Novel 4*4 Butler matrix feed network

A feeding network and matrix technology, applied in the field of 4×4 Butler matrix feeding network, to achieve the effect of reducing volume, improving electrical performance, and increasing applicable occasions

Inactive Publication Date: 2013-04-03
BEIHANG UNIV
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing Butler matrix feed network must use a jumper to realize on the plane, which increases its complexity and also limits the use of the Butler feed matrix to a certain extent. And its bandwidth generally does not exceed 15%

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
  • Novel 4*4 Butler matrix feed network
  • Novel 4*4 Butler matrix feed network
  • Novel 4*4 Butler matrix feed network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] figure 1 What is shown is the existing conventional 4×4Butler matrix feed network, and all its components are on one plane. The 4×4 Butler matrix feed network includes 8 ports A, B, C, D, E, F, G, H, two 45° fixed phase shifters 11, and four 3db directional couplers with 90° phase shift characteristics 12. Four 3db directional couplers 12 with 90-degree phase shift characteristics are divided into two groups, the lower two form the first group of 3-decibel 90-degree directional couplers, and the upper two form the second group of 3-decibel 90-degree directional couplers. One end of the first set of 3dB 90° directional couplers is connected to the antenna unit, and the other end is connected to the second set of 3dB 90° directional couplers; one end of the second set of 3dB 90° directional couplers is connected to the beam port, and the other end is connected to...

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 provides a novel 4*4 Butler matrix feed network and belongs to the field of microwave engineering. The Butler matrix feed network is arranged between the wave beam port of wave beam forming equipment and the antenna port of an antenna array and is realized through a micro-strip circuit manner; the Butler matrix feed network is machined on double-faced copper-plated PCBs (Printed Circuit Board); the PCBs are stuck together back to back and are symmetrically placed up and down; three 3-decibel 90-degree directional couplers are arranged on one PCB and residual one coupler is arranged on the other PCB; and vertical metal through holes are machined on the PCBs to replace a jumper in a traditional structure, so as to realize signal transmission between the two layers of the PCBs. According to the novel 4*4 Butler matrix feed network, the structure of the Butler matrix feed network is greatly simplified and the volume is reduced; and a broadband Schiffman phase shifter is matched with three branched branch wire directional couplers to expand the bandwidth of a Butler matrix, so that the relative bandwidth of the feed network is more than 25%.

Description

technical field [0001] The invention belongs to the field of microwave engineering and relates to a novel 4*4 Butler matrix feed network. Background technique [0002] The Butler matrix is ​​a circuit-like beamforming network, which has multiple input and output ports at the same time, and the phase relationship between the relevant ports is very peculiar, and is mainly used in antenna systems that have special requirements for beam pointing, such as third-generation mobile Smart antennas for communication systems, etc. This kind of feeding matrix has a very clear physical meaning, and it is relatively easy to realize in the circuit, so it has been extensively studied. [0003] The Butler matrix is ​​a completely passive and reciprocal network. This feed matrix uses 3db directional couplers with 90-degree phase shift characteristics and fixed phase shifters with different phase shift characteristics. A Butler matrix for an N-element line antenna array should have correspon...

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): H01Q3/40
Inventor 丁轲佳贺斐丁文锐
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap