Full-wave radiation unit

Abstract

The invention discloses a full-wave radiation unit, and aims to solve the technical problems that an existing die-casting 1727 oscillator radiation unit is low in gain, and an oscillator processing material is made of a double-sided copper-clad plate, is high in price and is difficult to adapt to market competition. Comprising a PCB radiation plate, and the PCB radiation plate comprises a PCB dielectric substrate, and a folded dipole and a microstrip line which are arranged on the PCB dielectric substrate. The radiating surface and the oscillator base are made of FRA4 single-sided copper-clad plates, so that the production cost is lower, original double-sided copper-clad coupling points are changed into cross coupling, the unit isolation and high gain can be effectively improved, the PIM index requirement can be ensured, and the antenna has the advantages of small horizontal beam width fluctuation, ultra-wideband characteristic and the like; and the self-isolation degree and the system isolation degree between the two columns are improved, and the debugging difficulty is obviously improved, so that the coupling among the oscillators and the influence among the oscillators can be effectively reduced in the ultra-wideband narrow-spacing multi-frequency antenna array layout.

Description

Technical Field

[0001] The invention belongs to the technical field of mobile communications, and in particular relates to a full-wave radiation unit. Background Art

[0002] With the rapid development of mobile communication technology, multiple systems and multiple standards coexist, and the requirements for base station array antennas are getting higher and higher. Antenna integration and broadband have become the development trend. In the common frequency band of dual-polarization directional base station array antennas, the operating frequency of DCS network is 1710MHz-1800MHz, the operating frequency of PCS is 1850MHz-1990MHz, and the operating frequency of UMTS is 1920MHz-2170MHz. With the development of LTE and TD-LTE, the use of base station antennas not only needs to meet the requirements of broadband, but also its radiation performance is equally important.

[0003] The existing 1727 vibrator radiation unit gain is relatively low and cannot meet the market demand for high-gain antennas. The coupling between the vibrators is easily affected in the ultra-wideband, narrow spacing, and multi-frequency antenna array layout. The die-cast full-wave cannot meet the 1727 frequency band requirements, and the aperture will be too large. At the same time, the vibrator processing material uses double-sided copper clad laminate, which is too expensive and difficult to adapt to market competition. Summary of the invention

[0004] (1) Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a full-wave radiation unit, which is intended to solve the technical problems that the existing die-cast 1727 vibrator radiation unit has low gain and the vibrator processing material uses double-sided copper clad laminate, which is too expensive and difficult to adapt to market competition.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides such a full-wave radiation unit, which includes a PCB radiation board, the PCB radiation board includes a PCB dielectric substrate, a folded vibrator and a microstrip line arranged on the PCB dielectric substrate, the PCB dielectric substrate is a single-layer PCB, the folded vibrator and the microstrip line are located in the same plane, and cross-coupling is achieved between adjacent microstrip lines and adjacent folded vibrators;

[0008] The coupling feed plate and the vibrator base, the PCB radiation plate and the vibrator base are respectively installed at the upper and lower ends of the coupling feed plate;

[0009] A feeding line is arranged on the coupling feeding plate, and the PCB radiation board and the vibrator base are connected to each other through the feeding line to form a microstrip transmission line for feeding the PCB radiation board.

[0010] Preferably, the PCB dielectric substrate is square and has chamfers at the four corners. There are four groups of folded vibrators, which are fixed at the four corners of one side of the PCB dielectric substrate away from the coupling feed plate to form a field-shaped structure. The folded vibrators are located on the inner side of the microstrip line.

[0011] Furthermore, the folded vibrator includes two vibrator arms and two folded vibrators, the parts of the two vibrator arms close to the middle of the PCB dielectric substrate are connected to each other and form a fixing part, and the parts of the two vibrator arms away from the middle of the PCB dielectric substrate are separated from each other and then approach and are fixedly connected to the folded vibrator.

[0012] Furthermore, the two vibrator arms and the two folded vibrators are symmetrically arranged along the diagonal line of the PCB dielectric substrate.

