Full-wave radiation unit

Abstract

The utility model discloses a full-wave radiation unit, and aims to solve the technical problems that the gain of the conventional die-casting 1727 oscillator radiation unit is low, and the oscillator processing material is a double-sided copper-clad plate, so that the price is too high, and the market competition is difficult to adapt. 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. According to the utility model, the radiating surface and the oscillator base are made of FRA4 single-sided copper-clad plates, so that not only is the production cost lower, but also the 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 utility model belongs to mobile communication technical field, concretely relates to a full wave radiation unit. BACKGROUND

[0002] With the rapid development of mobile communication technology, multiple systems and multiple modes coexist, and the requirement of base station array antenna is higher and higher, and antenna integration and wideband become the development trend. In the commonly used frequency band of dual polarization directional base station array antenna, the working frequency of DCS network is 1710MHz-1800MHz, the working frequency of PCS is 1850MHz-1990MHz, and the working frequency of UMTS is 1920MHz-2170MHz, and with the development of LTE and TD-LTE, the use of base station antenna not only needs to meet the requirement of wideband, and its radiation performance is also important.

[0003] The existing 1727 oscillator radiation unit has low gain, cannot meet the market demand of high gain antenna, the coupling between each oscillator in the super wide frequency, narrow spacing, multiple frequency antenna array layout is easy to be influenced, the die-casting full wave cannot meet the requirement of 1727 frequency band, and the aperture is also large, meanwhile, the processing material of oscillator uses double-sided copper-clad plate, and the price is too expensive, so it is difficult to adapt to market competition. SUMMARY

[0004] (1) technical problem to be solved

[0005] In view of the defects of the prior art, the purpose of the utility model is to provide a full wave radiation unit, which aims at solving the technical problems that the existing die-casting 1727 oscillator radiation unit has low gain, and the processing material of oscillator uses double-sided copper-clad plate, and the price is too expensive, so it is difficult to adapt to market competition.

[0006] (2) technical scheme

[0007] In order to solve the above technical problems, the utility model provides a kind of full wave radiation unit, which includes PCB radiating plate, PCB radiating plate includes PCB dielectric substrate, folding oscillator and microstrip line arranged on PCB dielectric substrate, PCB dielectric substrate is single-layer PCB and folding oscillator and microstrip line are located in the same plane, and cross coupling is realized between adjacent microstrip line and adjacent folding oscillator;

[0008] Coupling feed piece and oscillator base, PCB radiating plate and oscillator base are respectively installed at the upper and lower ends of coupling feed piece;

[0009] Feed circuit, feed circuit is arranged on coupling feed piece, and PCB radiating plate and oscillator base are connected with each other through feed circuit, and constitute microstrip transmission line for feeding PCB radiating plate.

[0010] Preferably, the PCB medium substrate is square and has chamfers at four corners, and the folded dipoles are four groups, which are fixed at the four corners of the side of the PCB medium substrate away from the coupling feeding sheet and form a cross-shaped structure, and the folded dipoles are located at the inner side of the microstrip line.

[0011] Further, the folded dipole includes two dipole arms and two dipoles, the two dipole arms are connected to each other and formed with a fixing part near the middle part of the PCB medium substrate, and the two dipole arms are separated from each other and then connected to each other and fixed to the dipoles far from the middle part of the PCB medium substrate.

[0012] Further, the two dipole arms and the two dipoles are symmetrically arranged along the diagonal line of the PCB medium substrate.

[0013] Further, the microstrip line is four groups, which are respectively arranged around the center point of the PCB medium substrate and symmetrically arranged on the four sides of the PCB medium substrate along the horizontal and vertical directions.

[0014] Further, the microstrip line includes a feeding line, a first coupling line and a second coupling line arranged at both 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] Further, the first coupling line includes a first connecting part connected to one side of the dipole and a first extension part, a groove is formed between the first connecting part and the dipole, the second coupling line includes a second connecting part connected to the other side of the dipole and a second extension part, and the other end of the second extension part is located in the inside of the groove.

