Phase dispersion compensation apparatus of waveguide array antenna feed network

A technology of dispersion compensation and antenna feeding, which is applied in the field of dispersion compensation, can solve problems such as the inability to obtain broadband phase characteristics, achieve good standing wave indicators, reduce impedance jumps and mismatches, and have a simple and compact structure

Inactive Publication Date: 2017-06-20
ANHUI SUN CREATE ELECTRONICS
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Problems solved by technology

[0003] Although the feed network is adjusted to the same phase at the center frequency, their lengths are also equal, but the phase characteristics of the broadband cannot be obtained due to the dispersion effect

Method used

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  • Phase dispersion compensation apparatus of waveguide array antenna feed network
  • Phase dispersion compensation apparatus of waveguide array antenna feed network
  • Phase dispersion compensation apparatus of waveguide array antenna feed network

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] Such as figure 1 As shown, it is a waveguide branch bridge model with a working bandwidth of 9.0-9.6GHz. It is a branch in the antenna feeding network. The four ports of the bridge are shown in the figure, P1 is the input port, P2 is the through port, P3 is the isolation port, and P4 is the coupling port.

[0026] If a section of waveguide is added, the size of the broadside becomes larger, the cutoff frequency of this section of waveguide becomes lowe...

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Abstract

The invention belongs to the technical field of dispersion compensation, in particular to a phase dispersion compensation device for a waveguide array antenna feeding network. The present invention includes a dispersion compensation unit arranged on the output arm of the straight-through port of the waveguide branch bridge. The dispersion compensation unit includes a first ladder impedance transformation section, a dispersion compensation transformation section, and a second ladder connected to the output arm of the straight-through port in sequence. The impedance transformation section and the signal output transformation section, the step impedance transformation section is used to reduce the transmission line impedance jump and mismatch caused by the sudden change of the waveguide width, effectively improving the standing wave of the port, the step impedance transformation section and dispersion compensation The transformation segments are all involved in the compensation of the dispersion phase. The invention changes the phase velocity of the electromagnetic wave in the waveguide, and cooperates with the corresponding waveguide length to well compensate the influence of the dispersion effect on the feeding network.

Description

technical field [0001] The invention belongs to the technical field of dispersion compensation, in particular to a phase dispersion compensation device for a waveguide array antenna feeding network. Background technique [0002] The anti-jamming performance requirements of modern radars are getting higher and higher, so the antenna sidelobes are required to be lower and lower. Especially for airborne pulse Doppler radar, in order to counter ground clutter interference, the requirement for the side lobe of the antenna should be less than -30 decibels, -40 decibels, or even less than -50 decibels. To obtain such a low side lobe, most slot array antennas are used, and the amplitude and phase distribution of the antenna power division network should have high precision. Therefore, how to design a power division network with high-precision amplitude and phase distribution has become a key technology. In order to reduce the mutual coupling between the antenna units and the inter...

Claims

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Application Information

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IPC IPC(8): H01Q23/00
CPCH01Q23/00
Inventor 侯艳茹胡卫东孙浩李霞
Owner ANHUI SUN CREATE ELECTRONICS
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