CN210111029U - Dual-band antenna and aircraft - Google Patents
Dual-band antenna and aircraft Download PDFInfo
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- CN210111029U CN210111029U CN201920896248.9U CN201920896248U CN210111029U CN 210111029 U CN210111029 U CN 210111029U CN 201920896248 U CN201920896248 U CN 201920896248U CN 210111029 U CN210111029 U CN 210111029U
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Abstract
The utility model discloses a dual-frequency antenna and aircraft, wherein the dual-frequency antenna comprises a substrate, a first radiation patch, a second radiation patch, a coaxial line and a radiant tube, wherein the first radiation patch and the second radiation patch are arranged on the surface of the substrate; the coaxial line comprises an inner conductor and an outer conductor insulated and isolated from the inner conductor; the first radiation patch is provided with a feed point, and the inner lead is electrically connected with the first radiation patch through the feed point so as to feed power to the first radiation patch; the second radiation patch is provided with a grounding point, one end of the outer lead is electrically connected with the second radiation patch through the grounding point, and the outer lead is electrically connected with the radiation tube. The utility model discloses simplify the feed structure of antenna, optimized antenna structure to realize the stable dual-frenquency radiation of antenna under limited space.
Description
Technical Field
The utility model relates to a communication equipment technical field especially relates to a dual-frenquency antenna and aircraft.
Background
With the rapid development of wireless communication and the demand of various data services, the antenna design mainly develops towards miniaturization, multiple frequency bands and wide frequency bands, the miniaturization requires the antenna to reduce the size of the antenna, so as to adapt to the development trend that the integration level of communication equipment is continuously improved and the volume is smaller and smaller.
Two microstrip antennas of the existing dual-frequency antenna simultaneously feed on the front and back surfaces of the substrate by using two feeding coaxial lines respectively, so that the feeding structure of the antenna is complex, a feeding network needs at least two ports to be connected with the antenna in application, the burden of a radio frequency end is increased, and the antenna structure is complex.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a dual-band antenna and an aircraft, which are designed to simplify the dual-band radiation of the preferred feed structure.
In order to achieve the above object, the utility model provides a dual-band antenna, dual-band antenna includes:
the coaxial radiation device comprises a substrate, a first radiation patch, a second radiation patch, a coaxial line and a radiation tube, wherein the first radiation patch and the second radiation patch are arranged on the surface of the substrate;
the coaxial line comprises an inner conductor and an outer conductor insulated and isolated from the inner conductor;
the first radiation patch is provided with a feed point, and the inner lead is electrically connected with the first radiation patch through the feed point so as to feed power to the first radiation patch;
the second radiation patch is provided with a grounding point, one end of the outer lead is electrically connected with the second radiation patch through the grounding point, and the outer lead is electrically connected with the radiation tube.
Preferably, the second radiation patch is provided with a first gap, and the first gap extends towards one side of the first radiation patch;
the first radiating patch comprises a feed arm and a first oscillator arm, the feed arm is arranged in the first gap, a feed point is arranged on one side of the feed arm, which is far away from the first oscillator arm, and the inner lead is electrically connected with the first radiating patch through the feed point;
the first oscillator arm is exposed out of the first gap and is electrically connected with the feed arm.
Preferably, the first oscillator arm includes a feeding portion and an oscillator portion, and the feeding portion is disposed between the oscillator portion and the feeding arm.
Preferably, the feeding portion is triangular, trapezoidal or elliptical.
Preferably, the oscillator portion is provided with a feeding slot.
Preferably, the feed slot is rectangular and elliptical.
Preferably, the pendulum part has a rectangular shape, a trapezoidal shape, a U-shape, or a tapered shape.
Preferably, the second radiating patch includes a grounding arm, a grounding point is disposed on a side of the grounding arm away from the first radiating patch, the external conductor is electrically connected to the second radiating patch through the grounding point, and the first slot is disposed in the grounding arm.
Preferably, the second radiating patch further includes a second oscillator arm and a third oscillator arm, and the second oscillator arm and the third oscillator arm are respectively disposed on two opposite sides of the first slot in the extending direction and electrically connected to the ground arm;
a second gap is formed between the second oscillator arm and the grounding arm;
and a third gap is arranged between the third oscillator arm and the grounding arm.
Preferably, the extending direction of the second vibrator arm and the extending direction of the first slit are opposite to each other;
the third oscillator arm and the second oscillator arm have the same extension direction and are symmetrically arranged on two opposite sides of the first gap.
