Microstrip line-coplanar stripline broadband transitional structure
A technology of coplanar stripline and transition structure, applied in the direction of waveguide-type devices, circuits, connecting devices, etc., can solve the problems of large size and large insertion loss, and achieve simple and compact circuits, low high-frequency insertion loss, and reduced The effect of structural dimensions
Inactive Publication Date: 2014-12-17
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0007] (1) The three transition structures from microstrip line to coplanar stripline proposed in Documents 1, 2, and 3 have large insertion loss at high frequencies
[0008] (2) The transition structure from microstrip line to coplanar stripline in Documents 2 and 3 has the disadvantage of large size due to the use of field matching section and impedance matching section
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Embodiment 1
[0035] to combine figure 2 , image 3 , taking the microstrip-coplanar stripline broadband transition structure operating at 6.3-18GHz as an example, the relative dielectric constant of the circuit substrate 4 used is 2.33, and the thickness is 0.508mm. The characteristic impedance of the input and output port 10 of the microstrip line is 50 ohms, the width w1 of the input and output port 10 of the microstrip line is 1.55 mm, the characteristic impedance of the input and output port 22 of the coplanar stripline is 155 ohms, and the input and output of the coplanar stripline The line width w0 corresponding to the port 22 is 1 mm, and the slot width s is 0.2 mm. In order to couple the energy of the microstrip line 1 into the coplanar stripline 2 at the three-dimensional vertical intersection 5, the conduction strip width w4 of the microstrip line at the three-dimensional vertical intersection 5 is obtained as 0.9 mm by means of the simulation software HFSS. The length L0 of t...
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The invention relates to a microstrip line-coplanar stripline broadband transitional structure, which consists of a microstrip line conduction band, a coplanar stripline, a microstrip line ground plate and a circuit substrate, wherein the microstrip line conduction band is located on the front of the circuit substrate, and the coplanar stripline and the microstrip line ground plate are integrally formed on the back of the circuit substrate; the coplanar stripline and the microstrip line conduction band are stereoscopically and vertically crossed, so that a stereoscopic and vertical intersection is formed; the microstrip line conduction band consists of a microstrip line input / output port, a microstrip line conduction band transmission section, a finite ground microstrip line conduction band transitional section, the stereoscopic and vertical intersection and a finite ground microstrip line conduction band open circuit end which are sequentially arranged; the microstrip line ground plate is provided with a finite ground microstrip line ground plate transitional section and a finite ground microstrip line ground plate; one end of the coplanar stripline is a coplanar stripline input / output port, and the other end of the coplanar stripline is a coplanar stripline short circuit end. The microstrip line-coplanar stripline broadband transitional structure has the advantages of small size, compact circuit structure and little high-frequency insertion loss.
Description
technical field [0001] The invention relates to the technical field of microwave passive devices, in particular to a broadband transition structure of microstrip coplanar stripline. Background technique [0002] In the field of antennas, dipole antennas are balanced antennas, and dipole antennas need balanced transmission lines such as coplanar striplines for feeding. Coplanar stripline is a balanced single-sided transmission line, which has the advantages of small size and easy integration. At present, the most commonly used signal transmission line in microwave integrated circuit design is microstrip line, which is a kind of unbalanced transmission line, so we must perform the conversion between balanced and unbalanced transmission lines when designing integrated circuit systems. Based on this background, we need to design a broadband transition structure with low loss, small size, microstrip line and coplanar stripline. [0003] The transition structure from microstrip ...
Claims
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IPC IPC(8): H01P5/10
Inventor 王建朋陶子文赵俊顶窦艳徐鑫
Owner NANJING UNIV OF SCI & TECH