RU191904U1 - Broadband Microstrip Dipole Antenna - Google Patents

Abstract

The utility model relates to radio engineering and can be used in radar, radio navigation, communications, antenna systems and radio measurements, both as an independent antenna and as a basic radiating element in printed phased antenna arrays. Broadband microstrip dipole antenna contains a symmetric dipole with two radiating arms, a slot, a power line, placed on a dielectric substrate. In this case, the dipole arms are provided with additional rectangular conductive segments located above the radiating dipole arms at a distance equal to at least one thickness of the substrate. The technical result consists in expanding the operating frequency band. 1 s.p. f-ly, 4 ill.

Description

The proposed broadband printed dipole antenna relates to radio engineering and can be used in radar, radio navigation, communications, antenna systems and radio measurements, both as an independent antenna and as a basic radiating element in printed phased antenna arrays.

A known design of a monopole antenna (patent US 006788295 B2, IPC H01Q 9/00) containing an elliptical emitter having a triangular cross-sectional shape parallel to the minor axis of the ellipse, with one or two rectangular cutouts parallel to the major axis of the ellipse, a coaxial cable or matching device from the strip line, exciting the antenna. In this case, the radiating element is bent either in the direction of radiation or against the direction of radiation of the monopole antenna with the formation of a dihedral angle symmetrically with respect to the small axis of the ellipse, thereby achieving simplicity of manufacture and ease of adjustment of input impedances due to changes in the bending of the antenna element together with the area of the cutouts, ease of integration into radio engineering systems. Significant disadvantages of this antenna are a small bandwidth (not more than 10% of the carrier frequency) and a low coefficient patient's gain in the operating frequency band.

Closest to the proposed antenna is a microstrip dipole antenna, the dipole shoulders of which are made on one side, and the feeding element in the form of a strip is made on the other side (Patent CLLJA N 3845490, CL 343-821, 1974.). However, the known antenna has a narrow bandwidth.

The utility model aims to increase bandwidth.

The technical result achieved by the implementation of the utility model is the addition of microstrip segments to the composition of the dipole antenna, which allows to expand the operating frequency band.

The technical result is achieved due to the fact that the broadband microstrip dipole antenna containing a symmetrical dipole with two shoulders, a slot, a power line placed on a dielectric substrate, characterized in that the shoulders have an additional set of N conductive segments with a certain surface shape and are located above the radiating dipole shoulders at a distance equal to not less than one thickness of the substrate.

A broadband microstrip dipole antenna containing a symmetrical dipole with two radiating arms, a slot, a power line placed on a dielectric substrate, characterized in that the dipole arms are provided with additional rectangular conductive segments located above the radiating arms of the dipole at a distance equal to not less than one substrate thickness.

Adding additional microstrip electrically conductive segments located at a distance of one thickness of the substrate above the dipole antenna in the direction of its radiation, with sizes different from the microstrip shoulders of the dipole, allows you to expand the operating frequency band.

The invention is illustrated by figures, which depict:

- in FIG. 1 is a preferred version of the topology of the proposed broadband dipole antenna with added segments, implemented on a dielectric substrate with a relative dielectric constant of 4.4 and a thickness of 1 mm; top view, where 1 is the antenna input, 2 is the microstrip resonator, 3 are additional conductive segments, 4 is the power line, 5 is the slot.

- in FIG. 2 is a graph of the SWR versus frequency;

- in FIG. 3 is a graph of gain versus frequency, expressed in decibels;

- in FIG. 4 is a graph of the radiation pattern at the center frequency (2600 MHz).

The broadband microstrip dipole antenna has one 50-ohm input power line on one side of the substrate, consists of a microstrip resonator with two arms and two electrically conductive segments located at a certain distance from these arms.

Broadband microstrip dipole antenna operates as follows. Using a coaxial line, energy is supplied to a conducting power line 4 (for example, with a working frequency of 2.6 GHz), energy flowing along this line excites a resonator, emits an electromagnetic wave through slot 5 and the shoulders of the dipole (during transmission). Due to the use of additional electrically conductive segments located at a certain distance from the dipole, the expansion of the working frequency band at the level of SWR = 2 is ensured. Due to the excitation of these electrically conductive segments and their additional emission of electromagnetic waves. A similar implementation of a broadband microstrip dipole antenna is shown in FIG. 1. The use of additional electrically conductive segments in the design of a dipole antenna allows for the effective expansion of the operating frequency band. To confirm the correctness of the selected technical solution, a useful model of the proposed antenna was simulated, which obtained the following technical characteristics:

- operating frequency band 73.8%, according to the SWR level = 2, in accordance with the data in FIG. 2;

- gain in the frequency band of at least 5 dB, in accordance with the data in FIG. 3;

The area of the proposed antenna 5250 mm ² .

Claims (2)

1. Broadband microstrip dipole antenna containing a symmetrical dipole with two radiating shoulders, a slot, a power line placed on a dielectric substrate, characterized in that the shoulders of the dipole are equipped with additional conductive segments of a rectangular shape located above the radiating shoulders of the dipole at a distance equal to not less than one thickness of the substrate. 2. Broadband microstrip dipole antenna according to claim 1, characterized in that the conductive segments are located symmetrically with respect to the axis of the longitudinal direction of the slit.

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