Preferably, the dual band antenna may generate a resonance of a first radiation band and a resonance of a second radiation band; the first radiation frequency band is 2.35GHz-2.55 GHz; the second radiation frequency band is 880MHz-940 MHz.
The utility model also provides an aircraft, the aircraft include the fuselage, with the horn that the fuselage links to each other, locate the power device of horn, locate the undercarriage of fuselage and aforementioned dual-frenquency antenna, the dual-frenquency antenna sets up in the undercarriage.
Compared with the prior art, the utility model provides a dual-frenquency antenna has following advantage:
1. through set up first radiation paster and second radiation paster on the base plate, utilize the inner conductor and the first radiation paster electricity of coaxial line to be connected, for this dual-frenquency antenna feed, the outer conductor of coaxial line is connected with second radiation paster and radiant tube electricity respectively to regard radiant tube and second radiation paster as radiation component jointly, simplify feed structure, optimized the radiating body structure of antenna, make antenna overall structure more small and exquisite, can realize the single feed dual-frenquency radiation of antenna simultaneously.
2. The first slot extending towards one side of the first radiation patch is arranged on the second radiation patch, the feed arm of the first radiation patch is arranged in the first slot, the first oscillator arm electrically connected with the feed arm is exposed and arranged in the first slot, and center feed of a strip line structure is utilized, so that the dual-frequency antenna structure is small and compact.
Meanwhile, the second oscillator arm and the third oscillator arm are respectively arranged on two opposite sides of the feed arm, a second gap is formed between the second oscillator arm and the grounding arm, and a third gap is formed between the third oscillator arm and the grounding arm, so that the high-frequency characteristic of the dual-frequency antenna is better, and better omni-directionality is realized in a limited space.
Drawings
Fig. 1 is a schematic structural diagram of a dual-band antenna provided by the present invention;
fig. 2 is a schematic structural diagram of a first radiation patch and a second radiation patch of a dual-band antenna.
Fig. 3A is a schematic diagram of a modified structure of the first dipole arm of the first radiation patch.
Fig. 3B is a schematic diagram of a modified structure of the first dipole arm of the first radiation patch.
Fig. 3C is a schematic diagram of a modified structure of the first dipole arm of the first radiation patch.
Fig. 3D is a schematic diagram of a modified structure of the first dipole arm of the first radiation patch.
Fig. 4 is a schematic structural diagram of the second radiation patch and the first radiation patch of the dual-band antenna.
Fig. 5 is a graph of S-curve parameters for a dual-band antenna.
Fig. 6A is a 900MHz pattern for a dual-band antenna.
Fig. 6B is a pattern of the dual-band antenna at 2.45 GHz.
Fig. 7 is a schematic top view of an aircraft according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a dual-band antenna 100 according to a first embodiment of the present invention includes a substrate 10, a first radiation patch 20, a second radiation patch 30, a coaxial line 40, and a radiation tube 50. The substrate 10 is made of an insulating material such as plastic or glass fiber, and is used for bearing the first radiation patch 20 and the second radiation patch 30, the substrate 10 includes a first surface and a second surface which are oppositely disposed, and the first radiation patch 20 is disposed on the first surface or the second surface.
The second radiation patch 30 and the first radiation patch 20 are disposed on the same surface of the substrate 10 or disposed on a first surface and a second surface opposite to the substrate 10, respectively, and in this embodiment, the second radiation patch 30 and the first radiation patch 20 are disposed on the same surface of the substrate 10 as an example. The first radiating patch 20 is fed by an inner conductor 401 of the coaxial line 40, i.e. electrically connected to a feeding means or feeding network by the inner conductor 401. The second radiation patch 30 and the radiation tube 50 are electrically connected through the outer conductor 402 of the coaxial line 40, so that the radiation tube 50 and the second radiation patch 30 are used together as a radiation component, thereby enhancing the radiation performance of the dual-band antenna 100. When fed, the dual band antenna 100 may generate a resonance in the first radiation band and a resonance in the second radiation band. Wherein, the first radiation frequency band is 2.35GHz-2.55GHz, and the second radiation frequency band is 880MHz-940 MHz.
Preferably, the radiation tube 50 is a copper tube in the shape of a cylindrical or conical sleeve structure, i.e., a sleeve structure, and the length of the radiation tube 50 is 1/8-3/4 of the low frequency resonance wavelength.
Preferably, the length D of the outer conductor 402 between the radiating tube 50 and the first radiating patch 20 is greater than zero and less than 1/4 of the low frequency resonant wavelength.
The inner conductor 401 of the coaxial line 40 is electrically connected with the first radiation patch 20 to feed the dual-frequency antenna 100, and the outer conductor 402 of the coaxial line 40 is electrically connected with the second radiation patch 20 and the radiation tube 50 respectively, so that the radiation tube 50 and the second radiation patch 30 are jointly used as radiation components, the feed structure is simplified, the radiation structure of the dual-frequency antenna 100 is optimized, single-feed dual-frequency radiation of the antenna is realized, the directional diagram performance of the antenna with low frequency is better, and the standing wave bandwidth is better.
Preferably, the radiation tube 50 is in a sleeve or sleeve structure, that is, a through hole 501 is formed in the radiation tube 50, and the inner lead 401 of the coaxial line 40 or the coaxial line 40 passes through the through hole 501, so that the electrical connection stability between the radiation tube 50 and the coaxial line 40 is better.
Referring to fig. 2, the second radiation patch 30 is formed with a first slit 301, and the first slit 301 extends toward the first radiation patch 20. The first radiating patch 20 includes a feed arm 201 and a first dipole arm 202. The feed arm 201 is disposed in the first slot 301 in a strip structure, a feed point 2011 is disposed on a side of the feed arm 201 away from the first dipole arm 202, and the inner wire 401 is electrically connected to the first radiation patch 202 through the feed point 2011. The first dipole arm 202 is exposed to the first slot 301 and electrically connected to the feeding arm 202.
By providing the second radiation patch 30 with the first slot 301 extending toward one side of the first radiation patch 30, the feeding arm 201 of the first radiation patch 20 is disposed in the first slot 301, and the first oscillator arm 202 electrically connected to the feeding arm 201 is exposed and disposed in the first slot 301, so that the dual-band antenna has a smaller and more compact structure, and achieves better omni-directionality in a limited space.
Specifically, the first vibrator arm 202 includes a feeding section 2023 and a vibrator section 2021. The feeding portion 2023 is disposed between the oscillator portion 2021 and the feeding arm 201, and can be used as a radiation structure of the first oscillator arm 202 and adjust the impedance of the dual-band antenna 100, so as to increase the bandwidth of the radiation frequency band of the first radiation patch 20, and make the performance of the dual-band antenna 100 more stable.
Preferably, the feeding portion 2023 is triangular, trapezoidal or elliptical, so that the dual-band antenna 100 has better stability.
Preferably, the vibrator portion 2021 has a rectangular shape, a trapezoidal shape, a tapered shape, a U-shape, or a bent shape with a plurality of bends, as shown in fig. 3A to 3B.
Preferably, the first dipole arm 202 has an extension length of 1/8 to 3/4 of the high-frequency resonance wavelength in a first direction, i.e., an extension direction of the first slot.
Preferably, the first radiation patch 20 has an extension length in the first direction of 1/8 ~ 3/4 of the low frequency resonance wavelength.
Referring to fig. 3C-3D, the vibrator portion 2021 is formed with a feeding gap 2023, and the feeding gap 2023 may be rectangular, elliptical or triangular.
Referring to fig. 4, the second radiating patch 30 includes a grounding arm 302, a grounding point 3021 is disposed on a side of the grounding arm 302 away from the first radiating patch 20, the outer conductive wire 402 is electrically connected to the second radiating patch 30 through the grounding point 3021, and the first slot 301 is disposed on the grounding arm 302.
The second radiation patch 30 further includes a second dipole arm 304 and a third dipole arm 305, the second dipole arm 304 and the third dipole arm 305 are respectively disposed at opposite sides of the extending direction of the first slot 301, and one end of the second dipole arm 304 and one end of the third dipole arm 305 are both electrically connected to the ground arm 302.
A second gap 306 is disposed between the second dipole arm 304 and the ground arm 302, a third gap 307 is disposed between the third dipole arm 305 and the ground arm 302, and the second dipole arm 304 and the third dipole arm 305 are symmetrically disposed on two opposite sides of the feeding arm 201.
Preferably, the second dipole arm 304 and/or the third dipole arm 305 are L-shaped, and the extension length in the first direction is 1/8-3/4 of the high-frequency resonance wavelength.
Preferably, the second radiation patch 30 extends in the first direction for a length 1/8-3/4 of the low frequency resonance wavelength.
