SU1675975A1 - Waveguide-microstrip transition - Google Patents

Abstract

The invention can be used in miniature devices having a waveguide input. The purpose of the invention is the expansion of the working frequency band of the waveguide-microstrip junction. The waveguide-microstrip junction contains a segment 1 of a rectangular waveguide and a dielectric substrate introduced into it through a rectangular hole on which strip conductor 7 and communication element 8 are arranged, made in the form of open strip conductor 9 and two stubs 10 and None connected to the conductor 7. The choice of the size of the open conductor 9 provides for the extension of the working frequency band from SWR 1.1 to the entire frequency range of segment 1. 2 Il.

Description

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The invention relates to microwave technology and can be used in miniature devices containing a waveguide input.

The aim of the invention is to expand the working frequency band.

FIG. 1 shows a waveguide-microstrip junction design; in fig. 2 is a view A of FIG. 1 (with removed end wall).

The wave-microstrip junction contains a segment 1 of a rectangular waveguide, shorted by an end wall 2, in the middle of one of the wide walls 3 of which a rectangular hole 4 is made, through which a dielectric substrate 5 is inserted into the cavity of segment 1, located at a quarter of the wavelength of the branch wall 2 parallel to it, and on one side of the dielectric substrate 5, on the outer side of the segment 1, there is a grounding base 6 connected to one side of the rectangular hole 4, and on the other side azmescheny strip conductor 7 and the element 8 bond attached thereto disposed within the cavity of the section 1 and configured as an open strip conductor 9 and two loops 10 and 11, crossing it at right angles and arranged symmetrically relative to its longitudinal axis. The length AND of the section 12 of the open strip conductor 9 between the connection point 13 and the cable 10 closest to the rectangular opening 4 does not exceed 0.033 AO. and the distance r between loops 10 and 11 does not exceed 0.018 AO, where AO is the average operating wavelength.

Wave-microstrip transition works as follows.

The microwave signal arriving at section 1 excites element 8 and then passes to the strip conductor 7. Thanks to the selected dimensions of element 8, matching improves. When performing a waveguide-microstrip junction in a section of 1 7.2 x 3.4 mm and dielectric

the substrate 5 of quartz with a thickness of 0.3 mm, the cable 11 has a width of 0.34 mm and a length of 2.38 mm, and the cable 10 is a width of 0.49 mm and a length of 2.33 mm, while And 0.31 mm, g 0.16 mm At the same time in the entire working frequency band

Waveguide SWR 1.1.

Claims (1)

The invention The wavy-microstrip junction containing a segment of rectangular the waveguide, shorted by the end wall, in the middle of one of the wide walls of which a rectangular hole is made, through which a dielectric substrate is inserted into the cavity of a rectangular waveguide section, located a quarter of the wavelength from the end wall parallel to it, and on one side of the dielectric substrate on the outside of the rectangular waveguide, a grounding base is connected to one side of the rectangular hole, and a strip wire is placed on the other side IR and coupler coupled thereto disposed within the cavity length of the rectangular waveguide and arranged in the form of an open strip conductor and two loops crossing it at right angles and arranged symmetrically with respect to its a longitudinal axis, characterized in that, in order to expand the working frequency band, the length of the portion of the open strip conductor between its connection point and the nearest to the rectangular the loop hole does not exceed 0.033 AO, and the distance between the loops does not exceed 0.018 AO, where AO is the average operating wavelength. four 77 1