Low-profile high-gain ultra-wideband planar spiral antenna
A planar spiral, high-gain technology, applied in the field of communication, can solve the problems of insufficient gain, insufficient size, and insufficient bandwidth of the planar spiral antenna, so as to achieve the effect of expanding the radiation bandwidth, reducing the standing wave ratio, and avoiding the effect of capacitance and inductance
Inactive Publication Date: 2017-11-21
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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[0005] The purpose of the present invention is to provide a low-profile high-gain ultra-wideband planar helical antenna for the problems of insufficient bandwidth, insufficient gain, and insufficient size of the planar helical antenna, which has low profile, high gain, ultra-wideband, and circular polarization. , miniaturization and other characteristics
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[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.
[0023] This embodiment provides a low-profile high-gain ultra-wideband planar helical antenna, and its three-dimensional structure schematic diagram is as follows figure 1 as shown, figure 2 for with figure 1 The corresponding front sectional view can be seen from the figure that the low-profile high-gain ultra-wideband planar helical antenna in this embodiment includes a radiator 1, a back cavity 2, a feeding balun 3 and a feeding connector 4; wherein, the radiator 1 includes a dielectric The substrate 12 and the planar helix 11, the center of the dielectric substrate 12 is provided with...
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The invention belongs to the technical field of communication, and provides a low-profile high-gain ultra-wideband planar spiral antenna, which is used to overcome such problems of the conventional planar spiral antenna as a small bandwidth, low gain and a large size. The low-profile high-gain ultra-wideband planar spiral antenna comprises an antenna radiator, a back cavity, a feed balun, and a feed connector, wherein a metal hollow circular truncated cone is arranged in the back cavity and located on a dielectric bottom plate, the central axis of the metal hollow circular truncated cone coincides with the central axis of the back cavity, the vertical distance between a random position on the side surface of the metal hollow circular truncated cone and the antenna radiator meets the relation lambda / 4, and lambda is the operating wavelength of the antenna radiator for vertical projection of the position on the side surface to a corresponding position of the antenna radiator. The low-profile high-gain ultra-wideband planar spiral antenna provided by the invention has the advantages of low profile, high gain, ultra wideband, circular polarization, miniaturization and the like; and the operation frequency is extended to range from 2Ghz to 40Ghz, the bandwidth ratio is 20 to 1, and the average gain reaches 6.5dBi.
Description
technical field [0001] The invention belongs to the technical field of communication, relates to an ultra-wideband planar helical antenna, and specifically provides a low-profile, high-gain, ultra-wideband planar helical antenna. Background technique [0002] With the development of communication technology, various electronic devices have occupied most of the frequency band; with the emergence of broadband systems, antennas are required to have broadband or even ultra-wideband characteristics. At the same time, with ultra-wideband communication, radar, imaging With the development of other fields, it is necessary to design miniaturized or even ultra-miniature UWB antennas. [0003] At present, the types of antennas with ultra-wideband performance mainly include horn antennas, parabolic antennas, Vivaldi antennas, log-periodic antennas, fractal antennas, etc. Compared with these ultra-wideband antennas, planar helical antennas exhibit stable input impedance and small Polari...
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Login to View More IPC IPC(8): H01Q1/50H01Q7/00H01Q15/14
CPCH01Q1/50H01Q7/00H01Q15/14
Inventor 张怀武笪策杨青慧苏桦吴同庆
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA