KR20060105091A - Unfeeded coupling multi-band antenna - Google Patents

Abstract

The present invention relates to a multi-band antenna in a repeater antenna of a mobile communication service, in which power of a high frequency band patch is coupled to a patch of a low frequency band through a coupling stub to simultaneously relay several frequency bands. A second patch dipole element by coupling a feed line for supplying electromagnetic waves connected to an external device by power supply, the first and second patch dipole elements arranged up and down in parallel to radiate electromagnetic waves, and the feeding of the first patch dipole element Coupling stub for feeding to the first, second patch dipole element and the patch support for attaching the coupling stub, and extending from the second patch dipole element and tuning stub and electromagnetic wave for matching the impedance of electromagnetic waves in one direction It is made of a reflecting plate to make.

According to the non-powered coupling multiband antenna according to the present invention, a single frequency band antenna of an existing cellular system or a PCS system is replaced with a multiband antenna according to the present invention to provide service for each frequency band of a cellular and PCS system. In addition, it will be able to simultaneously service 4G mobile communication using IMT-2000 project and satellite DMB system.

Dipole, Reflector, Coupling, Multiband, Antenna, Feed

Description

Unfeeded Coupling Multi-Band Antenna

1 is an exploded perspective view of a non-powered coupling multiband antenna according to an embodiment of the present invention;

2 is a plan view of a non-powered coupling multiband antenna according to an embodiment of the present invention;

3 is a cross-sectional view showing a cross-section A-A in the embodiment of FIG. 2 according to the present invention;

4A is a plan view of a first patch dipole element in a non-powered coupling multiband antenna according to the present invention;

4B is a plan view of a second patch dipole element in a parasitic coupled multiband antenna according to the present invention;

** Description of symbols for the main parts of the drawing **

10: first patch dipole element 20: second patch dipole element

11,21: insulated panel 12,22: metal conductor plate

13,23: slit 14,24: support hole

15a, b: Feed terminal 25: Feed line hole

26a, b, c, d: tuning element

30: tuning stub 40: reflector

50: patch support 60: feeder

The present invention relates to an antenna for a repeater for resolving shadow areas in a mobile communication service. More particularly, the power of a high frequency band patch is coupled to a patch of a low frequency band through a coupling stub to simultaneously relay several frequency bands. The present invention relates to a multiband antenna.

In general, a wireless communication system in a mobile communication service is divided into a cellular system of 800 MHz band and a PCS system of 1800 MHz band, and the services of the cellular system and the PCS system are separately provided by different operators. In the repeater for resolving shaded areas such as underground, etc., different single patch antennas are used according to each frequency band.

However, in recent years, due to the rapid development of mobile communication and satellite communication, the role of wireless communication service becomes more important in the information society, and is rapidly changing from conventional voice-oriented narrowband communication to broadband communication such as multimedia.

In addition, in the 4th generation mobile communication using IMT-2000 business and satellite DMB (Digital Digital Broadcasting) system, new wireless communication service with high frequency of 2600MHz band is started, and the frequency band is getting wider and wider. In order to provide a variety of services according to the above trend, it is necessary to develop a system and various devices capable of simultaneously serving a low frequency and a high frequency as well as a conventional single frequency band. In particular, even in the antenna for the relay to solve the shadow area, such as the interior or underground of the building, a mobile communication service antenna that can service from a low frequency band of 800MHz to a high frequency band of 2600MHz is required.

In this case, according to the acceptance of the new frequency band, the conventional single patch antenna separately installs an antenna corresponding to a low frequency or a high frequency band, or an additional antenna suitable for an IMT2000 or satellite DMB system is installed in the existing single patch antenna installation area. Since the operator side, it takes a lot of time and cost to produce or install a number of antennas for each frequency.

The present invention has been proposed to solve the above problems, by simplifying the structure to solve the shadow area, such as inside the building or underground, by enabling a wireless communication service for multiple frequency bands, It is an object of the present invention to provide a multi-band antenna that can provide new services by integrating existing services using only antennas and can reduce manufacturing and installation costs.

In order to achieve the above object, the non-powered coupling multi-band antenna of the present invention is connected to an external device by a connector and is disposed in parallel with the feeder line for feeding electromagnetic waves, and is fed up and down by the feeder line at a high frequency. Between a first patch dipole element for radiating electromagnetic waves in a band, a second patch dipole element arranged in parallel with the first patch dipole element, and for radiating electromagnetic waves in a low frequency band, and the first and second patch dipole elements A coupling stub positioned to couple the feeding of the first patch dipole element to the second patch dipole element, and a patch support for attaching the first and second patch dipole elements and the coupling stub; For matching the impedance of the electromagnetic wave extending from the second patch dipole element and fed to the first and second patch dipole elements The tuning plate and the support are fixed and attached, characterized in that made of a reflecting plate disposed in parallel with the first and second patch dipole elements for radiating the electromagnetic waves radiated by the first and second patch dipole elements in one direction.

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

1 is an exploded perspective view of a non-powered coupling multi-band antenna according to an embodiment of the present invention. Referring to FIG. 1, in the non-powered coupling multiband antenna of the present invention, the first patch dipole element 10 and the second patch dipole element 20, the coupling stub 30, and the reflector plate 40 are patch supports ( 50), and the electric power feeding method is supplied to the first patch dipole element 10 through the feed line 60, the electromagnetic wave input from the connector 61, the first patch dipole element 10 The radiated electromagnetic waves are automatically coupled to the second patch dipole element 20 through the coupling stub 30.

In more detail, the reflection plate 40 for radiating the electromagnetic waves of the first and second patch dipole elements 10 and 20 in one direction is positioned below, and the first and second patch dipole elements are disposed on the central front surface of the reflection plate. The patch support 50 is attached to support the connector, and the connector 61 is positioned at one side of the bottom surface of the reflector, and the feeder line 60 to which the connector is attached is used to attach the patch support 50 at the center of the reflector. Are connected together.

The second patch dipole element 20 is spaced at regular intervals in parallel with the reflector plate 40 and fixedly positioned by the patch supporter 50 on the front surface of the reflector plate 40. The one patch dipole element 10 is spaced apart at regular intervals in parallel with the second patch dipole element 20.

In addition, the coupling stub 30 is a patch support between the first patch dipole element 10 and the second patch dipole element 20 to couple electromagnetic waves radiated from the first patch dipole element to the second patch dipole element. It is attached to 50.

The non-powered coupling multiband antenna of the present invention having such a structure is protected by a case 70 made of a dielectric material having low electromagnetic wave loss.

2 illustrates a plan view of a non-powered coupling multiband antenna according to an embodiment of the present invention. Referring to FIG. 2, the first patch dipole element 10 is a patch that is fed from a feed line (60 in FIG. 1) to radiate electromagnetic waves of a high frequency band, and the second patch dipole element 20 is a first patch dipole element. The signal fed to 10 is coupled and fed by the coupling stub 30, and is a patch for radiating electromagnetic waves in the low frequency band.

Therefore, the first patch dipole element 10 is manufactured to have a relatively small size compared to the second patch element 20 for high frequency radiation, and is disposed with a constant distance in parallel with the second patch element, and the coupling stub ( 30) is disposed between the first and second patch dipole elements.

Figure 3 shows an A-A cross section in the embodiment of Figure 2 according to the present invention. Referring to FIG. 3, the non-powered coupling multiband antenna of the present invention is basically a small first patch dipole element 10 and a large second patch dipole element 20 to be usable in two or more frequency bands. The reflector 40, the second patch dipole element 20, the coupling stub 30, and the first patch dipole element 10 are sequentially stacked around the patch support 50 and the feed line 60. Structure.

In addition, a patch support 50 for attaching the first and second patch dipole elements and the coupling stub is located at the center of the reflector plate 40, and a feeder line having a connector (61 in FIG. 1) attached to the external device is attached thereto. 60 is connected to the first patch dipole element 10 along the patch support 50 through the center of the reflector.

In such a structure, the frequency resonance position is changed according to the spacing and size of each patch dipole element, and each patch dipole element 10, 20 is intended to resonate with the patch support 50 attached to the center of the reflector 40. The locking jaws 51 and 52 are formed to be parallel to each other at a predetermined interval according to the frequency.

In the case of the second patch dipole element 20, the distance between the reflector plate 40 and the second patch dipole element 20 should be maintained at 0.25λ of the wavelength in order to facilitate resonance in a low frequency band of 800 MHz. However, in the present invention, the distance between the second patch dipole elements is set to 0.05λ in consideration of the size of the antenna, and tuning plates (26a to 26d in FIG. 5) are separately added for smooth resonance.

In the power feeding method, a signal input to the connector 61 from an external device is applied to the first patch dipole element 10 through the feed line 60, and the coupling stub (2) is not applied to the second patch dipole element 20 without any special feeding. 30) through automatic coupling. To this end, a coupling stub 30 made of a metal plate of a conductor is attached to the patch support 50 perpendicular to the patch dipole element between the first and second patch dipole elements 10 and 20, in which case the coupling stub is provided. Care should be taken not to change the polarization component of the patch dipole elements 10 and 20 itself.

The reflection panel 40 blocks electromagnetic waves radiated backward from the first and second patch dipole elements 10 and 20 so that the electromagnetic waves of the antenna have a directivity toward the front. That is, the electromagnetic waves radiated from the first and second patch dipole elements 10 and 20 travel forward and backward of the element, but the electromagnetic waves traveling backwards are canceled by the radiated electromagnetic waves by the reflector 40 and are only forward of the reflector. It has a directing direction, where the second patch dipole element 20 also serves as a reflector to reflect the electromagnetic wave radiated from the first patch dipole element 10.

4A and 4B respectively show plan views of a first patch dipole element and a second patch dipole element in a non-powered coupling multiband antenna according to the present invention.

The first and second patch dipole elements have a structure of a skeleton slot copier, and the rectangular slots 13 and 23 are formed in the center of the flat metal conductor plates 12 and 22 to radiate electromagnetic waves. In addition, the patch dipole device has the size of the metal conductor plates 12 and 22 and the size of the rectangular slots 13 and 23 so as to resonate at high and low frequency bands, respectively, and have a symmetrical structure. In general, the size of the metal conductor plate has a size of 0.5 lambda of the wavelength on the horizontal side and 0.25 lambda of the wavelength on the longitudinal side.

Referring to FIG. 4A, a skeleton diopter of the metal conductor plate 12 is attached to a panel 11 of an insulator that does not affect the radiation of electromagnetic waves as a patch dipole element for radiating electromagnetic waves in a high frequency band.

A hole 14 for attaching the element is formed in the center of the panel 11 of the first patch dipole element by a patch support (50 in FIG. 3), and in the metal conductor plate 12, a feed line (60 in FIG. 3). The terminal 15a for feeding and the terminal 15b for grounding are formed symmetrically with respect to the center. The first patch dipole element 10 is a device for radiating electromagnetic waves in the high frequency band, and in the embodiment of the present invention, the metal conductor plate 12 and the rectangular slot 13 are arranged to resonate in the frequency band of 1885 MHz to 2655 MHz. Size was constructed.

Referring to FIG. 4B, the first patch dipole device is configured to be larger than the first patch dipole device so as to radiate electromagnetic waves in a low frequency band and also serve as a reflector for electromagnetic radiation of the first patch dipole device 10. A patch support (50 in FIG. 3) is attached to the center of the panel 21 of the second patch dipole element, and holes 24 and 25 for penetrating the feed line (60 in FIG. 3) are integrally formed.

The second patch dipole element 20 is a device for radiating electromagnetic waves of a low frequency band. In the embodiment of the present invention, the size of the metal conductor plate 22 and the slot 23 is configured to resonate in the frequency band of 824 MHz to 894 MHz. It became.

In addition, each of the corner portions of the rectangular metal conductor plate 21 has first to fourth tuning plates 26a to 26d in the second patch dipole element 20 to improve smooth resonance and impedance characteristics in the low frequency band. It is formed integrally extending with the metal conductor plate 21. By adjusting the size and shape of the tuning plate, the low frequency band to be copied can be determined and the impedance characteristics can be improved.

As described above, the non-powered coupling multi-band antenna according to the present invention can serve a multi-band using one antenna according to the broadband characteristics of a recent wireless communication system, thereby providing a single frequency of a conventional cellular system or a PCS system. By simply replacing the band antenna with the multi band antenna according to the present invention, it is possible to service each frequency band of the cellular and PCS system, as well as to provide services for the 4th generation mobile communication using the IMT-2000 project and the satellite DMB system. You can do it.

Therefore, the mobile communication service provider can reduce the number of antennas installed by using the antenna of the present invention, and can reduce the cost of manufacturing or installing the antenna.

Claims (3)

In the antenna used for transmission and reception in a wireless communication system, A feeder connected to an external device by a connector to feed electromagnetic waves; A first patch dipole element which is fed through the feed line and radiates electromagnetic waves in a high frequency band; A second patch dipole element disposed in parallel with the first patch dipole element to radiate electromagnetic waves in a low frequency band; A patch support for attaching the first and second patch dipole elements; A coupling stub positioned between the first and second patch dipole elements to couple the feeding of the first patch dipole element to feed the second patch dipole element; And And the reflector is fixedly attached to the support and reflects an electromagnetic wave radiated by the first and second patch dipole elements in one direction. The non-powered coupling multi-band antenna according to claim 1, wherein the first and second patch dipole elements have a rectangular slot in the center of the flat metal conductor plate. The method of claim 2, wherein the second patch dipole element is formed in each corner portion of the metal conductor plate, the tuning plate for improving the smooth resonance and impedance characteristics in the low frequency band is formed integrally extending with the metal conductor plate. Parametric Coupling Multiband Antenna.

Images