CN117748103A - Broadband wave-transparent low-frequency oscillator and common-caliber antenna - Google Patents
Broadband wave-transparent low-frequency oscillator and common-caliber antenna Download PDFInfo
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- 238000005452 bending Methods 0.000 claims description 8
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- 238000004519 manufacturing process Methods 0.000 description 7
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- ZHBBDTRJIVXKEX-UHFFFAOYSA-N 1-chloro-2-(3-chlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C(=CC=CC=2)Cl)=C1 ZHBBDTRJIVXKEX-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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Abstract
The invention relates to a broadband wave-transparent low-frequency oscillator, which comprises a first polarized oscillator, a second polarized oscillator and a feed unit; the first polarized vibrator comprises 2 first vibrator arms; the second polarized vibrator comprises 2 second vibrator arms; the first vibrator arm and the second vibrator arm are of annular structures with the annular width of 1 mm; the 2 first vibrator arms are all positioned on a first reference plane, and the 2 second vibrator arms are all positioned on a second reference plane; the projection of one first oscillator arm of the first polarized oscillator on the second reference plane is partially overlapped with the 2 second oscillator arms of the second polarized oscillator, and the projection of the other first oscillator arm of the first polarized oscillator on the second reference plane is also partially overlapped with the 2 second oscillator arms of the second polarized oscillator, so that a plurality of low-frequency couplers are formed between the first oscillator arms and the second oscillator arms. The broadband wave-transmitting low-frequency oscillator has the characteristics of good wave-transmitting performance, wide impedance bandwidth and the like. The invention also relates to a common-caliber antenna.
Description
Technical Field
The invention relates to the technical field of communication equipment, in particular to a broadband wave-transparent low-frequency oscillator and a common-caliber antenna.
Background
With the development of mobile communication, the frequency range of electromagnetic waves used is wider and wider, which causes more and more frequency bands of the mobile communication antenna, and in order to reduce the size of the antenna, the vibrators of a plurality of frequency bands are often required to be mutually nested, namely, the common caliber.
In the common aperture antenna, the presence of the low frequency element affects the performance of the high frequency element, and distorts the pattern of the high frequency element. The traditional wave-transmitting vibrator is generally cross-shaped, and the wave-transmitting vibrator has better wave-transmitting performance, but has the problem that the bandwidth of impedance is relatively narrow when working in a low-frequency band, and the bandwidth of the lower high-frequency vibrator is limited due to the limited wave-transmitting bandwidth. In addition, there are also some low-frequency vibrators such as the technical scheme described in chinese patent application No. CN2020108644680, entitled "a miniaturized low-frequency vibrator unit and antenna array", and the vibrator arm structure of such low-frequency vibrator is relatively complex, and the production cost is relatively high.
Disclosure of Invention
The invention aims to provide a broadband wave-transmitting low-frequency oscillator, which has the advantages of simple structure, reasonable design, small volume, low production cost, better wave-transmitting performance, wider impedance bandwidth and the like.
The technical scheme of the broadband wave-transparent low-frequency vibrator is realized as follows: a broadband wave-transparent low-frequency oscillator comprises a first polarized oscillator, a second polarized oscillator and a feed unit; the first polarized vibrator comprises 2 first vibrator arms; the second polarized oscillator comprises 2 second oscillator arms; the first polarized vibrator and the second polarized vibrator are placed in a crossed mode; the first polarized vibrator and the second polarized vibrator are fed through the feeding unit; in particular, the first vibrator arm and the second vibrator arm are both annular structures, the annular width of the annular structures is in the range of 0.1 mm-8 mm, and the annular width of the annular structures is optimal in the range of 0.1 mm-2 mm; the 2 first vibrator arms are all positioned on a first reference plane, the 2 second vibrator arms are all positioned on a second reference plane, and the first reference plane is parallel to but not coplanar with the second reference plane; the projection of one first oscillator arm of the first polarized oscillator on the second reference plane is partially overlapped with the 2 second oscillator arms of the second polarized oscillator, and the projection of the other first oscillator arm of the first polarized oscillator on the second reference plane is also partially overlapped with the 2 second oscillator arms of the second polarized oscillator, so that a plurality of low-frequency couplers are formed between the first oscillator arms and the second oscillator arms.
According to the scheme, the first oscillator arm of the first polarized oscillator and the second oscillator arm of the second polarized oscillator are designed to be of annular structures, and the annular widths of the first oscillator arm and the second oscillator arm are narrow, so that the first oscillator arm and the second oscillator arm have larger inductance to inhibit high-frequency current, and the high-frequency current is mutually reversed when the scheme is applied, so that a wave-transmitting effect is achieved; the first oscillator arm of the first polarized oscillator and the second oscillator arm of the second polarized oscillator are positioned on different 2 reference planes, the first oscillator arm and the second oscillator arm can be closer by the structure, the size of the scheme is smaller, and a low-frequency coupler is further formed between the first oscillator arm and each second oscillator arm to feed power, so that when the scheme is applied, only low-frequency current can pass through, when the scheme works together with the high-frequency oscillator, the scheme does not generate high-frequency current under ideal conditions, the performance of the high-frequency oscillator is not influenced during working, the scheme has better broadband impedance matching, and the structure is very simple, thereby being beneficial to reducing the production cost.
Further, the low-frequency coupler comprises a first low-frequency coupling part formed by bending on the first oscillator arm and a second low-frequency coupling part formed by bending on the second oscillator arm; the projection of the first low-frequency coupling part belonging to the same low-frequency coupler on the second reference plane overlaps the second low-frequency coupling part, so that the first low-frequency coupling part and the second low-frequency coupling part couple the feed.
Further, the first vibrator arm and the second vibrator arm are also bent to form a high-frequency current suppressing part.
Further, each of the first and second arms is bent inward or outward to form the high-frequency current suppressing portion.
Further, the scheme also comprises a PCB board; one surface of the PCB is the first reference plane, and the other surface of the PCB is the second reference plane.
Further, the annular structures of the first vibrator arm and the second vibrator arm are square.
Further, the distance between each adjacent 2 angular positions on the first transducer arm and the second transducer arm is preferably in the range of 52mm to 56 mm.
The broadband wave-transmitting low-frequency vibrator has the beneficial effects that: the device has the advantages of simple structure, reasonable design, small volume, low production cost, good wave transmission performance, wide impedance bandwidth and the like.
The invention also provides a common-caliber antenna which has the advantages of simple structure, reasonable design, no pattern distortion of the high-frequency oscillator caused by the low-frequency oscillator, and the like.
The technical scheme of the common aperture antenna is realized as follows: a common aperture antenna comprises a reflecting plate; the reflection surface of the reflection plate is provided with 1 low-frequency oscillator and a high-frequency oscillator array; the high-frequency oscillator array comprises a plurality of high-frequency oscillators distributed in a rectangular array; the low-frequency oscillator is positioned at the center of the high-frequency oscillator array, and the height of the low-frequency oscillator is larger than that of the high-frequency oscillator; in particular, the low-frequency oscillator is a broadband wave-transparent low-frequency oscillator according to the scheme.
The common-caliber antenna has the beneficial effects that: the common-caliber antenna has the advantages of simple structure, reasonable design, no pattern distortion of the high-frequency oscillator caused by the low-frequency oscillator by adopting the low-frequency oscillator of the former scheme, and the like.
Drawings
Fig. 1 is a schematic perspective view of embodiment 1.
Fig. 2 is a schematic diagram of the front view structure of embodiment 1.
Fig. 3 is a schematic rear view of embodiment 1.
Fig. 4 is a schematic structural diagram of fig. 2 with the PCB board and the feeding unit removed.
Fig. 5 is a schematic structural diagram of embodiment 2.
Fig. 6 is a horizontal pattern of the high frequency oscillator in the simulation test of example 2.
Fig. 7 is a voltage standing wave ratio diagram of the low frequency oscillator in the simulation test of embodiment 2.
Reference numerals illustrate: 1-a first polarized vibrator; 11-a first vibrator arm; 2-a second polarized vibrator; 21-a second vibrator arm; a 3-feed unit; 4-a low frequency coupler; 41-a first low frequency coupling; 42-a second low frequency coupling; 5-a high-frequency current suppressing part; 51-first section; 52-a second section; 53-third stage; 6-a PCB board; 7-reflecting plates; 8-a low frequency vibrator; 9-high frequency vibrator.
