CN209843947U - Double-frequency high-gain intelligent gateway antenna - Google Patents
Double-frequency high-gain intelligent gateway antenna Download PDFInfo
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- CN209843947U CN209843947U CN201920829574.8U CN201920829574U CN209843947U CN 209843947 U CN209843947 U CN 209843947U CN 201920829574 U CN201920829574 U CN 201920829574U CN 209843947 U CN209843947 U CN 209843947U
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- 239000000463 material Substances 0.000 claims abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model relates to a dual-frenquency high-gain intelligent gateway antenna, the antenna includes two external antennas and connects the feed circuit board of two external antennas respectively, and one of them is 2.4GHZ external antenna, and another is 5.8GHZ external antenna, the feed circuit board is positive and negative two-sided printed circuit, two external antennas respectively through a coaxial feeder with the front of feed circuit board and the printed circuit connection of reverse side; the 2.4GHZ external antenna adopts a J-shaped microstrip structure, and the 5.8HZ external antenna adopts a coplanar waveguide shunt-fed dipole antenna array structure. The utility model has the advantages of easy processing, small low section, good omnidirectional performance, high gain, etc. The utility model discloses not only overcome general antenna gain low, the difficult defect of miniaturized dual-frenquency work, simplified external antenna figure moreover four and become two, practiced thrift antenna material cost, be fit for extensively using widely more.
Description
Technical Field
The utility model relates to the technical field of antennas, in particular to dual-frenquency high-gain intelligent gateway antenna.
Background
The intelligent gateway product is used as an access point for switching home fiber to wireless network coverage, is a bidirectional transmission radio device, the output power of the household wireless network product is generally not more than 20dBm, and in order to achieve the effects of large-range indoor coverage and wall penetration, a high-performance dual-frequency miniaturized antenna needs to be selected to be matched with a complete machine to achieve the effects of high uplink and downlink throughput.
In a wireless network system, the farther the distance, the weaker the signal, and therefore the signal strength restricts the wireless network coverage distance. The network coverage distance is generally the method of adding power amplifier, reducing noise amplifier and improving antenna gain at present, the antenna is used as the basic component of the radio system, it provides means for radiating and receiving radio wave, the performance is good and bad, the throughput effect of signal transmission and reception is directly influenced, and it has very important meaning for the development and application of intelligent gateway.
The existing dual-frequency intelligent gateway generally has four external antennas, two each of the 2.4GHz and 5.8GHz antennas, and respectively realizes the MIMO technology of two-transmitting and two-receiving. However, in some application scenarios, in order to achieve product beauty, only two external antennas can be provided, each external antenna will work at double frequency of 2.4GHz and 5.8GHz, and two radio frequency outlets are provided. The antenna technology used at present has many defects, one is that the antenna gain is not high enough, generally 2dBi, or the gain is high, but the directional diagram is out of roundness, and the double-frequency work can not be perfectly realized; the two antennas are not compact in structure, and are not easy to be assembled into the existing antenna shell due to overlarge size.
Therefore, how to achieve dual-band operation and miniaturization of the antenna while considering other performance indexes of the antenna, such as efficiency, gain, bandwidth, isolation, etc., becomes a difficult point of current research.
SUMMERY OF THE UTILITY MODEL
Therefore, a need exists for a dual-frequency high-gain intelligent gateway antenna, which overcomes the disadvantages of low gain and difficulty in miniaturization of dual-frequency operation of the conventional antenna.
In order to achieve the above purpose, the present invention adopts the following technical solutions.
The utility model provides a dual-frenquency high-gain intelligent gateway antenna, the antenna includes two external antennas and connects the feed circuit board of two external antennas respectively, and one of them is 2.4GHZ external antenna, and another is 5.8GHZ external antenna, the feed circuit board is positive and negative two-sided printed circuit, two external antennas respectively through a coaxial feeder with the front of feed circuit board and the printed circuit connection of reverse side; the 2.4GHZ external antenna adopts a J-shaped microstrip structure, and the 5.8HZ external antenna adopts a coplanar waveguide shunt-fed dipole antenna array structure.
Preferably, the two external antennas are provided with antenna shells, the coaxial feeder lines are led out from the lower ends of the antenna shells, the printed circuits on the front and back surfaces of the feed circuit board are respectively led out of a radio frequency seat, and the two coaxial feeder lines are connected with the two radio frequency seats in a one-to-one correspondence manner.