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

[0017] Further, the coupling feeding sheet includes a first feeding sheet and a second feeding sheet, and a feeding point is arranged at the bottom end of the first feeding sheet and the second feeding sheet and located on the feeding line.

[0018] Further, the top end of the first feeding sheet and the second feeding sheet is fixedly connected with a first fixing block, the bottom end of the first feeding sheet and the second feeding sheet is fixedly connected with a second fixing block, a first through hole is arranged on the PCB medium substrate and located at the fixing part, the first fixing block is fixedly connected with the PCB medium substrate in the first through hole, and a second through hole is arranged on the dipole base and the second fixing block is fixedly connected with the dipole base in the second through hole.

[0019] (3) Advantageous effects

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] In the above scheme, the newly designed 1727 PCB full-wave vibrator unit has small aperture size, high gain, convenient assembly, good consistency and easy production, and in the super wide frequency narrow pitch array arrangement, the mutual influence between the two vibrators caused by the large aperture is avoided, and the nylon rivet is used for mounting and fixing the vibrator, which is simple and fast to install.

[0022] In the above scheme, the utility model discloses a FRA4 single-sided copper-clad plate is used for the radiation surface and the vibrator base, not only the production cost is lower, and the original double-sided copper-clad coupling point is changed into cross coupling, and the unit isolation and high gain can be effectively improved, and the PIM index requirement can be guaranteed, the horizontal plane beam width fluctuation is small, the super wide frequency band characteristics and the like are also improved, the self-isolation degree and the system isolation degree between two columns are improved, the isolation degree is improved from the original 26dB to 28dB, the debugging difficulty is obviously improved, and the gain is improved 0.8-1d compared with the suppressed vibrator, so that in the super wide frequency narrow pitch multi-frequency antenna array layout, the coupling between each vibrator and the mutual influence can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an explosion structure schematic diagram of full-wave radiation unit;

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

[0025] Figure 3 It is a top view structure schematic diagram of full-wave radiation unit;

[0026] Figure 4 It is a Figure 3 It is an enlarged structure schematic diagram of A in full-wave radiation unit;

[0027] Figure 5 It is a three-dimensional structure schematic diagram of coupling feed sheet of full-wave radiation unit;

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

[0029] The labels in the attached diagram are as follows: 1. PCB radiating board; 2. PCB dielectric substrate; 3. Folded oscillator; 4. Microstrip line; 5. Feed line; 6. Coupled feed plate; 7. Oscillator base; 201. Chamfer; 202. First through hole; 301. Oscillator arm; 302. Oscillator; 303. Fixing part; 401. Feed line; 402. First coupling line; 403. Second coupling line; 404. S-shaped gap; 4021. First extension; 4022. First connecting part; 4023. Groove; 4031. Second extension; 4032. Second connecting part; 601. First feed plate; 602. Second feed plate; 603. Feed point; 604. First fixing block; 605. Second fixing block; 701. Nylon rivet fixing hole; 702. Second through hole. Detailed Implementation

[0030] This specific embodiment is a full-wave radiation unit, and its structural schematic diagram is as follows: Figures 1-6 As shown, the full-wave radiation unit includes a PCB radiation board 1, which includes a PCB dielectric substrate 2, a folded oscillator 3 and a microstrip line 4 disposed on the PCB dielectric substrate 2. The PCB dielectric substrate 2 is a single-layer PCB and the folded oscillator 3 and the microstrip line 4 are located on the same plane. Adjacent microstrip lines 4 and adjacent folded oscillators 3 are cross-coupled.

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

[0032] Feed line 5 is set on coupling feed plate 6. PCB radiating board 1 and vibrator base 7 are connected to each other through feed line 5 to form a microstrip transmission line for feeding PCB radiating board 1.

