KR20030058027A - Microstrip antenna for suppressing a unwanted radiation wave - Google Patents

Abstract

PURPOSE: A microstrip antenna is provided to be capable of minimizing an interference by suppressing radiant beams of a lateral direction and a back direction. CONSTITUTION: A plurality of radiation elements(20-1,...,20-m) are arranged on an entire surface of a substrate(10) in vertical and horizontal directions to radiate a radio wave. The first reflection plate(30) is spaced apart from the rear of the substrate and reflects radio waves radiated from the radiation elements. The second reflection plate(40) is spaced apart from the rear of the first reflection plate. A radio wave absorption material(50) is filled between the first and second reflection plates and absorbs radiant beams of a lateral direction and a back direction from the first reflection plate.

Description

Microstrip antenna for suppressing a unwanted radiation wave

The present invention relates to an unnecessary radiation suppression type microstrip antenna, and more particularly, in a base station or repeater for mobile communication services such as IMT-2000, PCS, and cellular, the width of a radiation beam radiated from the microstrip antenna in all directions. The present invention relates to an unnecessary radiation suppression type microstrip antenna which suppresses unnecessary interference waves radiated in the lateral and rear directions while minimizing interference.

In general, a microstrip antenna is a type of planar antenna, and compared with other antennas, the microstrip antenna is very light, thin, and small, and thus can be mass-produced using a printed circuit technique.

As a result, the microstrip antenna is expected to have a variety of applications in the future due to low manufacturing cost and easy installation.

Conventional microstrip antennas include: a plurality of radiating elements arranged in a horizontal and vertical direction on a front surface of a substrate to radiate radio waves to or to absorb radio waves from subscriber stations in a service area; It is composed of a reflecting plate attached to the rear of the substrate spaced apart, reflecting the radio waves radiated from the plurality of radiation elements.

In the conventional microstrip antenna configured as described above, since the lateral radiation beam and the rear radiation beam are largely generated in the reflector as shown in FIG. There was a problem.

The present invention has been made to solve the above problems, the first object of the present invention is a multi-directional microstrip antenna of a base station or repeater for mobile communication services such as IMT-2000, PCS, cellular, lateral radiation beam An object of the present invention is to provide an unnecessary radiation suppression type microstrip antenna that suppresses the interference radiation of the rearward and rearward beams to minimize interference interference with other communicators.

In addition, in the multi-directional microstrip antenna of the mobile communication service base station or repeater such as IMT-2000, PCS, cellular, etc., the second object of the present invention is to narrow the width of the omnidirectional radiation beam to receive radio waves of other base stations or repeaters. An unnecessary radiation suppressing microstrip antenna is provided for suppressing.

In addition, the third object of the present invention is to suppress other lateral radiation beams and backward radiation beams in other unidirectional microstrip antennas of a base station or repeater for mobile communication services such as IMT-2000, PCS, cellular, etc. The present invention provides an unwanted radiation suppressed microstrip antenna that minimizes interference interference.

In order to achieve the first object as described above, the present invention, in the multi-directional microstrip antenna of the base station or repeater for mobile communication services, is arranged in the horizontal and vertical direction on the front of the substrate, a plurality of radiation to the base station Copy elements; A first reflection plate formed to be spaced apart from the rear of the substrate and reflecting radio waves radiated from the plurality of radiation elements to a base station; A second reflector formed to be spaced apart from the rear of the first reflector; And a radio wave absorber filled between the first reflecting plate and the second reflecting plate to absorb a lateral radiation beam and a rear radiation beam generated in the first reflection plate.

In addition, in order to achieve the second object as described above, the present invention is characterized in that it further comprises a power supply element for supplying a radio wave and power of a different phase to each of the plurality of radiation elements arranged in the horizontal and vertical direction do.

In addition, in order to achieve the third object as described above, the present invention, in the unidirectional microstrip antenna of the base station or repeater for mobile communication services, is arranged in the vertical direction on the front of the substrate, and propagates to the subscriber station in the service area Multiple copy elements for copying; A first reflector formed at a rear of the substrate and reflecting radio waves radiated from the plurality of radiation elements to a subscriber station in a service area; A second reflector formed to be spaced apart from the rear of the first reflector; And a radio wave absorber filled between the first reflecting plate and the second reflecting plate to absorb a lateral radiation beam and a rear radiation beam generated by the first reflection plate.

In addition, in order to achieve the third object as described above, the present invention is characterized in that it further comprises a power supply element for supplying a radio wave and power of a different phase to each of the plurality of radiation elements arranged in the vertical direction.

