CN113078457A - Double-frequency double-fed high-gain antenna and electronic equipment - Google Patents
Double-frequency double-fed high-gain antenna and electronic equipment Download PDFInfo
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- CN113078457A CN113078457A CN202110191453.7A CN202110191453A CN113078457A CN 113078457 A CN113078457 A CN 113078457A CN 202110191453 A CN202110191453 A CN 202110191453A CN 113078457 A CN113078457 A CN 113078457A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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Abstract
The invention discloses a double-frequency double-fed high-gain antenna and electronic equipment, which comprise a PCB (printed circuit board), a first antenna unit, a second antenna unit, a combiner, a high-frequency feeder line, a low-frequency feeder line and a transmission line, wherein the PCB is provided with a first antenna unit and a second antenna unit; the combiner is a microstrip combiner; the first antenna unit comprises a first radiator and a second radiator, the second antenna unit comprises a third radiator, the combiner comprises a combining layer and a grounding layer, and the transmission lines comprise a first transmission line and a second transmission line; the first radiator, the third radiator, the combining layer and the first transmission line are arranged on the first surface of the PCB, and the second radiator, the ground layer and the second transmission line are arranged on the second surface of the PCB; the high-frequency feeder line and the low-frequency feeder line are respectively connected with the combining layer, and the combining layer is sequentially connected with the third radiator and the first radiator through a first transmission line; the ground layer is connected with the second radiator through a second transmission line. The invention can solve the problems of complex production process, higher overall cost and larger antenna size in the existing scheme.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a double-frequency double-fed high-gain antenna and electronic equipment.
Background
With the popularization of the 802.11ac technology, the WIFI module and the antenna of a router or an ONT (Optical Network Terminal, commonly called Optical modem) need to support both low-frequency 2.4GHz and high-frequency 5GHz bands. In order to make the high-frequency band and the low-frequency band coexist, the high-frequency antenna and the low-frequency antenna are generally required to work independently (with the isolation degree being more than 20 dB), and in order to reduce the cost of the antenna, the high-frequency antenna and the low-frequency antenna need to be arranged in the same antenna, which puts forward the requirement of dual-frequency and dual-feed. In addition, in order to solve the problem of weak signals after the wall penetration of the home environment, the WIFI antenna is required to have high gain (gain >4dBi), and at least 2 unit antenna arrays are required to improve the gain.
In a chinese patent with publication No. CN207852916U entitled "a high-gain dual-band dual-feed omnidirectional antenna", high and low frequency antennas are respectively disposed on both sides of a PCB, which solves the problem of independent operation and high gain of the high and low frequency antennas. However, 2 coaxial cables are used for connecting 2 unit antennas of the high-frequency antenna and the low-frequency antenna, at least 8 welding points are additionally added, the production process is complex, and the overall cost is high. And the high-low frequency antenna is designed in a staggered mode for improving the isolation, and the size of the antenna is additionally increased.
In chinese patent publication No. CN209119338U entitled "dual-band dual-feed antenna integrated with combiner", high and low frequency antennas are also realized to work independently and have high gain, and coaxial lines connecting 2 unit antennas are removed. However, in addition, 1 SMT combiner and 1 antenna spring are added, 5 welding points are added, and the problems of complex production process and high overall cost still exist. And the combiner and the antenna are designed in a segmented mode, and the size of the antenna is additionally increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the double-frequency double-fed high-gain antenna and the electronic equipment can solve the problems that the production process is complex, the overall cost is high and the size of the antenna is large in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a dual-frequency double-fed high-gain antenna comprises a PCB, a first antenna unit, a second antenna unit, a combiner, a high-frequency feeder, a low-frequency feeder and a transmission line; the combiner is a microstrip combiner; the PCB board comprises a first surface and a second surface which are opposite, the first antenna unit comprises a first radiator and a second radiator, the second antenna unit comprises a third radiator, the combiner comprises a combining layer and a grounding layer, and the transmission line comprises a first transmission line and a second transmission line; the first radiator, the third radiator, the combining layer and the first transmission line are arranged on the first surface of the PCB, and the second radiator, the ground layer and the second transmission line are arranged on the second surface of the PCB; the high-frequency feeder line and the low-frequency feeder line are respectively connected with the combining layer, and the combining layer is sequentially connected with a third radiator body and a first radiator body through the first transmission line; the ground layer is connected with the second radiator through a second transmission line.
The invention also provides electronic equipment comprising the dual-frequency and dual-feed high-gain antenna.
The invention has the beneficial effects that: all antenna circuits except the feeder line are arranged on the PCB, and the isolation of high and low frequencies is ensured by arranging the combiner, so that the dual-frequency-band coexistence work can be supported; two antenna units arranged on the PCB replace two independent high-frequency and low-frequency antennas, so that two connecting coaxial lines can be omitted, the production process is simplified, and the cost is reduced; the combiner can be integrated with two antenna units on the same board, and additional devices and production processes are not added, so that the production process is further simplified, and the cost is reduced. The invention can solve the problems of complex production process, higher overall cost and larger antenna size in the prior art.
Drawings
Fig. 1 is a schematic structural diagram of a dual-band dual-feed high-gain antenna according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of S parameters of an antenna according to a first embodiment of the present invention;
fig. 3 is a simulated 3D pattern of a first shunt end excitation, a second shunt end 50 ohm load according to a first embodiment of the present invention;
fig. 4 is a simulated 3D pattern of a second shunt-end excitation, first shunt-end 50 ohm load according to a first embodiment of the present invention;
fig. 5 is a schematic diagram of an antenna structure according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of an antenna structure according to a third embodiment of the present invention.
Description of reference numerals:
1. a PCB board; 2. a first antenna element; 3. a second antenna element; 4. a combiner; 5. a high frequency feed line; 6. a low frequency feed line; 7. a transmission line; 8. a high-frequency antenna unit;
11. a first side; 12. a second face;
21. a first radiator; 22. a second radiator;
31. a third radiator;
41. a combining layer; 42. a ground plane;
71. a first transmission line; 72. a second transmission line;
81. a first high frequency radiator; 82. a second high frequency radiator;
211. a first high frequency branch; 212. a first low frequency branch; 213. a first connecting branch;
221. a second high frequency branch; 222. a second low frequency branch; 223. a second connecting branch;
311. a third high frequency branch; 312. a third low frequency branch; 313. a third connecting branch knot;
411. a path combining end; 412. a first shunt end; 413. a second shunt end; 414. a first shunt; 415. a second branch circuit; 416. a high frequency trap; 417. a low frequency trap.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, a dual-band dual-feed high-gain antenna includes a PCB board, a first antenna unit, a second antenna unit, a combiner, a high-frequency feeder, a low-frequency feeder, and a transmission line; the combiner is a microstrip combiner; the PCB board comprises a first surface and a second surface which are opposite, the first antenna unit comprises a first radiator and a second radiator, the second antenna unit comprises a third radiator, the combiner comprises a combining layer and a grounding layer, and the transmission line comprises a first transmission line and a second transmission line; the first radiator, the third radiator, the combining layer and the first transmission line are arranged on the first surface of the PCB, and the second radiator, the ground layer and the second transmission line are arranged on the second surface of the PCB; the high-frequency feeder line and the low-frequency feeder line are respectively connected with the combining layer, and the combining layer is sequentially connected with a third radiator body and a first radiator body through the first transmission line; the ground layer is connected with the second radiator through a second transmission line.
From the above description, the beneficial effects of the present invention are: two antenna units arranged on the PCB replace two independent high-frequency and low-frequency antennas, so that two connecting coaxial lines can be omitted, the production process is simplified, and the cost is reduced; the combiner can be integrated with two antenna units on the same board, and additional devices and production processes are not added, so that the production process is further simplified, and the cost is reduced.
Further, the combining layer comprises a combining end, a first splitting end, a second splitting end, a first splitting and a second splitting; two ends of the first shunt are respectively connected with the closing end and the first shunt end, and two ends of the second shunt are respectively connected with the closing end and the second shunt end; the low-frequency feeder line is connected with the first shunt end, and the high-frequency feeder line is connected with the second shunt end.