[0013] Furthermore, there are four groups of microstrip lines, which respectively surround the center point of the PCB dielectric substrate and are evenly and symmetrically arranged on four sides of the PCB dielectric substrate along the horizontal and vertical directions.

[0014] Furthermore, the microstrip line includes a first coupling line and a second coupling line arranged at two ends of the feeding line, and the second coupling line extends to the inside of the adjacent first coupling line and forms an S-shaped gap.

[0015] Furthermore, the first coupling line includes a first connecting portion and a first extending portion connected to the folded vibrator on one side, a groove is formed between the first extending portion, the first connecting portion and the folded vibrator, and the second coupling line includes a second connecting portion and a second extending portion connected to the folded vibrator on the other side, and the other end of the second extension portion is located inside the groove.

[0016] Furthermore, nylon rivet fixing holes are provided at the four corners of the vibrator base, and the vibrator base is made of FRA4 single-sided copper clad plate.

[0017] Furthermore, the coupled feed plate includes a first feed plate and a second feed plate, and a feeding point is provided at the bottom end of the first feed plate and the second feed plate and located on the feed line.

[0018] Furthermore, the top ends of the first feed plate and the second feed plate are fixedly connected to the first fixing block, the bottom ends of the first feed plate and the second feed plate are fixedly connected to the second fixing block, a first through hole is opened on the PCB dielectric substrate and located at the fixing portion, the first fixing block is located in the first through hole and fixedly connected to the PCB dielectric substrate, a second through hole is opened on the vibrator base, the second fixing block is located in the second through hole and fixedly connected to the vibrator base.

[0019] (3) Beneficial effects

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the above scheme, the newly designed 1727PCB full-wave oscillator unit of the present invention has a small caliber, high gain, convenient assembly, good consistency, and easy production. In the ultra-wideband narrow-pitch array arrangement, the oscillators will not affect each other due to the large caliber. At the same time, the oscillators are installed and fixed with nylon rivets, which is easy and quick to install;

[0022] 2. In the above scheme, the present invention adopts FRA4 single-sided copper clad board for the radiation surface and the vibrator base, which not only reduces the production cost, but also changes the original double-sided copper clad coupling point into cross coupling, which can also effectively improve the unit isolation and high gain, and can also meet the PIM index requirements. It has the advantages of small horizontal plane beam width fluctuation and ultra-wideband characteristics, and improves the self-isolation and the system isolation between the two columns. The isolation is increased from the original 26dB to 28dB, and the debugging difficulty is significantly improved. The gain is increased by 0.8-1d compared with the suppressed vibrator, so that in the ultra-wideband narrow-spacing multi-frequency antenna array layout, the coupling between the vibrators and the mutual influence can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded structure of the full-wave radiation unit;

[0024] Figure 2 It is a schematic diagram of the front view structure of the full-wave radiation unit;

[0025] Figure 3 Schematic diagram of the top view of the full-wave radiation unit;

[0026] Figure 4 For full-wave radiating units Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the coupled feeding plate of the full-wave radiation unit;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the oscillator base of the full-wave radiation unit.

[0029] The marks in the accompanying drawings are: 1, PCB radiation plate; 2, PCB dielectric substrate; 3, folded vibrator; 4, microstrip line; 5, feeding line; 6, coupled feeding plate; 7, vibrator base; 201, chamfer; 202, first through hole; 301, vibrator arm; 302, folded vibrator; 303, fixing part; 401, feeding line; 402, first coupling line; 403, second coupling line; 404, S-shaped gap; 4021, first extension part; 4022, first connecting part; 4023, groove; 4031, second extension part; 4032, second connecting part; 601, first feeding plate; 602, second feeding plate; 603, feeding point; 604, first fixing block; 605, second fixing block; 701, nylon rivet fixing hole; 702, second through hole. DETAILED DESCRIPTION

