KR100327450B1 - A micro strip antenna and a manufacturing method thereof - Google Patents

Abstract

The microstrip antenna of the present invention comprises a first feed patch having a first filtration patch, a feed patch and a feed line, the first filtration patch filters radio waves to transmit and receive, and the feed patch receives radio waves filtered by the first filtration patch. Absorbing or radiating radio waves, the first feeding portion is formed on the same plane as the feeding patch, and transmits the radio waves to be absorbed or radiated from the feeding patch to the feeding patch, the first filtration patch and the first feeding There are a plurality of parts, and the surface on which the first feed part is formed and the surface on which the first filtration patch is formed are spaced apart from each other. The microstrip antenna of the present invention can reduce the manufacturing cost of the antenna by allowing the material of the antenna element to use a variety of materials, and can freely form the structure of the antenna element by not using capacitive coupling between the antenna elements In addition, since the antenna structure can be freely formed, transmission and reception frequency bands can be extended.

Description

Microstrip antenna and its manufacturing method {A MICRO STRIP ANTENNA AND A MANUFACTURING METHOD THEREOF}

The present invention relates to an antenna for transmitting and receiving high frequency signals and a method of manufacturing the same, and more particularly, to a microstrip antenna and a method of manufacturing the same.

Microstrip antennas have the advantages of small size, weight, and relatively low cost, which are used in a wide range of applications, such as antennas for receiving satellite broadcasts in the bands of several tens of gigabytes, antennas for satellite communication, and wireless relay communication equipment.

In a conventional microstrip antenna, the components of the antenna are formed by capacitive coupling. In the capacitively coupled antenna component, the dielectric constant of the material determines the transmission, reception efficiency, and antenna structure of the antenna. For this reason, the conventional microstrip antenna uses expensive materials such as Duroid, Teflon, and Nomex having good dielectric constant.

Therefore, there is a problem in selecting a material of the antenna component, and there is also a problem in that the manufacturing cost increases.

In addition, since the structure of the antenna is determined according to the dielectric constant of the antenna material, there is a problem in that the shape or size of the antenna component is restricted.

In addition, since the frequency band is narrow and the side lobes are large, there is a problem that the efficiency of the antenna is lowered.

The present invention has been made to solve such a problem, and an object of the present invention is to freely form the structure of an antenna element by not using capacitive coupling.

Further, another object of the present invention is to reduce the manufacturing cost of the antenna by allowing the material of the antenna element to be used in various materials.

It is also aimed at increasing the efficiency of the antenna by reducing the side lobes.

Another object of the present invention is to extend the transmit and receive frequency bands.

1 shows a microstrip antenna according to a first embodiment of the present invention.

2A-2H illustrate various filtration patches of a microstrip antenna according to a first embodiment of the present invention.

3A to 3B illustrate a feed patch and a feed line of a micro strip antenna according to the first embodiment of the present invention.

4 is a plan view of a microstrip antenna according to the first embodiment of the present invention.

Fig. 5 shows a waveguide of the microstrip antenna according to the first embodiment of the present invention.

Fig. 6 shows a microstrip antenna of the second embodiment of the present invention.

Fig. 7 is a sectional view of the micro strip antenna of the second embodiment of the present invention.

Figure 8 is a plan view of a microstrip antenna of the second embodiment of the present invention.

9 shows a microstrip antenna according to a third embodiment of the present invention.

10 is a cross-sectional view of the microstrip antenna according to the third embodiment of the present invention.

The microstrip antenna of the present invention comprises a first feed patch having a first filtration patch, a feed patch and a feed line, the first filtration patch filters radio waves to transmit and receive, and the feed patch receives radio waves filtered by the first filtration patch. Absorbing or radiating radio waves, the first feeding portion is formed on the same plane as the feeding patch, and transmits the radio waves to be absorbed or radiated from the feeding patch to the feeding patch, the first filtration patch and the first feeding There are a plurality of parts, and the surface on which the first feed part is formed and the surface on which the first filtration patch is formed are spaced apart from each other.

