B1B3 wave band double-frequency common-caliber circularly polarized antenna array and communication equipment

Abstract

The invention discloses a B1B3 wave band double-frequency common-caliber circularly polarized antenna array and communication equipment, and belongs to the field of communication antennas. The antenna array comprises a metal floor, a fourth dielectric substrate, a plurality of B1-band magnetic resonance near-field parasitic circularly polarized antennas and a B3-band magnetic resonance near-field parasitic circularly polarized antenna arranged at the center of the fourth dielectric substrate. The plurality of B1-band magnetic resonance near-field parasitic circularly polarized antennas are arranged around the B3-band magnetic resonance near-field parasitic circularly polarized antenna in a central symmetry manner; the B1-band magnetic resonance near-field parasitic circularly polarized antenna comprises dielectric substrates I and resonant rings II which are arranged in pairs in a crossed manner, and L-shaped radiation metal strips arranged on the other end surfaces of the dielectric substrates I; the B3-band magnetic resonance near-field parasitic circularly polarized antenna arrangement comprises a seventh dielectric substrate, an eighth resonance ring and a rectangular radiation metal strip arranged on the other end face of the seventh dielectric substrate, wherein the seventh dielectric substrate and the eighth resonance ring are arranged in a paired and crossed mode.

Description

Technical Field

[0001] The present invention relates to the field of communication antennas, and in particular to a B1\B3 band dual-frequency co-aperture circularly polarized antenna array and communication equipment. Background Art

[0002] In the face of miniaturized, multi-task, and multi-functional wireless communication scenarios, co-aperture antenna arrays have attracted much attention due to their unique advantages of multi-frequency operation, small size, and high array utilization. Since antennas of different frequency bands and different standards need to be closely installed on the same surface, the electromagnetic interference between frequency bands is serious, and loading additional decoupling structures will face the problems of large size, increased profile height, and relatively complex system structure. Therefore, using the inherent self-decoupling characteristics of the antenna to achieve the co-aperture antenna's heterogeneous coupling suppression effect has become a research hotspot in the field of antennas for space-constrained mobile terminal platforms. In addition, co-aperture antennas also need to select appropriate antenna types, such as: patch antennas and slot antennas, slot antennas and slot antennas, dipole antennas and slot antennas, etc. The above methods are certainly effective in achieving co-aperture antenna performance, but they will increase the complexity and design cost of co-aperture antennas.

[0003] Therefore, it is of great value to invent a compact dual-frequency co-aperture circularly polarized antenna array with simple structure and high performance. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a B1\B3 band dual-frequency co-aperture circularly polarized antenna array and communication equipment.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The first aspect of the present invention relates to a co-aperture circularly polarized antenna array, comprising: a metal floor, a dielectric substrate four arranged on the upper end surface of the metal floor, a plurality of B1 band magnetic resonance near-field parasitic circularly polarized antennas, and a B3 band magnetic resonance near-field parasitic circularly polarized antenna arranged at the center of the dielectric substrate four;

[0007] A plurality of B1 band magnetic resonance near-field parasitic circular polarization antennas are centrally symmetrically arranged around a B3 band magnetic resonance near-field parasitic circular polarization antenna;

[0008] The B1 band magnetic resonance near-field parasitic circular polarization antenna comprises: dielectric substrates 1 arranged in pairs and crossed, resonant rings 2 arranged at the edge of one end surface of the dielectric substrate 1, and L-shaped radiation metal strips arranged at the other end surface of the dielectric substrate 1;

[0009] The B3 band magnetic resonant near-field parasitic circularly polarized antenna arrangement includes: dielectric substrates seven arranged in pairs and crossed, a resonant ring eight arranged on the edge of one end surface of the dielectric substrate seven, and a rectangular radiating metal strip arranged on the other end surface of the dielectric substrate seven.