[0030] This specific implementation is a full-wave radiation unit, and its structural schematic diagram is as follows Figure 1-Figure 6 As shown, the full-wave radiation unit includes a PCB radiation board 1, the PCB radiation board 1 includes a PCB dielectric substrate 2, a folded vibrator 3 and a microstrip line 4 arranged on the PCB dielectric substrate 2, the PCB dielectric substrate 2 is a single-layer PCB, and the folded vibrator 3 and the microstrip line 4 are located in the same plane, and cross-coupling is achieved between adjacent microstrip lines 4 and adjacent folded vibrators 3;

[0031] The coupling feed plate 6 and the vibrator base 7, the PCB radiation plate 1 and the vibrator base 7 are respectively installed at the upper and lower ends of the coupling feed plate 6;

[0032] A feeding line 5, the feeding line 5 is arranged on a coupling feeding plate 6, the PCB radiation board 1 and the vibrator base 7 are connected to each other through the feeding line 5, forming a microstrip transmission line for feeding the PCB radiation board 1;

[0033] By using FRA4 single-sided copper clad board material for the radiation surface of the PCB radiation board 1 and the vibrator base 7, not only the production cost is lowered, but also the original double-sided copper clad coupling point is changed to cross coupling, which can also effectively improve the unit isolation and high gain, and can also meet the PIM index requirements. It has the advantages of small horizontal plane beam width fluctuation and ultra-wide band characteristics, and improves the self-isolation and the system isolation between the two columns. The isolation is increased from the original 26dB to 28dB, the debugging difficulty is significantly improved, and the gain is increased by 0.8-1d compared with the suppressed vibrator.

[0034] like Figure 1 and Figure 3As shown, in this embodiment, the PCB dielectric substrate 2 is square and has chamfers 201 at the four corners. The folded vibrators 3 are divided into four groups. The four groups of folded vibrators 3 are fixed at the four corners on one side of the PCB dielectric substrate 2 away from the coupling feeding plate 6 to form a field-shaped structure. The folded vibrator 3 is located on the inner side of the microstrip line 4. The folded vibrator 3 includes two vibrator arms 301 and two folded vibrators 302. The parts of the two vibrator arms 301 close to the middle part of the PCB dielectric substrate 2 are connected to each other and form a fixing part 303. The parts of the two vibrator arms 301 away from the middle part of the PCB dielectric substrate 2 are separated from each other and then approached and fixedly connected to the folded vibrator 302.

[0035] A circuit for radiating electromagnetic waves is specifically arranged on the PCB dielectric substrate 2. The PCB dielectric substrate 2 adopts FRA4 single-sided copper-clad plate material to reduce costs. By adjusting the coupling degree and impedance matching between the microstrip line 4 and the folded vibrator 3, the standing wave and isolation indicators of the radiation unit can be improved.

[0036] In this embodiment, the two vibrator arms 301 and the two folded vibrators 302 are symmetrically arranged along the diagonal line of the PCB dielectric substrate 2, which makes the whole more beautiful.

[0037] like Figure 1 and Figure 3 As shown, in this embodiment, there are four groups of microstrip lines 4, which respectively surround the center point of the PCB dielectric substrate 2 and are evenly and symmetrically arranged on the four sides of the PCB dielectric substrate 2 along the horizontal and vertical directions. The microstrip lines 4 include a feed line 401, a first coupling line 402 and a second coupling line 403 arranged at both ends of the feed line 401, and the second coupling line 403 extends to the inside of the adjacent first coupling line 402 and forms an S-shaped gap 404. The shape of the S-shaped gap 404 is similar to an S shape, which is not specifically limited and can be any shape that increases the coupling effect.

[0038] Such a design enables the dipole arm 301 and the folded dipole 302 to form a circuit for radiating electromagnetic waves through the first coupling line 402, the second coupling line 403 and the feeding line 401, and to couple through the S-shaped gap 404 to form a larger equivalent area for radiating electromagnetic waves, thereby improving the gain index of the antenna radiation unit.

