A Broadband Dual Linear Polarized Tapered Slot Antenna

Abstract

The invention relates to a broadband dual-linear polarization cone chopping groove antenna; a cone chopping groove radiating paste with a parasitic element and an inclined side is established; a series of metallic via holes are arranged at outline edges of the index line of the cone chopping groove antenna and a feed microstrip line; moreover, two linear polarized cone chopping groove antenna units are aligned according to T-shaped structure with disconnected middle part, so as to form a dual-line polarized antenna. The broadband dual-linear polarization cone chopping groove antenna has the property of wide wave beam of the broadband, and can eliminate the standing wave distorted point caused by resonance in scanning the wide angle of the broadband.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a broadband double-line polarized tapered slot antenna. Background technique [0002] The tapered slot antenna is a kind of non-resonant antenna, which has the advantages of wide frequency band, unidirectional radiation, simple structure, easy processing, light weight and low cost. In 1979, Mr. P.J.Gibson proposed the tapered slot antenna (Vivaldi) antenna with exponential line gradient. This antenna has the advantages of low sidelobe, moderate gain, and adjustable beam width. This antenna has received extensive attention since its birth. It is widely used in microwave fields such as satellite communication and bottom-penetrating radar. At present, broadband dual-polarized tapered slot antennas are used as antenna units, mainly used in communication base stations and active phased array radars; microstrip dipoles and patch antennas can also be used as unit antennas, but tapered s...

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Problems solved by technology

[0003] In the patent "A Vivaldi Printed Antenna with Ultra-Wideband Dual Polarization Characteristics" (publication number: CN203826551U), Changzhou Jihe RF Electronics Technology Co., Ltd. proposed a double-sided printing that couples two microstrip lines for feeding Vivaldi antenna unit, the method of crossing to form a dual-polarized antenna; comb-shaped unequal-length corrugations are loaded on the flanks of the exponentially changing metal patch to improve the impedance bandwidth; comb-shaped chokes are also loaded on the tail of the antenna radiation patch grid to reduce the backward radiation and increase the antenna gain; although this approach increases the antenna gain, it also narrows the beam width accordingly. big drop

[0004] East China Normal University in the patent application "Multi-band Broadband Gradient Slot Antenna and Orthogonal Dual Polarization Broadband Gradient Slot Antenna" (publication number: CN105514588A), has a dual-band central antenna part with a gradient slot structure, and a dual The low-frequency peripheral antenna part of the slot line radiation structure forms a whole, which expands the bandwidth of the antenna; and the two element antennas are orthogonally crossed, which solves the conflict that the thickness of the dielectric substrate is greater than the width of the slot line, and reduces the two poles. The influence of mutual coupling between polarized antennas; this approach has improved the mutual coupling problem between the two polarized units; but it does not consider that when the antennas form a large planar array for wide-bandwidth angular scanning, resonance will occur at some frequency points, Distortion points appear in the standing wave, and the problem of severe impedance mismatch

[0005] In August 2012, the "Journal of Microwave Science" published the document "Research on a Multifunctional Broadband Dual-polarization Phased Array Antenna", which rotates the exponentially tapered slot into a body to form a dual-polarization antenna; although this method reduces the number of elements The input impedance and mutual coupling of the antenna, but it also increases the volume and weight of the unit antenna, which is not suitable for environments with strict weight and volume requirements such as space-borne missiles

[0006] The document "An Improved V-shaped Gradient Slot Antenna" published in "Acta Microwave Sinica" in March 2004 changed the sudden change at the end of the traditional V-shaped tapered slot antenna to a gradual change; this method reduces the discontinuity at the end of the antenna and suppresses the The propagation of the surface wave effectively reduces the sidelobe level of the antenna; however, due to the structural limitation of the V-shaped tapered slot antenna, the beam width is still relatively narrow, which is not suitable for wide-angle phased scanning

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