As can be seen from the above description, by providing the combiner, the isolation of high and low frequencies is ensured, so that the dual-band coexistence operation can be supported.
Furthermore, a high-frequency wave trap is arranged on the first branch, and a low-frequency wave trap is arranged on the second branch.
It can be known from the above description that, through setting up high frequency wave trap and low frequency wave trap, avoid the high frequency electric signal to get into first branch circuit end and the low frequency electric signal gets into the second branch circuit end to can obtain better high frequency isolation and low frequency isolation.
Furthermore, the first radiator comprises a first high-frequency branch and a first low-frequency branch, and the first high-frequency branch and the first low-frequency branch are respectively connected with the first transmission line; the second radiator comprises a second high-frequency branch and a second low-frequency branch, and the second high-frequency branch and the second low-frequency branch are respectively connected with the second transmission line; the third radiator comprises a third high-frequency branch and a third low-frequency branch, and the third high-frequency branch and the third low-frequency branch are respectively connected with the first transmission line.
Further, the length of the ground plane is a quarter wavelength length of a center frequency of a low frequency band of the dual-frequency doubly-fed high-gain antenna, or a half wavelength length of a center frequency of a high frequency band of the dual-frequency doubly-fed high-gain antenna.
As can be seen from the above description, adjusting the size of the ground layer can make the ground layer resonate in the low frequency band or the high frequency band, and the ground layer of the combiner is equivalent to the second radiating arm of the second antenna unit, and forms a fully functional dipole antenna with the third radiator.
Further, the width of the trace of the first antenna unit is smaller than the width of the trace of the second antenna unit.
Further, the distance between the first antenna unit and the second antenna unit is from one half wavelength length to one wavelength length of the center frequency of the low frequency band.
As can be seen from the above description, since the high-frequency and low-frequency antennas are formed by two antenna element arrays, the trace width and the distance between the two antenna elements are properly adjusted, and the amplitude ratio and the phase difference between the two antenna elements can be adjusted, so that the high-frequency and low-frequency antennas can obtain higher gain.
Further, still include high frequency antenna unit, high frequency antenna unit set up in the first face and/or the second face of PCB board, high frequency antenna unit with transmission line connection, and set up in between first antenna unit and the second antenna unit.
As can be seen from the above description, by adding the high-frequency antenna unit between the first antenna unit and the second antenna unit, the high-frequency band directional diagram index can be optimized without increasing the size and cost.
Further, the transmission line is a snake-shaped routing.
From the above description, it can be known that the phase difference between the antenna units can be adjusted, and the high-low frequency directional diagram index of the antenna can be further optimized on the premise of not increasing the size and the cost.
The invention also provides electronic equipment comprising the dual-frequency and dual-feed high-gain antenna.
Example one
Referring to fig. 1-4, a first embodiment of the present invention is: a dual-frequency double-fed high-gain antenna can be applied to a router or an ONT, and dual frequencies in the embodiment are 2.4GHz and 5GHz of WIFI respectively.
As shown in fig. 1, the antenna assembly includes a PCB board 1, a first antenna unit 2, a second antenna unit 3, a combiner 4, a high frequency feeder 5, a low frequency feeder 6, and a transmission line 7, wherein the PCB board 1 includes a first face 11 (top face) and a second face 12 (bottom face) which are opposite to each other, the first antenna unit 2 includes a first radiator 21 and a second radiator 22, the second antenna unit 3 includes a third radiator 31, the combiner 4 includes a combiner layer 41 and a ground layer 42, and the transmission line 7 includes a first transmission line 71 and a second transmission line 72. The first radiator 21, the third radiator 31, the combining layer 41 and the first transmission line 71 are disposed on the first surface 11 of the PCB board 1, and the second radiator 22, the ground layer 42 and the second transmission line 72 are disposed on the second surface 12 of the PCB board 1. Preferably, the combiner 4 is a microstrip combiner; the combiner 4 is arranged at one end of the PCB board 1. The transmission line 7 is an on-board transmission line.
