Broadband waveguide power divider

Abstract

The invention discloses a broadband waveguide power divider. The broadband waveguide power divider comprises a lower layer of radiating waveguide; an upper layer of waveguide comprises a coupling waveguide and a power dividing waveguide; the radiation waveguide comprises a radiating waveguide wall and a plurality of isolated radiating waveguide cavities; the coupling waveguide comprises a coupling waveguide wall, and a plurality of isolated coupling waveguide cavities, coupling isolation blocks and secondary power distribution blocks; the power dividing waveguide comprises a power dividing waveguide wall, a trunk waveguide cavity, a branch waveguide cavity, a primary power distribution block, a primary impedance matching block and a secondary impedance matching block; the overlapping part of upper and lower layers of waveguide walls is called a public wall of the upper layer and the lower layer, a plurality of linear coupling slots are formed in the overlapping part, the arrangement directions of the linear coupling slots are the same as those of the radiating waveguide cavities and are the same as the linear directions of the linear coupling slots; and the linear coupling slots overlap along a virtual center line of the linear direction. Compared with an existing waveguide power divider, the broadband waveguide power divider has the advantages that original narrow-band inclined coupling slots of a series structure are replaced with broadband horizontal linear coupling slots of a parallel structure, and the width of a working band is expanded to over 20% from below 10%, that is to say, the bandwidth is improved by more than one time.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a broadband waveguide power divider. Background technique [0002] The waveguide power splitter is an important microwave passive device, which is widely used in the feeder network of waveguide slot array antennas and other fields. Its function is to divide one input electromagnetic power signal into two or Two or more electromagnetic wave power signals are superimposed and output from one, which has the advantages of small loss and large power capacity. [0003] In many literatures or professional books, the design method of the feeder network of the planar slot array antenna is introduced. For example, Gu Weijun published in the second issue of "Modern Radar" in 2012 "Design and Bandwidth Analysis of the Plane Slot Antenna Subarray Excitation Device" This paper introduces various subarray excitation device models commonly used at home and abroad. These models are composed o...

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Problems solved by technology

[0004] These existing power divider models have the following disadvantages: First, because the excitation energy of the coupled waveguide to the radiation waveguide is realized through the coupling slots, these inclined and staggered coupling slots are narrow-band, and the relative frequency bandwidth is less than 10%. When these coupling slits are connected in series, the frequency band will be further reduced, which will seriously limit the range of use of the antenna; secondly, because the half-waveguide wavelength of the coupling waveguide is related to the width of the radiation waveguide, the width of the coupling waveguide is relatively large. For example, in the X-band, it is usually more than 20mm. Such a coupling waveguide with a large width will increase the difficulty of designing the feeder network of the flat panel antenna and the design of the antenna support structure. When the antenna rotates at a large angle, it will also interfere with the scanner, affecting the Antenna Scanning Capabilities

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