CN209217213U - A kind of conical-horn antenna - Google Patents
A kind of conical-horn antenna Download PDFInfo
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- CN209217213U CN209217213U CN201920249774.6U CN201920249774U CN209217213U CN 209217213 U CN209217213 U CN 209217213U CN 201920249774 U CN201920249774 U CN 201920249774U CN 209217213 U CN209217213 U CN 209217213U
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Abstract
The utility model discloses a kind of conical-horn antennas, belong to satellite communication and technical field of micro communication.It includes conical horn mouth, low-frequency resonant chamber and high-frequency resonant cavity, and the diameter of high-frequency resonant cavity is less than the diameter of low-frequency resonant chamber；First coupling slot there are two being set in the cavity wall of low-frequency resonant chamber, first arcuate furrow along resonant cavity circumferentially extending is equipped at the coupling port of each first coupling slot, second coupling slot there are two being set in the cavity wall of high-frequency resonant cavity, second arcuate furrow along resonant cavity circumferentially extending is equipped at the coupling port of each second coupling slot, the extending direction of the second arcuate furrow is opposite with the extending direction of the first arcuate furrow；It polarizes probe in low-frequency resonant chamber inserted with low frequency, inserted with high frequency polarized probe in high-frequency resonant cavity, plane determined by two the first coupling slots and low frequency polarization probe are in 45 degree angles, and high frequency polarized probe and low frequency polarization probe are in 90 degree of angles.The antenna structure is simple, compact, and radiation efficiency is high.
Description
Technical field
The utility model relates to satellite communications and technical field of micro communication, particularly relate to a kind of conical-horn antenna.
Background technique
Currently, communications band increasingly develops to high band.Compared to work in L, the antenna of S-band, work in Ku, Ka
The antenna requirement of wave band small, high gain, the characteristic of spot beam with size.Particularly, transmitting-receiving working frequency range distance farther out, needs
Antenna two-frequency operation is wanted, and needs circular polarization radiation.Can be realized in the prior art above-mentioned performance antenna mainly have it is following several
Kind antenna form, but all respectively have advantage and disadvantage:
1, Waveguide slot antenna, the form antenna on waveguide broadside or narrow side have cracks, the antenna usually have traveling wave,
Two kinds of array formats of standing wave.The gain in the antenna radiation unit gap is relatively low, usually only 7dB or so.Further, since should
Antenna is series feed form, will appear frequency in bandwidth and sweeps phenomenon, in this way, increasing with working frequency, machining accuracy
It asks also higher, need to be fabricated by higher welding procedure.Therefore the yield rate of this antenna is lower, higher cost, and realizes
The difficulty of double frequency round polarized Shared aperture radiation is larger.
2, micro-strip paster antenna, the form antenna is with profile is low, can integrate active device, radiating element and net can be achieved
The characteristics of network integrated design, but the dielectric loss of the antenna is larger, and there are leaky wave effect, antenna element gain is low, feeds
Via net loss is big, is unfavorable for realizing high-gain aerial design.
3, reflector antenna, the form antenna have good radio-frequency performance in Ka frequency range, differential loss is low, radiation efficiency is high,
Realize that the technology of circular polarization radiation is relatively simple, but the form antenna physical size is larger, is not suitable for some narrow spaces
Occasion.
4, lens antenna, the form antenna is similar with reflector antenna, generallys use feed irradiation medium ball, medium cake
Mode focuses wave beam, to realize the purpose of high-gain irradiation, still, which equally has antenna volume oversized
The problem of, it cannot achieve the function of wave beam adjustment.
Utility model content
The purpose of this utility model is that avoiding the shortcoming in above-mentioned background technique and providing a kind of conical horn day
Line, the antenna are double frequency round polarized radiation, have the characteristics that loss is low, radiation efficiency is high, isolation is high, compact-sized.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of conical-horn antenna comprising sequentially the conical horn mouth 1 of coaxial setting, cylindrical low frequency from top to bottom
Resonant cavity 2 and cylindrical high-frequency resonant cavity 3, the diameter of high-frequency resonant cavity 3 are less than the diameter of low-frequency resonant chamber 2；
First coupling slot 8 axially extending along resonant cavity being opposite to each other there are two being set in the cavity wall of low-frequency resonant chamber 2, often
First arcuate furrow 6 along resonant cavity circumferentially extending, two the first arcs are equipped at the coupling port of a first coupling slot 8
The extending direction of shape groove 6 is identical；It is set in the cavity wall of high-frequency resonant cavity 3 axially extending along resonant cavity there are two being opposite to each other
Second coupling slot 9 is equipped with a second arc ditch along resonant cavity circumferentially extending at the coupling port of each second coupling slot 9
The extending direction of slot 7, two the second arcuate furrows 7 is identical, the extending direction of the second arcuate furrow 7 and the first arcuate furrow 6
Extending direction is opposite；Plane determined by two the first coupling slots 8 is vertical with plane determined by two the second coupling slots 9；
It radially polarizes probe 4 inserted with low frequency in low-frequency resonant chamber 2, radially inserted with high frequency in high-frequency resonant cavity 3
Polarize probe 5, and plane determined by two the first coupling slots 8 and low frequency polarization probe 4 are in 45 degree of angles, high frequency polarized probe 5
It is in 90 degree of angles with low frequency polarization probe 4.