The high-frequency feeder line 5 and the low-frequency feeder line 6 are respectively connected to the combining layer 41, and the combining layer 41 is sequentially connected to the third radiator 31 and the first radiator 21 through the first transmission line 71. That is to say, the combining layer is connected with one end of the first transmission line, the third radiator is connected with one end of the first transmission line, that is, the third radiator is arranged close to the combining layer, and the first radiator is connected with the other end of the first transmission line. The ground layer 42 is connected to the second radiator 22 through a second transmission line 72.
Further, the combining layer 41 includes a combining end 411, a first splitting end 412, a second splitting end 413, a first splitting 414, and a second splitting 415; two ends of the first branch 414 are respectively connected to the combining end 411 and the first branch end 412, and two ends of the second branch 415 are respectively connected to the combining end 411 and the second branch end 413; the low frequency feeder 6 is connected to the first shunt terminal 412, and the high frequency feeder 5 is connected to the second shunt terminal 413; the combining end 411 is connected to one end of the first transmission line 71.
Further, a high frequency trap 416 is disposed on the first branch 414, and a low frequency trap 417 is disposed on the second branch 415. Preferably, the number of the high-frequency wave traps is two, and the two high-frequency wave traps are respectively connected with the first branch circuit. By arranging two high-frequency wave traps, the problem of isolation can be better solved.
Further, the first radiator 21 includes a first high-frequency branch 211, a first low-frequency branch 212, and a first connection branch 213, where the first high-frequency branch 211 and the first low-frequency branch 212 are respectively connected to the first connection branch 213, and the first connection branch 213 is connected to the first transmission line 71. The second radiator 22 includes a second high-frequency branch 221 and a second low-frequency branch 222, and further includes a second connection branch 223, the second high-frequency branch 221 and the second low-frequency branch 222 are respectively connected to the second connection branch 223, and the second connection branch 223 is connected to the second transmission line 72. The third radiator 31 includes a third high-frequency branch 311 and a third low-frequency branch 312, and further includes a third connecting branch 313, the third high-frequency branch 311 and the third low-frequency branch 312 are respectively connected to the third connecting branch 313, and the third connecting branch 313 is connected to the first transmission line 72.
Wherein, only one high-frequency branch and only one low-frequency branch in each radiator may be provided, or as shown in fig. 1, each radiator includes two high-frequency branches and two low-frequency branches (the length of the high-frequency branch is shorter than that of the low-frequency branch). Preferably, two high-frequency branches in each radiator are distributed on two sides of the transmission line, and two low-frequency branches are also distributed on two sides of the transmission line.
In this embodiment, the first connecting branch and the third connecting branch are perpendicular to the first transmission line, and the first high-frequency branch, the first low-frequency branch, the third high-frequency branch and the third low-frequency branch are parallel to the first transmission line; the second connecting branch is vertical to the second transmission line, and the second high-frequency branch and the second low-frequency branch are parallel to the second transmission line.
The working principle of the antenna in the present embodiment is only illustrated in the antenna transmission scenario because the antenna transmission and reception are reciprocal:
1. the WIFI 2.4GHz low-frequency electric signal is fed into the first shunt end of the combiner from the low-frequency feeder line and reaches the combining end through the first shunt. Because the second branch is provided with the low-frequency wave trap, low-frequency electric signals cannot enter the second branch end, and better low-frequency isolation can be obtained.
The ground plane of the combiner is appropriately sized to resonate at 2.4GHz and 5 GHz. In this embodiment, the length of the ground layer is about a quarter wavelength length of the center frequency of the low frequency band (2.4GHz), and is also about a half wavelength length of the center frequency of the high frequency band (5 GHz). In this case, the ground plane of the combiner may be regarded as the second radiator of the second antenna unit, and the second radiator and the third radiator constitute a fully functional dipole antenna.
After the low-frequency electric signal is fed into the antenna from the combining end, part of the signal enters the second antenna unit, excites the third low-frequency branch in the third radiator and the ground layer in the combiner and radiates to the space, and the rest of the signal is transmitted to the first antenna unit through the transmission line, excites the first low-frequency branch in the first radiator and the second low-frequency branch in the second radiator and radiates to the space.