[0010] Optionally, the pair of cross-arranged dielectric substrates one are perpendicular to each other, and the pair of cross-arranged dielectric substrates seven are perpendicular to each other; the angle formed by the plane where the dielectric substrate seven is located and the plane where any of the dielectric substrates one is located is 45 degrees; two rectangular radiating metal strips are arranged on the B3 band magnetic resonant near-field parasitic circularly polarized antenna, and the two rectangular radiating metal strips have different heights.

[0011] Optionally, the metal floor, the L-shaped radiating metal strip, the second resonant ring, the eighth resonant ring and the rectangular radiating metal strip are made of copper;

[0012] The material of the dielectric substrate 1, the dielectric substrate 4 and the dielectric substrate 7 is FR4.

[0013] Optionally, the L-shaped radiating metal strip and / or the rectangular radiating metal strip is connected to the inner conductor of the coaxial device through a trapezoidal metal strip.

[0014] Optionally, the resonant ring 2 and / or the resonant ring 8 has a disconnected opening on an edge close to the dielectric substrate 4.

[0015] Optionally, the planes where the L-shaped radiation metal strip and the rectangular radiation metal strip are located are both perpendicular to the plane where the dielectric substrate 4 is located.

[0016] Optionally, both the resonant ring 2 and the resonant ring 8 are provided with notches. In the same B1 band magnetic resonance near-field parasitic circular polarization antenna, the resonant ring 2 on the dielectric substrate 1 passes through the notch of the resonant ring 2 of the other dielectric substrate 1 and extends to the other side of the other dielectric substrate 1; in the same B3 band magnetic resonance near-field parasitic circular polarization antenna, the resonant ring 8 on the dielectric substrate 7 passes through the notch of the resonant ring 8 of the other dielectric substrate 7 and extends to the other side of the other dielectric substrate 7.

[0017] Optionally, four B1 band magnetic resonance near-field parasitic circularly polarized antennas are provided and distributed at four corners of a rectangular dielectric substrate.

[0018] Optionally, the spacing between adjacent B1 band magnetic resonance near-field parasitic circularly polarized antennas is less than half of their wavelength.

[0019] A second aspect of the present invention relates to a communication device, comprising the above-mentioned co-aperture circularly polarized antenna array.

[0020] The two types of antennas share a coaxial device of the same specification, wherein the inner conductor of the coaxial device is connected to the L-shaped radiating metal strip / or the rectangular radiating metal strip through the trapezoidal metal strip, and the outer conductor is connected to the metal floor;

[0021] The trapezoidal metal strip is arranged in both the B1 band magnetic resonance near-field parasitic circular polarization antenna unit and the B3 band magnetic resonance near-field parasitic circular polarization antenna unit, and is connected to the L-shaped radiating metal strip in the B1 band magnetic resonance near-field parasitic circular polarization antenna unit, and is connected to the rectangular radiating metal strip in the B3 band magnetic resonance near-field parasitic circular polarization antenna unit.

[0022] Beneficial effects of the present invention:

[0023] 1. The present invention utilizes L-shaped radiating metal strips and rectangular radiating metal strip feeding methods to introduce corresponding radiation zero points in the working frequency bands of B1\B3 band antennas respectively, without introducing additional coupling suppression structures, and can achieve high isolation (>20dB) and independent operation of high and low frequency antennas.

[0024] 2. The magnetic resonant near-field parasitic circularly polarized antenna unit of the present invention is small in size and low in profile, and is placed vertically. The high and low frequency antenna units efficiently utilize the cross-sectional dimensions, and there is no shielding or coupling between the units. The low frequency unit has little shielding effect on the high frequency antenna radiation pattern, and the array as a whole is easy to conform and have a low RCS design. The B1 band antenna array spacing is less than 0.28 B1 band wavelength, and the overall size is greatly reduced, meeting the conditions for large-angle scanning grating lobes of the array antenna, which is convenient for the design and application of subsequent phased array systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is an overall schematic diagram of the dual-frequency co-aperture circularly polarized antenna of the present invention;