1 is a front view showing a first embodiment of an unnecessary radiation suppression type microstrip antenna according to the present invention;

2 is a side view showing a first embodiment of an unnecessary radiation suppression type microstrip antenna according to the present invention;

3 is a plan view showing a first embodiment of an unnecessary radiation suppression type microstrip antenna according to the present invention;

4 is a view for explaining a radiation pattern according to the first embodiment of the unnecessary radiation suppression type microstrip antenna according to the present invention and a radiation pattern by a conventional antenna;

5 is a front view showing a second embodiment of the unnecessary radiation suppression type microstrip antenna according to the present invention;

6 is a side view showing a second embodiment of the unnecessary radiation suppression type microstrip antenna according to the present invention;

7 is a plan view showing a second embodiment of the unnecessary radiation suppression type microstrip antenna according to the present invention;

8 is a view for explaining the radiation pattern according to the second embodiment of the unnecessary radiation suppression type microstrip antenna according to the present invention and the radiation pattern by the conventional antenna.

** Explanation of symbols for main parts of drawings **

10: substrate (PCB substrate or air microstrip substrate)

10a: support 20: multiple copy elements

30: first reflector 40: second reflector

50: radio wave absorber 60: power supply element

60a: feed connector 70: cover means

80: support 80a, 80b: fastener

90a, 90b, 90c, 90d: wall hanging means

Hereinafter, an embodiment of an unnecessary radiation suppression type microstrip antenna according to the present invention will be described with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited thereto, but may be variously modified and modified by those skilled in the art.

1 is a front view showing a first embodiment of the unnecessary radiation suppression type microstrip antenna according to the present invention, FIG. 2 is a side view of the first embodiment, FIG. 3 is a plan view of the first embodiment, and FIG. 1 is a diagram illustrating a radiation pattern according to an embodiment and a radiation pattern by a conventional microstrip antenna.

5 is a front view showing a second embodiment of the unnecessary radiation suppression type microstrip antenna according to the present invention, FIG. 6 is a side view of the second embodiment, FIG. 7 is a plan view of the second embodiment, and FIG. It is a figure for explaining the radiation pattern by the 2nd Example and the radiation pattern by the conventional microstrip antenna.

1 to 3, the first embodiment according to the present invention, in the multi-directional microstrip antenna of the base station or repeater for mobile communication services such as IMT-2000, PCS, cellular, the front surface of the substrate 10 A plurality of radiators 20 arranged in the horizontal and vertical directions to radiate radio waves to the base station; A first reflector 30 spaced apart from the back of the substrate 10 by a support 10a to reflect radio waves radiated from the plurality of radiation elements 20 to a base station; A second reflecting plate 40 spaced apart from the rear of the first reflecting plate 30; A radio wave absorber (50) filled between the first reflecting plate (30) and the second reflecting plate (40) to absorb a lateral radiation beam and a rear radiation beam generated by the first reflection plate (30); In order to narrow the width of the omnidirectional radiation beam radiated from the plurality of radiation elements 20, each of the plurality of radiation elements 20 formed on the front surface of the substrate 10 and arranged in the horizontal and vertical directions, respectively. A power feeding element 60 for supplying electric waves and electric power of different phases; Protective cover means 70 formed in front of the plurality of radiation elements 20; It is formed in the rear of the second reflector 40, and is composed of a support 80 for supporting the entire antenna by at least one fastener (80a, 80b).

Here, the front of the cover means 70 is attached to the environment-friendly pictures, photos or advertisements.

In addition, the support 80 is composed of an insulator for shielding the weak radio wave transmitted from the first reflecting plate 30 or the second reflecting plate 40.

In addition, the support 10a is composed of an insulator for shielding weak radio waves transmitted from the first reflecting plate 30.

In addition, a PCB substrate or an air microstrip substrate may be selectively used as the substrate 10.

As shown in FIG. 5 to FIG. 7, the second embodiment according to the present invention is a single directional microstrip antenna of a base station or repeater for a mobile communication service such as IMT-2000, PCS, cellular, and the like. A plurality of radiators 20 arranged in a vertical direction to radiate radio waves to a base station; A first reflector 30 spaced apart from the back of the substrate 10 by a support 10a to reflect radio waves radiated from the plurality of radiation elements 20 to a base station; A second reflecting plate 40 spaced apart from the rear of the first reflecting plate 30; A radio wave absorber (50) filled between the first reflecting plate (30) and the second reflecting plate (40) to absorb a lateral radiation beam and a rear radiation beam generated by the first reflection plate (30); In order to suppress the lateral radiation beams radiated from the plurality of radiation elements 20, different phases are formed on each of the plurality of radiation elements 20 formed on the front surface of the substrate 10 and arranged in the vertical direction. A power feeding element 60 for supplying electric wave and power of the; Protective cover means 70 formed in front of the plurality of radiation elements 20; It is formed in the rear of the second reflector 40, and is composed of a support 80 for supporting the entire antenna by at least one fastener (80a).

