KR101952765B1 - Hybrid antenna based on substrate integrated waveguide beamforming array antenna for 5g coexisting with lte - Google Patents

Abstract

A hybrid antenna based on a substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention includes a broadband and low insertion loss substrate integrated waveguide (SIW) beamforming array antenna ; And a plurality of LTE MIMO antennas disposed at a predetermined distance from an upper end and a lower end of the substrate integrated waveguide (SIW) beamforming array antenna, wherein the plurality of LTE MIMO antennas are excellent in isolation characteristics, It can secure market competitiveness based on high yield process and share 5G communication mode and LTE communication mode to smart phone or small repeater.

Description

[0001] HYBRID ANTENNA BASED ON SUBSTRATE INTEGRATED WAVEGUIDE BEAMFORMING ARRAY ANTENNA FOR 5G COEXISTING WITH LTE [0002] BACKGROUND OF THE INVENTION [0003]

The present invention relates to a hybrid antenna based on broadband and low loss substrate integrated waveguide beamforming array antennas for 5G and LTE coexistence.

The size of wireless communication devices has been shrinking day by day with advances in technology. The devices must be connected to the hybrid network for heterogeneous services such as Bluetooth, Wi-Fi, Zig-bee, and 4G / 5G. Multi-mode, multi-band antennas are a fundamental requirement of current and future communication devices. The antenna performance may be significantly degraded due to the high mutual coupling caused by the closely spaced antenna elements in the MIMO antenna. Due to the shrinking of the latest wireless devices, antenna performance must be improved even if the antennas are close to each other.

Various multi-mode antenna modules for MIMO communication in different frequency bands have been proposed. One of the disadvantages of the small MIMO module is that there is a mutual coupling between the input port and the antenna element, and the performance of the antenna is lowered due to the decrease of the isolation degree. Recently, a technique of improving the performance of the MIMO antenna by reducing mutual coupling and increasing the isolation degree has been introduced .

If the adjacent antennas are implemented with a substrate integrated waveguide (SIW), the degree of isolation between the millimeter wave communication devices can be increased.

[1] Y. Ban, C. Li, C. Sim, G. Wu and K. Wong, "4G / 5G Multiple antennas for future multi-mode smartphone applications," IEEE Access, Vol. 4, pp. 2981-2988, 2016. [2] T. Ohishi, N. Oodachi, S. Sekine and H. Shoki, "A method to improve the correlation coefficient and the mutual coupling for diversity antenna," IEEE Antenna Propag. Soc. Int. Symp. Dig., Washington, DC. USA, Jul. 2005. [3] Y.-J. Cheng, Substrate Integrated Antennas and Arrays, CRC Press Taylor & Francis Group, 2016. [4] M. K. Khattak, S. Kahng, et al., "A low profile wideband and high gain beam-steering antenna for 5G mobile communication," IEEE APS 2017, San Diego, USA. [5] K. Jang, M. K. Khattak, et al., "Handheld beamforming antennas adoptable to 5G wireless connectivity," iWAT, Korea, 2015. [6] S. Yamamoto, S. Hirokawa and M. Ando, "A 26 GHz band witching beam slot array with a 4-way butler matrix installed in a single layer post-wall waveguide," IEICE Technical ED2001-148, MW 2002 -208.

A problem to be solved by the present invention is to provide a mobile communication system in which a 5G communication mode and an LTE communication mode coexist in a smart phone or a small repeater, with excellent isolation characteristics, large MIMO capacity, low cost and high- Integrated antenna waveguide array antenna for 5G and LTE coexistence, which can be used for a wide range of applications.

According to an embodiment of the present invention, there is provided a substrate integrated waveguide beamforming array antenna based hybrid antenna for 5G and LTE coexistence,

Wideband Low insertion loss SiW (Substrate Integrated Waveguide) beamforming array antenna for 5G; And

And a plurality of MIMO antennas for LTE services arranged at a predetermined distance from the upper and lower ends of the substrate integrated waveguide (SIW) beamforming array antenna.

Further, in the hybrid antenna based on the substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention, the substrate integrated waveguide (SIW) beamforming array antenna is a substrate integrated waveguide SIW: Substrate Integrated Waveguide) Butler matrix beam-forming array antenna.

In accordance with another aspect of the present invention, there is provided a hybrid antenna based on a substrate integrated waveguide beamforming array for 5G and LTE coexistence, the SIW Butler matrix beamforming array antenna including a SIW Butler matrix structure and a radiator,

The SIW Butler matrix structure and the radiator may be connected by a microstrip line having a tapered wide band transition structure and a constant line width.

