Stripline/slotline hybrid broadband two-dimensional sum-difference network

Abstract

The invention discloses a strip line / slot line mixed broadband 2D sum-difference network and aims to provide a broadband 2D sum-difference network which is high in antijamming capacity, high in structure strength and low in cost. The technical scheme is implemented as follows: rectangular strip lines corresponding to rectangular slots are produced on the junction surface of upper and lower mediumplates, and dumbbell-shaped slot lines corresponding to the rectangular slots are produced on side surfaces of upper and lower metal earth plates, so that four planar magnet-Ts which are distributed in upper, lower, left and right positions at intervals and have strip line-double side slot line closed transition structures are formed; vertical single-arm branches distributed on left and right sides extend and turn in the vertical direction of branches and then define an inverted-U-shaped strip line with the upper planar magnet-T, strip lines of two wing branches of the lower planar magnet-T are parallel to the lower side of the opening of the U-shaped strip line and form an unclosed rectangular strip line with the U-shaped strip line, double-row linear array metalized passing holes envelope strip line conductor belts and penetrate through the metal earth plates and the medium plates, and a topological structure of the strip line / slot line mixed broadband 2D sum-difference network is formed.

Description

technical field [0001] The invention belongs to the field of microwave and millimeter wave technology, and relates to a broadband two-dimensional sum-difference network based on a stripline / slotline mixed structure. Background technique [0002] The two-dimensional sum and difference network, also known as two-dimensional comparator and two-dimensional sum difference, can simultaneously superpose and subtract four signals, and output the sum and difference signal at the same time. As a key component of the millimeter-wave monopulse radar antenna feed system, the performance of the sum and difference network often directly affects important indicators such as radar tracking accuracy and tracking distance. The traditional two-dimensional sum and difference network generally achieves its electrical performance by cascading a 3dB bridge loaded with a 90° delay line. However, due to the strong dispersion effect of the delay line, its wideband amplitude consistency and phase consi...

AI Technical Summary

Problems solved by technology

Moreover, the passband bandwidth generated by harmonics is difficult to meet the requirements of the characteristic bandwidth, thus increasing the difficulty of circuit design, and the coupling between multiple stages makes the insertion loss in the band larger

Affects the transfer characteristics of the filter structure

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