2. And the WIFI 5GHz high-frequency electric signal is fed into the second shunt end of the combiner from the high-frequency feeder line and reaches the combiner end through the second shunt. Because the first shunt is provided with two high-frequency wave traps which can sufficiently cover a 700MHz working frequency band (5.15-5.85GHz) of 5GHz, high-frequency electric signals can not enter the first shunt end, and better high-frequency isolation can be obtained.
The ground plane of the combiner is appropriately sized to resonate at 2.4GHz and 5 GHz. In this case, the ground plane of the combiner may be regarded as the second radiator of the second antenna unit, and the second radiator and the third radiator constitute a fully functional dipole antenna.
After the high-frequency electric signal is fed into the antenna from the combining end, part of the signal enters the second antenna unit, excites the third high-frequency branch in the third radiator and the ground layer in the combiner and radiates to the space, and the rest of the signal is transmitted to the first antenna unit through the transmission line, excites the first high-frequency branch in the first radiator and the second high-frequency branch in the second radiator and radiates to the space.
Further, in this embodiment, since the high-frequency and low-frequency antennas are formed by two antenna element arrays, the width of the trace and the distance between the two antenna elements are properly adjusted, and the amplitude ratio and the phase difference between the two antenna elements can be adjusted, so that the high-frequency and low-frequency antennas can obtain higher gain.
The width of the two antenna units determines the amplitude distribution of the two antenna units in the array; preferably, the width of the trace of the first antenna unit is smaller than that of the trace of the second antenna unit, that is, the trace of the first antenna unit is thinner than the trace of the second antenna unit. The transmission line has a trace width that determines its impedance, preferably in the range of about 50-100 ohms. The distance between the first antenna unit and the second antenna unit is from one half wavelength length of the center frequency of the low frequency band to one wavelength length, namely, the distance is greater than or equal to one half wavelength length of the center frequency of the low frequency band of the dual-frequency double-fed high-gain antenna and is less than or equal to one wavelength length of the center frequency of the low frequency band. Preferably, the spacing between the two antenna elements is one wavelength length of the center frequency of the low frequency band.
FIG. 2 is a schematic diagram of S parameters obtained by simulation of the antenna of this embodiment, as shown in FIG. 2, S11 is less than-15 dB in the 2.4G-2.5GHz operating band, S22 is less than-11 dB in the 5G-6GHz operating band, and S12 is less than-32 dB and-36 dB in the 2.4G-2.5GHz and 5G-6GHz operating bands, respectively. Wherein S11 represents the reflection coefficient of the first shunt end, S22 represents the reflection coefficient of the second shunt end, and S12 represents the coupling coefficient of the first shunt end and the second shunt end. It can be seen that this embodiment has realized the dual-frenquency double-fed demand of antenna, owing to use the combiner for high low frequency isolation is very excellent, supports WIFI 2.4GHz and 5GHz coexistence work better.
Fig. 3 is a simulated 3D pattern of the first shunt end excitation and the second shunt end 50 ohm load at 2.45GHz, with the maximum gain of the antenna at 4.1 dBi. Fig. 4 is a simulated 3D pattern of the second shunt-end excitation and the first shunt-end 50 ohm load at 5.5GHz, with the maximum gain of the antenna at 5 dBi. It can be seen that the high gains of 2.4GHz and 5GHz are realized by the array antenna in the present embodiment.
In the embodiment, the onboard double-frequency antenna replaces two independent high-frequency and low-frequency antennas, and the PCB onboard transmission line can replace a high-frequency/low-frequency connecting transmission line, so that two connecting coaxial lines are omitted, the production process is simplified, and the cost is reduced; the microstrip combiner can be directly integrated with the dual-frequency antenna common plate, and additional devices and production processes are not added, so that the production process is further simplified and the cost is reduced; the ground plane of the combiner is shared with the antenna radiation arm, the size is not additionally increased, and the total size of the antenna is smaller than the size of the combiner and the size of the high-gain dual-frequency antenna, so that the whole antenna is compact on the basis of maintaining low cost.