In accordance with another aspect of the present invention, there is provided a hybrid antenna based on a substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE, wherein a radiator of the SIW Butler matrix beamforming antenna is spaced a predetermined distance from the microstrip line, And an impedance matching structure extending from the radiator in the direction of the SIW Butler matrix structure by a predetermined length and formed in parallel with the microstrip line and formed symmetrically with respect to the microstrip line.

Further, in the hybrid antenna based on the substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention, the SIW Butler matrix structure includes:

First and second hybrid couplers based on SIW;

A first SIW-based first 45 ° phase shifter coupled to the first hybrid coupler, a first SIW-based crossover coupler coupled to the first and second hybrid couplers, and a second SIW-based second crossover coupler coupled to the second hybrid coupler. 45 ° phase shifter; And

A SIW based third hybrid coupler coupled to the first 45 ° phase shifter and the first crossover coupler and a SIW based fourth hybrid coupler coupled to the first crossover coupler and the second 45 ° phase shifter can do.

Further, in the hybrid antenna based on the substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention, the SIW Butler matrix structure includes:

A first phase shifter for correction based on SIW connected to the third hybrid coupler;

A second SIW-based crossover coupler coupled to the third and fourth hybrid couplers; And

And a second phase shifter for correction based on SIW connected to the fourth hybrid coupler.

Further, in accordance with an embodiment of the present invention, there is provided a substrate integrated waveguide beamforming array antenna based hybrid antenna for coexistence of 5G and LTE, wherein the SIW-based first to fourth hybrid coupler coupling parts, 1 and the phase shifter of the second phase shifter and the first and second correction phase shifters and the via-holes of the coupling portion of the SIW-based first and second crossover couplers have a sharp angle In a curved surface shape.

According to one embodiment of the present invention, a substrate integrated waveguide beamforming array antenna-based hybrid antenna for coexistence of 5G and LTE has a structure in which a waveguide structure of a substrate integrated waveguide (SIW) Butler matrix beamforming array antenna is combined with an LTE MIMO antenna It is possible to secure market competitiveness based on the low-cost and high-yield process and to share 5G communication mode and LTE communication mode to smart phone or small-sized repeater. .

