WO2018076491A1

WO2018076491A1 - Compact type multi-beam antenna array with high and low frequency filter elements arranged in interwoven manner

Info

Publication number: WO2018076491A1
Application number: PCT/CN2016/110020
Authority: WO
Inventors: 章秀银; 薛狄; 吴裕锋; 张垚
Original assignee: 华南理工大学
Priority date: 2016-10-26
Filing date: 2016-12-15
Publication date: 2018-05-03
Also published as: CN106410396A

Abstract

Disclosed is a compact type multi-beam antenna array with high and low frequency filter elements arranged in an interwoven manner, comprising a first sub-array working on a first frequency band and a second sub-array working on a second frequency band which are provided on a substrate. The first sub-array and the second sub-array are arranged in an interwoven manner, wherein array elements of one sub-array are distributed dispersedly in spaces between array elements of the other sub-array. The first sub-array is formed by at least one first filter antenna unit without extra loss circuits. The second sub-array is formed by at least one second filter antenna unit without extra loss circuits. The entire array is arrayed and arranged in an interwoven manner by array elements of two frequency bands, which can reduce the size compared with the design of high frequency array elements and low frequency array elements being arrayed and arranged in a separated manner. Comparing with the design of array elements without a filter property being arrayed in an interwoven manner, the intercoupling effect between the array elements is smaller, which can maintain a good isolation performance.

Description

A compact multi-beam antenna array with high and low frequency filtering array interleaved arrangement

Technical field

The present invention relates to the field of mobile communications, and in particular to a compact multi-beam antenna array in which high and low frequency filter oscillators are interleaved.

Background technique

With the explosive increase in the amount of data, more and more demands have been placed on the capacity of communication systems, especially in places with particularly large traffic, such as squares, stations, scenic spots, and dormitories. On the one hand, channel capacity can be increased by in-band bandwidth or carrier bandwidth. Since the bandwidth of a single antenna is typically narrow, multi-passband base station antenna arrays are often used to simultaneously support multiple wireless system standards. On the other hand, it is also possible to increase the capacity of the channel by reducing the coverage of the base station antenna, that is, increasing the number of antennas. However, these methods often lead to an increase in the occupied area and construction costs. In order to solve the problem of communication capacity without increasing the occupied physical space, a multi-beam array can be used.

For reducing the size of the antenna array, a way of interlacing has been proposed, the reference "F.Hyjazie, P. Watson, and H. Bouteayb, "Dual band interleaved base station phased array antenna with optimized cross-dipole and EBG. /AMC structure,"in Proc. IEEE Antennas Propag. Soc. Int. Symp., 2014, pp. 1558-1559." However, since the array has no filtering characteristics, the mutual coupling performance is affected. In order to overcome the defects of coupling and structural complexity, the literature "Y.Zhang, XYZhang, L.Ye, and Y.-M.Pan, "Dual-band base-station array using filtering antenna elements for mutual coupling suppression," IEEE Trans.Antennas Propag., vol. 64, no. 8, pp. 3423-3430, Aug. 2016 proposes a compact multi-frequency base station antenna array, but the array has only one beam per band.

In engineering applications, multi-beam base station arrays such as 3G (1710-2170MHz) and LTE (2490-2690MHz) are designed. There are two commonly used methods. One is to use one column to cover the entire 3G and LTE antennas (1710-2690MHz). The cells form an array, and a duplexer is cascaded at the front end to decouple the operating frequency bands by designing a high isolation duplexer. However, the duplexer will inevitably bring cascading losses, affecting the gain of the antenna. In addition, this solution uses only one array, so independent ESC downtilt can not be performed for each band during WLAN optimization. The second method is to use two sub-arrays covering the 3G frequency band and the LTE frequency band in parallel, and a decoupling network is added between the two sub-arrays to achieve the decoupling effect. However, these decoupling networks will increase Adding the width of the antenna array also affects the radiation performance of the antenna such as radiation efficiency, front-to-back ratio, gain, and the like.

Summary of the invention

In order to overcome the problem of excessive size of the high-frequency and low-frequency array separation arrangement array of the multi-frequency base station in the prior art and the mutual coupling and isolation performance of the non-filtering characteristic matrix interleaving array, the present invention provides a high-low frequency filter oscillator. Interlaced array of compact multi-beam antennas.

The invention adopts the following technical solutions:

A compact multi-beam antenna array in which high and low frequency filter oscillators are interlaced, comprising a first sub-array operating on a substrate and a second sub-array operating on a second frequency band, the first sub-array And the second sub-array is interleaved, wherein the array elements of one sub-array are dispersedly distributed in a space between the other sub-array array elements, and the first sub-array is composed of at least one first filter antenna unit without an additional loss circuit. The second sub-array is comprised of at least one second filtered antenna element without an additional loss circuit.

The first filter antenna unit and the second filter antenna unit are specifically a dual-polarization filter antenna with high selectivity and low cross-polarization, including a first dielectric substrate and a second dielectric substrate in order from top to bottom. Supporting the third dielectric substrate and the fourth dielectric substrate;

The upper surface of the first dielectric substrate prints a parasitic radiation metal patch for generating and controlling a radiation zero at a high frequency of the radiant passband;

Printing a main radiation metal patch and two feed lines on the second dielectric substrate;

The lower surface of the fourth dielectric substrate is a metal floor.

The main radiating metal patch is printed on the upper surface of the second dielectric substrate, the two feeding lines are respectively a first feeding line and a second feeding line, and the first and second feeding lines are all H-shaped and orthogonally coupled. The first feed line is printed on a lower surface of the second dielectric substrate, and a part of two vertical lines and a middle horizontal line of the H-type in the second feed line are printed on a lower surface of the second dielectric substrate, and a second horizontal line of the second feed line Another portion is printed on the upper surface of the second dielectric substrate and is joined to a portion printed on the lower surface by a metallized via, the geometric center of the second dielectric substrate coinciding with the geometric center of the main radiant metal patch.

The second dielectric substrate further includes an annular groove line for separating another portion of the second transverse line of the second feed line from the main radiating metal patch, and further comprising a supporting aluminum plate disposed on a lower surface of the metal floor.

The first sub-array and the second sub-array are arranged in parallel by a column or more of the filter antenna unit sub-columns. In the sub-array, the n-th sub-column and the n+1th sub-column are alternately staggered, nth The sub-column and the n+2 sub-column are arranged side by side in parallel.

In the first and second sub-arrays, three adjacent array elements located in the nth, n+1th, and n+2th sub-columns The triangles are arranged to increase the distance between the elements.

There is only one sub-column of the second sub-array between the n-th sub-column and the n+2 sub-column of the first sub-array.

The first sub-array is composed of 16 first filter antenna units arranged in a 4×4 arrangement, and the second sub-array is composed of 16 second filter antenna units arranged in a 4×4 arrangement.

Each sub-array is fed by a beam-formed network containing a Butler matrix and a power divider.

Two or multiple beams are implemented by controlling the beamforming network for single or dual polarization.

The beneficial effects of the invention:

(1) The two high and low frequency patch arrays of the present invention have filtering characteristics, can realize efficient radiation in the band, and effectively suppress the out-of-band, and the passband edge of the gain is quickly rolled off, and the duplexer or the decoupling network can be omitted. In the case of the case, the mutual coupling between the operating frequency bands is reduced.

(2) The interlaced array of the present invention can reduce the size compared to the high and low frequency array separation arrangement array, and the mutual coupling effect is small compared to the filterless array interlaced array, which can maintain good isolation performance, that is, The antenna array of the high frequency filter array and the low frequency filter array filter array of the present invention takes into consideration the advantages of small size and good isolation performance.