Example two
Referring to fig. 5, the present embodiment is a further development of the first embodiment, and the same points are not described again, but the present embodiment further includes a high-frequency antenna unit, and the high-frequency antenna unit is connected to the transmission line and disposed between the first antenna unit and the second antenna unit.
In this embodiment, the high-frequency antenna unit 8 includes a first high-frequency radiator 81 and a second high-frequency radiator 82, where the first high-frequency radiator 81 is disposed on the first surface 11 of the PCB; the first high frequency radiator 81 is connected to the first transmission line 71 and disposed between the first radiator 21 and the third radiator 31. The second high frequency radiator 82 is disposed on the second surface 12 of the PCB; the second high frequency radiator 82 is connected to the second transmission line 72 and disposed between the second radiator 22 and the ground layer 42 of the combiner.
In other embodiments, the first high frequency radiator and the second high frequency radiator may also be disposed on the first surface or the second surface of the PCB board at the same time.
In the embodiment, the high-frequency antenna unit is added between the first antenna unit and the second antenna unit, so that the 5G frequency band directional diagram index can be optimized on the premise of not increasing the size and the cost.
EXAMPLE III
Referring to fig. 6, this embodiment is a further development of the first embodiment or the second embodiment, and the same points are not described again, except that the transmission line 7 is a serpentine trace. That is, the on-board transmission line for connecting the antenna elements may be designed as a serpentine line for adjusting the phase difference between the antenna elements.
The method can further optimize the high-low frequency directional diagram index of the antenna on the premise of not increasing the size and the cost.
In summary, the dual-frequency and dual-feed high-gain antenna and the electronic device provided by the invention ensure the isolation of high and low frequencies by arranging the combiner, so that the dual-frequency band coexistence work can be supported; the onboard dual-frequency antenna replaces two independent high-frequency and low-frequency antennas, and a PCB onboard transmission line can replace a high-frequency/low-frequency connecting transmission line, so that two connecting coaxial lines are omitted, the production process is simplified, and the cost is reduced; the microstrip combiner can be directly integrated with the dual-frequency antenna common plate, and additional devices and production processes are not added, so that the production process is further simplified and the cost is reduced; the ground layer of the combiner is shared with the antenna radiation arm, the size is not additionally increased, and the whole antenna is compact on the basis of maintaining low cost. By adding the high-frequency antenna unit between the two antenna units, the 5G frequency band directional diagram index can be optimized on the premise of not increasing the size and the cost. The onboard transmission lines for connecting the antenna units are designed into serpentine lines for adjusting the phase difference among the antenna units, so that the high-low frequency directional diagram indexes of the antenna can be further optimized on the premise of not increasing the size and the cost.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A dual-frequency double-fed high-gain antenna is characterized by comprising a PCB (printed circuit board), a first antenna unit, a second antenna unit, a combiner, a high-frequency feeder, a low-frequency feeder and a transmission line; the combiner is a microstrip combiner;
the PCB board comprises a first surface and a second surface which are opposite, the first antenna unit comprises a first radiator and a second radiator, the second antenna unit comprises a third radiator, the combiner comprises a combining layer and a grounding layer, and the transmission line comprises a first transmission line and a second transmission line;
the first radiator, the third radiator, the combining layer and the first transmission line are arranged on the first surface of the PCB, and the second radiator, the ground layer and the second transmission line are arranged on the second surface of the PCB; the high-frequency feeder line and the low-frequency feeder line are respectively connected with the combining layer, and the combining layer is sequentially connected with a third radiator body and a first radiator body through the first transmission line; the ground layer is connected with the second radiator through a second transmission line.
2. The dual-band dual-feed high-gain antenna of claim 1, wherein the combining layer comprises a combining end, a first splitting end, a second splitting end, a first splitting end and a second splitting end; two ends of the first shunt are respectively connected with the closing end and the first shunt end, and two ends of the second shunt are respectively connected with the closing end and the second shunt end; the low-frequency feeder line is connected with the first shunt end, and the high-frequency feeder line is connected with the second shunt end.
3. The dual-band dual-feed high-gain antenna of claim 2, wherein the first branch is provided with a high frequency trap, and the second branch is provided with a low frequency trap.