In addition, a second filtration patch formed on the lower portion of the first filtration patch and the first feed portion, and filters the transmission and reception radio waves; A feed patch formed at the lower portion of the second filtration patch and absorbing or radiating the radio waves filtered by the second filtration patch, formed on the same plane as the feed patch, and transmitting or radiating the radio wave absorbed by the feed patch. It may further include a second feeder having a feeder line for transmitting to the feeder patch.

And an insulating layer formed between the first filtration patch and the first feed part and the second filtration patch and the second feed part to isolate the propagation of the first filtration patch and the propagation of the second filtration patch. desirable.

Further, several first filtration patches and the first feed part and the second filtration patch and the second feed part may be formed at an angle with the insulating layer at an angle.

In addition, the plurality of feed lines may be separated into several groups, connected and terminated, and may further include waveguides formed at ends of the feed lines of the plurality of groups to guide the radio waves transmitted through the plurality of feed lines to the outside. ,

The waveguide is a tube in which a lower portion of a rectangular parallelepiped is formed at an upper portion of a surface where the first and second feed portions at positions where the ends of the first and second groups of feed lines face each other, are empty. desirable.

The method for manufacturing a microstrip antenna of the present invention forms a plurality of first filtration patches for filtering radio waves transmitted and received, and forms a plurality of first feed patches for absorbing or radiating radio waves transmitted and received, and then transmits radio waves. A first feed line of is formed on the same plane as the plurality of feed patches.

In addition, a plurality of second filtration patches for filtering the radio waves transmitted and received in the lower portion of the surface formed with a plurality of first feed patch and the second feed line, and absorbs or radiates the radio waves transmitted and received under the plurality of second filtering patches After forming a plurality of second feed patches, a plurality of second feed lines for transmitting radio waves may be formed on the same plane on which the plurality of second feed patches are formed.

The method may further include forming a rectangular waveguide for guiding the radio wave transmitted through the first and second feed lines to the outside at the end of the plurality of first feed lines and the second feed line. ,

Preferably, an insulating layer is formed between the plurality of first feed patches and the first feed line and the plurality of second filter patches to respectively isolate radio waves absorbed or radiated from the first filter patch and the second filter patch,

The first filter patch and the first feed patch are preferably formed to be inclined at a predetermined angle with the insulating layer.

The number of connected feed lines of the plurality of first feed lines and the second feed line may be asymmetrically connected.

Hereinafter, a first preferred embodiment of the present invention will be described in detail with reference to the drawings.

1 shows a microstrip antenna according to a first embodiment of the present invention.

2A-2D illustrate various filtration patches of a microstrip antenna according to a first embodiment of the present invention.

3 is a cross-sectional view of the microstrip antenna according to the first embodiment of the present invention.

4A to 4C illustrate a feed patch and a feed line of a micro strip antenna according to the first embodiment of the present invention.

Fig. 5 shows a waveguide of the microstrip antenna according to the first embodiment of the present invention.

As shown in FIG. 1, the microstrip antenna of the present invention has a feed patch layer formed with a filtration patch layer P1, an insulating layer P2, P4, a feed patch 21, and a feed line 22 formed thereon. Layer P3.

The insulating layer P2 is formed under the filtration patch layer P1, the feed layer P3 is formed under the insulating layer P2, and the insulating layer P4 is formed under the feed layer P3. The antenna support P9 is formed below the insulating layer P4. The filtration patch layer P1 has a plurality of filtration patches 10, and the feed layer P3 has a feed patch 21 and a feed line 22.

Hereinafter, an operation and a manufacturing method of the microstrip antenna according to the present embodiment will be described with reference to the drawings.

In the following, the radio wave reception operation will be mainly described. However, since the transmission operation is described as a reverse process of the reception operation, the description thereof will be omitted.

First, radio waves received at the antenna are input to the filtration patch 10. The microstrip antenna of this embodiment is an antenna operating in the band of several GHz to several tens of GHz.

Propagation is classified into circularly polarized wave, vertically polarized wave, and horizontally polarized wave according to the direction of movement in the vertical direction of the propagation direction. The vertically polarized wave is perpendicular to the traveling direction. A horizontal polarized wave is a propagated wave moving horizontally with respect to a traveling direction, and a circular polarized wave is a propagated wave moving in a circular direction from a vertical plane with respect to the propagation direction of the wave, and clockwise in a circular polarized wave. There are circular polarizations moving in the direction of the polarization and anti-clockwise circular polarizations. The transmission signal can transmit radio waves containing a mixture of circular polarization, vertical polarization, and horizontal polarization, thereby improving signal transmission efficiency. When a reception antenna filters and receives a radio wave of a desired waveform, only a desired signal can be received. .

As shown in Figures 2a to 2d, there are a variety of filtration patch 10, according to the shape of the filtration patch 10 can be received by filtering the polarization contained in the received wave.

Fig. 2A is a filtration patch for filtering horizontal polarization, Fig. 2B is a filtration patch for filtering horizontal polarization, and Figs. 2C and 2D are right-hand circularly polarized clockwise polarizations in the direction of travel, respectively. A filtration patch that filters left-hand circularly polarized counterclockwise. The shape of the filtration patch can be varied. Figures 2e-2h show a modified form of the filtration patch for filtering circular polarization.

3A and 3B show filtration patches formed by overlapping a plurality of the first embodiment of the present invention.

The filtration patch shown in Figs. 3A and 3B is a filtration patch for filtering two kinds of radio waves.

That is, the filtration patch shown in FIG. 3A is a filtration patch for filtering horizontal polarization and vertical polarization. A horizontal polarization filtration patch H1 is formed below the vertical polarization filtration patch V1, and the horizontal polarization filtration patch H1 is formed. Connect the horizontally polarized filtration patch (H2) and the vertically polarized filtration patch (V2) to both sides of the lower part of. The filtration patch filters the vertical polarization and the horizontal polarization and outputs them through the vertical polarization filtration patch V2 and the horizontal polarization filtration patch H2 formed at the bottom thereof.

The filter patch shown in FIG. 3B is a filter patch for filtering the circularly polarized clockwise polarization and the counterclockwise polarized polarization. The structure and operation are the same as those in FIG. In addition, it can be understood by those skilled in the art that different kinds of radio waves to be filtered can be configured.

The feeding part 20 including the filtration patch 10, the feeding patch 21, and the feeding line 22 of this embodiment is formed as shown in Figs. 4A and 4B.

In FIG. 4A, an insulating layer P2 is formed to space between the filtration patch 10 and the feed section 20 including the feed patch 21 and the feed line 22.

The feed patch 21 and the feed line 22 are formed in the feed layer P3 coplanar, and the filtration patch 10 is formed in the filtration patch layer P1, and the filtration patch layer P1 and the feed layer P3 are provided. ) Are spaced apart from those described above, and the insulating layer P2 is for spaced apart from each other.

4B is formed by directly contacting the feeding part 20 including the filtration patch 10 and the feeding patch 21 and the feeding line 22.

Radio waves filtered by the filtration patch 10 are transmitted through the insulating layer P2 to the power feeding patch 21 at the bottom of the filtration patch 10. The insulating layer P2 is for spacing between the filtration patch 10 and the feeding patch 21, and the interval between the filtration patch 10 and the feeding patch 21 is preferably a constant multiple of the reception propagation wavelength. . This is to increase the transmission and reception efficiency of radio waves.

The feeding patch 21 receives the radio wave filtered by the filtration patch 10. The feed patch 21 transmits the received radio waves to the feed line 22, and the received radio waves are transmitted through the feed line 22.

The feed patch 21 is formed on the same plane as the feed line 22. The feed patch 21 and the feed line 22 are formed in various ways. Since the feed patch 21 and the feed line 22 are not formed by capacitive coupling, as shown in FIGS. 5A to 5C, the shape and the connection form can be variously changed. That is, in the conventional micro strip antenna, the feed patch 21 and the feed line 22 are formed by capacitive coupling, so that the dielectric constant of the material has a decisive influence on the efficiency of the antenna. Had to choose. In addition, this led to limitations in the structure of the feed patch and feed line.

However, in the microstrip antenna of this embodiment, since the feed patch 21 and the feed line 22 are not formed by capacitive coupling, the material of the feed patch 21 and the feed line 22 can also be variously used. In this embodiment, PET (poly ethylen) is used for the feed patch 21 and the feed line 22. In this embodiment, since the dielectric constant of the material does not affect the formation of the structure, a cheap material other than PET can be used as the material for the feed patch and the feed line.

In addition, due to this, the connection of the feed patch 21 and the feed line 22 may also be variously formed.

That is, the feed patch 21 and the feed line 22 may be connected without contact as shown in FIG. 5A, or may be connected in a single body form as shown in FIGS. 5B and 5C. In addition, as illustrated in FIG. 5C, the feeder part 21 including the feeder patch 21 and the feeder line 22 may be connected in an asymmetrical form.

As described above, since the feed patch 21 and the feed line 22 can be configured in various forms, the transmission / reception frequency band of the microstrip antenna can be extended.

Radio waves received from the feed patch 21 and transmitted through the feed line 22 are transmitted to the waveguide 30 formed in the feed layer P3. The structure and operation principle of the waveguide 30 are as follows.

As shown in FIGS. 5A to 5C, the feed lines 22 of the plurality of feed units 20 are divided into several groups, and the connection ends of the feed lines of each group are waveguides 30 formed in the feed layer P3. Terminates at).

6A and 6B are waveguides of the micro strip antenna according to the first embodiment of the present invention.

6A shows one waveguide, and FIG. 6B shows two waveguides formed vertically.

As shown in FIG. 6A, the waveguide 30 formed as one is a rectangular tube having a slit S formed at a point where the feed line 22 meets the circular hole H and the feed layer P3. The lower part of the waveguide 30 is empty and is connected to the external waveguide through the lower part.

As shown in Fig. 6B, the two waveguides are vertically crossed with two waveguides. The two formed waveguides separate the radio waves of different frequency bands or different kinds of waves and allow guiding to the outside.

In addition, it will be understood by those skilled in the art that the number and shape of waveguides may be changed.

Hereinafter, the operation principle of the waveguide formed as one will be described.

The waveguide 30 guides the received radio wave transmitted through the feed line to an external waveguide.

As shown in FIG. 5, in the termination form of the feeder group in the waveguide 30, the end of the feeder line is asymmetrically formed, and the feeder end L2 of the other end of the feeder line L1 is different. Of the wavelength than the length of As big as it is desirable. This is to increase the transmission efficiency of radio waves transmitted to the outside through the waveguide 30. That is, at the point where the feeder ends meet, the radio wave transmitted through one feeder terminal L1 and the radio wave transmitted through the other feeder terminal L2 have a phase difference of 180 °, and the radio wave of each feeder terminal is transmitted to the other feeder. When the phase is incident on the terminal, the phase is converted to 180 degrees, so that the electric wave output from the end of each feed line to the external waveguide increases in amplitude and increases transmission efficiency.

The microstrip antenna of the first embodiment of the present invention can reduce the material cost of the antenna element and can variously modify the shape of the feed patch and feed line. Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 7 shows a microstrip antenna of the second embodiment of the present invention.

Fig. 8 is a sectional view of the micro strip antenna of the second embodiment of the present invention.

As shown in FIG. 8, the microstrip antenna according to the second embodiment of the present invention includes a filtration patch layer P1, a feeding layer P3, an insulating layer P2 and P4, and an antenna support P5. . As shown in Fig. 8, the filtration patch layer P1, the feed layer P3, and the insulating layers P2 and P4 are formed of one body, and a part of the body is with respect to the antenna support P5. It is formed at an angle of inclination. As shown in Fig. 4, the feed lines 22 of the inclined body are connected as one and connected to the feed lines 22 on the antenna support P5, and the feed lines on the antenna support P5 are as in the first embodiment. Several groups are connected to the waveguide 30.

9 is a plan view of a microstrip antenna of the second embodiment of the present invention.

As shown in Fig. 9, the microstrip antenna of this embodiment is formed by dividing the filtration patch layer P1, the feed layer P3, and the insulation layers P2, P4 into a plurality of bodies. Each body may be formed at various angles with respect to the antenna support P9 to receive or transmit radio waves at various angles.

The microstrip antenna of the second embodiment of the present invention can transmit and receive radio waves transmitted at various angles with respect to the antenna.

Hereinafter, a third embodiment of the present invention will be described in detail with reference to the drawings.

10 illustrates a microstrip antenna according to a third embodiment of the present invention.

11 is a sectional view of a microstrip antenna according to a third embodiment of the present invention.

As shown in FIG. 10, the microstrip antenna according to the third embodiment of the present invention includes a first filtration patch layer P1, a first feed layer P3, a second filtration patch layer P5, and a second feed layer. (P7), insulating layers P2, P4, P6, and P8 are included.

As shown in Fig. 11, the microstrip antenna of this embodiment includes two antennas ANT1, ANT2, insulating layers P4, P8, and antennas formed by overlapping antennas of the first and second embodiments in a pair. The support base P9 is overlapped and formed. That is, the antenna ANT1 includes the first filtration patch layer P1, the second feed layer P3, and the insulating layer P2, and the insulating layer P2 is disposed under the first filtration patch layer P1. The first feed layer P3 is formed under the insulating layer P2. The antenna ANT2 includes a second filtration patch layer P5, a second feed layer P7, and an insulation layer P6, and an insulation layer P6 is formed below the second filtration patch P5. The second feed layer P7 is formed under the insulating layer P6. There is an insulating layer P4 between the antenna ANT1 and the antenna ANT2, and an insulating layer P8 between the antenna ANT2 and the antenna support P9.

As shown in FIG. 11, the first filtration patch 10 is formed in the first filtration patch layer P1, and the first feed patch 21 and the first feed line 22 are formed of the first feed layer P3. The second filtration patch 30 is formed in the second filtration patch layer P5, and the second feed patch 41 and the second feed line 42 are formed in the second feed layer P6.

In addition, the connection relationship of the 1st feed patch 21, the 1st feed line 22, the 2nd feed patch 41, and the 2nd feed line 42 is the same as that of 1st, 2nd embodiment.

In this embodiment, by forming the antenna in pairs, it is possible to simultaneously transmit and receive various types of radio waves. That is, the first filtration patch 10 formed on the first filtration patch layer P1 of the antenna ANT1 and the second filtration patch 31 formed on the first filtration patch layer P2 of the antenna ANT2 are illustrated in FIG. 2A. If different filtration patches are used among the filtration patches shown in FIG. 2D, the antenna ANT1 and the antenna ANT2 may transmit and receive different kinds of radio waves, respectively. For example, if the first filtration patch 10 uses the horizontally polarized filtration patch of FIG. 2A and the second filtration patch 30 uses the vertically polarized filtration patch of FIG. 2C, the antenna ANT1 is horizontal. Polarization is transmitted and received, and the antenna ANT2 transmits and receives vertical polarization.

The radio wave transmission principle of the feeder and the feed patch and the waveguide guiding principle of the waveguide of this embodiment are the same as those of the first and second embodiments.

Since the microstrip antenna of the third embodiment of the present invention can simultaneously transmit and receive various types of radio waves, it is possible to increase the efficiency of the antenna.

