SU1573487A1 - Disk microstrip antenna - Google Patents

Abstract

The invention relates to antenna technology and can be used as a weakly directional small-sized radiator of a phased antenna array or a stand-alone on-board antenna. The purpose of the invention is the formation of a uniform radiation pattern in the horizontal plane and a reduction in size. The disk microstrip antenna contains a dielectric substrate 1, on one side of which a metal screen 2 is located, and on the other side - a conductive disk 3, in which a slit 4 is made, a pin probe 5, a coaxial feeder 6, a conductive short connector 7. The slit 1 is in the form a circle whose center coincides with the center of the conductive disk 3 and a rectangular shaped slot located along the radius of the conductive disk 3. The pin probe 5 is connected at one end to the outer edge of the conductive disk 3, and at the other ends is connected to internal conductor The coaxial feeder 6, the outer conductor of which is connected to the metal shield 2. The conductive short connector 7 is made in the form of a thin rectangular plate with a length equal to the length of the slot of the rectangular shape and installed along its edge. Disk microstrip antenna ensures the formation of a uniform radiation pattern in the horizontal plane and a decrease in horizontal dimensions compared with the prototype by 2-4 times. 2 Il.

Description

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The invention relates to antenna technology and 8 can be used as a weakly directional small abaritic radiator of a phased antenna array or an independent onboard antenna.

The purpose of the invention is to correct a uniform radiation pattern S of a horizontal plane and reduce its size.

FIG. 1 shows a Microstrip Disk Antenna (MPA) section | ez; in fig. 2 - the same, top view; FIG. 3 - section A-A- in FIG. 2.

The Diskov MPA contains a dielectric | substrate 1, on one side, to | which the metallic eH2 2 is located, and on the other side - a conductive disk 3, in which the slit 4, a pin probe 5, a coaxial feeder 6, is made into the single short circuit 7 "Wire - Ziy disk 3 is made with radius A

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 (0,04-0,09) - ™, where b0 - length

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waves in free space; Ј is the relative dielectric projectivity of the dielectric substrate 1. Slot 4 is made in the form of a circle of radius B 0.8A, the center of which coincides with the center of the conductive disk 3, and a rectangular shaped slot extending along the radius of the conductive disk 3, and the slots of the straight-carbon form are equal to the difference of the radii of the conductive disk 3 and the circle of the slit 4, and the width is C (0,, 5-1.0) H, where H is the thickness of the dielectric substrate 1.

The pin probe 5 is connected at one end to the outer edge of the conductive disk 3, and the other end is connected to the internal conductor of the coaxial fi-Dera 6, the external conductor of which is connected to the metal shield 2. The conductive short connector 7 is made in the form of a thin rectangular plate with a length of equal to the slit length of the rectangular slit 4 and installed along its edge. Pin probe 5 is installed with an offset from the axis of symmetry of the slot pr - large-shaped slit 4 at an angle if0 and 60. The thickness of the dielectric substrate H (0.1-0.2) A.

Diskova MLA works as follows.

The power to pin probe 5 is fed through coaxial feeder 6 through a coaxial-strip junction.

The dimensions A and B of the conductive disk 3 determine mainly the smallest resonant frequency of the disk MPA. Making a slot of a rectangular slit 4, using a conductive short-circuit switch 7 and placing the pin probe 5 at the outer edge of conducting flncka 3 make it possible to form an electromagnetic field distribution in the internal volume of the MPA resonator that ensures uniformity of the radiation pattern in the horizontal plane and a decrease in the resonance frequency compared to the known

more than twice. An increase in the B / A ratio leads to a decrease in the resonant frequency. The angular displacement Cf0 of the point of connection of the pin probe 5 relative to the axis of symmetry of the slot

the rectangular shape of the slit 4 practically does not change the resonant frequency of the disk MPA, but affects the nature of the frequency (the dependence of the input resistance: as cf0 increases

active input component

tivleni. The pattern of magnetic current distribution along the perimeter of the disk MPA does not change, which causes the directional characteristic invariance in the horizontal plane with respect to the angular coordinate fo.

Thus, the proposed disk MPA ensures the formation of a uniform radiation pattern in the horizontal plane and a decrease in the horizontal dimensions as compared with the known antenna in 2-4 times.

The invention formula is a disk microstrip antenna containing a dielectric substrate, on one side of which there is a metal screen, and on the other side there is a conductive disk, a whip probe, one end of which is connected to a conductive disk and the other is connected to an internal conductor of a coaxial feeder, the external conductor of which connected to a metal screen; a conductive shorting device connecting the conductive disk with a metal screen; a slot is made in the conductive disk;

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Editor N.Lazarenko

Order 1644

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

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Compiled by Y. Volkov Tehred L. Serdyukova

Proofreader S. Shekmar

Circulation 448

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Claims (1)

Claim A microstrip disk antenna containing a dielectric substrate, on one side of which there is a metal shield, and on the other a conductive disk, a pin probe, one end of which is connected to a conductive disk, and the other is connected to the inner conductor of the coaxial feeder, whose outer conductor is connected to the metal screen a conductive short circuit connecting the conductive disk to a metal screen, while in a conductive manner. there is a slot in the disk, I distinguish 5 I mean that, in order to form a uniform radiation pattern in the horizontal plane · and reduce the dimensions, the conductive disk is made with a radius of A = (0.04 0.09) where - wavelength in free space; - the relative permittivity of the dielectric substrate, the gap is made in the form of a circle with a radius of B 6 0.8 A, the center of which coincides with the center of the conductive disk and the rectangular slot is located. ^z along the radius of the conductive disk, and the length of the slot of a rectangular shape is equal to the difference between the radii of the conductive disk and the circle of the slit, and the width is C = (0.5-1.0) N, where H is the thickness of the dielectric substrate, the conductive short circuit is made 10 in the form a thin rectangular plate with a length equal to the length of the slot of a rectangular shape and installed along its edge, and the pin probe is connected to the outer edge of the sagging disk.