KR102331332B1 - Antenna for mobile communication repeater - Google Patents

Abstract

Disclosed is an antenna for a mobile communication repeater, which is optimized to realize high-isolation characteristics between adjacent antennas. The antenna for a mobile communication repeater of the present invention is based on an antenna including a ground reflector having a predetermined area, a substrate fixed to be spaced apart from the ground reflector, and an antenna element part formed on a surface of the substrate. The antenna element part includes: a dipole radiating element arranged symmetrically in one direction; and a dipole pattern element disposed in a cross direction on the dipole radiating element along a symmetrical central line of the dipole radiating element. The dipole pattern element is formed in a non-radiative type to receive and process a cross signal with respect to a main signal of the radiating element. According to the present invention, a design of the antenna for repeater is simple and compact while realizing the high-isolation characteristics.

Description

Antenna for mobile communication repeater {Antenna for mobile communication repeater}

The present invention relates to an antenna for a mobile communication repeater, and more particularly, to an antenna for a repeater capable of optimally realizing high-isolation characteristics between adjacent antennas.

Wireless mobile communication systems currently being serviced in Korea and abroad are providing 4G (LTE) services in 2G using 700 MHz and 800 MHz bands, 1800 MHz bands, and 2000 MHz bands. Accordingly, the antenna for a mobile communication repeater is being manufactured and developed with multi-band and wide-band characteristics, and the antenna of the present invention is also an antenna for a repeater that can be used in the low-band (718 to 875 MHz) and high-band (1710 to 2130 MHz) bands. am.

In general, a repeater antenna includes a donor antenna for receiving a radio frequency signal transmitted from a base station, and a service antenna for receiving the signal and transmitting it to a user terminal, in which case a high-quality communication service is provided to the user. In order to provide this, it is important to eliminate mutual signal interference between both adjacent antennas as much as possible and implement high-isolation, and research/development to obtain a higher level of isolation is continuing.

For example, 'a flat array antenna for preventing interference in a wireless communication system' disclosed in Patent No. 10-0570353 is an example.

In other words, the antenna disclosed in the patent is that a plurality of radiation elements constituting the radiation unit are arranged in an N×N matrix unit, but high-isolation can be realized by configuring them in a rhombus shape with respect to the vertical direction of the earth's surface. Basically, the main beam radiated by the radiation unit is radiated forward of the antenna, and the side lobe causing the interference is radiated in a diagonal direction (±45°) up and down with respect to the vertical direction of the earth's surface. have.

However, there is also a question as to how much high-isolation characteristics the antenna actually implements between other adjacent antennas, and the antenna device is very complicated in its configuration and design, difficult to manufacture, and has a large overall scale, so that it can be applied in practice. There are bound to be many problems with doing so.

<Prior art literature>

Registered Patent Publication No. 10-0570353

Registered Patent Publication No. 10-0703932

Registered Patent Publication No. 10-0854470

Registered Patent Publication No. 10-0957852

An object of the present invention is to provide an antenna for a repeater optimized for realizing high-isolation characteristics between adjacent antennas, that is, a donor antenna and a service antenna, within the repeater as an antenna for a mobile communication repeater. In particular, an object of the present invention is to provide an antenna for a mobile communication repeater that is easy to manufacture and has excellent economical efficiency due to its simple configuration and design, and has excellent mobility and space due to its small size.

The repeater antenna of the present invention is:

It includes a ground reflector of a certain area, a substrate spaced apart from the reflector, and an antenna element formed on the surface of the substrate,

The element part:

a dipole radiating element arranged symmetrically in one direction;

a dipole pattern element disposed in a cross-direction on the radiating element along the symmetrical center line of the radiating element;

includes,

In this case, the pattern element is configured in a non-radiative type, receiving and processing a cross signal for the main signal of the radiating element;

is characterized by

Preferably,

Each element of the radiating element is a patch in the form of a rhombus, and each element of the pattern element is a patch intersectingly disposed in the central 'V'-space of the radiating element.

