Planar antenna for inhibiting side lobe level by utilizing choke groove
A flat-panel antenna and sidelobe level technology, which is applied in the field of communication flat-panel antennas and flat-panel antennas, can solve the problems of complex design and processing technology, difficulty in network access, low utilization rate, etc., and achieve simple structure and processing technology, sidelobe suppression, The effect of method simplification
Inactive Publication Date: 2013-12-25
SHANDONG GUOWEI SHUNTAI SATELLITE COMM
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Problems solved by technology
The traditional waveguide-fed cavity-backed panel antenna adopts the cascade connection of equal-power splitters and anti-phase power splitters to form a feed network, and feeds the antenna elements with equal amplitude and same phase. The antenna has high efficiency, but the first side lobe level and near The side lobe level envelope of the area cannot meet the requirements of Satcom
This also directly leads to the difficulty of accessing the network and the low utilization rate of flat-panel antennas in satellite communication systems.
The current method of controlling the side lobe level is mainly to use a specific aperture distribution to achieve side lobe control. The advantage of this method is that the side lobe level can be controlled within a wide range, but the design and processing technology are more complicated.
Method used
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Embodiment
[0021] In this embodiment, the panel antenna according to the present invention is used to receive a signal with a wavelength of λ=24mm.
[0022] A panel antenna utilizing a choke slot to suppress side lobe levels, comprising a panel antenna body 1, a choke slot 2 is arranged on the edge of the panel antenna body 1, and the length of the choke slot 2 is the same as that of the panel antenna side lengths are the same. The depth of the choke groove 2 is (1 / 4)λ, and the λ is the wavelength of the antenna signal received by the panel antenna, that is, the depth of the choke groove 2 is 6mm.
[0023] The width of the choke groove ≤ (1 / 10) λ, the λ is the wavelength of the antenna signal received by the panel antenna, the depth of the choke groove here is 0.5mm, but the depth of the choke groove of the present invention is not Limited to 0.5mm.
[0024] Figure 6 It is a comparison diagram of the side lobe level of the existing panel antenna without choke slot and the panel anten...
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The invention relates to a planar antenna for inhibiting a side lobe level by utilizing a choke groove. The planar antenna comprises a planar antenna body, wherein the edge of the planar antenna body is provided with the choke groove; the depth of the choke groove is (1 / 4) lambda, and the lambda is the wavelength of an antenna signal received by the planar antenna; the width of the choke groove is less than or equal to (1 / 10) lambda, and the lambda is the wavelength of the antenna signal received by the planar antenna. The planar antenna for inhibiting the side lobe level by utilizing the choke groove, which is disclosed by the invention, is simple in structure and processing process. Compared with a method for controlling the side lobe level through aperture distribution, the planar antenna disclosed by the invention is much more simplified. Compared with the planar antenna without the choke groove, the planar antenna disclosed by the invention is obviously inhibited in side lobe.
Description
technical field [0001] The invention relates to a planar antenna which utilizes a choke groove to suppress side lobe levels, and belongs to the technical field of communication planar antennas. Background technique [0002] The waveguide slot radiation antenna, compared with the traditional common reflector antenna, has good mechanical strength, high radiation efficiency, compact antenna structure, low antenna feed loss, good power capacity and other advantages. At present, flat panel antennas are widely used due to their small size, convenient portability, and high efficiency. [0003] Considering the interference from adjacent satellites, the flat-panel antennas for satellite communications have strict requirements on the level envelopes of side lobes and near-field side lobes. The traditional waveguide-fed cavity-backed panel antenna adopts the cascade connection of equal power splitters and anti-phase power splitters to form a feed network, and feeds the antenna element...
Claims
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Inventor 吴超唐文成杨猛
Owner SHANDONG GUOWEI SHUNTAI SATELLITE COMM