1 shows a microstrip line transmission line.
2 is a view showing S-parameter characteristics of a microstrip line transmission line;
3 shows a substrate integrated waveguide (SIW) transmission line;
4 is a diagram showing S parameter characteristics of a substrate integrated waveguide (SIW) transmission line;
5 is a view illustrating a structure of a hybrid antenna based on a substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention.
FIG. 6 illustrates a hybrid antenna based on a substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention, which is actually manufactured according to the antenna structure of FIG. 5;
FIG. 7 illustrates a structure of a substrate integrated waveguide (SIW) Butler matrix beam-forming array antenna included in a hybrid antenna based on a substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention. FIG.
8 is a view showing a tapered wide band transition structure, a microstrip line having a constant line width, and a radiator.
9 is a block diagram of a 4x4 Butler matrix.
10 is a diagram illustrating a structure of a SIW-based hybrid coupler included in a substrate integrated waveguide beamforming array antenna based hybrid antenna for 5G and LTE coexistence according to an embodiment of the present invention.
11 is a diagram showing S parameter (size) characteristics of the SIW-based hybrid coupler shown in FIG. 10;
12 is a diagram showing S parameter (phase) characteristics of the SIW-based hybrid coupler shown in FIG. 10; FIG.
13 is a view showing an E-field of the SIW-based hybrid coupler shown in FIG. 10;
14 is a diagram illustrating a structure of a SIW-based crossover coupler included in a substrate integrated waveguide beamforming array antenna-based hybrid antenna for 5G and LTE coexistence according to an embodiment of the present invention.
15 shows S parameter (size) characteristics of the SIW-based crossover coupler shown in Fig. 14; Fig.
16 illustrates S-parameter (phase) characteristics of the SIW-based crossover coupler shown in FIG. 10;
17 illustrates an E-field of a SIW-based crossover coupler shown in FIG. 10; FIG.
18 is a diagram illustrating a structure of a SIW-based phase shifter included in a substrate integrated waveguide beamforming array antenna-based hybrid antenna for 5G and LTE coexistence according to an embodiment of the present invention.
FIG. 19 shows S parameter (size) characteristics of the SIW-based phase shifter shown in FIG. 18; FIG.
20 shows S parameter (phase) characteristics of the SIW-based phase shifter shown in FIG. 18; FIG.
FIG. 21 is a view showing the return loss of the array antenna shown in FIG. 7; FIG.
FIG. 22 is a view showing a two-dimensional far-field radiation pattern of the array antenna shown in FIG. 7; FIG.
23 shows a chip antenna;
24A and 24B are a top view and a bottom view of a chip antenna, respectively.
Fig. 25 is a view showing a simulated and measured far-field radiation pattern of the chip antenna shown in Fig. 23. Fig.
Fig. 26 is a diagram showing simulation and actual reflection loss of the chip antenna shown in Fig. 23. Fig.
FIGS. 27 to 29 are simulation results and actual measurement results of hybrid antennas based on a 5G and 5E substrate integrated waveguide Butler matrix beam-forming array antenna shown in FIG. 5 and FIG. 6. FIG. Fig. 28 shows measured return loss of chip antenna ports, Fig. 29 shows simulation isolation and measured isolation based on port 1, Fig.
FIGS. 30 and 31 are diagrams illustrating measured results of a substrate integrated waveguide beamforming array antenna based hybrid antenna for 5G and LTE coexistence according to an embodiment of the present invention. FIG.
32 illustrates a structure of another exemplary SIW Butler matrix structure used in a hybrid antenna based on a substrate integrated waveguide beamforming array antenna for 5G and LTE coexistence according to an embodiment of the present invention;
Fig. 33 is a view showing an isolation diagram of each port of the antenna when the SIW Butler matrix structure shown in Fig. 32 is used; Fig.
34 is a diagram showing the structure of a substrate integrated waveguide Butler matrix beam-forming array antenna using the SIW Butler matrix structure shown in FIG. 32;
FIG. 35 illustrates a substrate integrated waveguide (SIW) Butler matrix beamforming array antenna actually fabricated according to the antenna structure of FIG. 34; FIG.
36 is a diagram showing simulation reflection loss and actual reflection loss of the substrate integrated waveguide (SIW) Butler matrix beam-forming array antenna shown in Figs. 34 and 35. Fig.
FIG. 37 is a view showing a simulated radiation pattern and an actual radiation pattern for each port of the substrate integrated waveguide (SIW) Butler matrix beam-forming array antenna shown in FIGS. 34 and 35; FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention Should be construed in accordance with the principles and the meanings and concepts consistent with the technical idea of the present invention.

It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings.

Also, the terms "first", "second", "one side", "other side", etc. are used to distinguish one element from another, It is not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, a detailed description of known arts which may unnecessarily obscure the gist of the present invention will be omitted.

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

One embodiment of the present invention proposes a hybrid multi-mode antenna module for future wireless communication devices and in particular smart phones. The antenna module according to an embodiment of the present invention includes four MIMO chip antennas having an operating frequency of 2.4 GHz in applications such as Wi-Fi and Bluetooth, and 4 × 4 antennas operating in a wide band of 27 GHz to 29 GHz in 5 G applications And an integrated waveguide (SIW) Butler Matrix beamforming array antenna (BFN-A). The performance of the proposed 8-port module of the present invention is also observed. Simulation results and measurement results of gain and farfield radiation patterns as well as return loss and isolation for all eight ports are discussed.

Low profile and high gain 4 × 4 Butler matrix (BM) based beamforming network array antenna (BFN-A) with 28 GHz integrated with 4 chip antennas operating at 2.4 GHz Modules are presented in the present invention.

The antenna module according to an embodiment of the present invention has a total of eight ports. Four ports are connected to BFN-A, while four ports are connected to four separate chip antennas located at the top and bottom of BFN-A. Simulated return loss and measured return loss at all ports as well as isolation levels between adjacent ports are examined and presented. The simulated three-dimensional far-field radiation pattern and the gain of the antenna module at 2.4 GHz and 28 GHz are discussed.

2, the transmission line of the substrate integrated waveguide (SIW) substrate shown in FIG. 3 is formed to have a narrow band width as shown in FIG. 4, while the bandwidth of the microstrip transmission line shown in FIG. Bandwidth is quite wide.

As shown in FIG. 3, the substrate integrated waveguide (SIW) is a waveguide approximated by replacing both sidewalls of a metal spherical waveguide with periodic via holes. Generally, a waveguide has a characteristic of having a high-pass response characteristic and widening the bandwidth beyond the cutoff frequency. Therefore, the transmission line based on the substrate integrated waveguide (SIW) has a wide band characteristic as shown in FIG.

The hybrid antenna based on the substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE according to an embodiment of the present invention shown in FIG. 5 includes a broadband low insertion loss substrate integrated waveguide (SIW) ) And a plurality of four LTE MIMO antennas (not shown) spaced a predetermined distance apart from the upper and lower ends of the Butler matrix beam-forming array antenna 500 and the substrate integrated waveguide (SIW) (502).

FIG. 6 is a diagram illustrating a hybrid antenna based on a substrate integrated waveguide beamforming array antenna for 5G and LTE coexistence according to an embodiment of the present invention, which is actually manufactured according to the antenna structure of FIG.

7, the SIW Butler matrix beamforming array antenna 500 includes a SIW Butler matrix structure 700 and a radiator 702, and the SIW Butler matrix structure 700 and the radiator 702 Tapered broadband transition structure 704 and a microstrip line 706 having a constant line width.

The SIW Butler matrix beamforming array antenna 500 is a 4x4 SIW Butler matrix beamforming array antenna with a broadband operating bandwidth of 26.5-29 GHz and was fabricated on an RT5880 substrate with a dielectric constant of 2.2. The measured return loss of the SIW Butler matrix beam-forming array antenna 500 is shown in FIG. 21 and the three-dimensional far field radiation pattern is shown in FIG.

Beam steering from port 2 to port 5 from -38 DEG to + 38 DEG is achieved by the SIW Butler matrix beamforming array antenna 500 to cover the entire coverage of about 75 DEG.

8, the radiator 702 of the SIW Butler matrix beamforming antenna 500 is spaced a predetermined distance from the microstrip line 706 and is spaced apart from the radiator 702 by the SIW Butler matrix structure 700 formed in parallel with the microstrip line 706 and formed symmetrically with respect to the microstrip line 706. The impedance matching structures 701,

The impedance matching structures 701 and 703 precisely match the impedance between the SIW Butler matrix structure 700 and the radiator 702 to prevent reflection loss so that maximum power is transmitted.

Referring again to FIG. 7, the SIW Butler matrix structure 700 is formed on the substrate integrated waveguide (SIW) based on the equivalent circuit of the Butler matrix shown in FIG. 9, and includes first and second SIW- Coupler 708 and 710, a SIW-based first 45 ° phase shifter 712 connected to the first hybrid coupler 708, a SIW-based phase shifter 712 connected to the first and second hybrid couplers 708 and 710, 1 crossover coupler 714 and a SIW based second 45 ° phase shifter 716 coupled to the second hybrid coupler 710 and a second 45 占 phase shifter 716 based on the first 45 占 phase shifter 712, A SIW based third hybrid coupler 718 coupled to an overcoupler 714 and a SIW based fourth hybrid coupler 714 connected to the first crossover coupler 714 and the second 45 ° phase shifter 716 720).

The first through fourth hybrid couplers 708, 710, 718 and 720 are configured based on a substrate integrated waveguide (SIW) as shown in FIG. 10 and have the S parameter (size) characteristic of FIG. 11, S parameter (phase) characteristic. 13, the first through fourth hybrid couplers 708, 710, 718 and 720 generally transmit signals inputted to Port 1 through Port 2 and Port 3 ), And the phase difference between signals of Port 2 (Port 2) and Port 3 (Port 3) is 90 degrees.

10, the via holes 1002 of the coupling portion 1000 of the SIW-based first through fourth hybrid couplers 708, 710, 718, So as not to have a sharp angle in order to have broadband characteristics as shown in FIG.

The first crossover coupler 714 is based on a substrate integrated waveguide (SIW) as shown in Fig. 14, has the S parameter (size) characteristic of Fig. 15, and has the S parameter (phase) characteristic of Fig. . As shown in FIG. 17, the crossover coupler 714 is formed such that a signal input to Port 1 is generally passed through Port 3. Referring to the magnitude graph of FIG. 15 and FIG. 17, it can be seen that a signal is output only at port 3 (Port 3).

The crossover coupler 714 is formed so that a signal input to the port 4 is passed through the port 2.

14, the via-holes 1402 of the coupling portion 1400 of the SIW-based crossover coupler 714 are formed such that the characteristic of the processed signal has a broadband characteristic as shown in FIG. 15 And are arranged in a curved shape so as not to have sharp angles.

The first and second phase shifters 712 and 716 are configured based on a substrate integrated waveguide (SIW) as shown in FIG. 18 and have S parameter (size) characteristics of FIG. 19, Phase) characteristics. The first and second phase shifters 712 and 716 are generally configured such that a signal input to port 5 is output to port 6 or a signal input to port 7 is output to port 8 Port 8, and has only a phase delay characteristic. A phase shift of 45 degrees at the center frequency of 28 GHz can be confirmed.

18, the via holes 1802 of the phase shifter 1800 of the SIW-based first and second phase shifters 712 and 716 have the characteristics of the processed signal as shown in FIG. 19 Are arranged in a curved shape so as not to have a sharp angle in order to have broadband characteristics as shown in Fig.

The SIW Butler matrix beam-forming array antenna 500 shown in FIG. 7 has a return loss and a two-dimensional far-field radiation pattern as shown in FIGS. 21 and 22. FIG.

As shown in FIG. 21, it can be seen that the covering band width is considerably wide to about 3 GHz, covering 3 bands of 5G, and it is also confirmed that the radiation pattern is very excellent.

Meanwhile, a plurality of LTE MIMO antennas 502 of a hybrid antenna based on a substrate integrated waveguide beamforming array for coexistence of 5G and LTE according to an embodiment of the present invention shown in FIG. 23, 24A, and 24B, and has the radiation pattern of FIG. 25 and the S parameter (size) characteristic of FIG.

A hybrid antenna based on a substrate integrated waveguide beamforming array antenna for 5G and LTE coexistence according to an embodiment of the present invention, operating in two different communication modes of 5G and LTE shown in Figs. 5 and 6, The results are shown in Fig. 29.

27 to 29, port 5 at port 2 is connected to a broadband substrate integrated waveguide (SIW) Butler matrix beamforming array antenna 500 for beam steering at 28 GHz (5 G) 1. 6, 7 and 8 are connected to the LTE MIMO antenna 502 to operate at 2.4 GHz.

The simulation results and measured results in Figures 27 to 29 show good return loss and high isolation between the four LTE MIMO antenna ports. This result shows that the performance of the LTE MIMO antenna 502 is not influenced by the presence of the SIW structure with respect to the millimeter wave frequency. Therefore, the SIW structure Substrate Integrated Waveguide (SIW) Butler matrix beamforming array antenna 500 Lt; RTI ID = 0.0 > LTE < / RTI > MIMO antennas 502.

FIGS. 30 and 31 illustrate a measured far field pattern of an antenna according to an embodiment of the present invention. The performance of the antenna has a peak gain of about 8 dBi and is consistent with simulation results at 28 GHz. At 2.4 GHz The E-field and H-field radiation patterns decrease the gain of about 1 dBi near the SIW metal structure, but this is not a problem. Increasing the gain is also not tricky.

32 shows another exemplary SIW Butler matrix with the first and second correction phase shifters 3202 and 3206 and the second crossover coupler 3204 added to the SIW Butler matrix structure 700 shown in FIG. 0.0 > 3200 < / RTI >

The SIW Butler matrix structure 3200 shown in Fig. 32 includes a SIW-based first correction phase shifter 3202 connected to a third hybrid coupler 718, a third phase shifter 3202 connected to the third and fourth hybrid couplers 718 and 720 A second SIW based crossover coupler 3204 and a SIW based second phase shifter 3206 connected to the fourth hybrid coupler 720. [

In the absence of the first and second correction phase shifters 3202 and 3206 and the second crossover coupler 3204, for example, when the phase difference of the signals at ports 5, 6, 7 and 8 is 45 degrees , And the phase of each signal at ports 5, 6, 7, and 8 is 0 degrees, 90 degrees, 45 degrees, 135 degrees. The phases of port 6 and port 7 are reversed.

Therefore, the crossover coupler 3204 is used to switch the phases of the signals at the ports 6 and 7, and finally the phases of the signals at the ports 5, 6, 7 and 8 are 0 degrees, 45 degrees, 90 degrees, 135 degrees.

The first and second correcting phase shifters 3202 and 3206 are also used to compensate for the phase delay at ports 5 and 8 due to the phase delay additionally occurring at ports 6 and 7 due to the addition of the second crossover coupler 3204. [ This is for correcting the phase of the signal,

FIG. 33 shows an isolation diagram for each port of the SIW Butler matrix structure 3200 shown in FIG.

Fig. 34 shows the structure of a substrate integrated waveguide (SIW) Butler matrix beam-forming array antenna 3400 using the SIW Butler matrix structure 3200 shown in Fig. 32, and Fig. 35 shows the structure of the SIW (SIW: Substrate Integrated Waveguide) Butler matrix beam-forming array antenna.

36 shows simulation and actual reflection losses of the substrate integrated waveguide (SIW) Butler matrix beam-forming array antenna shown in Figs. 34 and 35, and Fig. 37 shows radiation patterns for each port .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be modified or improved.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

300: via hole
Integrated Integrated Waveguide (SIW) for 500: 5G Butler Matrix Beam Forming Array Antenna
502: LTE MIMO antenna 700: SIW Butler matrix structure
701, 703: Impedance matching structure
702: emitter 704: tapered broadband transition structure
706: Microstrip line 708, 710, 718, 720: Hybrid coupler
712. 716: Phase shifter 714: Crossover coupler
1000, 1400: coupling portion 1002, 1402, 1802: via hole
1800: Phase shifter 3200: SIW Butler matrix structure
3202, 3204: phase shifter for correction
3206: Crossover coupler
3400: Integrated Integrated Waveguide (SIW) Butler Matrix Beam Forming Array Antenna

Claims (7)

Wideband Low insertion loss SiW (Substrate Integrated Waveguide) beamforming array antenna for 5G; And
And a plurality of LTE MIMO antennas disposed at a predetermined distance from the upper and lower ends of the substrate integrated waveguide (SIW) beamforming array antenna,
The substrate integrated waveguide (SIW) beamforming array antenna includes a substrate integrated waveguide (SIW) Butler matrix beamforming array antenna,
Wherein the SIW Butler matrix beam-forming array antenna comprises a SIW Butler matrix structure and a radiator,
The SIW Butler matrix structure and the radiator are connected by a microstrip line having a tapered wide band transition structure and a constant line width,
The radiator of the SIW Butler matrix beamforming antenna is spaced a predetermined distance from the microstrip line and extends from the radiator in the direction of the SIW Butler matrix structure by a predetermined length and is formed in parallel with the microstrip line, Integrated waveguide beamforming array antenna based hybrid antenna for 5G and LTE coexistence, including an impedance matching structure formed in a symmetric shape. delete delete delete Wideband Low insertion loss SiW (Substrate Integrated Waveguide) beamforming array antenna for 5G; And
And a plurality of LTE MIMO antennas disposed at a predetermined distance from the upper and lower ends of the substrate integrated waveguide (SIW) beamforming array antenna,
The substrate integrated waveguide (SIW) beamforming array antenna includes a substrate integrated waveguide (SIW) Butler matrix beamforming array antenna,
Wherein the SIW Butler matrix beam-forming array antenna comprises a SIW Butler matrix structure and a radiator,
The SIW Butler matrix structure and the radiator are connected by a microstrip line having a tapered wide band transition structure and a constant line width,
The SIW Butler matrix structure includes:
First and second hybrid couplers based on SIW;
A first SIW-based first 45 ° phase shifter coupled to the first hybrid coupler, a first SIW-based crossover coupler coupled to the first and second hybrid couplers, and a second SIW-based second crossover coupler coupled to the second hybrid coupler. 45 ° phase shifter; And
A SIW based third hybrid coupler coupled to the first 45 ° phase shifter and the first crossover coupler and a SIW based fourth hybrid coupler coupled to the first crossover coupler and the second 45 ° phase shifter A Hybrid Antenna Based on a PCB Integrated Waveguide Beamforming Array for 5G and LTE Coexistence. The method of claim 5,
The SIW Butler matrix structure includes:
A first phase shifter for correction based on SIW connected to the third hybrid coupler;
A second SIW-based crossover coupler coupled to the third and fourth hybrid couplers; And
Further comprising a second phase shifting phase shifter based on a SIW coupled to the fourth hybrid coupler. The substrate integrated waveguide beamforming array antenna based hybrid antenna for 5G and LTE coexistence. The method of claim 6,
The SIW-based first to fourth hybrid couplers, the SIW-based first and second phase shifters, the first and second phase shifters for correction, and the SIW-based first and second SIW- A hybrid antenna based on a substrate integrated waveguide beamforming array antenna for coexistence of 5G and LTE, wherein the via - holes of the coupling part of the crossover coupler are arranged in a curved shape so as not to have a sharp angle in order to have broadband characteristics.

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