KR200334061Y1 - Dual polarization omnidirectional antenna - Google Patents

Abstract

The present invention relates to an omni directional antenna used in a mobile communication base station (TRS, CELLULAR, PCS, IMT-2000, ISM-Band).

According to the present invention, after forming a patch antenna pattern on the entire surface of a dielectric substrate having a metal film, the dielectric substrate is rolled round to form a sleeve dipole, thereby implementing an omnidirectional dual polarization antenna.

The dual polarized omnidirectional antenna according to the present invention can minimize the characteristics of the upper side lobe, which is the cause of interference between adjacent base stations, and since the antenna pattern is formed on the dielectric substrate, the antenna has uniform characteristics by simplifying the manufacturing process. It is possible to do, and there is an effect that can reduce the size and weight of the antenna.

Description

Dual polarized omnidirectional antenna {DUAL POLARIZATION OMNIDIRECTIONAL ANTENNA}

The present invention relates to an antenna technology used in a mobile communication base station (TRS, CELLULAR, PCS, IMT-2000, ISM-Band). will be.

Signals transmitted from conventional mobile communication base stations and terminals cause many modifications due to the buildings in the city center and the surrounding environment. These altered signals directly affect the call quality. This problem is often referred to as a fading phenomenon, and its root cause may be a problem in propagation path.

Diversity is mainly used for the purpose of solving fading by multipath. Diversity technique is a method to solve the fading phenomenon by receiving and properly combining a plurality of signals affected by the fading independently of each other. There are various types of diversity techniques, but the representative ones are the spatial diversity technique and the polarization diversity technique. In the present invention, the fading phenomenon is solved by using a polarization diversity technique.

FIG. 1 is an embodiment of a vertically polarized omnidirectional antenna for a repeater, which is used in the related art, and is an antenna of a type in which a circular enclosed rod is manufactured as a radiation element of 0.25λ.

FIG. 2A is a front view of a vertically polarized omnidirectional antenna for a repeater using a dielectric substrate, and FIG. 2B is a side view of a vertically polarized omnidirectional antenna for a repeater using a dielectric substrate. FIG. It is manufactured in a structure that cannot be arranged.

3 is a cross-sectional view of a vertically polarized omnidirectional antenna for a base station, which is conventionally used. The antenna is manufactured by processing a metal material such as copper or aluminum, and then connecting a plurality of radiating elements to a feed line to form a radiating element and a feeding part. The lower the frequency, the larger the size of the radiating element, so the weight of the antenna increases, and the higher the frequency, the smaller the size of the radiating element, which is inconvenient to be precisely processed. In addition, since the assembly of the radiating elements must all proceed manually, there is a problem in that the antenna characteristics are not uniform because productivity is reduced because the assembly takes a lot of time, and the product is produced by hand.

The present invention has been made to solve the above-mentioned problems, simplifying the manufacturing process, mass production of antennas with uniform characteristics, miniaturization and lightening of antennas, and resolution of fading by using diversity techniques. The purpose is to improve.

Figure 1 is an embodiment of a vertically polarized omnidirectional antenna for a repeater used in the prior art.

2A is a front view of a vertically polarized omnidirectional antenna for a repeater using a conventional dielectric substrate.

Figure 2b is a side view of a vertically polarized omnidirectional antenna for a repeater using a conventional dielectric substrate.

3 is a cross-sectional view of a vertically polarized omnidirectional antenna for a base station that has been conventionally used.

4 is an exploded view of a dual polarized omnidirectional antenna using a dielectric substrate according to the present invention.

Figure 5 is a side view of a dual polarized omnidirectional antenna using a dielectric substrate according to the present invention.

6 is a diagram illustrating a process of rounding an omnidirectional antenna using a dielectric substrate according to the present invention.

7 is a view showing a standing wave ratio of a dual polarized omnidirectional antenna using a dielectric substrate according to the present invention (+ 45 °).

8 is a view showing a standing wave ratio of a dual polarization omnidirectional antenna using a dielectric substrate according to the present invention (-45 °).

9 is a diagram illustrating a radiation pattern of a dual polarized omnidirectional antenna using a dielectric substrate according to the present invention (+ 45 °).

10 is a diagram showing a radiation pattern of a dual polarized omnidirectional antenna using a dielectric substrate according to the present invention (-45 °).

(Explanation of symbols for the main parts of the drawing)

10: radiating element formed on the dielectric substrate 20: dielectric substrate

30: microstrip transmission line 31: input impedance (50Ω)

32,36: impedance matching unit 33,34: power distribution unit

35: transformer (0.25λ) 40: cable

50: feed connector (A-shaped) 60: snow cover (radome)

70: radiating element support pipe 80: styrofoam

90: antenna support clamp

The device of the present invention for achieving the above object is a radiation element unit for receiving an external signal generated from the terminal and propagating the signal generated from the base station equipment or repeater to free space, the transmission and output of the input and output signals, impedance matching and distribution role An antenna comprising a power supply unit for performing a function and an input / output connector for performing a function of inputting and outputting energy transmitted through the power supply unit to a base station equipment or a repeater, wherein the radiating element is a rectangular patch on a dielectric substrate having a metal film An antenna pattern is formed, and a feeding part is disposed at two adjacent corners of the square pattern to generate a double polarization. The feeding part is formed by forming a wiring circuit on the dielectric substrate. Round the formed dielectric substrate to form a cylindrical shape Double, it characterized in that the base is so polarized omni-directional antenna.