[0039] like Figure 3 As shown, in this embodiment, the first coupling line 402 includes a first connecting portion 4022 and a first extending portion 4021 connected to the folded vibrator 302 on one side, a groove 4023 is formed between the first extending portion 4021, the first connecting portion 4022 and the folded vibrator 302, and the second coupling line 403 includes a second connecting portion 4032 and a second extending portion 4031 connected to the folded vibrator 302 on the other side, and the other end of the second extending portion 4031 is located inside the groove 4023.

[0040] Specifically, the feeding line 401 has an arc transition with the first coupling line 402 and the second coupling line 403 at both ends. The first connecting portion 4022 and the second connecting portion 4032 are both smaller than the width of the folded vibrator 302. The S-shaped gap 404 is surrounded by the first connecting portion 4022, the first extending portion 4021, the second connecting portion 4032 and the second extending portion 4031.

[0041] like Figure 1 and Figure 6 As shown, in this embodiment, nylon rivet fixing holes 701 are provided at four corners of the vibrator base 7, and the vibrator base 7 is made of FRA4 single-sided copper-clad plate material.

[0042] In this way, the cost of the vibrator base 7 can be reduced, and the vibrator base 7 is installed and fixed with nylon rivets, which is easy and quick to install.

[0043] like Figure 1 and Figure 5 As shown, in this embodiment, the coupling feed plate 6 includes a first feed plate 601 and a second feed plate 602 , and a feeding point 603 is provided at the bottom ends of the first feed plate 601 and the second feed plate 602 and located on the feed line 5 .

[0044] The first feed plate 601 and the second feed plate 602 are cross-connected together, and the feed circuit 5 includes a positive polarization feed circuit and a negative polarization feed circuit, which are respectively arranged on the first feed plate 601 and the second feed plate 602.

[0045] like Figure 1 and Figure 5 As shown, in this embodiment, the top ends of the first feeding plate 601 and the second feeding plate 602 are fixedly connected with the first fixing block 604, the bottom ends of the first feeding plate 601 and the second feeding plate 602 are fixedly connected with the second fixing block 605, a first through hole 202 is provided on the PCB dielectric substrate 2 and located at the fixing portion 303, the first fixing block 604 is located in the first through hole 202 and fixedly connected to the PCB dielectric substrate 2, a second through hole 702 is provided on the vibrator base 7, and the second fixing block 605 is located in the second through hole 702 and fixedly connected to the vibrator base 7.

[0046] When the PCB radiation plate 1 is connected to the coupling feed plate 6, the first fixing block 604 at the top of the first feed plate 601 and the second feed plate 602 is inserted into the first through hole 202, and the second fixing block 605 at the bottom of the first feed plate 601 and the second feed plate 602 is inserted into the second through hole 702, so that the assembly is convenient, the consistency is good, and the production is easy.

[0047] According to the technical solution provided by the present invention, the radiation surface of the PCB radiation board 1 and the vibrator base 7 adopt FRA4 single-sided copper clad plate material, which not only has a lower production cost, but also changes the original double-sided copper clad coupling point into a cross coupling, which can also effectively improve the unit isolation and high gain, and can also ensure the PIM index requirements, with the advantages of small horizontal plane beam width fluctuation, ultra-wideband characteristics, etc., and improve the self-isolation and the system isolation between the two columns. The isolation is increased from the original 26dB to 28dB, the debugging difficulty is significantly improved, and the gain is increased by 0.8-1d compared with the suppressed vibrator, so that in the ultra-wideband narrow spacing multi-frequency antenna array layout, the coupling between the vibrators and the mutual influence can be effectively reduced. At the same time, the newly designed 1727PCB full-wave vibrator unit has a small caliber size, high gain, convenient assembly, good consistency, and easy production. In the ultra-wideband narrow spacing array arrangement, there will be no mutual influence between the two vibrators due to the large caliber.

[0048] All technical features in this embodiment can be freely combined according to actual needs.

