KR20110088177A

KR20110088177A - The dipole device of hybrid type and dual polarization array antenna using that device

Info

Publication number: KR20110088177A
Application number: KR1020100007956A
Authority: KR
Inventors: 정하재
Original assignee: (주)더블유엘호스트
Priority date: 2010-01-28
Filing date: 2010-01-28
Publication date: 2011-08-03

Abstract

PURPOSE: A polarization array antenna apparatus using a front to back ratio and a beam balance property and a dual polarization arrangement antenna device are provided to easily control a beam without a spurious wave. CONSTITUTION: Four dipole devices(231-234) are arranged to be overlapped. A dual polarization signal distribution unit(21) is arranged in the center of the four dipole devices. A feeder(221-224) transmits an in-phase signal to four dipole device. The dipole device group is composed to overlap or cross the equipotential points with the same phase and level.

Description

Hybrid Dipole and Dual Polarization Array Antenna using that Device.

The present invention relates to a radiation element used in a dual polarization antenna and a dual polarization array antenna made by arranging the same.

In the conventional dual polarization antenna device, as shown in FIG. 1A (Patent Publication 10-2007-0099422), four elements are arranged in a rectangular side, so that the feed section is longer than the length of the half-wave dipole in the distribution section of the center. It has been used by feeding.

However, at this time, the feeder acts as a new interferer in space because of the coexistence on the radiation plane, which causes problems such as anomalies in beam width and front and rear ratio at a specific frequency.

In addition, as shown in FIG. 1B (public patent 2001-0040623), the conventional method is mainly because the size of the four element groups 161 and 162 is larger than the half-wavelength, and spatial separation is necessary in order to secure separation between polarizations. Although an arrangement of approximately one wavelength interval 163 is used, this causes an effect of reinforcing the signal in the direction of the reflector plane, which is a main cause of deterioration of the forward directing effect and the formation of the unwanted wave as a whole.

Accordingly, it is an object of the present invention to provide a dual polarization array antenna device capable of arranging a small sized device group and a half-wavelength device group with easy beam control while obtaining sufficient separation.

The present invention to solve the above problems,

By placing four dipole elements on a dielectric substrate or free space, the geometrically overlapping equipotential points with the same phase and level corresponding to the same distance from the center are hybrid-bridged so that the four dipole elements can be groundbreaking without polarization interference. The main solution of the present invention is to arrange a small group of devices having the small size, and to arrange the half-wavelength intervals in the zigzag direction corresponding to the angle of depression from the center line of the array.

The effect generated from the solution means,

It is possible to manufacture an antenna with high gain, excellent front-to-back ratio and beam balance characteristics, and to manufacture an antenna that is easy to control the beam without generating unnecessary wave control functions such as single beam characteristics and electrical up / down tilt in the array. can do.

1A is a diagram for explaining a group of dual polarization antenna elements used in the related art.
1B is a view for explaining a conventional dual polarization array antenna device,
2 is a view for explaining the configuration of the device group of the present invention,
3 is a view for explaining an embodiment in which the device group of the present invention is arranged.

Hybrid dipole device group of the present invention for achieving the above technical problem,

As shown in FIG. 2, four dipole elements 231 to 234 are arranged in a square shape such as a well well, or interposed so that one point in each dipole section overlaps each other. The signal distributed from the dual polarization signal distribution unit 21 transmits a predetermined interval, but the power supply units 221 to 224 having approximately the same length so as to transmit the signal in phase are exactly the same as those of the four signals. It consists of a group of dipole elements which feed to a dipole element and cross or overlap an equipotential point having the same phase and level as the dipole in a hybrid bridge manner.

Referring to the specific functional action of the dipole element group, two polarized feed lines are distributed as four dual polarized signals at the center of the dipole square.

In this case, since the two polarized feed lines are used in various materials such as RF shield cable or dielectric parallel line, the junction part is generally asymmetrically connected with a certain size. Therefore, the four dual polarized signals have a slight asymmetry in phase and magnitude from the beginning of the distribution, and thus the four feed units are the lengths of the predetermined electrostatic coupler 211 and the feeders 221 to 224 connected thereto. The passing signals ensure symmetry similar in time and magnitude. At this time, since the signal of the feeding part also has a mutual inversion line, symmetry similar in time and magnitude means that the signal has the same magnitude but the phase may be reversed.

On the other hand, the length compensation of the feed part may again generate a phase difference geometrically at the intersection point 25 of the hybrid bridge of the dipole, so as to change the junction points 271 and 272 of the feed lines of the dipoles 231 to 234 having a predetermined width. In the same way, geometrically perfect symmetry is achieved.

The four rectangular dipole elements are composed of two horizontally polarized elements 233 and 234 and two vertically polarized elements 231 and 232, and space adjustment is necessary to form a necessary beam width. At this time, if only the interval of the vertical polarization element is adjusted to adjust the horizontal beam width, a phase difference 271-272 is generated at the junction point 272 between the vertical polarization element and the horizontal polarization element, and a current flow is generated between the horizontal polarization element and the vertical polarization element. Get up. Therefore, if the dipole spacing of the horizontal polarization is also changed when the spacing of the vertically polarized waves is changed, the phase difference does not occur. If a phase difference occurs between the vertical and horizontal polarization elements, they have immunity to parallelism, such as a balun of a general antenna element which tries to balance the principle of the hybrid bridge.