Detailed Description
Example 1
As shown in fig. 1, 2, 3 and 4, the present embodiment is a broadband wave-transparent low-frequency oscillator, including a first polarized oscillator 1, a second polarized oscillator 2 and a feeding unit 3; the first polarized vibrator 1 comprises 2 first vibrator arms 11; the second polarized vibrator 2 includes 2 second vibrator arms 21; the first polarized vibrator 1 and the second polarized vibrator 2 are placed in a crossed mode; the first polarized vibrator 1 and the second polarized vibrator 2 are fed through the feeding unit 3; the first vibrator arm 11 and the second vibrator arm 21 are of annular structures, the annular width D of the annular structures is 1mm, the annular structures of the first vibrator arm 11 and the second vibrator arm 21 are square, the spacing L between every two adjacent 2 angular positions on the first vibrator arm 11 and the second vibrator arm 21 is 54mm, and the shape and the size are set so that the working frequency band of the broadband wave-transmitting low-frequency vibrator is 698-960MHz; the first vibrator arm 11 and the second vibrator arm 21 are each formed with a feeding region at one corner of the first vibrator arm and the second vibrator arm, which are connected to the feeding unit 3 in a feeding manner; the 2 first vibrator arms 11 are all positioned on a first reference plane, the 2 second vibrator arms 21 are all positioned on a second reference plane, and the first reference plane is parallel to the second reference plane but not coplanar with the second reference plane; as shown in fig. 4, the projection of one first dipole arm 11 of the first dipole 1 on the second reference plane overlaps with each of the 2 second dipole arms 21 of the second dipole 2, and the projection of the other first dipole arm 11 of the first dipole 1 on the second reference plane overlaps with each of the 2 second dipole arms 21 of the second dipole 2, whereby a plurality of low-frequency couplers 4 are formed between the first and second dipole arms 11 and 21. The design is that the first vibrator arm 11 and the second vibrator arm 21 have larger inductance to restrain high-frequency current, so that the high-frequency current of the broadband wave-transmitting low-frequency vibrator is opposite to each other when the broadband wave-transmitting low-frequency vibrator is applied, and wave-transmitting effect is achieved; the first oscillator arm 11 of the first polarized oscillator 1 and the second oscillator arm 21 of the second polarized oscillator 2 are positioned on different 2 reference planes, the structure enables the first oscillator arm 11 and the second oscillator arm 21 to be closer, the volume of the broadband wave-transmitting low-frequency oscillator is smaller, the low-frequency coupler 4 is further formed between the first oscillator arm 11 and each second oscillator arm 21 to feed, so that only low-frequency current can pass through the broadband wave-transmitting low-frequency oscillator when the broadband wave-transmitting low-frequency oscillator and the high-frequency oscillator work together, high-frequency current cannot be generated by the broadband wave-transmitting low-frequency oscillator under ideal conditions, the performance of the high-frequency oscillator cannot be affected during work, the structure enables the broadband wave-transmitting low-frequency oscillator to have better broadband impedance matching, and the structure is quite simple and is beneficial to reducing production cost.
In order to make the structure of the broadband wave-transparent low-frequency oscillator more reasonable, as shown in fig. 1, 2, 3 and 4, the low-frequency coupler 4 includes a first low-frequency coupling portion 41 formed by bending on the first oscillator arm 11 and a second low-frequency coupling portion 42 formed by bending on the second oscillator arm 21; the first low-frequency coupling portion 41 is protruded to the outside of the first vibrator arm 11, and the second low-frequency coupling portion 42 is protruded to the outside of the second vibrator arm 21; the lengths of the first low-frequency coupling part 41 and the second low-frequency coupling part 42 are one fourth of the operating wavelength of the broadband wave-transparent low-frequency oscillator, and the projection of the first low-frequency coupling part 41 belonging to the same low-frequency coupler 4 on the second reference plane is overlapped with the second low-frequency coupling part 42, so that the first low-frequency coupling part 41 and the second low-frequency coupling part 42 are coupled for feeding.
