A Coupling Structure from Ridge Waveguide to Rectangular Waveguide
A rectangular waveguide and coupling structure technology, applied in waveguide devices, circuits, connecting devices, etc., can solve problems such as narrow coupling range, poor coupling coefficient flatness, and inability to meet broadband performance index requirements
Active Publication Date: 2020-09-01
ANHUI SUN CREATE ELECTRONICS
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Problems solved by technology
Under the premise of some limited space, the slow wave line coupling feeding structure needs to adopt the form of ridge waveguide to rectangular waveguide. The common ridge waveguide to rectangular waveguide coupling feeding structure is an inclined slot coupling feeding structure. This structure faces Problems such as poor coupling coefficient flatness and narrow coupling range cannot meet the performance index requirements under broadband working conditions
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Embodiment 1
[0032] The working frequency band of the coupling structure of this embodiment is 15 GHz-20 GHz, and the coupling degree is -11 dB. Such as figure 1 as shown, figure 1 It is a three-dimensional view of the coupling feeding structure from a ridge waveguide to a rectangular waveguide according to the present invention. The direction shown at A is the direction of the signal input port, the direction shown at B is the direction of the signal through port, and the direction shown at C is the direction of the signal through port. The direction is indicated as the direction of the coupling signal output port.
[0033] Such as Figure 2a , image 3 As shown, the ridge waveguide 1 is a single ridge waveguide, its ridge width Td=1.5mm, its narrow side Th=5mm, the side width of the ridge Tw=1.5mm, and the ridge depth Tb=4.2mm. The narrow side Ta of the rectangular waveguide 2 is 4.5 mm, the wide side Tk is 12.95 mm, and the depth dd of the coupling channel is 0.8 mm.
[0034] Such ...
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The present invention belongs to the antenna technological field and relates to a ridge waveguide-to-rectangular waveguide coupling structure. The ridge waveguide-to-rectangular waveguide coupling structure includes a ridge waveguide and a rectangular waveguide; the cavity of the ridge waveguide is communicated with the cavity of the rectangular waveguide through a coupling channel; a transmissionline passes through the middle of the ridge waveguide; the ridge waveguide is a single-ridge waveguide; two ends of the coupling channel are respectively connected with the top surface of the ridge waveguide and an end portion of the rectangular waveguide; the coupling channel is a diagonal H-shaped channel, and includes a short horizontal line-shaped slot I, a short horizontal line-shaped slot II and a connection slot; two ends of the connection slot are respectively connected with the mid-point positions of the short horizontal line-shaped slot I and the short horizontal line-shaped slot II; and the short horizontal line-shaped slot I and the short horizontal line-shaped slot II are parallel to each other. The coupling structure of the invention has good coupling coefficient flatness and large adjustable coupling coefficient, and satisfies the wide angle scanning and low sidelobe characteristics of the frequency sweep antenna.
Description
technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a coupling structure from a ridge waveguide to a rectangular waveguide. Background technique [0002] The frequency scanning antenna has the advantages of high gain, low sidelobe, wide-angle scanning, low cost, and simple structure. In recent years, it has been widely used in low-altitude search radars and ground warning radars. The frequency scanning antenna feed network generally uses slow wave lines plus coupling Feed structure, slow wave line requires low loss and high reliability. Commonly used slow wave lines include waveguide slow wave line and strip line slow wave line. Ridge waveguide to rectangular waveguide coupling feeding structure can be applied to ridge waveguide slow wave in line. [0003] Compared with the rectangular waveguide, the ridge waveguide has the advantages of wide bandwidth, low impedance, and small size. In some places where the rectangu...
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IPC IPC(8): H01P5/08
CPCH01P5/08
Inventor 胡卫东赵继明孙浩李运志
Owner ANHUI SUN CREATE ELECTRONICS