4. The dual-band dual-feed high-gain antenna of claim 1, wherein the first radiator comprises a first high-frequency branch and a first low-frequency branch, and the first high-frequency branch and the first low-frequency branch are respectively connected to the first transmission line; the second radiator comprises a second high-frequency branch and a second low-frequency branch, and the second high-frequency branch and the second low-frequency branch are respectively connected with the second transmission line; the third radiator comprises a third high-frequency branch and a third low-frequency branch, and the third high-frequency branch and the third low-frequency branch are respectively connected with the first transmission line.
5. The dual-band dual-feed high-gain antenna according to claim 1, wherein the length of the ground plane is a quarter wavelength length of a center frequency of a low frequency band of the dual-band dual-feed high-gain antenna, or a half wavelength length of a center frequency of a high frequency band of the dual-band dual-feed high-gain antenna.
6. The dual-band dual-feed high-gain antenna according to claim 1, wherein the width of the trace of the first antenna element is smaller than the width of the trace of the second antenna element.
7. The dual-band dual-feed high-gain antenna of claim 1, wherein the first antenna element and the second antenna element are spaced apart from each other by a distance of one-half wavelength length to one wavelength length of a center frequency of a low frequency band thereof.
8. The dual-band dual-feed high-gain antenna according to claim 1, further comprising a high-frequency antenna element disposed on the first and/or second side of the PCB board, the high-frequency antenna element being connected to the transmission line and disposed between the first and second antenna elements.
9. A dual-band dual-feed high-gain antenna according to any of claims 1 to 8, wherein said transmission line is a serpentine trace.
10. An electronic device comprising a dual-band dual-feed high-gain antenna according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191453.7A CN113078457A (en) | 2021-02-19 | 2021-02-19 | Double-frequency double-fed high-gain antenna and electronic equipment |
Applications Claiming Priority (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256613A (en) * | 2021-11-30 | 2022-03-29 | 广州芯德通信科技股份有限公司 | Radiator and 5G high-gain omnidirectional antenna used for double-frequency mesh router |
| WO2024152909A1 (en) * | 2023-01-20 | 2024-07-25 | 华为技术有限公司 | Low-frequency antenna unit, high-frequency antenna unit, antenna array, and terminal device |
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| CN1992431A (en) * | 2005-12-31 | 2007-07-04 | 智易科技股份有限公司 | Asymmetric Planar Dipole Antenna |
| CN102780083A (en) * | 2012-07-26 | 2012-11-14 | 中国航天科工集团第三研究院第八三五七研究所 | Broadband communication antenna |
| CN208637603U (en) * | 2018-09-19 | 2019-03-22 | 佛山市健博通电讯实业有限公司 | A kind of MIMO omnidirectional terminal dipole antenna |
| CN109546330A (en) * | 2018-12-26 | 2019-03-29 | 东莞市仁丰电子科技有限公司 | A kind of feedback antenna of double frequency three of integrated combiner |
| CN110323577A (en) * | 2018-03-29 | 2019-10-11 | 江苏吴通物联科技有限公司 | A kind of double outlet high-gain omni-directional antennas of small sized double frequency |
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| CN1992431A (en) * | 2005-12-31 | 2007-07-04 | 智易科技股份有限公司 | Asymmetric Planar Dipole Antenna |
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| CN110323577A (en) * | 2018-03-29 | 2019-10-11 | 江苏吴通物联科技有限公司 | A kind of double outlet high-gain omni-directional antennas of small sized double frequency |
| CN208637603U (en) * | 2018-09-19 | 2019-03-22 | 佛山市健博通电讯实业有限公司 | A kind of MIMO omnidirectional terminal dipole antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256613A (en) * | 2021-11-30 | 2022-03-29 | 广州芯德通信科技股份有限公司 | Radiator and 5G high-gain omnidirectional antenna used for double-frequency mesh router |
| WO2024152909A1 (en) * | 2023-01-20 | 2024-07-25 | 华为技术有限公司 | Low-frequency antenna unit, high-frequency antenna unit, antenna array, and terminal device |
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Application publication date: 20210706 |