Here, the front of the cover means 70 is attached to the environment-friendly pictures, photos or advertisements.

In addition, the support 80 is composed of an insulator for shielding the weak radio wave transmitted from the first reflecting plate 30 or the second reflecting plate 40.

In addition, the support 10a is composed of an insulator for shielding weak radio waves transmitted from the first reflecting plate 30.

In addition, a PCB substrate or an air microstrip substrate may be selectively used as the substrate 10.

Detailed operation of the present invention configured as described above and the operation and effect thereof will be described with reference to Figures 1 to 8 divided into the first embodiment and the second embodiment as follows.

Here, the first embodiment is applied to a multi-directional microstrip antenna of a mobile communication service base station or repeater such as IMT-2000, PCS, cellular, and the second embodiment is a base station for mobile communication service such as IMT-2000, PCS, cellular or Applied to the repeater's unidirectional microstrip antenna.

1. First embodiment

As shown in FIG. 1, the plurality of radiation elements 20 arranged in the horizontal and vertical directions on the front surface of the substrate 10 radiate or absorb radio waves.

In this case, as shown in FIG. 2, the first reflector 30 attached to the rear of the plurality of radiation elements 20 reflects or absorbs radio waves radiated from the plurality of radiation elements 20. Radio waves are reflected to the plurality of radiation elements 20.

Accordingly, the beam radiated or absorbed by the plurality of radiation elements 20 is directed by the first reflector 30 in a specific direction.

In this case, since the lateral radiation beam and the directional radiation beam as shown in FIG. 4 (b) are generated in the first reflector 30, interference is caused to other communicators.

Accordingly, by filling the radio wave absorber 50 between the first reflecting plate 30 and the second reflecting plate 40, the lateral radiation beam and the rearward radiation beam generated by the first reflecting plate 30 are absorbed. The lateral and backward radiation beams, as shown in Figure 4 (a), have a maximum suppressed radiation pattern.

That is, in the conventional microstrip antenna, when the main beam of + 20dbm is radiated in the forward direction as shown in FIG. 4 (b), the unwanted wave of + 5dbm is radiated in the lateral direction and unnecessary of + 2dbm in the rear direction. The wave is copied.

However, in the microstrip antenna of the present invention, when the main beam of + 20dbm is radiated in the omnidirectional direction as shown in FIG. 4 (a) by the wave absorber 50, unwanted waves of -10dbm or less are radiated laterally. And, since the unwanted wave of less than -40dbm in the rear direction is radiated, the difference in front and rear radiant power can be implemented to be less than -60dbm, so that the unnecessary radiation is greatly suppressed, thereby minimizing interference interference to other communication operators.

In general, when a radio wave is incident on an object, a ratio of energy absorbed by the object and incident energy is called an absorption rate. The radio wave absorber 50 refers to a material having a very high absorption rate.

As the radio wave absorber 50, a dielectric material in which expanded styrol or the like is mixed with graphite powder may be used, or a magnetic material such as ferrite may be used.

In addition, as shown in FIG. 1, a plurality of radiation elements 20 are arranged in a horizontal and vertical direction on the front surface of the substrate 10, and a plurality of radiation elements in which the power feeding element 60 is arranged in the horizontal and vertical directions are formed. By supplying different phase propagation and power to each of the elements 20, the width of the omnidirectional radiation beam radiated from the plurality of radiation elements 20 as shown in FIG. 4 (a) is narrowed.

In general, the narrower the width of the omnidirectional radiation beam, the sharper the directivity, so that radio reception of the other base station or repeater is suppressed.

In addition, the power supply element 60 is supplied to the plurality of radiation elements 20 by the radio wave and power of the same phase, respectively, as shown in Figure 4 (a) is radiated from the plurality of radiation elements 20 Narrow the width of the omnidirectional radiation beam.

Since the power supply element 60 is already known, a detailed description thereof will be omitted.

2. Second Embodiment

As shown in FIG. 5, the plurality of radiation elements 20 arranged in the vertical direction on the front surface of the substrate 10 radiate or absorb radio waves.

In this case, as shown in FIG. 6, the first reflector 30 attached to the rear of the plurality of radiation elements 20 reflects or absorbs radio waves radiated from the plurality of radiation elements 20. Radio waves are reflected to the plurality of radiation elements 20.