That is, the dipole element is an equipotential point into a square shaped like a well.

Due to the configuration, there is a special advantage of simultaneously securing the independence of each polarization and the function of parallelizing beam characteristics even without using a separate balun device, so that the four feed units have the effect of having separate balun devices. Generate. Therefore, if the same performance as the conventional technology is required, there is an advantage that the balun provided in the conventional power supply unit can be omitted. Of course, more sophisticated beams may be added as needed, but the present invention only describes the effects and does not specify them.

In particular, it is difficult to add a separate short stub balun when manufacturing the well-shaped square dipole in a PCB, but open in the direction of the dipole at the feed points 271 and 272 of the dipole. Using an open stub (24) can simultaneously reinforce impedance matching and current parallel characteristics, which requires spatially constant lengths and losses when using dielectric substrates, and is a separate general stub (short stub) with band characteristics. It has better space usage, loss characteristics and bandwidth than stub type balun. The same concept can be applied to the elements of a general antenna.

In addition, in order to further reduce the size of the well-shaped square dipole, each element may be bent to load matching (26).

At this time, it is preferable to extend the length of the device within the range not exceeding the width of the device as shown in the load matching section 26 of FIG. The reason is that when the L-shape or the ball-shape is made, the expanded portion gives unintended interference depending on the frequency.

However, although the interference is not intended in the present invention, this is also a special effect according to the present invention, and it is not specific to the use when such interference is functionally required.

The hybrid intersection point 25 between the dipoles has a property of electrostatically coupling mainly between dielectrics.

However, in the case where the intersection point 25 is connected to a conductor, the radiation beam is eccentric, because even if there is a slight asymmetry generated in the feed part, the radiation beam is eccentric because a strong resonance may occur due to the multiple of the wavelength across the square side at a specific frequency. When the terminations of the radiating elements overlap, the overall length of the square side of the device group is close to the multiple of the wavelength, so the conductor connection is not particularly desirable. However, if the conductor connection is inevitably, the intersection point is separated at least one place. Special care must be taken to ensure that no singularity occurs in the frequency range used, such as selectively operating frequencies. Although the overlapping portions of the radiating elements are capacitively coupled between the radiating elements through a dielectric, it is necessary to optimize the overlapping area so that each radiating element can be operated independently without resonance caused by the square side. Care must be taken.

In addition, the direction of travel of the dipole elements is preferably perpendicular to each other, but may be V-type and various types such as L-type, inverse L-type, and loop type, depending on the intention of the designer. The part where the point overlaps becomes a characteristic of this invention.

As a result, the well-shaped dipole device group can be manufactured in a small space in a limited space to effectively transmit and receive a dual polarized signal, simplify the peripheral device, freely adjust the beam width, and improve the beam parallelism. Has excellent characteristics.

The following describes a method of arranging the device groups as an example of the practical application of FIG.

The device group of the present invention may be used alone, but in a preferred method of configuring an array, the device groups 311 and 312 may be arranged vertically or horizontally, and at least one of the vertical and horizontal axes 34 may be approximately half-wavelength apart. In this case, the signal in the reflection plane direction can be effectively suppressed.

Therefore, the arrangement axis 34 of the half-wavelength spacing is securely arranged so that the same kind of polarization is adjacent to each other, thereby ensuring the separation between the different types of polarization.

That is, if a high gain array antenna having a 60-degree horizontal beam width is designed, the horizontal angle of deflection 33 of the device group is approximately 1/4 wavelength, and the required angle is about four devices inside the device group. It is adjusted as the interval between dipoles according to the square size inside the collective well, and the vertical angle of incidence d1,32 of the device group is preferably approximately half-wavelength spacing.

In addition, when the device group is arranged in a rhombus shape with respect to the vertical axis, since the same type of polarization is adjacent to each other, the arrangement of the devices may be arranged in a line, and may be configured in a zigzag shape as a predetermined width to form a specific beam width.

As described above, it is apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and thus, the modifications and modifications belong to the appended claims. will be.

*** Explanation of reference numerals for main parts of drawing ***
20: A group of dual polarized radiation elements shaped as well wells
21: dual polarization distribution unit 211: electrostatic coupler
221 ~ 224: Feeder 231 ~ 234: Radiator
24: open stub balun 25: intersection
26: length load matching unit (Loading) 271,272: feed phase adjustment unit
311,312: Well-defined double polarized radiation element group
32: Vertical array spacing of device group 33: Horizontal array spacing of device group
34: axis of element group array

Claims

In constructing a dual polarized antenna element,
Place four radiating elements in a well shape on the antenna reflection plane,
A dual polarized antenna element device comprising a device group so that any equipotential points having the same phase and level among the radiating elements cross each other at a predetermined angle.

The antenna device according to claim 1, wherein in the vertical arrangement of the element groups consisting of four dipole elements, the element groups are arranged in a zigzag shape with respect to any one axis of the arrangement.

The arrangement antenna according to claim 1, wherein the arrangement antennas are arranged in a zigzag shape in a predetermined width, including a one-line array, when the array antennas are formed using a group of elements having a rhombus shape with respect to the axial direction of the array. Antenna device.

2. The antenna element device according to claim 1, wherein an open stub is added to a contact point of a feeder and a radiator to induce beam balance and load matching of the element group.