In order to provide the broadband wave-transparent low-frequency oscillator with a better high-frequency induced current suppression capability, the first and second oscillator arms 11, 21 are further bent to form a high-frequency current suppression portion 5 as shown in fig. 1, 2, 3, and 4. Each of the first and second arms 11, 21 is bent outward to form the high-frequency current suppressing portion 5. The high-frequency current suppressing parts 5 on the first vibrator arm 11 and the second vibrator arm 21 are formed by sequentially connecting a first section 51, a second section 52 and a third section 53, the lengths of the first section 51 and the third section 53 are 5mm, and the length of the second section 52 is 19mm. In the microwave circuit, the inductance can be increased by folding the thinner circuit several times, so that the high-frequency induction current can be effectively restrained. In practical application, the number, bending times and bending direction of the high-frequency current suppressing parts 5 on the first and second vibrator arms 11, 21 are set according to the high-frequency to be transmitted.
In order to facilitate production and improve production efficiency, as shown in fig. 1, 2 and 3, the broadband wave-transmitting low-frequency vibrator further comprises a PCB 6; one surface of the PCB 6 is the first reference plane, the other surface of the PCB 6 is the second reference plane, and the first vibrator arm 11 and the second vibrator arm 21 are both formed by copper coating on the PCB 6.
Example 2
As shown in fig. 5, the present embodiment is a common aperture antenna including a reflecting plate 7; the reflection surface of the reflection plate 7 is provided with 1 low-frequency vibrator 8 and a high-frequency vibrator array; the high-frequency oscillator array comprises 16 high-frequency oscillators 9 distributed in a rectangular array, and the working frequency band of the high-frequency oscillators 9 is 3300-4200MHz frequency band; the low-frequency oscillator 8 is positioned at the center of the high-frequency oscillator array, and the height of the low-frequency oscillator 8 is larger than that of the high-frequency oscillator 9; the low frequency oscillator 8 is a broadband wave-transparent low frequency oscillator 8 described in embodiment 1. In the simulation test of the embodiment, fig. 6 shows that the directional diagram of the high-frequency oscillator 9 of the embodiment is not distorted, and the beam width convergence condition is good, so that the low-frequency oscillator of the embodiment 1 has a good wave-transmitting effect on the high-frequency oscillator 9 with the working frequency band of 3300-4200MHz, and the working of the high-frequency oscillator 9 is not affected. As shown in fig. 7, the voltage standing wave ratio of the low-frequency oscillator 8 fluctuates slightly and only between 1.14 and 1.42 during the simulation test, so that the low-frequency oscillator 8 has better broadband impedance matching.
Claims (8)
1. A broadband wave-transparent low-frequency oscillator comprises a first polarized oscillator, a second polarized oscillator and a feed unit; the first polarized vibrator comprises 2 first vibrator arms; the second polarized oscillator comprises 2 second oscillator arms; the first polarized vibrator and the second polarized vibrator are placed in a crossed mode; the first polarized vibrator and the second polarized vibrator are fed through the feeding unit; the method is characterized in that: the first vibrator arm and the second vibrator arm are of annular structures, and the annular width of the annular structures is in the range of 0.1 mm-8 mm; the 2 first vibrator arms are all positioned on a first reference plane, the 2 second vibrator arms are all positioned on a second reference plane, and the first reference plane is parallel to but not coplanar with the second reference plane; the projection of one first oscillator arm of the first polarized oscillator on the second reference plane is partially overlapped with the 2 second oscillator arms of the second polarized oscillator, and the projection of the other first oscillator arm of the first polarized oscillator on the second reference plane is also partially overlapped with the 2 second oscillator arms of the second polarized oscillator, so that a plurality of low-frequency couplers are formed between the first oscillator arms and the second oscillator arms.
2. The broadband wave-transparent low-frequency oscillator according to claim 1, wherein: the low-frequency coupler comprises a first low-frequency coupling part formed by bending on a first oscillator arm and a second low-frequency coupling part formed by bending on a second oscillator arm; the projection of the first low-frequency coupling part belonging to the same low-frequency coupler on the second reference plane overlaps the second low-frequency coupling part, so that the first low-frequency coupling part and the second low-frequency coupling part couple the feed.
3. The broadband wave-transparent low-frequency oscillator according to claim 1, wherein: the first vibrator arm and the second vibrator arm are also bent to form a high-frequency current-suppressing part.
