Four-unit-interconnected dipole-structure loop antenna array for electric small-spacing direction finding
A technology of symmetrical oscillators and antenna arrays, applied in the directions of antenna arrays, antennas, electrical components, etc., can solve problems such as inapplicability, and achieve the effects of improving changes, improving sensitivity, and increasing electromagnetic coupling.
Active Publication Date: 2017-02-22
XIAMEN UNIV
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Problems solved by technology
[0007] The direction-finding antenna structure involved in the above three patents, although considering factors such as miniaturization and simple structure, is not suitable for space-constrained platforms or low-frequency bands
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[0025] The present invention provides an electrically small-pitch symmetric dipole array antenna structure based on dipole interconnection. In order to make the purpose, technical solution and advantages of the present invention clearer, 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, not to limit the present invention. The specific implementation steps are as follows:
[0026] 1) Take the symmetric dipole array antenna with a diameter of 0.1λ as an example
[0027] 2) Its parameters are set so that the element antenna is in the xOy plane, such as figure 1 As shown, four antennas with symmetrical vibrator structure with the same material and size: Antenna Unit 1, Antenna Unit 2, Antenna Unit 2, and Antenna Unit 4 are centered on the origin, the operating frequency is 1GHz, and the co...
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The invention discloses a four-unit-interconnected dipole-structure loop antenna array for electric small-spacing direction finding and relates to array antennae. The four-unit-interconnected dipole-structure loop antenna array for electric small-spacing direction finding comprises four dipole-structure antennae and two antenna connection segment structures, wherein the four dipole-structure antennae are evenly distributed in a circular array mode. Upper and lower structures of each of four dipoles are connected directly through the corresponding antenna connection segment structure, electric small spacing refers to that spacing between every two adjacent units is far smaller than operating wavelength, a radiating unit comprises four dipole structures made of same materials and identical in size, and the four dipole structures are disposed on a reference plane parallelly and are evenly distributed in a circular array mode at intervals by uniform angles. The upper half portions of the four dipole structures are directly connected through the antenna connection segment structures, the lower half portions thereof are directly connected through the same antenna connection segment structures, and the antenna connection segment structures are formed by connection of four-segment cylinder structures according to a regular quadrangle and are made of metal materials as same as those of dipoles in diameter.
Description
technical field [0001] The present invention relates to array antennas, in particular to an electrically small-pitch array antenna design for super-resolution estimation of arrival angle (Direction of Arrival, DOA). Background technique [0002] Spatial spectrum estimation is used to solve the problem of spatial energy distribution of received signals, so as to determine the number of signals or the direction of arrival of signals [1,2]. Direction of arrival estimation is also known as angle of arrival estimation [3]. Direction of arrival estimation is concerned with finding the position of a radiation source in space. Generally speaking, direction of arrival estimation mainly includes two aspects: (1) determining the number of radiation sources in space; (2) determining the spatial position of each radiation source. With the development of direction finding technology, many methods have been developed for different problems. Direction finding technology can be divided in...
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Login to View More IPC IPC(8): H01Q1/36H01Q1/50H01Q21/00
CPCH01Q1/36H01Q1/50H01Q21/00
Inventor 刘颜回马欣宇姚志会邓丽丽朱春辉柳清伙
Owner XIAMEN UNIV