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A frequency selective, slot antenna technology, applied in slot antennas, antenna arrays, antennas, etc., can solve problems such as poor anti-interference ability, and achieve the effects of weight reduction, interference suppression, and large loss
Active Publication Date: 2009-10-14
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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[0009] In order to solve the problem of poor anti-interference ability of the existing waveguide slot antenna, the present invention provides a frequency-selective broadband waveguide slot th
Method used
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[0030] Example 1:
[0031] See figure 1 , image 3 , Figure 5 with Figure 6 , A preferred embodiment is a uniformly distributed 16-unit waveguide slot antenna array (five-stage filter antenna) working in the X-band, and the working frequency range of the antenna is f L ~f H , Where f L Is the lowest frequency, f H Is the highest frequency, f 0 Is the center frequency, the upper side frequency of the stop band is f S .
[0032] The antenna array consists of a radiating waveguide 1, a feeding waveguide 2, a coaxial connector 3 and a radiating slot 4, such as figure 1 Shown.
[0033] The radiation waveguide 1 is a rectangular metal ridge waveguide with internal ridges, the terminal is closed, and the metal ridge 5a is located on the center line of the bottom side, such as image 3 with 6 Shown.
[0034] The feeder waveguide 2 is also a rectangular metal ridge waveguide with closed ends and ridges inside. The metal ridge 5b is located on the center line of the bottom side, such as...
Example Embodiment
[0048] Example 2:
[0049] See figure 2 , Figure 4 with Figure 6 , Working in the X-band, uniformly distributed 16-unit waveguide slot antenna array (secondary filter antenna), on the metal ridge 5b of the feeding waveguide 2, located between the coaxial connector 3 and the coupling slots 6 on both sides, each with 3 grooves, such as figure 2 with 4 As shown, there are two short metal ridges in alternate phases, that is, a two-stage filter. The filter size and position parameters in this embodiment are preferably: L1=0.171λ 0 , L2=0.252λ 0 , W0=1.74λ 0 , W1=0.168λ 0 .
[0050] Others are the same as in Example 1.
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Abstract
The invention relates to a frequency-selective broadband waveguide slot antenna array which solves the problem that the existing waveguide slot antenna has poor capacity of resisting out-of-band interference. The frequency-selective broadband waveguide slot antenna array comprises a radiating waveguide, a feeding waveguide, a coaxial connector and a radiating slot. Both the radiating waveguide andthe feeding waveguide are rectangular metal ridge waveguide tubes with a ridge inside and terminals closed and the metal ridges are respectively positioned at the central line of the bottom edge; thecoaxial connector is positioned in the center of the lower edge of the feeding waveguide; the metal ridge of the feeding ridge waveguide between the coaxial connector and coupled slots at both sidesis symmetrically provided with more than three grooves and the overall structure of the grooves is battlement-shaped and forms two waveguide evanescent-mode filters; and the two waveguide evanescent-mode filters have the same structure and are respectively positioned on the straight waveguide sections of the two output arms of a 3dB power splitter. The frequency-selective broadband waveguide slotantenna array protects the antenna from the interference of signals out of the work frequency band and has the advantages of low loss, reduced weight, no additional equipment, high reliability and compact structure.
Description
technical field [0001] The invention relates to the structural improvement of waveguide slot resonant antenna array, in particular to a frequency-selective broadband waveguide slot antenna array. The invention can be used both for receiving and for transmitting radio waves. In military terms, it can be used as a terminal antenna for broadband, anti-jamming phased array radar systems. In civilian use, it can be used as a base station antenna for polarization diversity communication. Background technique [0002] With the rapid development of applications and requirements, the use of electromagnetic spectrum has been greatly expanded and fully applied, and it is becoming more and more crowded. On the one hand, there are more and more electronic devices working at various frequencies; on the other hand, some platforms such as ships, aircraft and satellites are limited in space; in addition, the frequency band requirements of some electronic devices are getting wider and wider...
Claims
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IPC IPC(8): H01Q13/18H01Q13/08H01Q21/00H01P1/219
Inventor 汪伟李磊张洪涛张智慧张玉梅
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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