Medium loaded type groove gap waveguide end antenna
A medium-loaded, slotted waveguide technology, applied to slot antennas, circuits, etc., can solve the problems of low aperture efficiency and low gain, and achieve the effect of increasing gain and increasing aperture utilization
Active Publication Date: 2012-12-12
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: aiming at the deficiencies such as low aperture efficiency and low gain of the existing miniaturized trench and slot antennas, the present invention proposes to symmetrically load the edges of the metal plates on both sides of the slot feed source with high dielectric constant Medium, use it to reflect more surface energy to participate in space radiation, under the joint action of the groove and the medium on the radiated energy, further increase the gain of the antenna and increase the aperture utilization of the antenna
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[0024] Embodiment: First, the operating frequency of the groove slot waveguide end antenna is selected as required to be 14.5 GHz, that is, the operating wavelength λ is about 20.7 mm; the metal plate length l1 of the antenna is determined to be 36 mm, the width w1 is 42 mm, and the height h1 is 4 mm ; The antenna adopts the slot dipole resonance mode, the slot length is approximately 1 / 2 resonance wavelength, the initial value of the length l2 is set to 9.8mm, and the default initial value of the width w2 is set at 0.1λ-0.005λ (2.07mm-0.1mm) as Through simulation, it can be found that the slot width has no obvious influence on antenna performance parameters such as the center frequency, bandwidth, gain, and directional coefficient of the antenna. Therefore, this embodiment chooses a size of 2.0 mm, which is easy to process in practice; A groove g is loaded, and the length direction of the groove is perpendicular to the resonance direction of the electric field of the slot feed...
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The invention provides a novel medium loaded type groove gap waveguide end antenna. The antenna comprises a ground plate, a gap feed source, symmetrical surface grooves of both ends of the gap and a high dielectric constant medium loaded on the edge of the ground plate. The working principle is different from traditional artificial groove structure suppressing surface waves, more surface waves can be inspired, and the distribution of surface energy can be changed at the same time to make the energy near the grooves relatively larger. The loaded high dielectric constant medium reflects more surface energy to be involved in space radiation, thereby further enhancing the gain of the antenna, and increasing the aperture utilization ratio of the antenna. The antenna has the characteristics ofhigh gain, high aperture efficiency, miniaturization, and the like under the common action of the grooves and the medium, and has potential application values in the field of wireless communication.
Description
technical field [0001] The invention relates to an antenna, in particular to a miniaturized, high-performance medium-loaded groove slot waveguide tip antenna. Background technique [0002] The development of microwave and millimeter-wave communication systems increasingly relies on miniaturized, high-performance, and low-cost antennas. In recent years, a new type of periodic groove structure has been reported in the optical band. When it surrounds the subwavelength small hole, it can produce anomalous transmission and beaming effects. H.J.Lezec et al. attributed the phenomenon to surface plasmons resonance excitation. Subsequently, the trench structure was amplified to longer wavelengths, and it was verified through experiments that the introduction of the trench structure in the microwave band can also produce corresponding phenomena, especially the beaming characteristics have further stimulated the application of this structure in the field of antennas. In fact, the tre...
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IPC IPC(8): H01Q13/10
Inventor 罗先刚赵泽宇冯沁黄成崔建华
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI