KR102018083B1 - Uwb patch array antenna device - Google Patents

Abstract

The present invention relates to a wideband patch array antenna device. The wideband patch array antenna device has a symmetrical structure in which two mutually opposing subarrays are mirrored, and provides a 180 degree phase inverter of a feed network of the subarrays. The wideband patch array antenna device ensures a small form factor, and keeps the gain of an antenna high while miniaturizing the antenna size, thereby improving the performance in the wideband operation.

Description

Wideband Patch Array Antenna Unit {UWB PATCH ARRAY ANTENNA DEVICE}

The present invention relates to a wideband patch array antenna device, and more particularly to a 2x2 wideband patch array antenna device having a high directivity, a small form factor, and a miniaturized chip size.

Recently, as the desire to transmit and receive a greater amount of information through a mobile communication terminal has increased, interest in a much higher frequency band is increasing compared to the existing frequency band for mobile communication.

The important thing in such a mobile communication service is stable call quality, and the characteristics of antennas installed in each base station and repeater are one of many factors that determine call quality.

Antennas for repeaters and base stations currently in use are mainly dipole structures and microstrip structures. Among them, the microstrip antenna has the advantages of being easy to manufacture, mass-produced, rugged, inexpensive, small in size and light in weight, while having a narrow bandwidth and low efficiency. It is a disadvantage.

Many studies have been conducted to improve the narrowband characteristics of the microstrip antenna, and various methods have been proposed. In general, methods for increasing the bandwidth of a microstrip antenna include a method of lowering the dielectric constant of the substrate, a method of increasing the thickness of the substrate, and the like. However, there is a limit to lowering the dielectric constant of the actual substrate, not only increases the manufacturing cost of using the substrate, but also causes dielectric loss. In addition, as the thickness of the substrate increases, the bandwidth increases, but the surface wave increases, which decreases the efficiency and causes distortion of the pattern. In addition, there is a method of modifying the shape of a patch, a method of adding a parasitic element, a stacked structure, or the like.

However, these structures must increase the physical size of the same plane or different layers, increase the manufacturing cost of using multiple patches, and complicated tuning and difficulty compared to a single patch when implementing an array antenna. Have

In general, to design an array antenna, all elements must have the same electromagnetic field polarity. However, the arrangement in a general structure creates a problem of a feeding network. In particular, there is a disadvantage in that low gain and bulkiness are required for wideband operation.

Republic of Korea Patent Publication No. 10-2015-0006839 (published 2015.01.19.) U.S. Patent Publication No. 8,830,133 (Registration date 09.09.09) Japanese Laid-Open Patent Publication No. 2015-164272 (published 2015.09.10.)

The broadband patch array antenna device according to the present invention has the following problems.

First, the broadband patch array antenna device of the present invention is intended to have a high directivity and small form factor and chip size.

Second, the broadband patch array antenna device of the present invention is intended to facilitate the manufacture by forming a phase inverter with a geometric structure.

Third, the broadband patch array antenna device of the present invention is intended to implement an antenna for wideband wireless communication by securing a high gain.

The problem of the present invention is not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

To achieve the above objects, the broadband patch array antenna device of the present invention has a symmetrical structure in which a plurality of mutually opposing sub-arrays are mirrored with each other, and includes a 180 ° phase inverter of a feed network of the sub-array. . As described above, the broadband patch array antenna device of the present invention enables high directivity, a small form factor, and a small chip size to implement a wideband antenna device for various purposes.

Broadband patch array antenna device of the present invention according to this aspect, the signal surface is formed on the upper surface and the ground surface is formed on the lower surface; First and second sub-arrays formed on the substrate and electrically connected to each other by the signal plane and mirrored to each other; A feed port electrically connected to the signal plane and the ground plane at one side of the substrate; And a phase inverter formed on the signal surface between any one of the first and second sub arrays and the feed port to shift a phase between the first and second sub arrays by 180 degrees.

In one embodiment of this aspect, each of the first and second sub arrays is provided with 1 × 2 patch antennas symmetrically; The wideband patch array antenna device is N × N (N is a positive integer of 2 or more) wideband patch array antenna device.