The present invention is not limited to the above-described embodiments, but various modifications are possible within the scope without departing from the technical scope and spirit of the present invention.

The microstrip antenna of the present invention can reduce the manufacturing cost of the antenna by allowing the material of the antenna element to use a variety of materials.

In addition, the structure of the antenna element can be freely formed by not using capacitive coupling for the coupling between the antenna elements.

In addition, since the antenna structure can be freely formed, transmission and reception frequency bands can be extended.

Claims (16)

A first filtration patch for filtering radio waves transmitted and received; A feed patch that absorbs or radiates radio waves filtered by the first filtration patch, and a feed line which is formed on the same plane as the feed patch, and which delivers radio waves absorbed or transmitted by the feed patch to the feed patch Microstrip antenna comprising a first feeder having a. In claim 1, A second filtration patch formed under the first filtration patch and the first feeding part and filtering transmission and reception radio waves; A feed patch formed at a lower portion of the second filtration patch and absorbing or radiating radio waves filtered by the second filtration patch, formed on the same plane as the feed patch, and delivering radio waves absorbed by the feed patch; A second feeding part having a feeding line for transmitting radio waves to be radiated to the feeding patch; Microstrip antenna further included. In claim 2, And an insulating layer formed between the first filtration patch and the first feed part and the second filtration patch and the second feed part to isolate the propagation of the first filtration patch and the propagation of the second filtration patch. Micro strip antenna. In claim 3, The several first filtration patches, the first feed portion and the second filtration patch and the second feed portion are formed at an angle with the insulating layer at an angle. Micro strip antenna. In paragraph 3, The plurality of feed lines are separated into several groups, connected and terminated, and formed at the end of the feed lines of the plurality of groups to guide waveguides externally guiding radio waves transmitted through the plurality of feed lines. Microstrip antenna further included. In claim 5, The waveguide is. A microstrip is formed in the upper part of the surface formed with the first and the second feed part in the position where the end of the feed group of the first group and the feed line of the second group of the several groups of feed lines facing each other, the lower part of the rectangular parallelepiped tube antenna. In claim 6, The end of the first group feed line has a wavelength of radio waves than that of the end of the second group feed line. Micro strip antenna, characterized in that as long as. In claim 7, The waveguide is, A microstrip antenna, which is formed vertically and includes two waveguides, each of which is connected to a feed line of a different group and guides outward radio waves transmitted from the feed lines of each group. In claim 8, The microstrip antenna of which the number of feed lines and feed patches of the first and second feed units is asymmetrically formed. In claim 9, And the feed line and the feed patch are in contact with each other and connected to one body. Forming a plurality of first filtration patches for filtering the transmitted and received radio waves; Forming a plurality of first feed patches that absorb or radiate radio waves transmitted and received; Forming a plurality of first feed lines that transmit radio waves on the same plane as the plurality of feed patches; Microstrip antenna manufacturing method comprising the. In claim 11, Forming a plurality of second filtration patches for filtering radio waves transmitted and received on a lower surface of the plurality of first feed patches and a second feed line; Forming a plurality of second feed patches that absorb or radiate radio waves transmitted and received under the plurality of second filtering patches; Forming a plurality of second feed lines for transmitting radio waves on the same plane on which the plurality of second feed patches are formed Micro strip antenna manufacturing method further comprising. In claim 12, And forming a rectangular waveguide for guiding the radio wave transmitted through the first and second feed lines to the outside at the end of the plurality of first feed lines and the second feed line. Manufacturing method. In claim 13, Forming an insulating layer between the plurality of first feed patches and the first feed line and the plurality of second filter patches to respectively isolate radio waves absorbed or radiated from the first filter patch and the second filter patch. Micro strip antenna manufacturing method further comprising. The method of claim 14, Forming the first filtering patch, the first feed patch is a microstrip antenna is formed to be inclined at a predetermined angle with the insulating layer. The method of claim 15, And asymmetrically connecting the number of connected feed lines of the plurality of first feed lines and second feed lines.