The dual polarized omni-directional antenna includes a radiating element support pipe for supporting the radiating element portion, an antenna supporting pipe for supporting the radiating element supporting pipe and the input / output connector, and protected the radiating element portion and a feeding part and connected to the antenna supporting pipe. It may further include a snow cover, wherein the radiating element support pipe is installed in the central portion of the cylindrical antenna, the styrofoam is attached to the outside of the radiating element support pipe, the dielectric having the radiating element formed on the outside of the styrofoam The substrate is attached, and a snow cover is installed outside the dielectric substrate.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is an exploded view of an omnidirectional antenna using a dielectric substrate according to the present invention, and FIG. 5 is a side view. The energy transmitted through the feed connector 50, which is an input / output terminal, is connected to the micro stripline 30 through the transmission cable 40. The feed connector 50, which is an input / output terminal, and the micro stripline 30, which is a transmission line, The power supply connector 50, which is connected to the flexible cable 40 and is an input / output terminal, is installed by processing both surfaces of the antenna support clamp 90.

The energy input to the micro stripline 30 is applied to the characteristic impedance 50? 31, and the applied energy is input to the primary matching circuit 32. Lines 33 and 34 distribute the input energy, of which only 33 / n of the total radiating element is applied to line 33, and the remaining (n-1) / n energy is the secondary of the next radiating element. Is applied to the matching circuit.

The applied power and phase are determined by the designer's design dimensions. Therefore, the problem that the designer could not design arbitrarily in the arrangement by the proximity electric field, which is one of the most commonly used power feeding methods in the conventional vertically polarized omnidirectional antenna, has been improved.

Referring to FIG. 5, the styrofoam 80 is installed outside the radiating element support pipe 70 in which the radiating element support pipe 70 is installed and installed at the center portion of the antenna. The radiating element support pipe 70 and the styrofoam 80 are fixed using acrylic double-sided tape. Fix the radiating element to the outside of the styrofoam 80 using the acrylic double-sided tape in the same way, the anti-fog cover outside the radiating element protects the internal circuit from external force. Radiating element support pipe is connected to the antenna support pipe, the snow cover 60 is also connected to the antenna support pipe (90).

FIG. 6 illustrates a process of rounding an omnidirectional antenna using a dielectric substrate.

7 and 8 show the standing wave ratios of the antennas for + 45 ° and -45 ° polarization, respectively, which are measured values by design values, not measured values by tuning. As shown in the figure, since the standing wave ratio value does not exceed 1.5 in the measurement frequency range, the performance of the antenna will be relatively good. When the standing wave ratio is 1.5, about 98% of the output is radiated.

9 and 10 are diagrams illustrating radiation patterns of antennas for + 45 ° and -45 ° polarizations, respectively. The radiation pattern of the omnidirectional antenna experimented in the PCS band has the characteristics of the omnidirectional antenna as shown in the figure, and also in the TRS, CELLULAR, PCS, IMT-2000, ISM-Band (2.4GHz ~ 2.48GHz) or other frequency bands. The same appears as

The present invention is not limited to the embodiments described above, it can be variously modified and changed by those skilled in the art, which is included in the spirit and scope of the present invention defined in the appended claims.

By using the dual polarized omnidirectional antenna using the dielectric substrate according to the present invention, it is possible to solve the fading phenomenon, simplify the call quality and improve the manufacturing process, and mass produce the antenna having uniform characteristics and reduce the size and weight of the antenna.

Claims (2)

A radiating element unit for receiving an external signal generated from a terminal and propagating a signal generated from a base station equipment or a repeater to a free space; A power supply unit for transmitting / outputting an input / output signal, impedance matching, and distribution; And In the antenna configured to include an input and output connector for performing a function for inputting and outputting the energy transmitted through the feeder to the base station equipment or repeater, The radiating element part is configured to form a rectangular patch antenna pattern on the dielectric substrate having a metal film, and to generate a double polarization by placing a feed position in two adjacent corner portions of the rectangular pattern, The feeding part is formed by forming a wiring circuit on the dielectric substrate, And a circularly polarized omnidirectional antenna, wherein the dielectric substrate on which the radiating element portion and the feeding portion are formed is rounded to form a cylindrical shape. The method of claim 1, Radiating element support pipe for supporting the radiating element portion; An antenna support clamp for supporting the radiating element support pipe and the input / output connector; And Further comprising a snow cover that protects the radiating element and the feeder and is connected to the antenna support clamp, The radiating element support pipe is installed at the central portion of the cylindrical antenna, styrofoam is attached to the outside of the radiating element support pipe, and a dielectric substrate having the radiating element is attached to the outside of the styrofoam is attached to the outside of the dielectric substrate. Dual polarized omnidirectional antenna, characterized in that the cover is installed.