In another embodiment, the phase inverter; First and second signal surfaces which are separated from each other by a predetermined distance, and are formed of a plurality of protrusions and recesses to be inserted adjacent to each other and are inserted adjacent to each other; First and second ground planes in which the ground planes are separated from each other in correspondence with the first and second signal planes and spaced apart from each other by a predetermined distance; And a plurality of vias in which the first signal plane and the second ground plane are coupled to each other, and the second signal plane and the first ground plane are coupled to each other.

In another embodiment, the ground plane; First and second ground planes having a width of a predetermined size on the lower surface of the substrate and spaced apart from each other to form a rectangular pattern; And a width of a predetermined size, disposed between the first and second ground planes, spaced apart from each of the first and second ground planes, and having one end of the first and second ground planes. And a third ground plane electrically connected to the central portion, the other end of which is electrically connected to the feed port.

In this embodiment, the third ground plane; It extends a predetermined interval in one direction from the other end, and the extended portion is formed to be tapered in the vertical direction up and down has a tapering shape by the exponential design so that one end is connected to each of the first and the second ground plane.

In this embodiment, the signal plane is formed on an upper surface of the substrate opposite the third ground plane so that the first and second sub-arrays are balanced with each other in a vertically balanced symmetry. Is electrically connected by.

In yet another embodiment, the broadband patch array antenna device; And a reflector fixedly installed to be spaced apart from the lower portion of the substrate by using a plurality of plastic screws.

In this embodiment, the reflector is provided with a metal reflector, the upper surface of which is covered with metal and reflects all electromagnetic fields emitted on the first and second sub-arrays on the substrate.

Another feature of the invention provides a 2 × 2 wideband patch array antenna device.

The 2 x 2 broadband patch array antenna device of the present invention comprises: a substrate having a signal surface formed on an upper surface and a ground surface formed on a lower surface; A first sub array in which a 1 × 2 patch antenna is formed on the substrate so as to be symmetrical with each other and electrically connected to each other by the signal plane; A second sub array in which a 1 × 2 patch antenna is formed on the substrate so as to be mutually symmetrical to each other, electrically connected to each other by the signal plane, and mutually mirrored and symmetric with the first sub array; A feed port electrically connected to the signal plane and the ground plane at one side of the substrate; A phase inverter formed on the signal surface between the second sub array and the feed port to shift a phase between the first and second sub arrays by 180 degrees; And a reflector fixedly spaced apart from the lower portion of the substrate and reflecting all electromagnetic fields emitted on the first and second sub-arrays.

In one embodiment of this aspect, the ground plane; First and second ground planes having a width of a predetermined size on the lower surface of the substrate and spaced apart from each other to form a rectangular pattern; And a width of a predetermined size, disposed between the first and second ground planes, spaced apart from each of the first and second ground planes, and having one end of the first and second ground planes. It is electrically connected to the central portion, the other end is electrically connected to the feed port, and the other end is extended by a predetermined distance in one direction from the other end, the extended portion is formed to be tapered in the up and down inward direction so that one end is the first and second And a third ground plane having a tapering shape by an exponential design to be connected to each ground plane.

In this embodiment, the signal plane is formed on an upper surface of the substrate opposite the third ground plane so that the first and second sub-arrays are balanced with each other in a vertically balanced symmetry. Is electrically connected by.

In another embodiment, the phase inverter; First and second signal surfaces which are separated from each other by a predetermined distance, and are formed of a plurality of protrusions and recesses to be inserted adjacent to each other and are inserted adjacent to each other; Fourth and fifth ground planes in which the ground planes are separated from each other in correspondence with the first and second signal planes and spaced apart from each other by a predetermined distance; And a plurality of vias in which the first signal plane and the fifth ground plane are coupled to each other, and the second signal plane and the fourth ground plane are coupled to each other.

In another embodiment, the reflector is provided with a metal reflector, the top surface of which is covered with metal to reflect all electromagnetic fields emitted on the first and second sub-arrays on the substrate.