[0027] Figure 2 A top view of the magnetic resonance near-field parasitic circularly polarized antenna unit of the present invention;

[0028] Figure 3 It is a structural diagram of the B3 band magnetic resonance near-field parasitic circularly polarized antenna unit of the present invention;

[0029] Figure 4 It is a structural diagram of the B1 band magnetic resonance near-field parasitic circularly polarized antenna unit of the present invention;

[0030] Figure 5 A top view of the dual-frequency co-aperture circularly polarized antenna of the present invention;

[0031] Figure 6The impedance and gain curves of the B1 band magnetic resonance near-field parasitic circularly polarized antenna unit of the present invention;

[0032] Figure 7 The impedance and gain curves of the B3 band magnetic resonance near-field parasitic circularly polarized antenna unit of the present invention;

[0033] Figure 8 is the impedance curve of the common aperture array of the present invention;

[0034] Fig. 9 is the isolation coefficient between the B1 band magnetic resonance near-field parasitic circularly polarized antenna units in the co-aperture array of the present invention;

[0035] Fig.10 It is the isolation coefficient between the B3 band magnetic resonance near-field parasitic circular polarization antenna unit and the B1 band magnetic resonance near-field parasitic circular polarization antenna unit of the co-aperture array of the present invention.

[0036] The corresponding numbers of the components in the figure are as follows: 1—dielectric substrate one, 2—resonance ring two, 3—metal floor, 4—dielectric substrate four, 5—trapezoidal metal strip, 6—coaxial device, 7—dielectric substrate seven, 8—resonance ring eight, 9—L-shaped radiation metal strip, 10—rectangular radiation metal strip. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1 As shown, in some embodiments of the present invention, a low-profile, compact and miniaturized B1\B3 band dual-frequency co-aperture circularly polarized antenna array is disclosed, and the antenna array includes a metal floor three 3, a B1 band magnetic resonant near-field parasitic circularly polarized antenna and a B3 band magnetic resonant near-field parasitic circularly polarized antenna.

[0039] The B1 band magnetic resonant near-field parasitic circularly polarized antenna is arranged in a 2×2 array on a dielectric substrate four 4, including a dielectric substrate four 4 arranged on a metal floor three 3, a dielectric substrate one 1 arranged on the dielectric substrate four 4, an L-shaped radiating metal strip nine 9 arranged on an end face of the dielectric substrate one 1, and a coaxial device six 6.

[0040] The B3 band magnetic resonance near-field parasitic circular polarization antenna is located between the B1 band magnetic resonance near-field parasitic circular polarization antennas and is arranged at the center of the dielectric substrate four 4, including a dielectric substrate four 4 arranged on the metal floor three 3, a dielectric substrate seven 7 arranged on the dielectric substrate four 4, a resonant ring eight 8 arranged on the dielectric substrate seven 7, a rectangular radiating metal strip ten 10 and a coaxial device six 6.

[0041] In some embodiments of the present invention, the dielectric substrate 1 and the dielectric substrate 7 are in pairs and arranged in an X-shaped cross pattern, and the two dielectric substrates arranged in the X-shaped cross pattern are perpendicular to each other to achieve circular polarization.

[0042] The B1 band magnetic resonance near-field parasitic circular polarization antenna unit and the B3 band magnetic resonance near-field parasitic circular polarization antenna unit share a coaxial device of the same specification.

[0043] A trapezoidal metal strip five 5 is provided in both the B1 band magnetic resonance near-field parasitic circular polarization antenna unit and the B3 band magnetic resonance near-field parasitic circular polarization antenna unit, and is connected to an L-shaped radiating metal strip nine 9 in the B1 band magnetic resonance near-field parasitic circular polarization antenna unit, and is connected to a rectangular radiating metal strip ten 10 in the B3 band magnetic resonance near-field parasitic circular polarization antenna unit.