4. A broadband wave-transparent low frequency oscillator according to claim 3, characterized in that: each of the first vibrator arm and the second vibrator arm is bent to the inside or the outside of the vibrator arm to form the high-frequency current suppressing part.
5. The broadband wave-transparent low-frequency oscillator according to claim 1, wherein: the PCB is also included; one surface of the PCB is the first reference plane, and the other surface of the PCB is the second reference plane.
6. The broadband wave-transparent low-frequency oscillator according to claim 1, wherein: the annular structures of the first vibrator arm and the second vibrator arm are square.
7. The broadband wave-transparent low-frequency oscillator according to claim 6, wherein: the distance between every two adjacent 2 angular positions on the first vibrator arm and the second vibrator arm is in the range of 52 mm-56 mm.
8. A common aperture antenna comprises a reflecting plate; the reflection surface of the reflection plate is provided with 1 low-frequency oscillator and a high-frequency oscillator array; the high-frequency oscillator array comprises a plurality of high-frequency oscillators distributed in a rectangular array; the low-frequency oscillator is positioned at the center of the high-frequency oscillator array, and the height of the low-frequency oscillator is larger than that of the high-frequency oscillator; the method is characterized in that: the low frequency oscillator is a broadband wave-transparent low frequency oscillator according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311815736.XA CN117748103A (en) | 2023-12-27 | 2023-12-27 | Broadband wave-transparent low-frequency oscillator and common-caliber antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311815736.XA CN117748103A (en) | 2023-12-27 | 2023-12-27 | Broadband wave-transparent low-frequency oscillator and common-caliber antenna |
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| CN117748103A true CN117748103A (en) | 2024-03-22 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800968A (en) * | 2012-08-06 | 2012-11-28 | 厦门大学 | Nested composite ring microstrip multi-frequency antenna for Beidou navigation system |
| CN109687135A (en) * | 2019-01-16 | 2019-04-26 | 重庆邮电大学 | A kind of wideband dual polarized base station antenna unit suitable for 4G/5G mobile communication |
| CN109904585A (en) * | 2019-03-29 | 2019-06-18 | 摩比科技（深圳）有限公司 | Dual-polarization radiating unit and antenna for base station |
| CN110890617A (en) * | 2019-12-06 | 2020-03-17 | 广东盛路通信科技股份有限公司 | PCB oscillator bandwidth improving method, PCB oscillator and base station antenna radiation unit |
| CN111864367A (en) * | 2020-07-27 | 2020-10-30 | 摩比天线技术（深圳）有限公司 | Low-frequency radiation unit and base station antenna |
| CN114361779A (en) * | 2021-12-30 | 2022-04-15 | 华南理工大学 | Antenna device and low-frequency wave-transparent oscillator |
| CN116885428A (en) * | 2023-08-21 | 2023-10-13 | 京信通信技术(广州)有限公司 | Decoupling radiation unit and multi-frequency common-caliber antenna |
-
2023
- 2023-12-27 CN CN202311815736.XA patent/CN117748103A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800968A (en) * | 2012-08-06 | 2012-11-28 | 厦门大学 | Nested composite ring microstrip multi-frequency antenna for Beidou navigation system |
| CN109687135A (en) * | 2019-01-16 | 2019-04-26 | 重庆邮电大学 | A kind of wideband dual polarized base station antenna unit suitable for 4G/5G mobile communication |
| CN109904585A (en) * | 2019-03-29 | 2019-06-18 | 摩比科技（深圳）有限公司 | Dual-polarization radiating unit and antenna for base station |
| CN110890617A (en) * | 2019-12-06 | 2020-03-17 | 广东盛路通信科技股份有限公司 | PCB oscillator bandwidth improving method, PCB oscillator and base station antenna radiation unit |
| CN111864367A (en) * | 2020-07-27 | 2020-10-30 | 摩比天线技术（深圳）有限公司 | Low-frequency radiation unit and base station antenna |
| CN114361779A (en) * | 2021-12-30 | 2022-04-15 | 华南理工大学 | Antenna device and low-frequency wave-transparent oscillator |
| CN116885428A (en) * | 2023-08-21 | 2023-10-13 | 京信通信技术(广州)有限公司 | Decoupling radiation unit and multi-frequency common-caliber antenna |
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