Accordingly, the beam radiated or absorbed by the plurality of radiation elements 20 is directed by the first reflector 30 in a specific direction.

In this case, since the lateral radiation beam and the directional radiation beam as shown in FIG. 8 (b) are generated in the first reflector 30, interference is caused to other communicators.

Accordingly, by filling the radio wave absorber 50 between the first reflecting plate 30 and the second reflecting plate 40, the lateral radiation beam and the rearward radiation beam generated by the first reflecting plate 30 are absorbed. The lateral and backward radiation beams as shown in FIG. 8 (a) have the maximum suppressed radiation pattern.

That is, in the conventional microstrip antenna, when the main beam of + 15dbm is radiated in the forward direction as shown in FIG. 8 (b), the unwanted wave of + 1dbm is radiated in the lateral direction and unnecessary of -3dbm in the rear direction. The wave is copied.

However, in the microstrip antenna of the present invention, when the main beam of + 15dbm is radiated in the omnidirectional direction as shown in FIG. 8 (a) by the wave absorber 50, unwanted waves of -15dbm or less are radiated laterally. And, since the unwanted wave of less than -45dbm in the rear direction is radiated, the difference in the front and rear radiant power can be implemented to less than -60dbm, so that the unnecessary radiation is greatly suppressed, thereby minimizing interference interference to other operators.

In addition, as shown in FIG. 5, a plurality of radiation elements 20 are arranged in a vertical direction on the front surface of the substrate 10, and a plurality of radiation elements 20 in which the power feeding element 60 is arranged in the vertical direction. By supplying electric waves and electric power of different phases to each of them, the lateral radiation beams radiated from the plurality of radiation elements 20 are suppressed as shown in FIG.

In addition, the power supply element 60 increases the gain of the omnidirectional radiation beam by supplying electric waves and power having the same phase to the plurality of radiation elements 20, respectively.

In addition, the first and second embodiments of the present invention, as shown in Figures 2 and 6, the protective cover means 70 is installed in front of the plurality of radiation elements 20, the cover Attach environmentally friendly pictures, photographs or advertisements to the front of the means 70.

The cover means 70 is insulated and waterproof, and is particularly implemented with a dielectric that transmits radio waves well to protect the plurality of radiation elements 20 from external shocks, and to harmonize with the surrounding environment. Does not give a sense of rejection.

In addition, in the first and second embodiments of the present invention, as shown in FIGS. 3 and 7, the support 80 is installed at the rear of the first reflecting plate 30 and the second reflecting plate 40. At least one fastener 80a supports the entire antenna.

At this time, the support 80 is composed of an insulator, shielding the weak radio wave transmitted from the first reflecting plate 30 or the second reflecting plate 40.

In addition, in the first and second embodiments of the present invention, as shown in FIGS. 2 and 6, the first reflector 30 is formed on the substrate 10 by the support 10a. The support 10a is formed of an insulator to shield the weak radio waves generated from the first reflecting plate 30.

In addition, in the first and second embodiments of the present invention, at least one wall mounting means 90a, 90b, 90c, 90d is provided on the rear surface of the second reflector 40 as shown in FIGS. 1 and 5. Formed.

Since the microstrip antenna configured as described above has a thickness of tens of mm or less and is light in weight, the microstrip antenna can be easily attached to the building wall by the wall mounting means 90a, 90b, 90c, and 90d without a separate installation structure.

In addition, the first embodiment and the second embodiment of the present invention can generate the vertical polarization or horizontal polarization or circular polarization or double polarization by variously configuring the plurality of radiation elements 20.

In addition, in the first and second embodiments of the present invention, the plurality of radiation elements 20 may be configured as a multilayer radiation element.

Further, the first and second embodiments according to the present invention, when the sideband and the front and rear ratio is 60db or less or less (for example 50 to 40db), the first reflector 20 and the second reflector 40 The antenna may be configured without charging the electromagnetic wave absorber 50 between them.

As described above, in the present invention, in the multi-directional microstrip antenna of a base station or repeater for mobile communication service, the radio wave absorber 50 is charged between the first reflecting plate 30 and the second reflecting plate 40, thereby providing By suppressing the lateral radiation beam and the radiation radiation beam which is radiated, it is effective in minimizing interference interference to other communicators.

In addition, in the multi-directional microstrip antenna of a base station or repeater for a mobile communication service, the present invention arranges a plurality of radiating elements 20 in a horizontal and vertical direction and has a different phase in each of the plurality of radiating elements 20. It is effective in suppressing radio wave reception of another base station or other repeater by supplying electric wave and power of N and narrowing the width of the omnidirectional radiation beam radiated from the antenna.