More preferably,

Each element of the pattern element is a patch in the form of a rhombus having a smaller size than each element of the radiating element.

The radiating element is:

a first dipole responsible for low frequency band resonance as a whole of each element;

a second dipole having a symmetrical center in charge of resonance in a high frequency band as a part of the first dipole;

It is characterized in that it includes.

Preferably, the radiating element comprises:

a slot formed on the surface of each element, wherein the second dipole is a portion divided by a symmetrical center of the first dipole by the slot;

is characterized by

Here, the slot is configured as a bent slot that forms the second dipole in a small rhombus shape.

In addition, the repeater antenna is:

It includes an antenna fence formed to have a certain height as a form oppositely bent from both sides of the reflector;

the substrate being fixed to the position of the upper end of the fence;

is characterized by

The repeater antenna is:

Each of the elements is fastened to both sides of the repeater housing so as to face the outside, in this case, both antennas are installed in a direction perpendicular to each other;

is characterized by

Preferably, the enclosure comprises:

a repeater fence formed around the repeater antenna and at regular intervals from the repeater antenna;

includes

The repeater antenna of the present invention includes a non-radiating dipole pattern element in a direction intersecting with the dipole radiating element to receive and process side lobe signals generated and introduced in the cross direction in addition to the main beam signal, thereby blocking signal interference. Accordingly, a high-isolation characteristic between adjacent antennas is substantially realized, thereby having a special effect of providing a high-quality communication service.

In addition, the low-frequency band and high-frequency band characteristics of the antenna are implemented by a method of technically dividing each patch of the dipole radiating element.

The repeater antenna of the present invention has the above-described isolation and multi-band characteristics through the arrangement and design of each dipole element, so the overall configuration and design is simple, so it is easy to manufacture and has excellent economic feasibility. It has an excellent spatial effect.

1 is a perspective view of an antenna for a repeater according to the present invention.
Fig. 2 is a front view of Fig. 1;
Fig. 3 is a bottom view of Fig. 1;
Fig. 4 is a side view of Fig. 1;
5 is a front perspective view of a repeater to which the repeater antenna of FIG. 1 is applied;
Fig. 6 is a rear perspective view of Fig. 5;
7 is a radiation pattern diagram for each band of the repeater antenna according to the present invention.
8 is a VSWR graph of FIG. 7;
9 is an isolation graph of FIG. 7 .

The features and effects of the present invention 'mobile communication repeater antenna' (hereinafter 'repeater antenna') described or not described above will become more apparent through the description of the embodiments described below with reference to the accompanying drawings. In the drawings below in FIG. 1, an antenna for a repeater according to an embodiment of the present invention is denoted by a reference numeral '10'.

The repeater antenna 10 of the present invention is installed on both sides of an ICS (Isolation Cancellation System) repeater, and is used as a donor antenna and a service antenna. Referring to the repeater 100 of FIGS. 5 and 6, reference numeral 10a on the front side is a donor antenna arranged horizontally, and symbol 10b on the rear side is a service antenna arranged 90° vertically with respect to the donor antenna 10a. However, two antennas ( 10a, 10b) are both structurally the same as the repeater antenna 10 according to the present invention.

1 to 4, the repeater antenna 10 of the present invention includes a ground reflector 11 having a predetermined area, a substrate 12 fixed to be spaced apart from the reflector 11, and the substrate 12. Based on a repeater antenna including an antenna element unit 13 formed on the surface, the present invention optimally implements high-isolation characteristics between adjacent antennas through a specific design of the element unit 13 .

The element unit 13 includes a dipole radiating element 14 arranged symmetrically in one direction, and a dipole pattern element disposed cross-direction symmetrically on the radiating element 14 along the symmetric center line of the radiating element 14 ( 15), wherein the pattern element 15 is configured in a non-radial shape.

