding Part (Circular Patch with Shorted Stubs): Excites the TM_01δ mode for vertical polarization (VP), ensuring orthogonal polarization diversity in the same frequency band (e.g., 2.4 GHz Wi-Fi).  

Key innovations include:  

• Single-Substrate Design: Eliminates the need for multiple substrates or drilling holes in the resonator, reducing cost and complexity.  
• Planar Feeding Circuit: Integrates both feeding structures (Alford loop and circular patch) on one layer, enabling compact size and ease of fabrication.  
• High Isolation (>27 dB): The orthogonal modes minimize interference between HP and VP ports.  
• Dual-Functionality: The glass resonator can simultaneously serve as a decorative or advertising projection device (e.g., engraved patterns illuminated by LEDs).

Advantages  

• Polarization Diversity: Replaces two conventional Wi-Fi antennas with a single compact unit.  
• Omnidirectional Coverage: Ensures stable signal reception in all azimuthal directions.  
• High Efficiency: Glass DRAs achieve >90% radiation efficiency without transparency trade-offs.  
• Aesthetic Flexibility: Customizable glass designs (e.g., engraved logos) for consumer electronics.  
• Cost-Effective: Simplified single-substrate fabrication lowers production costs.  
• Broadband Performance: 9.9% bandwidth (2.29–2.53 GHz) fully covers 2.4 GHz Wi-Fi bands.

Applications  

• Wi-Fi Routers: Replaces monopole antenna pairs with a unified, high-performance solution.  
• Smart Home Devices: Integrates seamlessly into transparent/translucent surfaces (e.g., smart mirrors, windows).  
• Advertising/Decoration: Projects illuminated patterns or logos (e.g., ceiling-mounted LED displays).  
• 5G/IoT Devices: Suitable for compact, polarization-diverse MIMO systems.  
• Automotive Electronics: Transparent antennas for in-vehicle infotainment or heads-up displays.