Preferably, the dielectric plate of the feed circuit board is made of polytetrafluoroethylene plate, Rogers or FR-4 insulating plate and the like.
Preferably, the total length of the 2.4GHZ external antenna is 3/4 wavelengths, wherein 1/4 wavelengths from top to bottom are matching sections, and the rest are radiating sections.
Preferably, the feed point of the 2.4GHZ external antenna is located at a position where the impedance of the J-shaped microstrip is 50 Ω.
Preferably, the dipole of the 5.8GHZ external antenna is provided with two arms and two identical array elements, the two array elements are arranged on a straight line, and the distance between the two array elements is:
d≈60-80*λ0；
wherein λ is0C/f is the free space wavelength at the current frequency.
Preferably, the distance between the two array elements is d equal to 32.5 mm.
Preferably, the feed point of the 5.8GHZ external antenna is located near the position of the two array elements which is offset downward 1/4 wavelengths from the center.
Preferably, the printed circuit on the 5.8GHz antenna feed circuit board is a coplanar waveguide, a strip line or a microstrip line.
Preferably, the antenna housing is flat and has a length, width and height dimension of 93mm 12mm 0.6 mm.
The utility model discloses a set up the feed circuit board into positive and negative two-sided printed circuit, make two external antenna respectively through a coaxial feeder with the front of feed circuit board and the printed circuit of reverse side are connected, simultaneously, 2.4GHZ external antenna adopts J shape microstrip structure, the dipole antenna array structure that 5.8HZ external antenna adopted coplane waveguide and presented makes the antenna have advantages such as easy processing, the miniaturization of low section, omnidirectional performance is good, high gain. The utility model discloses not only overcome general antenna gain low, the difficult defect of miniaturized dual-frenquency work, simplified external antenna figure moreover four and become two, practiced thrift antenna material cost, be fit for extensively using widely more.
Drawings
Fig. 1 is a schematic structural diagram of a dual-frequency high-gain intelligent gateway in this embodiment;
fig. 2 is a schematic structural diagram of a 2.4GHZ external antenna in the dual-frequency high-gain intelligent gateway in this embodiment;
fig. 3 is a central frequency point E plane directional diagram of the 2.4GHz antenna in this embodiment;
fig. 4 is a schematic structural diagram of a 5.8GHZ external antenna in the dual-frequency high-gain intelligent gateway in this embodiment;
fig. 5 is a central frequency point E plane pattern of the 5.8GHz antenna in this embodiment.
Detailed Description
The following further description is made with reference to the drawings and specific embodiments.
Referring to fig. 1, the present embodiment provides a dual-band high-gain intelligent gateway antenna, which includes two external antennas, one external antenna with an operating frequency band of 2.4GHZ, and the other external antenna with an operating frequency band of 5.8GHZ, and respectively implements the function of receiving and transmitting signals with respective frequencies. The gateway antenna further comprises a feed circuit board 10, wherein the feed circuit board 10 comprises front and back printed circuits 11 and 12, the front printed circuit 11 is connected with the external antenna at 2.4GHZ, and the back printed circuit 12 is connected with the external antenna at 5.8GHZ, and the front printed circuit and the back printed circuit respectively work without mutual interference. Similar to the currently used antenna, the two external antennas are connected to the printed circuits 11 and 12 on the front and back sides of the feed circuit board 10 by a coaxial feed line, respectively. Meanwhile, the two external antennas are provided with antenna shells, the coaxial feeders are led out from the lower ends of the antenna shells, the printed circuits 11 and 12 on the front and back surfaces of the feed circuit board 10 are respectively led out of a radio frequency seat (not shown), and the two coaxial feeders are correspondingly connected with the two radio frequency seats one by one. The external antenna is located a distance from the circuit board 10 to avoid the structure from affecting the performance of the antenna.
The 2.4GHZ external antenna of this embodiment adopts a J-shaped microstrip structure, and the 5.8HZ external antenna adopts a coplanar waveguide shunt-fed dipole antenna array structure. Because the relative bandwidths of the 2.4GHz and 5.8GHz antennas are different, the working frequency band of the 5.8GHz antenna is 5.1GHz-5.9GHz, and the frequency band is wider, the 2.4GHz antenna adopts a J-shaped antenna structure, and the 5.8GHz antenna adopts a dipole antenna array with coplanar waveguide parallel feeding. Aiming at a WIFI communication system, the two external antennas respectively realize 360-degree spatial coverage of respective frequency bands in the horizontal direction.