[0044] The coaxial device six 6, its inner conductor is connected to the L-shaped radiation metal strip nine 9 and the rectangular radiation metal strip ten 10 through the trapezoidal metal strip five 5, and its outer conductor is connected to the metal floor three 3.

[0045] The plane where the L-shaped radiation metal strip nine 9 and the rectangular radiation metal strip ten 10 are located are perpendicular to the plane where the dielectric substrate four 4 is located.

[0046] In some more specific embodiments of the present invention, the specific size design of the B1\B3 band dual-frequency co-aperture circularly polarized antenna array in the above embodiment is provided, such as Figure 3 As shown, the height of the dielectric substrate 7 is l 1 =8.5mm, width is w 1 =42mm; the height of the resonant ring 8 is l 4 =7.75mm, width is w 1 =42mm, the length of the opening is l 5 =0.54mm, width is w 1 =42mm; in order to achieve circular polarization and produce a phase difference of 90°, metal strips of different lengths are provided, wherein the shorter metal strips are provided on the dielectric substrate 7 along the x-axis and symmetrically arranged about the y-axis, and the shorter metal strip length l 2 =7.2mm, the longer metal strip is arranged on the dielectric substrate 77 along the y-axis and symmetrically about the x-axis, and the shorter metal strip has a length of l 3=8.3mm, strip width is w 6 =1mm.

[0047] As an embodiment of the present invention, Figure 4 As shown, the height of the dielectric substrate 1 is l 1 =8.5mm, width is w 7 =36mm; the width of the resonant ring 2 is w 7 =36mm, height l 4 =7.75mm, the length of the opening is l 9 =0.6mm, width is w 3 =4mm; the transverse branch length of the L-shaped radiation metal strip 9 is l 10 =1mm, width is w 4 =2mm, vertical branch length is l 8 =7mm, width is w 6 =1mm.

[0048] The magnetic resonance near-field parasitic circular polarization antenna array is placed vertically on the metal floor 3 .

[0049] As an embodiment of the present invention, Figure 5 As shown in the figure, the lateral distance and radial distance between each B1 band antenna unit are w 8 =53mm, l 11 =53mm, this distance corresponds to 0.27 wavelengths of the operating frequency 1.5754GHz.

[0050] In some other embodiments of the present invention, HFSS18.0 is used to simulate and analyze the low-profile, compact and miniaturized B1\B3 band dual-frequency co-aperture circularly polarized antenna array in the above embodiment. After simulation and analysis, the parameters and dimensions of some antennas are shown in Table 1 below:

[0051] Table 1 Optimal dimensions of various parameters in this embodiment

[0052]

[0053] According to the above parameters, HFSS is used to analyze the S11 parameters and isolation parameters of the low-profile, compact and miniaturized B1\B3 band dual-frequency co-aperture circularly polarized antenna array in the above embodiment, and the analysis results are as follows:

[0054] like Figure 6 As shown, the -10 dB impedance curve bandwidth of the high-frequency array element of the common-aperture antenna of the embodiment of the present invention is 0.04 GHz, from 1.56 GHz to 1.60 GHz, and the relative bandwidth is 2.5%.

[0055] like Figure 7As shown, the -10 dB impedance curve bandwidth of the low-frequency array element of the common-aperture antenna of the embodiment of the present invention is 0.03 GHz, from 1.26 GHz to 1.29 GHz, and the relative bandwidth is 2.3%.

[0056] like Figure 8 As shown, after the common-aperture antenna array of the embodiment of the present invention is formed, the impedance matching ranges of the high-frequency and low-frequency antennas are 1.26 GHz to 1.29 GHz and 1.56 GHz to 1.60 GHz, respectively, and the relative bandwidths are 2.3% and 2.5%, respectively.

