Double-sided Parallel Stripline-Coaxial Conversion Structure and Method for Reducing Return Loss

Abstract

The invention relates to a double-sided parallel strip line-coaxial conversion structure and a method for reducing return loss. The structure includes a microwave dielectric plate and metal strip lines of equal width printed on both sides of the microwave dielectric plate, and a coaxial line The outer conductor and the metal strip line on this side are welded in parallel; the metal strip line divides the quasi-coplanar waveguide transition section through the "concave"-shaped gap, and the metal strip line with the quasi-coplanar waveguide transition section located in the "concave"-shaped gap is called The center strip line of the quasi-coplanar waveguide transition section is the center strip line of the quasi-coplanar waveguide transition section, and the non-contact metal strip line of the inner conductor of the coaxial line is connected with the center strip line of the quasi-coplanar waveguide transition section. The metallized via holes connect the central stripline of the quasi-coplanar waveguide transition section on one side of the microwave dielectric board and the metal stripline on the other side. The method is: slot line width w 1 , the width of the central strip line w 2 After the initial value of the length l of the central band line is selected, a set of optimal values ​​that meet the requirements are obtained. The bandwidth of the invention is expanded, the return loss is reduced, and the size of the metal ground is reduced.

Description

technical field [0001] The invention relates to a double-sided parallel strip line-coaxial line conversion structure and a method for reducing return loss, and belongs to the field of microwave technology. Background technique [0002] Double-sided Parallel Strip Line (Double-sided Parallel Strip Line, DSPSL) is a classic balanced microwave transmission line, which has been widely used in microwave circuits, antennas and other technical fields. Conversion between different types of transmission lines is often encountered in practical applications, such as unbalanced transmission line-balanced transmission line conversion (such as dual-wire-microstrip line conversion). In the published literature, the conversion structure of DSPSL-microstrip line and DSPSL-coplanar waveguide has been fully studied, and the technology has been widely used. In the existing application technology, DSPSL-coaxial line conversion often uses microstrip line as the transition structure, that is, DSP...

AI Technical Summary

Problems solved by technology

In the existing application technology, DSPSL-coaxial line conversion often uses microstrip line as the transition structure, that is, DSPSL-microstrip line-coaxial line transition structure, which can meet most application scenarios. However, due to the microstrip line As an unbalanced transmission line, a wider metal layer is required as the ground, which is difficult to meet the application scenarios with limited size

Images