DRAWINGS

1 is a top plan view of a compact multi-beam antenna array in which high and low frequency filtering arrays are interleaved according to an embodiment of the present invention;

2 is a schematic diagram of a split structure of a filter antenna unit according to an embodiment of the present invention;

Figure 3 is a side elevational view of the filter antenna unit shown in Figure 2;

Figure 4 is a front elevational view of the filter antenna unit shown in Figure 2;

Figure 5 is a plan view of the filter antenna unit shown in Figure 2;

Figure 6 is a diagram showing the upper surface of the second dielectric substrate of the filter antenna unit shown in Figure 2;

Figure 7 is a view showing the lower surface of the second dielectric substrate of the filter antenna unit shown in Figure 2

Figure 8 is a bottom plan view of the filter antenna unit shown in Figure 2;

9 is a schematic diagram of a feed network including a Butler matrix and a power splitter in front of each 2×8 subarray in the compact multi-beam antenna array of the high and low frequency filter array interleaving shown in FIG. 1.

Figure 10 is the S parameter of the filtering unit in the 3G band.

Figure 11 is an S parameter of the filtering unit in the LTE band.

Figure 12 is the gain of the 3G band and the LTE band when the first port of the filtering unit is fed.

Figure 13 is a gain of the 3G band and the LTE band when the second port of the filtering unit is fed.

FIG. 14 is a reflection coefficient of four input ports of a feed network connected to a first sub-array of an array according to an embodiment of the present invention.

FIG. 15 is a reflection coefficient of four input ports of a feed network connected to a second sub-array of an array according to an embodiment of the present invention.

FIG. 16 is a diagram showing transmission coefficients between four input ports of a feed network connected to a first sub-array of an array according to an embodiment of the present invention.

17 is a transmission coefficient of four input ports of a feed network connected to a second sub-array of an array according to an embodiment of the present invention.

FIG. 18 is a diagram showing transmission coefficients between four input ports of a feed network and a feed port of a feed network connected to a second sub-array of the first sub-array of the array according to an embodiment of the present invention.

19 is a horizontal radiation pattern of a first beam of a first polarization mode at a second sub-array of an array according to an embodiment of the present invention;

20 is a horizontal radiation pattern of a second beam of a first polarization mode at a second sub-array of an array according to an embodiment of the present invention;

21 is a horizontal radiation pattern of a first beam of a second polarization mode of the first sub-array of the array according to an embodiment of the present invention;

22 is a horizontal radiation pattern of a first beam of a second polarization mode of the first sub-array of the array according to an embodiment of the present invention;

23 is a horizontal radiation pattern of a first beam of a first polarization mode at 2.6 GHz of a second sub-array of an array according to an embodiment of the present invention;

24 is a horizontal radiation pattern of a second beam of a first polarization mode at 2.6 GHz of a second sub-array of an array according to an embodiment of the present invention;

25 is a horizontal radiation pattern of a first beam of a second polarization mode at 2.6 GHz of a second sub-array of an array according to an embodiment of the present invention;

26 is a horizontal radiation pattern of a second beam of a second polarization mode at 2.6 GHz of a second sub-array of an array according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

Example

A compact multi-beam antenna array in which high and low frequency filter oscillators are interleaved, comprising being disposed on a substrate The first sub-array working in the first frequency band and the second sub-array operating in the second frequency band, the first sub-array and the second sub-array are interleaved, wherein the array elements of one sub-array are dispersedly distributed in another a space between the sub-array elements, the first sub-array being composed of at least one first filter antenna unit without an additional loss circuit, the second sub-array being composed of at least one second filter antenna unit without an additional loss circuit The number of array elements of the two subarrays may be the same or different, and the first frequency band and the second frequency band are completely different.

By using the filter antenna unit without the external loss circuit as the array of the multi-frequency base station antenna array, the interlaced array is arranged, and the size can be reduced compared to the high-low frequency array separation arrangement, compared with the mutual interference array without the filter characteristic. The coupling effect is small and can maintain good isolation performance. That is, the advantages of small size and good isolation performance are taken into consideration.

For the convenience of description, the following is a description of the mechanism of the antenna array provided by the embodiment of the present invention. The embodiment of the present invention is not limited to the dual-frequency dual-polarized dual beam. The base station antenna array should include all of the multi-frequency multi-beam dual-polarized or single-polarized base station antenna arrays having the features of the present invention.