Further, a first slot 301 is formed in the ground arm 302 of the second radiating patch 30, and the feeding arm 201 is disposed in the first slot 301, so that the first dipole arm 202 is exposed to the first slot. Meanwhile, the second vibrator arm 304 and the third vibrator arm 305 are respectively disposed at opposite sides in the extending direction of the first slit 301. Meanwhile, a second gap 306 is provided between the second dipole arm 304 and the ground arm 302, and a third gap 307 is provided between the third dipole arm 305 and the ground arm 302, so that the high-frequency characteristics of the dual-band antenna 100 are more excellent.
When feeding, the first dipole arm 202 of the first radiation patch 20 and the second dipole arm 304 and the third dipole arm 305 of the second radiation patch 30 may generate resonance in the first radiation frequency band, that is, high-frequency resonance. The radiation tube 50 and the first radiation patch 20 may generate resonance of the second radiation band, i.e., low frequency resonance. The first oscillator arm 202 is shared by low-frequency radiation and high-frequency radiation, so that the size of the antenna is effectively reduced, and the antenna directional pattern performance and the standing wave bandwidth are better by utilizing the center feed of the strip line structure.
As shown in fig. 5, it can be seen that the dual-band antenna 100 can operate at 880MHz to 940MHz and 2.35GHz to 2.55GHz, and has bandwidths of 60MHz (5.5%) and 200MHz (8.0%), respectively, which satisfy the coverage of the commonly used 900MHz and 2.45GHz bands.
As shown in fig. 6A, it can be seen that the dual-band antenna 100 can achieve omnidirectional coverage at 900MHz, and the maximum value of the antenna radiation direction is in the horizontal direction.
As shown in fig. 6B, it can be seen that the dual-band antenna 100 can achieve omnidirectional coverage at 2.45GHz, and the maximum value of the radiation direction is in the horizontal direction.
Referring to fig. 7, a second embodiment of the present invention provides an aircraft 200, where the aircraft 200 includes a fuselage 60, a horn 70 connected to the fuselage 60, a power device 80 disposed on the horn 70, a landing gear 90 disposed on the fuselage 60, and a dual-band antenna 100. Wherein the power device 80 is used to provide flight power for the aircraft 200 and the dual-band antenna 100 is disposed in the landing gear 90.
In this embodiment, the bottom view of the aircraft is taken as an example to schematically show the installation position of the dual-band antenna 100, the installation position of the dual-band antenna 100 in this embodiment is not limited to the installation position shown in fig. 7, and other installation positions of the dual-band antenna 100 that can better satisfy signal transceiving may be also used.
The dual-band antenna 100 provided in the landing gear 90 of the aircraft 200 widens the bandwidth of the dual-band antenna 100 in the elevation plane, and the signal remains stable when the antenna is tilted. Therefore, the influence of the flying posture of the aircraft on the communication is reduced in the flying process of the aircraft, and the communication of the aircraft 200 in the flying process is guaranteed.
Compared with the prior art, the utility model provides a dual-frenquency antenna has following advantage:
1. through set up first radiation paster and second radiation paster on the base plate, utilize the inner conductor and the first radiation paster electricity of coaxial line to be connected, for this dual-frenquency antenna feed, the outer conductor of coaxial line is connected with second radiation paster and radiant tube electricity respectively to regard radiant tube and second radiation paster as radiation component jointly, simplify feed structure, optimized the radiating body structure of antenna, make antenna overall structure more small and exquisite, can realize the single feed dual-frenquency radiation of antenna simultaneously.
2. The first slot extending towards one side of the first radiation patch is arranged on the second radiation patch, the feed arm of the first radiation patch is arranged in the first slot, the first oscillator arm electrically connected with the feed arm is exposed and arranged in the first slot, and center feed of a strip line structure is utilized, so that the dual-frequency antenna structure is small and compact.
Meanwhile, the second oscillator arm and the third oscillator arm are respectively arranged on two opposite sides of the feed arm, a second gap is formed between the second oscillator arm and the grounding arm, and a third gap is formed between the third oscillator arm and the grounding arm, so that the high-frequency characteristic of the dual-frequency antenna is better, and better omni-directionality is realized in a limited space.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (12)
1. A dual-band antenna, comprising:
the coaxial radiation device comprises a substrate, a first radiation patch, a second radiation patch, a coaxial line and a radiation tube, wherein the first radiation patch and the second radiation patch are arranged on the surface of the substrate;
the coaxial line comprises an inner conductor and an outer conductor insulated and isolated from the inner conductor;
the first radiation patch is provided with a feed point, and the inner lead is electrically connected with the first radiation patch through the feed point so as to feed power to the first radiation patch;
the second radiation patch is provided with a grounding point, one end of the outer lead is electrically connected with the second radiation patch through the grounding point, and the outer lead is electrically connected with the radiation tube.