Specifically, the diameter of the low-frequency resonant chamber 2 is 0.5 λl, the groove width of first coupling slot 8 is 0.025 λl, slot
A length of 0.13 λl, the groove width of first arcuate furrow 6 is 0.03 λl, extension angle is 33 °, and low frequency polarization probe 4 is inserted into low frequency
Length in resonant cavity 2 is 0.22 λl, the distance of insertion position to the bottom of low-frequency resonant chamber 2 of low frequency polarization probe 4 is
0.17λl, the λlFor the center frequency wavelength of the corresponding low-frequency range of low-frequency resonant chamber 2.
Specifically, the diameter of the high-frequency resonant cavity 3 is 0.5 λh, the groove width of second coupling slot 9 is 0.025 λh, slot
A length of 0.13 λh, the groove width of second arcuate furrow 7 is 0.03 λh, extension angle is 33 °, and high frequency polarized probe 5 is inserted into high frequency
Length in resonant cavity 3 is 0.22 λh, the distance of bottom of the insertion position of high frequency polarized probe 5 to high-frequency resonant cavity 3 is
0.17λh, the λhFor the center frequency wavelength of the corresponding high band of high-frequency resonant cavity 3.
The utility model has the advantages that compared with the background art
1, the utility model includes low-frequency resonant chamber and high-frequency resonant cavity, is all had on low-frequency resonant chamber and high-frequency resonant cavity
Coupling slot and arcuate furrow, low-frequency resonant chamber and high-frequency resonant is intracavitary is inserted with probe, and the set-up mode of slot and probe is done
It is particularly limited to.The antenna of this structure has the characteristics that overall structure is simple and compact, radiation efficiency is high.
2, by the special setting to antenna structure parameter, the utility model antenna can realize that impedance bandwidth is greater than 20%, band
Gain is greater than 8.5dB in width, and radiation efficiency is greater than 75%, and the axial ratio bandwidth less than 3dB is greater than 25%, is greater than in port isolation bandwidth
30%, performance indicator is excellent.
3, this antenna is double frequency round polarized forms of radiation, can be used as planar array radiating element, realizes high efficiency narrow beam
Radiation.
Detailed description of the invention
Fig. 1 is the schematic perspective view of antenna in the utility model embodiment.
Fig. 2 is the top view of Fig. 1.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and detailed description.
As illustrated in fig. 1 and 2, a kind of conical-horn antenna comprising the sequentially conical horn mouth of coaxial setting from top to bottom
1, the diameter of the high-frequency resonant cavity 3 of cylindrical low-frequency resonant chamber 2 and cylinder, high-frequency resonant cavity 3 is less than low-frequency resonant chamber 2
Diameter；
First coupling slot 8 axially extending along resonant cavity being opposite to each other there are two being set in the cavity wall of low-frequency resonant chamber 2, often
First arcuate furrow 6 along resonant cavity circumferentially extending, two the first arcs are equipped at the coupling port of a first coupling slot 8
The extending direction of shape groove 6 is identical；It is set in the cavity wall of high-frequency resonant cavity 3 axially extending along resonant cavity there are two being opposite to each other
Second coupling slot 9 is equipped with a second arc ditch along resonant cavity circumferentially extending at the coupling port of each second coupling slot 9
The extending direction of slot 7, two the second arcuate furrows 7 is identical, the extending direction of the second arcuate furrow 7 and the first arcuate furrow 6
Extending direction is opposite；Plane determined by two the first coupling slots 8 is vertical with plane determined by two the second coupling slots 9；
It radially polarizes probe 4 inserted with low frequency in low-frequency resonant chamber 2, radially inserted with high frequency in high-frequency resonant cavity 3
Polarize probe 5, and plane determined by two the first coupling slots 8 and low frequency polarization probe 4 are in 45 degree of angles, high frequency polarized probe 5
It is in 90 degree of angles with low frequency polarization probe 4.
Specifically, the diameter of the low-frequency resonant chamber 2 is 0.5 λl, the groove width of first coupling slot 8 is 0.025 λl, slot
A length of 0.13 λl, the groove width of first arcuate furrow 6 is 0.03 λl, extension angle is 33 °, and low frequency polarization probe 4 is inserted into low frequency
Length in resonant cavity 2 is 0.22 λl, the distance of insertion position to the bottom of low-frequency resonant chamber 2 of low frequency polarization probe 4 is
0.17λl, the λlFor the center frequency wavelength of the corresponding low-frequency range of low-frequency resonant chamber 2.