For example, in the donor antenna 10a, the main signal is horizontally polarized. However, a cross signal reflected from the outside or flowing backward among the vertically polarized signals radiated as the main signal from the service antenna 10b comes into the donor antenna 10a. At this time, the vertical pattern element 15 of the donor antenna 10a receives this cross signal. In this way, the pattern element 15 receives the cross signal coming from the side or the opposite side, and processes and removes itself.

As described above, the operation of the pattern element 15 to process the cross signal is similarly applied in relation to the donor antenna 10a even in the case of the service antenna 10b in which the main signal is a vertically polarized wave.

However, the cross signal received by the pattern element 15 in the repeater antenna 10 of the present invention is not transmitted to the repeater 100 equipment side, which means that the pattern element 15 is connected to the feed cable 16 This is because it is composed of a non-emissive element only as a dipole pattern. As a result, the repeater antenna 10 can block interference of signals generated and introduced in the cross direction other than the main beam signal, and thus can effectively implement high-isolation characteristics between adjacent antennas.

3, reference numeral 20 is a power supply cable connected to the right element among the radiating elements 14, and reference numeral 21 is a short-bar connected between the left element and the reflector 11, which is the first dipole 14 ) serves as a balun in dispatch. On the other hand, as in FIGS. 1 and 2, an attenuator 22 may be configured on the feed cable 20, which is used to reduce the gain of the repeater antenna 10 because it is higher than the standard. has been used as

Specifically, each element 14a of the radiating element 14 is a patch in the form of a rhombus, and each element 15b of the pattern element 15 intersects the central 'V'-space portion of the radiating element 14 . It is a patch that is deployed as Preferably, each element 15a of the pattern element 15 is a patch in the form of a rhombus having a smaller size than each element 14a of the radiating element 14 . This configuration is very effective in implementing the design easily and compactly while satisfying the antenna characteristics and high-isolation characteristics of the element portion 13 as a whole.

In fact, since the strength of the so-called cross signal described above is relatively small compared to the main signal, each element 15a of the pattern element 15 does not need to be larger in size than each element 14a of the radiating element 14 . none.

Here, the radiating element 14 includes a first dipole 16 responsible for low-frequency band resonance as a whole of each element 12a, and a symmetrical central part of the first dipole 16 responsible for high-frequency band resonance as a part of the first dipole 16. Includes 2 dipoles (17). In this embodiment, the radiating element 14 includes a slot 18 formed on the surface of each element 14a, wherein the second dipole 17 is connected to the first dipole 16 by the slot 18. ) can be divided into a symmetrical central part.

In the present invention, the multi-band or wide-band characteristic of the repeater antenna 10 is implemented in this way. Here, the slot 18 is formed as a 'bend type' slot that forms the second dipole 17 in a smaller rhombus shape compared to the first dipole 16 . This form not only facilitates the design of the first and second dipoles 16 and 17 using each element 14a and the setting of the position of the second dipole 17 with respect to the first dipole 16, but also relays There is an advantage of making the resonance characteristics for each band clear and constant of the antenna 10 for use.

In fact, the repeater antenna 10 of the present invention was developed as an antenna for a mobile communication repeater in a low frequency band of 718 to 875 MHz and a high frequency band of 1710 to 2130 MHz as a frequency band used.

In this embodiment, the antenna 10 for the repeater includes an antenna fence 19 in the form of being bent opposite to a predetermined height on both sides of the reflector 11, and the substrate 12 is a fence 19 ) is fixed at the upper end position of Here, the fence 19 serves as a C-couple to make the low frequency bandwidth sufficiently low adjacent to the first dipole 16 while stabilizing the structure and design.

5 and 6, the repeater antenna 10 is fastened to both sides of the repeater 100 housing 101 so that the element part 13 faces outward, at this time, each antenna 10a provided on both sides , 10b) are installed in a direction orthogonal to each other. Here, the housing 101 includes a repeater fence 102 formed around the repeater antennas 10a and 10b, and the repeater antennas 10a and 10b and at regular intervals.