As shown in FIG. 1, the first sub-array 1 operating on the first frequency band and the second sub-array 2 operating in the second frequency band are disposed on the substrate 3, and the first sub-array and the second sub-array are interleaved. The first frequency band is different from the second frequency band, for example, the first frequency band is the 3G frequency band (1710-2170MHz), and the second frequency band is the LTE frequency band (2490-2690MHz). Of course, the two frequency bands are only used for illustration, and Not for use in restrictions. The first sub-array and the second sub-array are interleaved, wherein array elements of one sub-array are dispersedly distributed in a space between another sub-array array element.

In Fig. 1, L1-L16 represent the array elements of the first sub-array, and H1-H16 represent the array elements of the second sub-array.

The first sub-array is composed of at least one first filter antenna unit without an additional loss circuit, and the second sub-array is composed of at least one second filter antenna unit without an external loss circuit, and the filter characteristics of the filter antenna unit itself are two The mutual coupling between the column sub-arrays is greatly reduced. The first filter antenna unit and the second filter antenna unit have the same structure but different sizes due to different operating frequencies. In the embodiment shown in FIG. 1, the first filtered antenna unit having a large size operates at a lower frequency first. In the frequency band (for example, the 3G frequency band), the second filter antenna unit having a small size operates in the second frequency band with higher frequency (for example, the LTE frequency band). The size of the substrate 3 can also be set according to the number and size of the sub-arrays.

The first filter antenna unit and the second filter antenna unit are specifically a dual-polarization filter antenna with high selectivity and low cross-polarization, and include a first dielectric substrate 5 and a second dielectric substrate 10 in order from top to bottom. a third dielectric substrate 14 and a fourth dielectric substrate 15 for supporting;

The upper surface of the first dielectric substrate 5 is printed for generating and controlling radiation at a high frequency of the radiant passband Zero-point parasitic radiation metal patch 4;

Printing the main radiation metal patch 9 and the two feeding lines on the second dielectric substrate;

The lower surface of the fourth dielectric substrate 15 is a metal floor 16.

The main radiating metal patch 9 is printed on the upper surface of the second dielectric substrate 10. The two feeding lines are respectively a first feeding line 13 and a second feeding line, and the first and second feeding lines are all H-shaped and positive. Cross-coupling, the first feed line 13 is printed on a lower surface of the second dielectric substrate 10, and two vertical lines of the H-type and a portion 12 of the intermediate horizontal line of the second feed line are printed on a lower surface of the second dielectric substrate, Another portion 7 of the second transverse line of the second feed line is printed on the upper surface of the second dielectric substrate 10 and is connected to a portion printed on the lower surface by two metallized vias 6, the geometric center and the main radiation of the second dielectric substrate The geometric centers of the metal patches coincide.

The second dielectric substrate 10 further includes an annular groove line 8 for separating another portion of the second transverse line of the second feeder from the main radiant metal patch 9; further comprising a supporting aluminum plate 17 disposed on the metal floor 16 lower surface.

Preferably, the first sub-array and the second sub-array are composed of a column or more of the filter antenna unit sub-columns arranged in parallel, and the n-th sub-column and the n+1th sub-column are arranged in parallel in the sub-array. The nth sub-column and the n+2 sub-column are arranged side by side in parallel.

Preferably, in the first and second sub-arrays, three adjacent array elements located in the nth, n+1th, and n+th sub-columns are arranged in a triangle to increase the relationship between the array elements. distance.

Preferably, in the compact multi-beam antenna array, only one sub-column of the second sub-array exists between the n-th sub-column and the n+2 sub-column of the first sub-array.

Preferably, in the compact multi-beam antenna array, the first sub-array is composed of 16 first filter antenna units in a 4×4 arrangement, and the second sub-array is composed of 16 second filter antenna units in a 4×4 arrangement. .

Preferably, each of the sub-arrays is fed by two beam-formed networks including a Butler matrix and a power divider, respectively controlling two polarization modes of the sub-array.

Preferably, the compact multi-beam antenna array implements two or multiple beams by controlling a beamforming network for single polarization or dual polarization.

The structure of the first filter antenna unit and the second filter antenna unit will be described in detail below with reference to FIGS. 2-8. The first filter antenna unit and the second filter antenna unit have substantially the same structure except for the difference in size. For convenience of description, in the following description with reference to FIGS. 2-8, the filter antenna unit is uniformly used to represent the first filter antenna unit and the second filter antenna unit.

As shown in FIGS. 2, 3, and 4, the filter antenna units each include a first dielectric substrate 5, a second dielectric substrate 10, and a third dielectric plate 14 and a fourth dielectric plate 15 for supporting, and a supporting aluminum plate 17. First medium base A parasitic radiation metal patch 4 is disposed on the upper surface of the board 5, and an upper surface portion 7 of the main radiation metal patch 9 and the second H-shaped feeder line is disposed on the upper surface of the second dielectric substrate 10, and the second dielectric substrate 10 is disposed on the upper surface of the second dielectric substrate 10. A first H-shaped feeder 13 and a lower portion 12 of the second H-shaped feeder are disposed on the lower surface, and the lower surface of the fourth dielectric substrate 15 is provided with a metal floor 16. The parasitic radiation metal patch 4, the main radiation metal patch 9 and the metal floor 16 are all metal plating. A metal shorting probe 6 is connected between the upper surface portion 7 and the lower surface portion 12 of the second H-shaped feeder. Specifically, as shown in FIGS. 2, 3, and 4, two metal probes 6 are provided. As shown in Figures 2, 3 and 4, a supporting aluminum plate 17 is provided. As shown in Fig. 8, the center of the supporting aluminum plate has a square groove for the coaxial line of the input feeding, and the reference numeral 11 is the inside of the coaxial line. The core, the annular groove line 8 at the geometric center of the primary radiating metal patch 9.

The first dielectric substrate 5, the second dielectric substrate 10, and the third dielectric plate 14 and the fourth dielectric plate 15 for support are both made of F4B material and have a dielectric constant of 2.65.

Preferably, as shown in Figures 2, 3 and 4, the total length of the first feed line 13 and the second feed line is about one quarter of the wavelength, and the position of the zero point can be adjusted by adjusting the length of the feed line.

As shown in FIG. 9, it is a beamforming network of an embodiment of the present invention and its connection with a filtering unit. Preferably, the beamforming network is composed of a Butler matrix and a power splitter. The Butler matrix has two input ports (A, B) that control different beams of the same polarization mode of the sub-array. The first sub-array first polarization mode Butler matrix has four output ports (C, D, E, F), each port of the Butler matrix and a one-fourth splitter ( H, M, N, P) connections. The four output ports of the power splitter H are respectively connected to the filtering units of the four 3G frequency bands of the first sub-column of the first sub-array. The four output ports of the power splitter M are respectively connected to the filtering units of the four 3G frequency bands of the second sub-column of the first sub-array. The four output ports of the power splitter N are respectively connected to the filtering units of the four 3G frequency bands of the third sub-column of the first sub-array. The four output ports of the power splitter P are respectively connected to the filtering units of the four 3G frequency bands of the fourth sub-column of the first sub-array. The first sub-array second polarization mode, the second sub-array first polarization mode, and the second sub-array second polarization mode beamforming network are similar.

In an exemplary embodiment of the present invention, there are two filter frequency antenna units in the 3G frequency band and the LTE frequency band, respectively, which do not have an external loss circuit, and the two filter antenna units adopt the circuit structure shown in FIG. The working frequency bands are different, so the specific circuit size is different, and the circuit design dimensions of the corresponding filter antenna unit without the external loss circuit are as follows:

The design dimensions of the array are as follows: Lx=1.10mm888888888888888888888888888888888888888888888888

In this embodiment, the working frequency bands of the two sub-arrays are 1710-2170 MHz and 2490-2690 MHz, and the sub-arrays of the 3G frequency band are efficiently radiated in the working frequency band 1710-2170 MHz, and the radiation is suppressed in the outband band, ie, the LTE frequency band (2490-2690 MHz); At the same time, the sub-array of the LTE frequency band radiates efficiently in its operating frequency range of 2490-2690 MHz MHz, and suppresses radiation in the out-of-band, ie, 3G frequency band (1710-2170 MHz). Therefore, the radiation between the two sub-arrays does not interfere with each other, thereby reducing mutual interference and achieving higher port isolation.

