Waveguide series-feed network capable of realizing arbitrary power-dividing ratio

Abstract

The invention relates to a waveguide series-feed network capable of realizing arbitrary power-dividing ratio. A plurality of microstrip probes are inserted into the broad-side center line of a rectangular waveguide at intervals, and energy coupled from the waveguide by the probes can be changed by adjusting the extension lengths of the microstrip probes into the rectangular waveguide, so as to realize arbitrary power-dividing ratio. Strong reflection which can be aroused when the microstrip probes are inserted into the rectangular waveguide can be canceled through adjusting the sizes of tuning blocks, and the tuning blocks are symmetrically placed at corresponding positions near the microstrip probes and clung to two broad sides of the waveguide, so that transmission of traveling waves of a master mold in the waveguide can be ensured. The waveguide series-feed network provided by the invention can be connected with microstrip feed networks, coaxial feed networks, stripline feed networks, suspended stripline feed networks, coplanar waveguide feed networks and other feed networks, the functions of simplifying the structure of the whole feed networks and lowering the loss of the feed networks can be performed, and the waveguide series-feed network can serve as a feed network of a higher-frequency large-scale microstrip array antenna.

Description

technical field [0001] The invention relates to a waveguide series feed network capable of realizing any power division ratio, which can be used as a feed network of a large-scale microstrip array antenna with relatively high frequency. Background technique [0002] In recent years, planar antennas have met the development trend and requirements of modern radio systems due to their low profile, miniaturization, and ease of integration, and thus have been widely used. [0003] As a kind of planar antenna, the microstrip array antenna is more and more widely used in various fields such as airborne and spaceborne due to its advantages of easy control of aperture distribution, compact structure, light weight, easy processing, and low cost. Generally, microstrip antennas use microstrip lines, striplines, and suspended striplines as the main feed network. However, as the frequency increases, the parasitic radiation and dispersion effects of these microstrip network feeders become...

AI Technical Summary

Problems solved by technology

However, the metal waveguide cannot be directly used as the feeding network of the microstrip antenna, so a feeding network is needed to combine the waveguide and the network such as the microstrip line well, thereby reducing the loss of the feeding network and improving the performance of the microstrip array antenna. Radiation efficiency

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