Optimized matching design for small antenna wideband matching network and small antenna wideband matching network thereof
A broadband matching network and optimization method technology, applied in the field of broadband matching network, can solve the problems of poor impedance characteristics of electrically small antennas, difficult broadband matching, and difficult transmission line matching, etc., to achieve easy matching, flat impedance curve, and limited impedance small effect
Inactive Publication Date: 2009-03-18
BEIHANG UNIV
View PDF0 Cites 16 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
As we all know, the impedance characteristics of electrically small antennas are very bad, and it is quite difficult to match with transmission lines. If it is broadband matching, it is even more difficult. At the same time, its use efficiency is very low. Designing a suitable matching network for the impedance characteristics of electrically small antennas is quite important
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0045] The frequency range is 100MHz~180MHz, and the height is only 0.1λ max The impedance of the conformal electrically small antenna is used for real-frequency data acquisition, and the impedance characteristic curve and voltage standing wave ratio curve of the electrically small antenna are shown as figure 2 , image 3 shown. In the figure, figure 2 It is a graph of the VSWR (Voltage Standing Wave Ratio) of the electrically small antenna before matching. It can be seen that the standing wave ratio of the electrically small antenna varies greatly within the range of 100MHz to 180MHz. Such as image 3 It can be seen from the impedance curve of the antenna that the real part of the impedance is particularly low at the low frequency end and the high frequency end, especially at the low frequency end and the high frequency end, it is basically close to 1Ω, and it changes very drastically over the entire frequency band, while the imaginary part of the impedance Relative 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
Login to view more Abstract
The invention discloses an optimum match design of an electrically small antenna broadband matching network and the electrically small antenna broadband matching network, wherein a R-C additional damping network in a broadband matching network structure is directly connected with an electrically small antenna in parallel, and the impedance of the antenna can be changed into a new mode, which not only improves the impedance characteristics of an antenna end port and also prominently lowers the comparison between a real part and an imaginary part of the electrically small antenna, and namely the impedance of the electrically small antenna is compensated to a certain extent, which enables the electrically small antenna to be matched easily. The broadband matching network is designed through adopting an optimum method which combines a real frequency method and a direct optimization method. A better matching network structure is obtained through changing and filtering measured data of the antenna impedance from the characteristics of the electrically small antenna, and then, the optimization characteristics of the optimization algorithm are utilized to obtain each element value in the matching network structure. The standing wave ratio of the electrically small antenna with the matching network structure of the invention is smaller than 25 in a pass band, and the efficiency is bigger than 30% simultaneously, which enables the performance of the electrically small antenna to be greatly improved.
Description
technical field [0001] The present invention relates to a broadband matching network, more particularly, to a broadband matching network suitable for electrically small antennas and capable of realizing small impedance transformation. Background technique [0002] With the development of mobile communication technology, space technology and ultra-wideband electronic technology, all kinds of electronic equipment are developing in the direction of miniaturization and miniaturization. Communication antennas of mobile platforms (shipboard, vehicle-mounted, airborne, etc.) continue to be miniaturized. As we all know, the impedance characteristics of electrically small antennas are very bad, and it is quite difficult to match with transmission lines. If it is broadband matching, it is even more difficult. At the same time, its use efficiency is very low. Designing a suitable matching network for the impedance characteristics of electrically small antennas is quite important. Co...
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
Login to view more Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00H04B17/00H01Q9/04
Inventor 陈爱新张艳君姜铁华魏文轩
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
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