Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Visible light LED wireless communication light receiving antenna

A technology of light-emitting diodes and light-receiving antennas, used in optical fiber radio, optical fiber transmission, electromagnetic wave transmission systems, etc., can solve the problems of limiting the size of light-receiving antennas, unable to meet small size requirements, and high receiver noise, and achieve good light reception. effect, good short focus convergence effect, the effect of widening the reception angle and range

Inactive Publication Date: 2010-05-12
NANJING UNIV OF POSTS & TELECOMM
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of the detector will increase with the increase of its photosensitive area, and the larger the photosensitive area, the smaller the receiver bandwidth, and the greater the receiver noise; the tapered optical fiber is placed behind the convex lens, the structure is complex, and the cost is high. And it will limit the size of the light-receiving antenna; the sensor positioning and aiming tracking system is expensive, difficult to implement, and the sensitivity is not high, and it cannot meet the small size requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Visible light LED wireless communication light receiving antenna
  • Visible light LED wireless communication light receiving antenna
  • Visible light LED wireless communication light receiving antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] An optical receiving antenna for wireless optical communication proposed by the present invention consists of a main Fresnel lens and several secondary Fresnel lenses bonded to form a "table-shaped" structure. The top surface of the "terrace" is a regular polygonal main Fresnel lens made of PMMA material or other optical materials, and its side is surrounded by multiple secondary Fresnel lenses of the same shape that are symmetrical to the center of the main Fresnel lens. combined.

[0019] see figure 1 Shown example, this receiving antenna main body is made of Fresnel lens, comprises a main Fresnel lens 1, several Fresnel lenses 2 and photodetector 5, and described main Fresnel lens 1 is regular polygon; So Each sub-Fresnel lens 2 is bonded with the main Fresnel lens 1 at a fixed angle, and at the same time, it is symmetrical with the axis of the main Fresnel lens 1 and bonded to each other; the main Fresnel lens 1 and each sub-Fresnel lens The Neil lens 2 forms a "m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a visible light LED wireless communication light receiving antenna. The antenna is of a trapezoid structure formed by bonding a plurality of Fresnel lenses comprising a principal Fresnel lens (1) and plural subordinate Fresnel lenses (2); the principal Fresnel lens is the top face of the trapezoid and the subordinate Fresnel lenses are the lateral faces of the trapezoid; the principal Fresnel lens and the subordinate Fresnel lenses receive incoming optical signals from different directions with the range constrained in the angle formed by a principal optical axis (3) and a subordinate optical axis (4), and focus the light energy on the surface of a receiver (5) so as to expand receiving angle and receivable light energy. The Fresnel lenses are thin and have good short focus focusing effect, and the shapes of the antenna can be combined at will according to actual receiving condition. The invention is simple in structure, small in size, light in weight and low in cost, has large light receiving angle and good receiving performance, and is easy to implement.

Description

technical field [0001] The invention relates to a light-receiving antenna in a wireless optical communication system, which can ensure high-efficiency light reception while reducing the geometric size of the light-receiving antenna, and can especially improve the light-receiving effect when signal light is obliquely incident. It belongs to the technical field of optical communication equipment manufacturing. Background technique [0002] Visible light LED (light emitting diode) has many excellent characteristics such as high brightness, high reliability, low energy loss and long life, and can be used for display, lighting, traffic signal indication, etc. While the visible light LED is used as a light source for indoor lighting, it has many advantages as a signal light source for wireless communication. It uses optical signals as the carrier and transmits optical signals through the atmosphere as the transmission medium. It has the characteristics of large information capaci...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/00H04B10/2575
Inventor 徐宁徐丹彤钱晨
Owner NANJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com