In this embodiment, the reflector is fixedly spaced apart from the lower portion of the substrate by using a plurality of plastic screws.

The broadband patch array antenna device according to the present invention has the following effects.

First, since the present invention has a high directionality, it can be used at a wide band frequency of 3.5 GHz, and can be used as a signal transceiver for a wideband radar widely used to detect human presence for rescue operations in natural disasters.

Secondly, the present invention ensures a small form factor and can achieve the highest performance compared to other structures of a wideband 2x2 patch array antenna.

Third, the present invention can satisfy the needs of various mobile communication terminals by minimizing the antenna size while maintaining the gain of the antenna, and enables wideband operation.

The effects of the present invention are not limited to those mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a plan view showing the configuration of a 2 × 2 broadband patch array antenna device according to the present invention,
2 to 4 are views for explaining the electric field direction of the 2 × 2 broadband patch array antenna device shown in FIG.
FIG. 5 is a rear view of the 2 × 2 broadband patch array antenna device shown in FIG. 1;
6 is a view showing a ground plane structure of the 2 × 2 broadband patch array antenna device shown in FIG.
7 is a view showing the structure of the phase shifter of the 2 × 2 broadband patch array antenna device shown in FIG.
8 is a waveform diagram illustrating a phase difference of the phase shifter illustrated in FIG. 7;
9 is a side view of the 2 × 2 wideband patch array antenna device shown in FIG. 1, and
10 is an actual fabricated view of a 2 × 2 broadband patch array antenna device according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art can easily understand, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, the same or similar parts are represented using the same reference numerals in the drawings.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a,” “an,” and “the” include plural forms as well, unless the phrases clearly indicate the opposite.

As used herein, the meaning of "comprising" embodies a particular property, region, integer, step, operation, element, and / or component, and other specific properties, region, integer, step, operation, element, component, and / or It does not exclude the presence or addition of groups.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Terms defined in advance are additionally interpreted to have a meaning consistent with the related technical literature and the presently disclosed contents, and are not interpreted in an ideal or very formal sense unless defined.

The broadband patch array antenna device of the present invention has a symmetrical structure in which two mutually opposing subarrays are mirrored, and includes a 180 degree phase inverter of the feed network of the subarrays.

The broadband patch array antenna device of the present invention ensures a small form factor and can keep the gain of the antenna high while minimizing the antenna size, thereby improving performance in broadband operation.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a plan view showing the configuration of a 2 x 2 broadband patch array antenna device according to the present invention.

Referring to FIG. 1, in the broadband patch array antenna device 100 of the present invention, a plurality of sub-arrays are mirrored to each other in order to realize high directionality, small form factor, and miniaturized chip size for wideband operation. It has an array structure. The wideband patch array antenna device 100 of this embodiment has a 2x2 wideband patch array structure in which four patch antennas 112, 114, 1122, and 124 are arranged horizontally and vertically. Of course, the broadband patch array antenna device 100 of the present invention is not only a 2 × 2 structure, but also N × N (N is a positive integer of 2 or more), for example, in the form of a broadband patch array, such as 4 × 4, 8 × 8 It is obvious that it is also extensible.

To this end, the broadband patch array antenna device 100 of the present invention includes a substrate 102, a feed port 104, first and second subarrays 110 and 120, and a phase inverter 130. It includes. The broadband patch array antenna device 100 further includes a reflector 106.

Specifically, the substrate 102 may be formed of, for example, a dielectric substrate such as an RF-35 substrate manufactured by Taconic Corporation or a printed circuit board (PCB) such as glass epoxy (FR-4). The signal planes 108 forming the feed network by electrically connecting the 110 and 120 and the sub arrays 110 and 120 to each other are formed, and a ground plane (140 in FIG. 5) is formed on the bottom surface.

The feed port 104 is provided with, for example, an SMA connector, and is electrically connected to a signal plane 108 formed on an upper surface of the dielectric substrate 102 and a ground plane 140 formed on a lower surface thereof, thereby providing a terminal for broadband mobile communication. It forms a line connected to an electronic device (not shown), such as a transmitter or a receiver.