The repeater fence 20 serves to collect the radiation beam of the repeater antenna 10 to minimize the signal directed to the side and rear.

7 to 9 are diagrams showing the characteristics of the repeater antenna 10 according to the invention, Figure 7 is a repeater antenna 10 according to the invention in the communication repeater 100 each donor antenna (10a) and service antenna ( 10b) shows a radiation pattern for each band, FIG. 8 is a VSWR graph, and FIG. 9 shows an isolation graph.

Referring to the drawings, the repeater antenna 10 according to the present invention can be effectively used in a low frequency band and a high frequency band as a donor antenna 10a and a service antenna 10b for a mobile communication repeater, and also in the standing wave ratio and isolation characteristics. It can be seen that it shows up quite well. Moreover, as described above, the repeater antenna 10 of the present invention is expected to have considerable competitiveness in the repeater antenna field due to its simple configuration and design and small scale at the same time.

10, 10a, 10b. repeater antenna
11. Reflector
12. Substrate
13. Small part
14. Radiating element 14a. device
15. Pattern element 15a. device
16. First Dipole
17. 2nd dipole
18. Slots
19. fence
20. Feed cable
21. Short Bar
22. Attenuator
100. Repeater
101. hull
102. Repeater fence

Claims (9)

It includes a ground reflector 11 of a certain area, a substrate 12 fixed to be spaced apart from the reflector 11, and an antenna element unit 13 formed on the surface of the substrate 12,
The element part 13 includes:
a dipole radiating element 14 arranged symmetrically in one direction;
a dipole pattern element 15 disposed in a cross-direction on the radiating element 14 along the symmetrical center line of the radiating element 14;
includes,
In this case, the pattern element 15 is configured in a non-radiative type, and receives and processes a cross signal for the main signal of the radiating element 14;
Each element 14a of the radiating element 14 is a patch in the form of a rhombus, and each element 15a of the pattern element 15 is alternately disposed in the central 'V'-space portion of the radiating element 14 . being a patch;
Antenna for mobile communication repeater, characterized in that.
delete According to claim 1,
Each element (15a) of the pattern element (15) is an antenna for a mobile communication repeater, characterized in that compared to each element (14a) of the radiating element (14) is a patch in the shape of a rhombus.
4. The method of claim 1 or 3,
The radiating element 14 includes:
a first dipole 16 responsible for low-frequency band resonance as a whole of each element 14a;
a second dipole 17 having a symmetrical central portion responsible for high-frequency band resonance as a part of the first dipole 16;
An antenna for a mobile communication repeater comprising a.
5. The method of claim 4,
the radiating element 14 includes a slot 18 formed in the surface of each element 14a;
the second dipole 17 is a portion divided by a symmetrical center of the first dipole 16 by the slot 18;
Antenna for mobile communication repeater, characterized in that.
6. The method of claim 5,
The slot (18) is an antenna for a mobile communication repeater, characterized in that it is composed of a bent slot that forms the second dipole (17) in a smaller rhombus shape compared to the first dipole (16) in the rhombus shape.
According to claim 1,
The repeater antenna includes an antenna fence 19 formed to have a certain height in the form of oppositely bent from both sides of the reflector 11;
the substrate 12 is fixed at the upper end position of the fence 19;
Antenna for mobile communication repeater, characterized in that.
According to claim 1,
The repeater antenna is fastened to both sides of the repeater 100 housing 101 so that each element part 13 faces outward, and each repeater antenna on both sides of the housing 101 is a donor antenna 10a and An antenna for a mobile communication repeater, characterized in that the service antenna (10b) is installed in a direction orthogonal to each other.
9. The method of claim 8,
The housing 101 is an antenna for a mobile communication repeater, characterized in that it includes a repeater fence 102 formed at regular intervals around the repeater antennas (10a, 10b).

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