[0049] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A full-wave radiation unit, characterized in that: The full-wave radiating unit comprises: A PCB radiation board (1), the PCB radiation board (1) comprising a PCB dielectric substrate (2), a folded vibrator (3) and a microstrip line (4) arranged on the PCB dielectric substrate (2), the PCB dielectric substrate (2) being a single-layer PCB, the folded vibrator (3) and the microstrip line (4) being located on the same plane, and cross coupling being achieved between adjacent microstrip lines (4) and adjacent folded vibrators (3); A coupling feed plate (6) and a vibrator base (7), wherein the PCB radiation plate (1) and the vibrator base (7) are respectively mounted at the upper and lower ends of the coupling feed plate (6); A feed line (5), wherein the feed line (5) is arranged on a coupling feed plate (6), and the PCB radiation plate (1) and the vibrator base (7) are connected to each other via the feed line (5), forming a microstrip transmission line for feeding the PCB radiation plate (1).

2. The full-wave radiation unit according to claim 1, characterized in that: The PCB dielectric substrate (2) is square and has chamfers (201) at four corners. The folded vibrators (3) are in four groups. The four groups of folded vibrators (3) are fixed at four corners of a side of the PCB dielectric substrate (2) away from the coupling feed sheet (6) to form a field-shaped structure. The folded vibrators (3) are located on the inner side of the microstrip line (4).

3. The full-wave radiation unit according to claim 2, characterized in that: The folded vibrator (3) comprises two vibrator arms (301) and two folded vibrators (302); portions of the two vibrator arms (301) close to the middle of the PCB dielectric substrate (2) are connected to each other and form a fixing portion (303); portions of the two vibrator arms (301) far from the middle of the PCB dielectric substrate (2) are separated from each other and then approach and are fixedly connected to the folded vibrator (302).

4. The full-wave radiation unit according to claim 3, characterized in that: The two vibrator arms (301) and the two folded vibrators (302) are symmetrically arranged along the diagonal lines of the PCB dielectric substrate (2).

5. The full-wave radiation unit according to claim 1, characterized in that: The microstrip lines (4) are in four groups, and the four groups of microstrip lines (4) respectively surround the center point of the PCB dielectric substrate (2) and are evenly and symmetrically arranged on the four sides of the PCB dielectric substrate (2) along the horizontal and vertical directions.

6. The full-wave radiation unit according to claim 5, characterized in that: The microstrip line (4) comprises a feed line (401), a first coupling line (402) and a second coupling line (403) arranged at both ends of the feed line (401), and the second coupling line (403) extends to the inside of the adjacent first coupling line (402) to form an S-shaped gap (404).

7. The full-wave radiation unit according to claim 6, characterized in that: The first coupling line (402) comprises a first connecting portion (4022) and a first extending portion (4021) connected to the folded vibrator (302) on one side, a groove (4023) is formed between the first extending portion (4021), the first connecting portion (4022) and the folded vibrator (302), and the second coupling line (403) comprises a second connecting portion (4032) and a second extending portion (4031) connected to the folded vibrator (302) on the other side, and the other end of the second extending portion (4031) is located inside the groove (4023).

8. The full-wave radiation unit according to claim 1, characterized in that: Nylon rivet fixing holes (701) are provided at the four corners of the vibrator base (7), and the vibrator base (7) is made of FRA4 single-sided copper-clad sheet material.

9. The full-wave radiation unit according to claim 8, characterized in that: The coupling feed plate (6) comprises a first feed plate (601) and a second feed plate (602), wherein a feeding point (603) is provided at the bottom ends of the first feed plate (601) and the second feed plate (602) and located on the feed line (5).

10. The full-wave radiation unit according to claim 9, characterized in that: The top ends of the first feed plate (601) and the second feed plate (602) are both fixedly connected to a first fixing block (604); the bottom ends of the first feed plate (601) and the second feed plate (602) are both fixedly connected to a second fixing block (605); a first through hole (202) is provided on the PCB dielectric substrate (2) and is located at the fixing portion (303); the first fixing block (604) is located in the first through hole (202) and is fixedly connected to the PCB dielectric substrate (2); a second through hole (702) is provided on the vibrator base (7); and the second fixing block (605) is located in the second through hole (702) and is fixedly connected to the vibrator base (7).

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