Each of the first and second sub arrays 110 and 120 is formed on the top surface of the substrate 102 in a 1 × 2 sub array. Each of the first and second sub arrays 110 and 120 has patch antennas 112, 114, or 122, 124 symmetrically arranged. The first and second sub arrays 110 and 120 are electrically connected by the signal plane 108 to form a feed network. These first and second sub-arrays 110 and 120 are disposed above and below the substrate 102 to be mirrored and symmetric with each other.

The phase inverter 130 is formed on a feed network between the first and second sub arrays 110 and 120. The phase inverter 130 is formed to shift the phase between the first and second sub arrays 110 and 120 by 180 °.

In addition, the reflector 106 is provided with, for example, a metal reflector, an FR4 substrate having an upper surface covered with a metal, and is provided below the substrate 102 at a predetermined interval. The reflector 106 reflects all fields emitted by the sub arrays 110, 120 formed on the substrate 102.

In the broadband patch array antenna device 100 of the present invention, the structure of the first and second sub arrays and the phase inverter is determined based on the principle illustrated in FIGS. 2 to 4.

That is, FIG. 2 is a view for explaining the electric field polarization direction for one sub-array shown in FIG. 1, FIG. 3 is a view showing a structure without a phase inverter in a 2x2 broadband patch array antenna device, and FIG. 4 is a diagram showing a structure with a phase inverter.

Referring first to FIG. 2, the radiated electric fields E ₁ , E ₂ by one 1 × 2 sub array are represented by solid arrows. The radiated field at each patch antenna may be divided into two vector components E _1x , E _1y , E _2x , and E _2y along the x and y axes. Here, the polarized polarization component is along the y axis, and assuming that the cross polarization component is along the x axis, the direction of the polarized polarization component at each patch antenna is clearly along the y axis because the polarized polarization component is stronger. The polarized polarization component in each patch antenna has the same direction, in which case the polarization of the radiation field is added.

Referring to FIG. 3, in a field polarization direction of a 2 × 2 broadband patch array antenna device without a phase inverter, a first sub array and a second sub array are formed in opposite directions. The radiated electric fields E ₁ , E ₂ , E ₃ and E ₄ of the patch antennas of each of the first and second sub arrays are represented by solid arrows.

That is, the radiated regions E ₁ , E ₂ , E ₃ , and E ₄ of each patch antenna have two vector components (E _1x , E _1y , E _2x , E _2y , (E) along the x and y axes. _3x , E _3y , E _4x , E _4y ) Again, given that the polarized polarization component is along the y axis and the cross polarization component is along the x axis, E ₁ and E ₂ are the opposite of E ₃ and E ₄ . Therefore, this arrangement does not work properly because all the radiated fields cancel each other.To solve this problem, the present invention requires a technique for changing the direction of the radiated electric field. 180 ° phase inverter 130 is applied to the feed network.

That is, referring to FIG. 4, here again the radiated electric fields E ₁ , E ₂ , E ₃ , E ₄ at the patch antennas of each of the first and second sub arrays are represented by solid arrows.

The radiated area (E ₁ , E ₂ , E ₃ , E ₄ ) of each patch antenna has two vector components (E _1x , E _1y , E _2x , E _2y , (E _3x , E _3y , E _4x , E _4y ) Assuming the polarized polarization component is along the y axis and the cross polarization component is along the x axis, the first and second sub-arrays are fed by a 180 ° phase inverter of the feed network. The phase between them is operated so that a 180 ° phase difference signal is output, so that the phase of the radiated electric field is changed by 180 °, and all the radiated electric fields E ₁ , E ₂ , E ₃ and E ₄ are in the same direction.

But the cross-polarization component, or y component, is in the opposite direction. E _1y , E _2y and E _3y , E _4y are also in opposite directions. These are not desired components because they are cross polarized components and are canceled by each other. Thus, only polarized polarization components along the x axis are present and added together. Therefore, the 2x2 wideband patch array antenna device can get the maximum gain by this structure. That is, the radiated electric field has the same phase in both array elements of the first and second sub arrays. Thus, the present invention must ensure that the polarization of the radiated electric field is in the same direction for all patch antenna elements in order to obtain maximum gain.

FIG. 5 is a rear view of the 2 × 2 broadband patch array antenna device shown in FIG. 1, and FIG. 6 is a view showing the ground plane structure of the 2 × 2 broadband patch array antenna device shown in FIG.

5 and 6, in the 2 × 2 broadband patch array antenna device 100 of the present invention, a ground plane 140 is formed on a lower surface of the substrate 102. The ground plane 140 of this embodiment has a partial plane of exponential design.

That is, the ground plane 140 includes first to third ground planes 142 to 146. Each of the first ground plane 142 and the second ground plane 144 has a width G _L of a predetermined size and is formed in a generally rectangular pattern. The first ground plane 142 and the second ground plane 144 are spaced apart from each other by a predetermined distance D _G.

The third ground plane 146 has a width M _L of a predetermined size and is disposed between the first and second ground planes 142 and 144. The third ground plane 146 is spaced apart from each of the first and second ground planes 142 and 144 by a predetermined interval G _g . One end of the third ground plane 146 is electrically connected to a central portion of the first and second ground planes 142 and 144, and the other end thereof is electrically connected to the feed port 104. The third ground plane 146 extends a predetermined distance M _W from one end to the other in one direction, _and is then tapered in the vertical direction to connect one end to each of the first and second ground planes 142 and 144. The third ground plane 146 has a tapering shape by exponential design. This tapered shape is intended to match the impedance of the feed network.

In this embodiment the ground plane 140 has dimensions D _G = 18 mm, G _g = 2 mm, G _L = 10 mm, M _L = 14 mm, M _W = 28.22 mm.

In addition, a signal surface 108 is formed on the upper surface of the substrate 102 opposite to the third ground surface 146. The signal plane 108 is electrically connected by a balanced T-junction in which the first and second subarrays 110 and 120 are symmetrically balanced with each other, and the second subarray 120 and the signal plane. The phase inverter 130 is disposed between the 108.

FIG. 7 is a diagram showing the structure of the phase inverter of the 2x2 broadband patch array antenna device shown in FIG. 1, and FIG. 8 is a waveform diagram showing the phase difference of the phase inverter shown in FIG.

7 and 8, the phase inverter 130 of this embodiment is formed using an inter-digitated structure and electronic vias.

That is, the phase inverter 130 is formed in a structure in which the signal plane 108 and the ground plane 140 are mutually coupled and electrically connected by the plurality of vias 150.

Specifically, to form the phase inverter 130, the signal plane 108 is separated into first and second signal planes 108a and 108b. The first and second signal surfaces 108a and 108b are formed of a plurality of protrusions and recesses to be fitted adjacent to each other. In this embodiment, the first signal surface 108a is formed generally similar to the 'ㅌ' shape, and the second signal surface 108b is formed substantially similar to the 'c' shape. The first and second signal surfaces 108a and 108b are inserted adjacent to each other at a predetermined interval I _S.

In addition, the ground plane 140 is divided into fourth and fifth ground planes 140a and 140b corresponding to the first and second signal planes 108a and 108b, respectively. The fourth and fifth ground planes 140a and 140b are spaced apart from each other by a predetermined interval I _g .

Accordingly, the first signal plane 108a and the fifth ground plane 140b are coupled to each other by a plurality of vias 150, and the second signal plane 108b and the fourth ground plane 140a are connected to a plurality of vias 150. Are mutually coupled by

In this embodiment the phase inverter 130 has dimensions I _W = 0.9 mm, I _S = 0.25 mm L _W = 3 mm, I _L = 2.5 mm, I _g = 0.25 mm. As shown in FIG. 8, the phase inverter 130 may obtain a 180 ° phase difference in an operating bandwidth.

And FIG. 9 is a side view of the 2x2 wideband patch array antenna device shown in FIG. 1, and FIG. 10 is an actual view of the 2x2 wideband patch array antenna device according to the present invention.

9 and 10, the 2 × 2 broadband patch array antenna device 100 of the present invention further includes a reflector 106.

The reflector 106 is fixedly spaced apart from the lower portion of the substrate 102 by a plurality of plastic screws 160. In this embodiment the reflector 106 is spaced about 10 mm apart from the bottom of the substrate 102.

This interval is determined by optimizing the distance because it affects the performance of the patch array arrangement of the 2 × 2 wideband patch array antenna device 100.

In this embodiment the reflector 106 is provided with a metal reflector made of FR4 material, the top surface of which is covered with metal to reflect all emitted fields on the patch array arrangement on the substrate.

In this embodiment, the plastic screw 160 has a diameter of 3 mm, and is joined to protrude about 5 mm in the upper direction from the upper surface of the substrate 102.

A fabrication of a 2x2 wideband patch array antenna device 100 according to the present invention is shown in Figures 10 (a) and (b).

As described above, the 2 × 2 wideband patch array antenna device 100 of the present invention designs a phase inverter using four patch antennas arranged in a 2 × 2 patch array in order to increase the gain or directivity of the antenna. Feeding problem due to polarity mismatch was solved. Accordingly, the 2 × 2 broadband patch array antenna device 100 of the present invention can obtain the best gain with a small form factor, and has been tested by applying to a UWB pulse generator of a radar system, as shown in Table 1 below. Compared with the broadband patch array antenna devices of other structures, improved results such as gain gain and miniaturization were obtained.

Here, Table 1 shows a comparison of the test results with the broadband patch array antenna devices of the structure different from the 2 × 2 broadband patch array antenna device 100 of the present invention.

Referring to Table 1, the 2 × 2 wideband patch array antenna device 100 of the present invention provides a higher peak gain than that of [3] to [9], rather than [2], [4] and [6]. More compact. In addition, the present invention is easier to manufacture because it is formed in a simple geometry than when the spiral EGB is used as in [1], as in the case of [3], there is an advantage that no external power divider is required for the feeding network.

Accordingly, the 2 × 2 broadband patch array antenna device 100 of the present invention can realize an impedance bandwidth of about 2.5 to 5.5 GHz and a peak gain of 13 dBi, which can be applied to a portable broadband wireless system.

The embodiments described in the present specification and the accompanying drawings merely illustrate some of the technical ideas included in the present invention. Therefore, since the embodiments disclosed herein are not intended to limit the technical spirit of the present invention but to explain, it is obvious that the scope of the technical spirit of the present invention is not limited by these embodiments. Modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical idea included in the specification and drawings of the present invention should be construed as being included in the scope of the present invention.

100: broadband patch array antenna device
102: substrate
104: feed port
106: reflector
108: signal surface
110, 120: sub array
130: phase inverter
140: ground plane
150: Via
160: plastic screw

Claims (14)

In a broadband patch array antenna device:
A substrate having a signal surface formed on an upper surface thereof and a ground plane formed on a lower surface thereof;
First and second sub-arrays formed on the substrate and electrically connected to each other by the signal plane and mirrored to each other;
A feed port electrically connected to the signal plane and the ground plane at one side of the substrate; And
And a phase inverter formed on the signal surface between any one of the first and second sub arrays and the feed port to shift a phase between the first and second sub arrays by 180 degrees.
And the phase inverter is coupled and electrically connected to the signal plane and the ground plane by a plurality of vias. The method according to claim 1,
Each of the first and second sub arrays is provided with 1 × 2 patch antennas symmetrically;
The broadband patch array antenna device is N × N (N is a positive integer of 2 or more) broadband patch array antenna device. The method according to claim 1,
The phase inverter;
First and second signal surfaces which are separated from each other by a predetermined distance, and are formed of a plurality of protrusions and recesses to be inserted adjacent to each other and are inserted adjacent to each other;
First and second ground planes in which the ground planes are separated from each other in correspondence with the first and second signal planes and spaced apart from each other by a predetermined distance; And
And a plurality of vias in which the first signal plane and the second ground plane are mutually coupled to each other, and the second signal plane and the first ground plane are mutually coupled to each other. The method according to claim 1,
The ground plane;
First and second ground planes having a width of a predetermined size on the lower surface of the substrate and spaced apart from each other to form a rectangular pattern; And
It has a width of a predetermined size, disposed between the first and the second ground plane, spaced apart from each of the first and the second ground plane by a predetermined distance, one end is the center of the first and second ground plane And a third ground plane electrically connected to the portion and the other end electrically connected to the feed port. The method according to claim 4,
The third ground plane;
It extends a predetermined interval in one direction from the other end, the extended portion is formed to be tapered in the up and down inward direction has a tapering shape by the exponential design so that one end is connected to each of the first and the second ground plane A broadband patch array antenna device. The method according to claim 5,
The signal plane is formed on an upper surface of the substrate opposite the third ground plane such that the first and second sub arrays are electrically connected by a balanced T-junction in which the first and second sub arrays are balanced up and down symmetrically with each other. Broadband patch array antenna device, characterized in that. The method according to claim 1,
The broadband patch array antenna device;
And a reflector fixedly installed to be spaced apart from the lower portion of the substrate by using a plurality of plastic screws.
And the plastic screw is coupled to protrude upward from the upper surface of the substrate. The method according to claim 7,
And the reflector is provided with a metal reflector, the upper surface of which is covered with metal and reflects all electromagnetic fields emitted on the first and second sub-arrays on the substrate. In a 2 × 2 wideband patch array antenna device:
A substrate having a signal surface formed on an upper surface thereof and a ground plane formed on a lower surface thereof;
A first sub array in which a 1 × 2 patch antenna is formed on the substrate so as to be symmetrical with each other and electrically connected to each other by the signal plane;
A second sub array in which a 1 × 2 patch antenna is formed on the substrate so as to be mutually symmetrical to each other, electrically connected to each other by the signal plane, and mutually mirrored and symmetric with the first sub array;
A feed port electrically connected to the signal plane and the ground plane at one side of the substrate;
A phase inverter formed on the signal surface between the second sub array and the feed port to shift a phase between the first and second sub arrays by 180 degrees; And
And a reflector fixedly spaced apart from the lower portion of the substrate to reflect all electromagnetic fields emitted on the first and second sub-arrays.
And wherein said phase inverter is coupled and electrically coupled to said signal plane and said ground plane by a plurality of vias. The method according to claim 9,
The ground plane;
First and second ground planes having a width of a predetermined size on the lower surface of the substrate and spaced apart from each other to form a rectangular pattern; And
It has a width of a predetermined size, disposed between the first and the second ground plane, spaced apart from each of the first and the second ground plane by a predetermined distance, one end is the center of the first and second ground plane Is electrically connected to a part, the other end is electrically connected to the feed port, and the other end extends at a predetermined interval in one direction from the other end, and the extended part is formed to be tapered in the up and down inward direction so that one end is connected to the first and the second ground. And a third ground plane having a tapering shape according to an exponential design so as to be connected to each of the planes. The method according to claim 10,
The signal plane is formed on an upper surface of the substrate opposite the third ground plane such that the first and second sub arrays are electrically connected by a balanced T-junction in which the first and second sub arrays are balanced up and down symmetrically with each other. 2 x 2 broadband patch array antenna device. The method according to claim 10 or 11,
The phase inverter;
First and second signal surfaces which are separated from each other by a predetermined distance, and are formed of a plurality of protrusions and recesses to be inserted adjacent to each other and are inserted adjacent to each other;
Fourth and fifth ground planes in which the ground planes are separated from each other in correspondence with the first and second signal planes and spaced apart from each other by a predetermined distance; And
And a plurality of vias in which the first signal plane and the fifth ground plane are coupled to each other, and the second signal plane and the fourth ground plane are coupled to each other. . The method according to claim 9,
And the reflector is provided with a metal reflector, the upper surface of which is covered with metal and reflects all electromagnetic fields emitted on the first and second sub-arrays on the substrate. The method according to claim 13,
The reflector is fixed to the lower portion of the substrate by using a plurality of plastic screws 2 × 2 broadband patch array antenna device, characterized in that fixed installation.

Images