[0033] By using FRA4 single-sided copper-clad board for the radiating surface of PCB radiating board 1 and the oscillator base 7, not only is the production cost lower, but the original double-sided copper-clad coupling point is changed to cross coupling, which can also effectively improve unit isolation and high gain, while ensuring PIM index requirements. It has advantages such as small horizontal beamwidth fluctuation and ultra-wide bandwidth characteristics, and improves self-isolation and system isolation between 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 oscillator.

[0034] like Figure 1 and Figure 3As shown, in this embodiment, the PCB substrate 2 is square with chamfered corners 201 at the four corners. There are four sets of folded oscillators 3. The four sets of folded oscillators 3 are fixed at the four corners of the PCB substrate 2 away from the coupling feed plate 6, forming a grid-shaped structure. The folded oscillators 3 are located inside the microstrip line 4. The folded oscillators 3 include two oscillator arms 301 and two oscillators 302. The parts of the two oscillator arms 301 near the middle of the PCB substrate 2 are connected to each other and form a fixing part 303. The parts of the two oscillator arms 301 away from the middle of the PCB substrate 2 are separated from each other and then approached and fixedly connected to the oscillator 302.

[0035] The PCB dielectric substrate 2 is equipped with circuits that participate in the radiation of electromagnetic waves. The PCB dielectric substrate 2 uses FRA4 single-sided copper-clad board to reduce costs. By adjusting the coupling degree and impedance matching between the microstrip line 4 and the folded oscillator 3, the standing wave and isolation performance of the radiation unit can be improved.

[0036] In this embodiment, the two oscillator arms 301 and the two oscillators 302 are symmetrically arranged along the diagonal of the PCB dielectric substrate 2, making the overall appearance more aesthetically pleasing.

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

[0038] This design allows the vibrator arm 301 and vibrator 302 to form a circuit for radiating electromagnetic waves through the first coupling line 402, the second coupling line 403 and the feed line 401, and to form a larger equivalent area for radiating electromagnetic waves through the coupling of the S-shaped gap 404, thereby improving the gain index of the antenna radiating element.

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

[0040] Specifically, the feed line 401 is connected to the first coupling line 402 and the second coupling line 403 at both ends by an arc transition. The first connecting part 4022 and the second connecting part 4032 are both smaller than the width of the vibrator 302. The S-shaped gap 404 is formed by the first connecting part 4022, the first extension part 4021, the second connecting part 4032 and the second extension part 4031 surrounding it.

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

[0042] This reduces the cost of the oscillator base 7, and the oscillator base 7 is installed and fixed with nylon rivets, making installation simple and quick.

[0043] like Figure 1 and Figure 5 As shown, in this embodiment, the coupling feed piece 6 includes a first feed piece 601 and a second feed piece 602. The bottom ends of the first feed piece 601 and the second feed piece 602 are provided with feed points 603 on the feed line 5.

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

[0045] like Figure 1 and Figure 5 As shown, in this embodiment, the top ends of the first feed plate 601 and the second feed plate 602 are both fixedly connected to the first fixing block 604, and the bottom ends of the first feed plate 601 and the second feed plate 602 are both fixedly connected to the second fixing block 605. A first through hole 202 is provided on the PCB dielectric substrate 2 and located at the fixing part 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 radiating board 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, thereby making the assembly convenient, consistent and easy to produce.

[0047] The technical solution provided by this utility model uses FRA4 single-sided copper-clad board for the radiating surface of the PCB radiating board 1 and the vibrator base 7. This not only reduces production costs but also changes the original double-sided copper-clad coupling point to cross coupling, which can effectively improve unit isolation and high gain while ensuring PIM index requirements. It has advantages such as small horizontal beamwidth fluctuation and ultra-wide bandwidth characteristics, and improves self-isolation and system isolation between two columns. The isolation is increased from the original 26dB to 28dB, significantly improving debugging difficulty. The gain is increased by 0.8-1d compared to the suppressed vibrator. Thus, in the layout of ultra-wideband narrow-pitch multi-frequency antenna arrays, it can effectively reduce the coupling and mutual influence between each vibrator. At the same time, the newly designed 1727PCB full-wave vibrator unit has a small aperture size, high gain, convenient assembly, good consistency, and is easy to produce. In the ultra-wideband narrow-pitch array arrangement, the mutual influence between pairs of vibrators will not be caused by the large aperture.