2. The dual-band antenna of claim 1, wherein: the second radiation patch is provided with a first gap, and the first gap extends towards one side of the first radiation patch;
the first radiating patch comprises a feed arm and a first oscillator arm, the feed arm is arranged in the first gap, a feed point is arranged on one side of the feed arm, which is far away from the first oscillator arm, and the inner lead is electrically connected with the first radiating patch through the feed point;
the first oscillator arm is exposed out of the first gap and is electrically connected with the feed arm.
3. The dual-band antenna of claim 2, wherein: the first oscillator arm comprises a feeding portion and an oscillator portion, and the feeding portion is arranged between the oscillator portion and the feeding arm.
4. A dual-band antenna as claimed in claim 3, wherein: the feed portion is triangular, trapezoidal or elliptical.
5. A dual-band antenna as claimed in claim 3, wherein: the oscillator part is provided with a feed gap.
6. The dual-band antenna of claim 5, wherein: the feed gap is rectangular or elliptical.
7. A dual-band antenna as claimed in claim 3, wherein: the vibrator part is rectangular, trapezoidal, U-shaped or conical.
8. The dual-band antenna of claim 2, wherein: the second radiation patch comprises a grounding arm, a grounding point is arranged on one side, away from the first radiation patch, of the grounding arm, the outer lead is electrically connected with the second radiation patch through the grounding point, and the first gap is formed in the grounding arm.
9. The dual-band antenna of claim 8, wherein: the second radiating patch further comprises a second oscillator arm and a third oscillator arm, and the second oscillator arm and the third oscillator arm are respectively arranged on two opposite sides of the extending direction of the first gap and are electrically connected with the grounding arm;
a second gap is formed between the second oscillator arm and the grounding arm;
and a third gap is arranged between the third oscillator arm and the grounding arm.
10. The dual-band antenna of claim 9, wherein: the extending direction of the second vibrator arm is opposite to the extending direction of the first gap;
the third oscillator arm and the second oscillator arm have the same extension direction and are symmetrically arranged on two opposite sides of the first gap.
11. A dual-band antenna as claimed in any one of claims 1 to 10, wherein: the dual-band antenna can generate resonance of a first radiation frequency band and resonance of a second radiation frequency band; the first radiation frequency band is 2.35GHz-2.55 GHz; the second radiation frequency band is 880MHz-940 MHz.
12. An aircraft comprising a fuselage, a horn connected to the fuselage, a power plant provided in the horn, landing gear provided in the fuselage, and a dual-band antenna according to any one of claims 1 to 11, the dual-band antenna being provided in the landing gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920896248.9U CN210111029U (en) | 2019-06-14 | 2019-06-14 | Dual-band antenna and aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920896248.9U CN210111029U (en) | 2019-06-14 | 2019-06-14 | Dual-band antenna and aircraft |
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| CN210111029U true CN210111029U (en) | 2020-02-21 |
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| CN201920896248.9U Active CN210111029U (en) | 2019-06-14 | 2019-06-14 | Dual-band antenna and aircraft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112164872A (en) * | 2020-08-31 | 2021-01-01 | 西安朗普达通信科技有限公司 | 5G multifrequency antenna |
| CN113823905A (en) * | 2021-08-26 | 2021-12-21 | 四川数字交通科技股份有限公司 | Electronic tag for Internet of things |
-
2019
- 2019-06-14 CN CN201920896248.9U patent/CN210111029U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112164872A (en) * | 2020-08-31 | 2021-01-01 | 西安朗普达通信科技有限公司 | 5G multifrequency antenna |
| CN113823905A (en) * | 2021-08-26 | 2021-12-21 | 四川数字交通科技股份有限公司 | Electronic tag for Internet of things |
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Address after: 518055 Shenzhen, Guangdong, Nanshan District Xili street, No. 1001, Zhiyuan Road, B1 9. Patentee after: Shenzhen daotong intelligent Aviation Technology Co.,Ltd. Address before: 518055 Shenzhen, Guangdong, Nanshan District Xili street, No. 1001, Zhiyuan Road, B1 9. Patentee before: AUTEL ROBOTICS Co.,Ltd. |
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