[0057] like Fig. 9 As shown, the isolation coefficient of the high-frequency band magnetic resonant near-field parasitic circularly polarized antenna in the co-aperture array of the embodiment of the present invention has a suppression effect of 20 dB at 1.57 GHz.

[0058] like Fig.10 As shown, the isolation coefficients of the co-aperture array high-band magnetic resonance near-field parasitic circularly polarized antenna and the low-band magnetic resonance near-field parasitic circularly polarized antenna in the embodiment of the present invention have suppression effects of 22 dB and 20 dB at 1.26 GHz and 1.57 GHz, respectively.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A co-aperture circularly polarized antenna array, characterized in that: include: A metal floor, a dielectric substrate four arranged on the upper end surface of the metal floor, a plurality of B1 band magnetic resonance near-field parasitic circular polarization antennas, and a B3 band magnetic resonance near-field parasitic circular polarization antenna arranged at the center of the dielectric substrate four; A plurality of B1 band magnetic resonance near-field parasitic circular polarization antennas are centrally symmetrically arranged around a B3 band magnetic resonance near-field parasitic circular polarization antenna; The B1 band magnetic resonance near-field parasitic circular polarization antenna comprises: a dielectric substrate 1 arranged in pairs and cross-arranged to achieve circular polarization, a resonant ring 2 arranged at the edge of one end surface of the dielectric substrate 1, and an L-shaped radiation metal strip arranged at the other end surface of the dielectric substrate 1; The B3 band magnetic resonant near-field parasitic circularly polarized antenna arrangement includes: dielectric substrates seven arranged in pairs and crossed, a resonant ring eight arranged on the edge of one end surface of the dielectric substrate seven, and a rectangular radiating metal strip arranged on the other end surface of the dielectric substrate seven.

2. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: The pair of cross-arranged dielectric substrates one are perpendicular to each other, and the pair of cross-arranged dielectric substrates seven are perpendicular to each other; the angle formed by the plane where the dielectric substrate seven is located and the plane where any of the dielectric substrates one is located is 45 degrees; two rectangular radiating metal strips are arranged on the B3 band magnetic resonance near-field parasitic circularly polarized antenna, and the two rectangular radiating metal strips have different heights.

3. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: The metal floor, the L-shaped radiating metal strip, the second resonant ring, the eighth resonant ring and the rectangular radiating metal strip are made of copper; The material of the dielectric substrate 1, the dielectric substrate 4 and the dielectric substrate 7 is FR4.

4. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: The L-shaped radiating metal strip and / or the rectangular radiating metal strip are connected to the inner conductor of the coaxial device through the trapezoidal metal strip.

5. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: The resonant ring 2 and / or the resonant ring 8 has a disconnected opening on the edge close to the dielectric substrate 4.

6. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: The planes where the L-shaped radiation metal strip and the rectangular radiation metal strip are located are both perpendicular to the plane where the dielectric substrate 4 is located.

7. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: The resonant ring 2 and the resonant ring 8 are both provided with notches. In the same B1 band magnetic resonance near-field parasitic circular polarization antenna, the resonant ring 2 on the dielectric substrate 1 passes through the notch of the resonant ring 2 of the other dielectric substrate 1 and extends to the other side of the other dielectric substrate 1; in the same B3 band magnetic resonance near-field parasitic circular polarization antenna, the resonant ring 8 on the dielectric substrate 7 passes through the notch of the resonant ring 8 of the other dielectric substrate 7 and extends to the other side of the other dielectric substrate 7.

8. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: There are four B1 band magnetic resonance near-field parasitic circular polarization antennas distributed at the four corners of the rectangular dielectric substrate.

9. The co-aperture circularly polarized antenna array according to claim 1, characterized in that: The spacing between adjacent B1 band magnetic resonance near-field parasitic circular polarization antennas is less than half of their wavelength.

10. A communication device, characterized in that: It comprises the co-aperture circularly polarized antenna array as described in any one of claims 1 to 9.

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