As shown in fig. 2, the 2.4GHz external antenna 100 adopts a J-shaped printed microstrip 101, which has the advantages of simple structure, easy manufacture, small size, low cost, and high efficiency, but has the disadvantages of narrow bandwidth and poor welding of a radio frequency line at a feeding point, so that the total length of the 2.4GHz external antenna 100 is set to 3/4 wavelengths, where a 1/4 wavelength from top to bottom is a matching segment and the rest is a radiation segment. This matching method is the simplest and most effective matching method for 1/2-wavelength high-impedance antennas. The theoretical position of the J-shaped antenna feeding point 102 is at 1/8 wavelengths of the antenna, and the antenna is greatly influenced by the environment, and the feeding point 102 is located at different positions when the antenna is manufactured in different sizes and under different environments.
Looking down at the opening of the matching section, the opening is high-impedance and is well suitable for matching with an antenna with 1/2 wavelengths, gradually downwards, the impedance is gradually lowered, and the impedance is zero at the position of a short circuit, which is a gradual process, the pure impedance of one place is always 50 omega, and the best matching point is tested and is the place with the best efficiency. Therefore, the feeding point 102 of the present embodiment is disposed in the vicinity of this position. By optimizing and adjusting the position of the feed point 102, the standing wave can be made to be less than 1.2 at 2.45 GHz.
When the operating frequency of the 2.4GHZ external antenna 100 is 2.4GHZ to 2.5GHZ, the central frequency point is 2.45GHZ, the gain value in the horizontal direction reaches 3.5dBi, and the direction of the E-plane adopts vertical polarization (as shown in fig. 3).
Referring to fig. 4, the dipole of the 5.8GHZ external antenna 200 of the present embodiment is provided with two arms 201 and two identical array elements 202, where the two array elements 202 are arranged on a straight line and the distance between the two array elements is set as:
d≈60-80*λ0；
wherein λ is0C/f, free space wavelength at the current frequency.
Preferably, the present embodiment selects d-32.5 mm as the spacing value between two array elements 202.
The dipole adopts a common printed dipole, two arms 201 of the dipole are printed on the same surface of the dielectric plate, the two arms 201 of the dipole are wider, the antenna unit covers a frequency band of 5.1-5.9GHz, and then 2 identical array elements 202 are arranged on a straight line to form a uniform linear array. The coplanar waveguide is adopted to feed 2 antenna array elements 202, a feeding point 203 is downwards deviated near the position of 90-degree electrical length (namely 1/4 wavelength) of central frequency at the distance center of the 2 antenna array elements 202, so that the parallel feeder realizes 180-degree reverse feeding on the 2 array elements 202 at the central frequency, due to the coplanar waveguide feeding, two arms of one dipole unit in the 2 array elements 202 are staggered by 180 degrees and are just added up to 360 degrees, the feeding phases of the antenna array elements are the same, the current amplitudes are basically equal, and the high-gain directional diagram coverage is realized.
When the operating frequency of the 5.8GHZ external antenna 200 is 5.1GHZ to 5.9GHZ, the central frequency point is 5.5GHZ, the gain value in the horizontal direction reaches 3.5dBi, and the direction of the E-plane also adopts vertical polarization (as shown in fig. 5).
The printed circuit on the feed circuit board of the 5.8GHz external antenna 200 is a coplanar waveguide, a strip line or a microstrip line, and is easy to process.
In this embodiment, the dielectric plate of the feeding circuit board is made of a low-loss insulating dielectric material, including but not limited to teflon plate, rocky or FR-4 insulating plate, and the like.
In order to make the product more integrated, the dual-frequency high-gain intelligent gateway antenna is made into a conformal antenna in the embodiment, that is, the antenna and the plastic shell of the intelligent gateway are conformal, 360-degree full coverage in the vertical polarization horizontal direction is realized, the antenna shell is set to be flat, the length, the width and the height of the antenna shell are limited to 93mm x 12mm x 0.6mm, and after the antenna is conformal with the plastic shell, the production cost can be reduced.