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

[0049] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A full-wave radiation unit, characterized in that: The full-wave radiation unit includes: PCB radiating board (1), the PCB radiating board (1) includes PCB dielectric substrate (2), folded oscillator (3) and microstrip line (4) disposed on PCB dielectric substrate (2), the PCB dielectric substrate (2) is a single layer PCB and the folded oscillator (3) and microstrip line (4) are located on the same plane, and the adjacent microstrip line (4) and the adjacent folded oscillator (3) are cross-coupled; The coupling feed plate (6) and the oscillator base (7) are respectively installed at the upper and lower ends of the coupling feed plate (6); The power supply line (5) is set on the coupling power supply plate (6). The PCB radiating board (1) and the vibrator base (7) are connected to each other through the power supply line (5) to form a microstrip transmission line for powering the PCB radiating board (1). The PCB dielectric substrate (2) is square and has chamfers (201) at the four corners. The folded oscillator (3) consists of four groups. The four groups of folded oscillators (3) are fixed at the four corners of the PCB dielectric substrate (2) away from the coupling feed plate (6) and form a grid-shaped structure. The folded oscillator (3) is located inside the microstrip line (4). The microstrip lines (4) are in four groups. The four groups of microstrip lines (4) are arranged around the center point of the PCB dielectric substrate (2) and are uniformly and symmetrically arranged on the four sides of the PCB dielectric substrate (2) in the horizontal and vertical directions.

2. The full-wave radiation unit according to claim 1, characterized in that, The folding oscillator (3) includes two oscillator arms (301) and two oscillators (302). The portions of the two oscillator arms (301) near the middle of the PCB substrate (2) are connected to each other and form a fixing part (303). The portions of the two oscillator arms (301) away from the middle of the PCB substrate (2) are separated from each other and then approached and fixedly connected to the oscillators (302).

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

4. The full-wave radiation unit according to claim 1, characterized in that, The microstrip line (4) includes a feed line (401) and a first coupling line (402) and a second coupling line (403) disposed at both ends of the feed line (401). The second coupling line (403) extends into the interior of the adjacent first coupling line (402) and forms an S-shaped gap (404).

5. The full-wave radiation unit according to claim 4, characterized in that, The first coupling line (402) includes a first connecting portion (4022) and a first extension portion (4021) connected to one side of the vibrator (302). A groove (4023) is formed between the first extension portion (4021), the first connecting portion (4022), and the vibrator (302). The second coupling line (403) includes a second connecting portion (4032) and a second extension portion (4031) connected to the other side of the vibrator (302). The other end of the second extension portion (4031) is located inside the groove (4023).

6. The full-wave radiation unit according to claim 1, characterized in that, The four corners of the oscillator base (7) are provided with nylon rivet fixing holes (701), and the oscillator base (7) is made of FRA4 single-sided copper-clad board.

7. The full-wave radiation unit according to claim 6, characterized in that, The coupling feed piece (6) includes a first feed piece (601) and a second feed piece (602), and a feed point (603) is opened at the bottom end of the first feed piece (601) and the second feed piece (602) on the feed line (5).

8. The full-wave radiation unit according to claim 7, characterized in that, The top ends of the first feed plate (601) and the second feed plate (602) are fixedly connected to a first fixing block (604), and the bottom ends of the first feed plate (601) and the second feed plate (602) are fixedly connected to a second fixing block (605). A first through hole (202) is opened on the PCB substrate (2) and located at the fixing part (303). The first fixing block (604) is located in the first through hole (202) and fixedly connected to the PCB substrate (2). A second through hole (702) is opened on the oscillator base (7). The second fixing block (605) is located in the second through hole (702) and fixedly connected to the oscillator base (7).

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