In addition, the present invention is a unidirectional microstrip antenna of a base station or repeater for a mobile communication service, the lateral radiation beam is charged from the antenna by charging the radio wave absorber between the first reflecting plate 30 and the second reflecting plate 40 By suppressing the back and forth radiation beams, it is effective in minimizing interference interference to other carriers.

In addition, the present invention provides a single directional microstrip antenna of a base station or repeater for a mobile communication service, in which a plurality of radiation elements 20 are arranged in a vertical direction and propagated in different phases to each of the plurality of radiation elements 20. By suppressing the lateral radiation beam radiated from the antenna by supplying the power and the power, it is effective in minimizing interference interference to other operators.

Claims (13)

In the multi-directional microstrip antenna of the base station or repeater for mobile communication service, A plurality of radiation elements arranged in a horizontal and vertical direction on the front surface of the substrate to radiate radio waves; A first reflection plate formed at a rear of the substrate and reflecting radio waves radiated from the plurality of radiation elements; A second reflector formed to be spaced apart from the rear of the first reflector; An unnecessary radiation suppression type microstrip antenna, which is filled between the first reflecting plate and the second reflecting plate, absorbs a lateral radiation beam and a backward radiation beam generated by the first reflection plate. . The method of claim 1, In order to narrow the width of the omnidirectional radiation beam radiated from the plurality of radiation elements, further comprising a feeding element for supplying power and propagation of different phases to each of the plurality of radiation elements arranged in the horizontal and vertical directions An unnecessary radiation suppression type microstrip antenna, characterized in that. The method of claim 1, In order to narrow the width of the omnidirectional radiation beam radiated from the plurality of radiation elements, further comprising a feeding element for supplying power and propagation of the same phase to each of the plurality of radiation elements arranged in the horizontal and vertical direction An unnecessary radiation suppression type microstrip antenna, characterized in that. In the unidirectional microstrip antenna of the base station or repeater for mobile communication service, A plurality of radiating elements arranged in a vertical direction on the front surface of the substrate to radiate radio waves to subscriber stations in the service area; A first reflector formed at a rear of the substrate and reflecting radio waves radiated from the plurality of radiation elements to a subscriber station in a service area; A second reflector formed to be spaced apart from the rear of the first reflector; And an electromagnetic wave absorber charged between the first reflecting plate and the second reflecting plate to absorb a lateral radiation beam and a rear radiation beam generated by the first reflection plate. The method of claim 4, wherein In order to suppress the lateral radiation beams radiated from the plurality of radiators, it characterized in that it further comprises a feeding element for supplying power and propagation of a different phase to each of the plurality of radiators arranged in the vertical direction An unnecessary radiation suppression type microstrip antenna. The method of claim 4, wherein In order to increase the gain of the omnidirectional radiation beam radiated in the omnidirectional radiation from the plurality of radiation elements, further comprising a feeding element for supplying power and propagation of the same phase to each of the plurality of radiation elements arranged in the vertical direction; An unnecessary radiation suppression type microstrip antenna, characterized in that configured. The method according to any one of claims 1 to 4, An unnecessary radiation suppression type microstrip antenna, characterized in that it further comprises a protective cover means formed in front of the plurality of radiation elements. The method of claim 7, wherein An unnecessary radiation wave suppression type microstrip antenna, characterized in that an environmentally friendly picture, photograph or advertisement is attached to the front surface of the cover means. The method according to any one of claims 1 to 4, It is formed on the rear of the second reflector, and further comprises a support for supporting the entire antenna by at least one fastener, The support, The unnecessary radiation suppressing microstrip antenna, characterized in that the insulator for shielding the weak radio wave transmitted from the first reflector or the second reflector. The method according to any one of claims 1 to 4, And a support for supporting the substrate on the first reflecting plate. The support, An unwanted radiation suppressing microstrip antenna, characterized in that it is an insulator for shielding weak radio waves transmitted from the first reflecting plate. The method according to any one of claims 1 to 4, At least one wall mounting means is formed on the rear surface of the second reflecting plate, And an unnecessary radiation suppression type microstrip antenna, wherein the entire antenna can be attached to a building wall by the wall mounting means. The method according to any one of claims 1 to 4, The plurality of radiation elements are configured in various ways, An unwanted radiation suppressed microstrip antenna, characterized by generating vertical polarization or horizontal polarization or circular polarization or double polarization. The method according to any one of claims 1 to 4, And said plurality of radiating elements comprise a multi-layered radiating element.