Medium loading type period groove slot antenna
A medium-loaded, slot antenna technology, applied to slot antennas, circuits, etc., can solve the problem of large antenna aperture, achieve the effects of small aperture size, increased gain, and enhanced antenna performance
Inactive Publication Date: 2012-07-04
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a medium-loaded periodic groove slot antenna to reduce the antenna diameter in view of the problem that the period of the groove structure in the traditional periodic groove slot antenna approximates the wavelength, so that the antenna aperture is relatively large. At the same time, the radiation performance of the slot antenna is improved
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[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the following examples, but should include all content in the claims. Moreover, those skilled in the art can realize all the content in the claims from the following embodiment.
[0024] The implementation process of the present invention will be further described below through the examples.
[0025] (1) Select the working frequency of the slot antenna as 14.5GHz, and its wavelength can be obtained as 20.69mm;
[0026] (2) Select the metal plate material as aluminum;
[0027] (3) A metal gap with a size of 10.10mm×1.5mm is opened in the center of the metal plate as a radiation source. At this time, the thickness of the metal only needs to be greater than the depth of the groove to meet the actual processing requirements. And when the gap length is 13.5mm, according to ...
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The invention relates to a medium loading type period groove slot antenna. Firstly, the working frequency f of the antenna is determined; secondly, a metal plate material is selected; thirdly, the central area of the metal plate is provided with a metal slot structure with the length of S1 and the width of sw, and a waveguide structure serving as an excitation source is put under the metal plate to excite the metal slot; and finally, the emergent surface of the metal plate is provided with a plurality of period groove structures symmetrically, the period of the grooves is p, the depth is d, the width is w, the distance between a first groove and the center of the metal slot is p1, and a medium with the dielectric constant of epsilon and the thickness of t is loaded between adjacent metal grooves. Compared with the traditional period groove slot antenna, the medium loading type period groove slot antenna utilizes the loaded medium to reduce the aperture size of the antenna, more surface energy can be excited effectively, and the energy radiated to the free space is increased, so the radiation performance of the antenna is further improved; and particularly, beam angles on the E surface and the H surface are compressed greatly, and the directivity is obviously strengthened.
Description
technical field [0001] The invention relates to a design method of a slot antenna with high radiation performance, in particular to a medium-loaded periodic groove slot antenna. Background technique [0002] Recently, scholars such as H.J.Hezec reported that loading a one-dimensional or annular groove structure around a subwavelength aperture can produce directional beams with anomalous transmission and narrow beam angles, which has aroused widespread interest of researchers. Subsequently, relevant theories and applications emerged, and most scholars attributed the physical mechanism of the above-mentioned strange phenomenon to the enhancement of surface plasmon resonance excitation and the far-field diffraction of surface plasmon waves, and extended this surface groove structure to terahertz , the microwave band. In the microwave band, people first verified the existence of abnormal transmission and beaming effects after loading the trench structure. In the field of anten...
Claims
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IPC IPC(8): H01Q13/10
Inventor 冯沁黄成崔建华赵泽宇罗先刚
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI