CN215184530U

CN215184530U - Integrated waveguide dual-circularly-polarized antenna with enhanced bandwidth

Info

Publication number: CN215184530U
Application number: CN202121639983.5U
Authority: CN
Inventors: 杨明; 周金芝
Original assignee: Bozhou University
Current assignee: Bozhou University
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-12-14
Anticipated expiration: 2031-07-19

Abstract

The utility model relates to an integrated waveguide double circular polarized antenna with reinforcing nature bandwidth, including the medium base plate, the front printing of medium base plate has the integrated waveguide resonant cavity of eight mode substrates that two symmetries set up, the front of medium base plate still prints the parasitic paster of rectangle, the parasitic paster of rectangle is located in the middle of the cavity that two integrated waveguide resonant cavities of eight mode substrates constitute, the medium base plate adopts thickness 1.575 mm, dielectric constant 2.2 and tangent line loss 0.0009's rouges 5880 panel. An integrated waveguide double circular polarization antenna with enhanced bandwidth is provided for the first time, a rectangular parasitic patch is combined with two eight-mode substrate integrated waveguide resonant cavities which are symmetrically arranged to obtain the characteristics of circular polarization and broadband, when the antenna is used for the 3.24 GHz to 3.60 GHz, the reflection coefficients of two ports meet the requirements of less than or equal to minus 10 dB, the high isolation degree is higher than 11.6 dB, the maximum radiation gain of 5.74 dBic and the double circular polarization characteristic are achieved easily, and the antenna designed by the antenna is an ideal 5G selection.

Description

Integrated waveguide dual-circularly-polarized antenna with enhanced bandwidth

Technical Field

The utility model relates to an integrated waveguide double circular polarized antenna with reinforcing nature bandwidth belongs to wireless communication antenna technical field.

Background

In recent years, the modern wireless communication technology has been developed vigorously, with the accompanying increasingly complex and crowded electromagnetic environment, and in view of the practicality and economy of antennas, the wireless communication market has urgently demanded new antennas with miniaturization, high gain, multi-polarization and large bandwidth to mitigate the negative effects due to heavy structures, multi-path interference, polarization mismatch and noise, and SIW (substrate integrated waveguide) technology, which combines a printed circuit board and periodically arranged metallized through holes, is being gradually adopted to design antennas with low profile, low cost, high gain, dual frequency and circular polarization;

seideda ari first studied two single-feed HMSIW (half-mode substrate integrated waveguide) circularly polarized antennas in the prior art, and installed microstrip lines on different layers of a single substrate to obtain left-hand and right-hand circularly polarized characteristics, and also designed leaky-wave HMSIW antennas by using interdigital capacitors to obtain broadband and circularly polarized characteristics, however, the two antennas in the prior art have disadvantages of 3 dB Axial Ratio Bandwidth (ARBW) less than 100 MHz and relatively complicated structure, respectively;

in the prior art, two coupled miniaturized EMSIW radiating cavities are combined with a feed network to design a dual antenna system with enhanced bandwidth. With the benefit of the coupling between the main and parasitic resonators, a measurement bandwidth of 414 MHz, a maximum gain of 4.7 dBi and a stable radiation pattern are obtained in the proposed operation, the linearly polarized EMSIW antenna has the advantages of simple design, easy implementation and compactness, and has also been previously designed for wireless LAN applications, and on the basis of the prior art, a C-shaped slot and a complementary triangular split ring resonator (CSRR) slot are introduced on the EMSIW antenna to achieve dual-frequency characteristics, however, compared with the impedance bandwidth of the antenna in the prior art, it can be seen that the most excellent impedance bandwidth is only 2.42%. Meanwhile, in another prior art, a broadband left-side circularly polarized filter antenna fed by an EMSIW resonator is provided, and under the condition of single circular polarization, the measured working bandwidth is greater than 18.5%, with the continuous deepening of EMSIW research, EMSIW antennas with excellent characteristics are developed endlessly, but almost no research is carried out on broadband EMSIW antennas with double-induction circular polarization, and therefore an integrated waveguide double-circularly polarized antenna with enhanced bandwidth is provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model overcomes current defect, provides an integrated waveguide double circular polarized antenna with reinforcing nature bandwidth, can effectively solve the problem in the background art.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides an integrated waveguide dual circular polarized antenna with enhanced bandwidth, includes the dielectric substrate, the front of dielectric substrate is printed there are two eight mould substrate integrated waveguide resonant cavities that the symmetry set up, the front of dielectric substrate still prints rectangle parasitic patch, rectangle parasitic patch is located the middle of the cavity that two eight mould substrate integrated waveguide resonant cavities constitute, the dielectric substrate adopts the Rogers 5880 panel of thickness 1.575 mm, dielectric constant 2.2 and tangent loss 0.0009, the back of dielectric substrate is printed there is the metal ground plate, one side of metal ground plate back to the dielectric substrate is fixed mounting has two SMA coaxial probes, sets up the dielectric substrate like this and is used for obtaining wider bandwidth and higher radiation efficiency.

As a further improvement of the utility model, the integrated waveguide resonant cavity of eight mode substrates comprises the triangle-shaped metal level, periodic metallization through-hole has been seted up on the surface of triangle-shaped metal level.

As a further improvement of the utility model, two the end connection of the coaxial probe of SMA in the inside one end of metal ground plate has the coaxial feeder of SMA, two the coaxial feeder of SMA is by the supreme medium base plate excitation eight mode substrate integrated waveguide resonant cavities that passes of medium base plate downside.

As a further improvement of the present invention, the fixed surface of the dielectric substrate has a metal connecting post, which is located in the middle and is inserted into the metallized through hole.

The utility model discloses beneficial effect:

an integrated waveguide double circular polarization antenna with enhanced bandwidth is provided, a rectangular parasitic patch is combined with two eight-mode substrate integrated waveguide resonant cavities which are symmetrically arranged for the first time to obtain the characteristics of circular polarization and broadband, and the measurement result shows that when the antenna is used for measuring 3.24 GHz to 3.60 GHz, the reflection coefficients of two ports meet the requirements of less than or equal to-10 dB, the high isolation degree is higher than 11.6 dB, the maximum radiation gain of 5.74 dBic and the double circular polarization characteristic are easy to realize, and the antenna designed in the text is an ideal choice of 5G.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic diagram of the overall structure of an integrated waveguide dual circularly polarized antenna with enhanced bandwidth.

Fig. 2 is a schematic front view of an integrated waveguide dual circularly polarized antenna with enhanced bandwidth according to the present invention.

Fig. 3 is a comparison graph of the measured axial ratio, the fluctuation trend of gain and radiation efficiency of two ports of the integrated waveguide dual circularly polarized antenna with enhanced bandwidth and simulation results.

Fig. 4 is a schematic diagram of comparison between measured reflection coefficients and simulation results of two ports of an integrated waveguide dual circularly polarized antenna with enhanced bandwidth.

Reference numbers in the figures: 1. a dielectric substrate; 2. a rectangular parasitic patch; 3. an eight-mode substrate integrated waveguide resonant cavity; 4. metallizing the through-hole; 5. a metal connecting column; 6. a metal ground plate; 7. an SMA coaxial probe; 8. SMA coaxial feed lines.

Detailed Description

The present invention will be further described with reference to the following embodiments, wherein the drawings are for illustrative purposes only and are not intended to be limiting, and in order to better illustrate the embodiments of the present invention, some components of the drawings may be omitted, enlarged or reduced and do not represent the size of an actual product.

In order to make the technical means, creation characteristics, achievement purposes and efficacies of the utility model easy to understand, in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of description of the present invention and simplification of description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention, furthermore, the terms "first", "second", "third" are used for descriptive purposes only, but not as indicating or implying relative importance, the invention is further described below in connection with the detailed description.

Examples

As shown in fig. 1-2, an integrated waveguide dual-circularly polarized antenna with enhanced bandwidth includes a dielectric substrate 1, two eight-mode substrate integrated waveguide resonant cavities 3 symmetrically arranged are printed on the front surface of the dielectric substrate 1, a rectangular parasitic patch 2 is also printed on the front surface of the dielectric substrate 1, the rectangular parasitic patch 2 is located in the middle of a cavity formed by the two eight-mode substrate integrated waveguide resonant cavities 3, the dielectric substrate 1 is made of a rogers 5880 plate with a thickness of 1.575 mm, a dielectric constant of 2.2 and a tangential loss of 0.0009, a metal ground plate 6 is printed on the back surface of the dielectric substrate 1, and two SMA coaxial probes 7 are fixedly mounted on one side of the metal ground plate 6, which is opposite to the dielectric substrate 1; the eight-mode substrate integrated waveguide resonant cavity 3 is composed of a triangular metal layer, and periodic metalized through holes 4 are formed in the surface of the triangular metal layer; the end parts of one ends of the two SMA coaxial probes 7 in the metal grounding plate 6 are connected with SMA coaxial feeder lines 8, and the two SMA coaxial feeder lines 8 penetrate through the dielectric substrate 1 from the lower side of the dielectric substrate 1 to the upper side to excite the eight-mode substrate integrated waveguide resonant cavity 3; the surface of the medium substrate 1 is fixedly provided with a metal connecting column 5, the metal connecting column 5 in the middle is inserted into the metalized through hole 4, and the medium substrate has the advantages of simple structure and easiness in realization.

As can be seen from fig. 3, the fluctuation trend of the measured axial ratio, gain and radiation efficiency of the two ports follows the simulation results, and it is found that the ARBW is 4.5% at 3.48 GHz to 3.64 GHz, the maximum measured gain achieved at 3.45 GHz is 5.74 dBic, and the radiation efficiency is 88%.

As can be seen from FIG. 4, the measurement results show that the reflection coefficients of the two ports satisfy the requirement of ≦ -10 dB from 3.24 GHz to 3.60 GHz.

The embodiment can realize that: the rectangular parasitic patch 2 is combined with two eight-mode substrate integrated waveguide resonant cavities 3 which are symmetrically arranged to obtain the characteristics of circular polarization and broadband, and the measurement result shows that when the antenna is in the range from 3.24 GHz to 3.60 GHz, the reflection coefficients of two ports meet the requirements of less than or equal to minus 10 dB, the isolation is higher than 11.6 dB, the maximum radiation gain of 5.74 dBic and the characteristics of double circular polarization are high, and the antenna is easy to realize, and is an ideal choice of 5G.

The foregoing is an embodiment of the preferred embodiment of the present invention, showing and describing the basic principles and main features of the present invention and the advantages of the present invention, it should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and the foregoing embodiments and descriptions are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the present invention, which fall within the scope of the present invention as claimed, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated waveguide dual circularly polarized antenna having an enhanced bandwidth, comprising: including medium base plate (1), the front printing of medium base plate (1) has eight mould base plate integrated waveguide resonant cavities (3) that two symmetries set up, the front of medium base plate (1) still prints rectangle parasitic patch (2), rectangle parasitic patch (2) are located in the middle of the cavity that two eight mould base plate integrated waveguide resonant cavities (3) constitute, medium base plate (1) adopts thickness 1.575 mm, 2.2 and tangent loss 0.0009's rogers 5880 panel, the back printing of medium base plate (1) has metal ground plate (6), one side fixed mounting that backs on medium base plate (1) of metal ground plate (6) has two SMA coaxial probe (7).

2. An integrated waveguide dual circularly polarized antenna with enhanced bandwidth as claimed in claim 1, wherein: the eight-mode substrate integrated waveguide resonant cavity (3) is composed of a triangular metal layer, and periodic metalized through holes (4) are formed in the surface of the triangular metal layer.

3. An integrated waveguide dual circularly polarized antenna with enhanced bandwidth as claimed in claim 1, wherein: the end parts of one ends of the two SMA coaxial probes (7) in the metal grounding plate (6) are connected with SMA coaxial feeder lines (8), and the two SMA coaxial feeder lines (8) penetrate through the dielectric substrate (1) from the lower side of the dielectric substrate (1) to the upper part to excite the eight-mode substrate integrated waveguide resonant cavity (3).

4. An integrated waveguide dual circularly polarized antenna with enhanced bandwidth as claimed in claim 1, wherein: the surface of the medium substrate (1) is fixedly provided with a metal connecting column (5), and the metal connecting column (5) in the middle is inserted into the metalized through hole (4).