A stripline-coaxial vertical transition structure

Abstract

The invention belongs to the microwave antenna technology, and relates to the improvement of the strip line-coaxial vertical transition structure. It includes a stripline and a coaxial line [3] vertically connected to the stripline, and is characterized in that there is a transition conductor [3c] in the transition hole, and the upper end surface of the transition conductor [3c] is connected to the end of the stripline [2a] The head edge is welded to form an electrical connection, the lower end surface of the transition conductor [3c] and the end of the coaxial line [3] inner conductor [3a] are welded to form an electrical connection, and the diameter R=1.2~2.5r of the transition conductor [3c]. The invention makes the impedance of the connection position of the transition structure to be a resistive impedance, so that the impedances of the two transmission lines can be completely matched, and the problems of voltage standing wave ratio deterioration, insertion loss increase and working frequency band narrowing caused by impedance mismatch are avoided.

Description

A Stripline-Coaxial Vertical Transition Structure technical field The invention belongs to the microwave antenna technology, and relates to the improvement of the strip line-coaxial vertical transition structure. Background technique The stripline-coaxial vertical transition structure is mainly used to reduce the volume of microwave devices in order to increase space utilization. The existing stripline-coaxial vertical feed structure is composed of a stripline and a coaxial line vertically connected to the stripline. The strip line is composed of a single-sided copper-clad cover plate and a double-sided copper-clad microstrip board. combine. There is a transition hole through the microstrip board on the microstrip board. After passing through the transition hole, the inner conductor of the coaxial line is welded with the end of the strip line to form an electrical connection. There is a relief hole on the copper clad foil around the lower port of the transition hole, t...

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Problems solved by technology

The disadvantage of the above structure is: the impedance of the connection position of the transition structure is capacitive, which causes the impedance mismatch of the two transmission lines, which makes the voltage standing wave ratio of the connection position of the transition structure deteriorate sharply, the insertion loss also increases sharply, and the working frequency band narrows

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