As shown in FIG. 10, it is a reflection coefficient S-parameter of a filter antenna unit of an external lossless circuit operating in the 3G frequency band according to an embodiment of the present invention. It can be seen that there are two resonance modes in the working frequency band of 1710-2170MHz, and in the S11-frequency curve, S11 is lower than -15dB in the 3G frequency band. In the S21-frequency curve, S21 is below -30 dB in the 3G band.

As shown in FIG. 11, it is a reflection coefficient S-parameter of a filter antenna unit of an LTE band without an external loss circuit provided by an embodiment of the present invention. It can be seen that there are also two resonance modes in the working frequency band of 2490-2690MHz. In the S11-frequency curve, S11 is lower than -15dB in the LTE frequency band. In the S21-frequency curve, S21 is below -30 dB in the LTE band.

As shown in FIG. 12 and FIG. 13 , respectively, one port ( FIG. 12 ) and two ports ( FIG. 13 ) of the filter antenna unit of the 3G band and the LTE band without the external loss circuit provided by the embodiment of the present invention are respectively excited. The gain-frequency curve shows that the gain in the 3G band is about 8.5 dBi, while the gain in the LTE band is about 8.2 dBi, and the gain of the radiated zero is below -20 dBi. The passband edge is steep, the sideband suppression is obvious, the selectivity is good, and the in-band gain is flat.

As shown in FIG. 14, 15, 16, 17, and 18, it is a simulation result graph of reflection coefficient-frequency, transmission coefficient-frequency of a compact multi-beam antenna array in which high and low frequency filter arrays are interleaved according to an example of the present invention. It can be seen that in the entire 3G frequency band (1710-2170MHz) and the LTE frequency band (2490-2690MHz), the S11 of the array is lower than -22dB, indicating that the matching of the port is good. In the entire 3G frequency band (1710-2170MHz) and LTE frequency band (2490-2690MHz), the S12 of the array is lower than -25dB, indicating that the mutual coupling between the sub-arrays of the array is small and the port isolation is high. At the same time, as shown in FIGS. 17 and 18, the beam isolation of the array reaches 15 dB in the entire 3G frequency band (1710-2170 MHz) and the LTE frequency band (2490-2690 MHz), indicating that the beam isolation of the array is good. Figure 19-26 shows the horizontal plane pattern of each beam of the antenna array at 2.0 GHz and 2.6 GHz, respectively, which also shows that the antenna array is stable. Radiation pattern.

Embodiments of the present invention have the following advantages:

1. Integrated filter characteristics and radiation characteristics, the antenna array itself has filtering performance, the passband edge is steep, the sideband suppression is obvious, and the frequency selection characteristic is good. No additional duplexer or decoupling network circuit is needed, and the use of extra duplex is overcome. Or decoupling networks are prone to large losses;

2. The antenna array is suitable for the 3G frequency band and the LTE frequency band, and realizes high isolation of the port, suppresses the interference of the adjacent frequency, and improves the performance of the base transceiver station without the need of the decoupling circuit;

3. The sub-array of the antenna array is interleaved, and the array consisting of the high-frequency filtering matrix and the low-frequency filtering matrix filtering matrix interleaving arrangement is fed through a feeder network design including a Butler matrix, which can be compacted. Type multi-beam base station antenna array, which reduces the size of the array compared to the split arrangement array;

4. The whole structure is mainly composed of metal patch, metalized via, dielectric plate through hole and ring groove, which has simple structure and simple design.

5. The antenna array is a multi-beam array with narrow beam and high gain, which is suitable for sector division and can cover a long distance.

6. The beam isolation effect of the antenna array is good.

The embodiments provided by the present invention are applicable to the field of wireless mobile communication base stations, and can be applied to receiving and transmitting devices of various types of wireless communication systems. Due to the filtering characteristics of the present invention, the invention is particularly suitable for use in an open complex multi-band multi-standard communication scenario. , base station antennas operating in the 3G band and the LTE band. At the same time, benefiting from the integration of the filtering characteristics and the radiation characteristics, the present invention is also applicable to the integration and integration of wireless mobile communication system equipment, reducing design requirements, and improving the ability of communication equipment to resist adjacent frequency interference.