To sum up, the utility model discloses a set up the feed circuit board into two-sided printed circuit, make two external antenna respectively through a coaxial feeder with the front of feed circuit board and the printed circuit of reverse side are connected, simultaneously, 2.4GHZ external antenna adopts J shape microstrip structure, 5.8HZ external antenna adopts coplanar waveguide and the dipole antenna array structure who presents, makes the antenna have advantages such as easy processing, low section miniaturization, omnidirectional performance are good, high gain. The utility model discloses not only overcome general antenna gain low, the difficult defect of miniaturized dual-frenquency work, simplified external antenna figure moreover four and become two, practiced thrift antenna material cost, be fit for extensively using widely more.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. The utility model provides a dual-frenquency high gain intelligent gateway antenna, the antenna includes two external antennas and connects respectively two external antennas's feeder circuit board, one of them is 2.4GHZ external antenna, and another is 5.8GHZ external antenna, its characterized in that: the feed circuit board is a printed circuit with a front surface and a back surface, and the two external antennas are respectively connected with the printed circuits on the front surface and the back surface of the feed circuit board through a coaxial feeder; the 2.4GHZ external antenna adopts a J-shaped microstrip structure, and the 5.8GHZ external antenna adopts a coplanar waveguide shunt-fed dipole antenna array structure.
2. The dual-band high-gain smart gateway antenna of claim 1, wherein: the two external antennas are provided with antenna shells, the coaxial feeders are led out from the lower ends of the antenna shells, the printed circuits on the front side and the back side of the feed circuit board are respectively led out of a radio frequency seat, and the two coaxial feeders are connected with the two radio frequency seats in a one-to-one correspondence mode.
3. The dual-band high-gain smart gateway antenna of claim 1, wherein: the medium plate of the feed circuit board is made of polytetrafluoroethylene plate, Rogers or FR-4 insulating plate and other materials.
4. The dual-band high-gain smart gateway antenna of claim 1, wherein: the total length of the 2.4GHZ external antenna is 3/4 wavelengths, wherein 1/4 wavelengths from top to bottom are matched sections, and the rest are radiating sections.
5. The dual-band high-gain smart gateway antenna of claim 4, wherein: and the feed point of the 2.4GHZ external antenna is positioned at the position of the J-shaped microstrip with the impedance of 50 omega.
6. The dual-band high-gain smart gateway antenna of claim 1, wherein: the dipole of the 5.8GHZ external antenna is provided with two arms and two same array elements, the two array elements are arranged on a straight line, and the distance between the two array elements is as follows:
d≈60-80*λ0；
wherein λ is0C/f is the free space wavelength at the current frequency.
7. The dual-band high-gain smart gateway antenna of claim 6, wherein: the distance between the two array elements is d equal to 32.5 mm.
8. The dual-band high-gain smart gateway antenna of claim 6 or 7, wherein: the feed point of the 5.8GHZ external antenna is positioned near the position of the two array elements which is offset downwards 1/4 wavelengths from the center.
9. The dual-band high-gain smart gateway antenna of claim 8, wherein: and the printed circuit on the feed circuit board connected with the 5.8GHz external antenna is a coplanar waveguide, a strip line or a microstrip line.
10. The dual-band high-gain smart gateway antenna of claim 2, wherein: the antenna shell is flat, and the length, width and height of the antenna shell are 93mm 12mm 0.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920829574.8U CN209843947U (en) | 2019-06-04 | 2019-06-04 | Double-frequency high-gain intelligent gateway antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920829574.8U CN209843947U (en) | 2019-06-04 | 2019-06-04 | Double-frequency high-gain intelligent gateway antenna |
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| Publication Number | Publication Date |
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| CN209843947U true CN209843947U (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920829574.8U Withdrawn - After Issue CN209843947U (en) | 2019-06-04 | 2019-06-04 | Double-frequency high-gain intelligent gateway antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148835A (en) * | 2019-06-04 | 2019-08-20 | 深圳市友华通信技术有限公司 | Double frequency high-gain intelligent gateway antenna |
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2019
- 2019-06-04 CN CN201920829574.8U patent/CN209843947U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148835A (en) * | 2019-06-04 | 2019-08-20 | 深圳市友华通信技术有限公司 | Double frequency high-gain intelligent gateway antenna |
| CN110148835B (en) * | 2019-06-04 | 2024-03-19 | 深圳市友华通信技术有限公司 | Dual-frequency high-gain intelligent gateway antenna |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191224 Effective date of abandoning: 20240319 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191224 Effective date of abandoning: 20240319 |