A Planar Magic T with Common Mode Suppression
A common mode suppression and plane magic technology, applied in the field of plane magic T, can solve the problems of port isolation and phase difference need to be improved, unfavorable for the popularization and application of wireless communication systems, unable to realize the common mode suppression function, etc. Simple structure and low production cost
Active Publication Date: 2020-04-17
NANJING UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the port isolation and phase difference of this device need to be improved, and its processing technology is more complicated, and there is no common mode rejection function
[0006] From the above, it can be seen that the existing technologies focus on the design of unbalanced ports to realize the planar magic T, which cannot realize the common mode suppression function, which is not conducive to the popularization and application of modern wireless communication systems
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 1
[0042] The structure of a planar magic T with common mode suppression function is as follows figure 1 As shown, the top view is as figure 2 As shown, the relevant dimensions and specifications are as follows image 3 shown. The dielectric substrate 5 used has a relative permittivity of 3.55, a thickness of 0.508 mm, and a loss tangent of 0.0035. combine image 3 , the width of the first input port 50 ohm microstrip conduction strip 11 is W 0 =1.18mm, the width W of the third quarter-wavelength transmission line 22 1 =1.05mm, the width of the second half wavelength transmission line 42 is W 2 =0.3mm, the length L of the first quarter-wavelength transmission line 12 1 =47mm, the vertical section L of the second quarter-wavelength transmission line 13 12 =24mm, the horizontal section L of the three-quarter wavelength transmission line 23 13 =22mm, the long horizontal section L of the first half-wavelength transmission line 32 31 =21.2mm, the vertical section L of the fi...
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 a planar magic T having a common mode inhibition function. The planar magic T comprises a sum signal input port feed line arranged at an upper surface of a medium substrate, adifference signal input port feed line, a first difference output port feed line, a second difference output port feed line and a metal grounding board arranged at a lower surface of the medium substrate, wherein the sum signal input port feed line comprises two mutually-connected one-quarter wavelength transmission wires, the difference signal input port feed line comprises a one-quarter wavelength transmission wire and a three-quarter wavelength transmission wire, and the first difference output port feed line and the second difference output port feed line respectively comprise a one-half wavelength transmission wire. The planar magic T is advantaged in that miniaturization, high common mode inhibition and high isolation characteristics are realized, and the planar magic T is suitable for modern wireless communication systems.
Description
technical field [0001] The invention relates to the technical field of microwave passive devices, in particular to a planar magic T with a common-mode suppression function which has the characteristics of miniaturization, high common-mode suppression and high isolation. Background technique [0002] In recent years, compared with unbalanced circuits, balanced circuits have higher environmental noise immunity, better dynamic range, and stronger anti-electromagnetic interference capabilities. Balanced circuits can transmit differential-mode signals within the working passband range and suppress common modulo signal. At present, most planar magic Ts focus on the design of unbalanced ports. If common-mode signals need to be suppressed, the output port must be additionally terminated with a balun. Therefore, the planar magic T with common-mode suppression function can not only effectively reduce the size of the system, simplify the complexity of system design, but also suppress ...
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 Patents(China)
IPC IPC(8): H01P5/20
Inventor 黄烽王雪道陈全刚王建朋
Owner NANJING UNIV OF SCI & TECH