In the array of the high-frequency filtering matrix and the low-frequency filtering matrix interleaving arrangement of the embodiment of the present invention, a compact multi-beam base station antenna array can be realized by feeding through a feeding network including a Butler matrix. An exemplary compact base station antenna array achieves two beam coverage 120[deg.] sectors in the horizontal plane, and the vertical plane forms a narrow beam radiation pattern of sidelobe suppression. Due to the filtering characteristics of the interleaved patch array, the mutual coupling between the high frequency array and the low frequency array is greatly reduced.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments, and any other changes, modifications, substitutions, and combinations may be made without departing from the spirit and scope of the present invention. And simplifications, all of which are equivalent replacement means, are included in the scope of protection of the present invention.

Claims

A compact multi-beam antenna array in which high and low frequency filter oscillators are interleaved, comprising: a first sub-array operating on a first frequency band disposed on a substrate; and a second sub-array operating in a second frequency band, The first sub-array and the second sub-array are interleaved, wherein array elements of one sub-array are dispersedly distributed in a space between another sub-array array, and the first sub-array is subjected to at least one first filtering without an additional loss circuit The antenna unit is configured. The second sub-array is composed of at least one second filter antenna unit without an external loss circuit, and the first frequency band and the second frequency band are completely different.
The compact multi-beam antenna array according to claim 1, wherein the first filter antenna unit and the second filter antenna unit are specifically a dual-polarization filter antenna with high selectivity and low cross polarization. a first dielectric substrate, a second dielectric substrate, a third dielectric substrate for supporting, and a fourth dielectric substrate are sequentially arranged from top to bottom;

The upper surface of the first dielectric substrate prints a parasitic radiation metal patch for generating and controlling a radiation zero at a high frequency of the radiant passband;

Printing a main radiation metal patch and two feed lines on the second dielectric substrate;

The lower surface of the fourth dielectric substrate is a metal floor.
The compact multi-beam antenna array according to claim 2, wherein the main radiating metal patch is printed on an upper surface of the second dielectric substrate, and the two feeding lines are a first feeding line and a second feeding line, respectively. The first and second feed lines are all H-shaped and orthogonally coupled, the first feed line is printed on a lower surface of the second dielectric substrate, and two vertical lines and a middle horizontal line of the H-type in the second feed line One portion is printed on a lower surface of the second dielectric substrate, and another portion of the second horizontal line of the second feed line is printed on the upper surface of the second dielectric substrate, and is connected to a portion printed on the lower surface through the metalized via, the second medium The geometric center of the substrate coincides with the geometric center of the main radiating metal patch.
The compact multi-beam antenna array according to claim 3, wherein said second dielectric substrate further comprises an annular groove line for separating another portion of the second transverse line of the second feed line from the main radiating metal patch, Also included is a support aluminum plate that is disposed on a lower surface of the metal floor.
The compact multi-beam antenna array according to claim 1, wherein the first sub-array and the second sub-array are composed of a column or more of filter antenna unit sub-columns arranged in parallel, and in the sub-array, the nth The sub-column and the n+1th sub-column are alternately staggered, and the nth sub-column and the n+2 sub-column are arranged side by side in parallel.
The compact multi-beam antenna array according to claim 5, wherein in the first and second sub-arrays, three adjacent array elements in the nth, n+1th, and n+th sub-columns Triangle line Cloth to increase the distance between the elements.
The compact multi-beam antenna array of claim 1 wherein only one sub-column of the second sub-array exists between the n-th sub-column and the n+2 sub-column of the first sub-array.
The compact multi-beam antenna array according to claim 1, wherein the first sub-array is composed of 16 first filter antenna units in a 4×4 arrangement, and the second sub-array is composed of 16 second filter antenna units. 4 × 4 arrangement.
The compact multi-beam antenna array of claim 1 wherein each sub-array is fed by two beam-formed networks comprising a Butler matrix and a power divider.
The compact multi-beam antenna array of claim 1 wherein two or more beams are implemented by controlling the beamforming network for single or dual polarization.