Specifically, the diameter of the high-frequency resonant cavity 3 is 0.5 λh, the groove width of second coupling slot 9 is 0.025 λh, slot
A length of 0.13 λh, the groove width of second arcuate furrow 7 is 0.03 λh, extension angle is 33 °, and high frequency polarized probe 5 is inserted into high frequency
Length in resonant cavity 3 is 0.22 λh, the distance of bottom of the insertion position of high frequency polarized probe 5 to high-frequency resonant cavity 3 is
0.17λh, the λhFor the center frequency wavelength of the corresponding high band of high-frequency resonant cavity 3.
In above-described embodiment, conical horn mouth 1 is located at antenna top layer, and effect is reception/transmission of electromagnetic signals, and full
Sufficient spatial power wave cover requirement.In this example, conical horn is gradual change type, it is ensured that antenna fed resonant chamber and horn mouth
Impedance matching, usually take conical horn radiation port diameter be 0.9 λ0(λ0For center frequency corresponding wavelength).It both can get in this way
Relatively high unit radiation gain, preferably space impedance matching, and can avoid the array pattern when group battle array designs and occur
Higher graing lobe.The base diameter of conical horn is 0.55 λ0, ensure that the good transition with low-frequency resonant chamber 2, size are omited
Greater than the diameter dimension of low-frequency resonant chamber 2.
The diameter of low-frequency resonant chamber 2 usually takes 0.5 λl(λlFor the centre frequency of low-frequency range), on the circumference of low-frequency resonant chamber
It is provided with the first coupling slot, the width of the first coupling slot is 0.025 λl.The coupling port of first coupling slot is provided with the first arc
Groove, effect are to be radiated personal space in its intracavitary formation rotating field using probe excitation and just form circularly polarised wave.First
The width of arcuate furrow is 0.03 λl, extension angle is 33 °, and value is related to the diameter of low-frequency resonant chamber.
The diameter of high-frequency resonant cavity 3 usually takes 0.5 λh(λhFor the centre frequency of high band), the size of high-frequency resonant cavity is small
In the size of low-frequency resonant chamber, it is therefore an objective to be used in its intracavitary formation rotating field more higher than upper chamber body frequency, while by same
One conical horn mouth 1 is radiate.The provided circumferentially about of high-frequency resonant cavity has the second coupling slot, and the width of the second coupling slot is
0.025λh.The coupling port of second coupling slot is provided with the second arcuate furrow, and the width of the second arcuate furrow is 0.03 λh, extend
Angle is 33 °, and value is related to the diameter of high-frequency resonant cavity.
High frequency polarized probe and low frequency polarization probe are separately fixed on the resonant cavity side wall of two frequency ranges, for motivating phase
To the signal of frequency range.
By test, according to above-mentioned antenna structure dimensional configurations, bandwidth of the antenna axial ratio less than 2dB is 23.5%, antenna pole
Change interport isolation to be less than greater than 45% in -40dB bandwidth, the aperture radiation efficiency of two-band is greater than 75%.
The working principle of the utility model is as follows: when transmitting signal, transmitter connects coaxial switch and emits signal, low frequency
Respective frequencies have motivated rotating electric field in resonant cavity, form circular polarization radiation wave, are radiated free sky via conical horn mouth 1
Between；High frequency polarized probe 4 has motivated the high-frequency signal of high-frequency resonant cavity 3, via upper layer resonant cavity, finally by conical horn mouth
1 is radiated free space.
In short, the antenna is double frequency round polarized radiation, has the characteristics that simple and compact structure, radiation efficiency are high, can make
For planar array radiating element, the radiation of high efficiency narrow beam is realized.
Claims (3)
1. a kind of conical-horn antenna, which is characterized in that conical horn mouth (1), circle including sequentially coaxial setting from top to bottom
The diameter of the high-frequency resonant cavity (3) of cylindrical low-frequency resonant chamber (2) and cylinder, high-frequency resonant cavity (3) is less than low-frequency resonant chamber
(2) diameter；
First coupling slot (8) axially extending along resonant cavity being opposite to each other there are two being set in the cavity wall of low-frequency resonant chamber (2), often
It is equipped with first arcuate furrow (6) along resonant cavity circumferentially extending at the coupling port of a first coupling slot (8), two the
The extending direction of one arcuate furrow (6) is identical；Set that there are two be opposite to each other along resonant cavity axis in the cavity wall of high-frequency resonant cavity (3)
To the second coupling slot (9) of extension, it is equipped with one at the coupling port of each second coupling slot (9) and is circumferentially extended along resonant cavity
The second arcuate furrow (7), the extending direction of two the second arcuate furrows (7) is identical, the extending direction of the second arcuate furrow (7)
It is opposite with the extending direction of the first arcuate furrow (6)；Plane determined by two the first coupling slots (8) and two the second coupling slots
(9) plane determined by is vertical；
It radially polarizes probe (4) inserted with low frequency in low-frequency resonant chamber (2), radially inserted with height in high-frequency resonant cavity (3)
Frequency polarized probe (5), plane determined by two the first coupling slots (8) and low frequency polarization probe (4) are in 45 degree of angles, high frequency pole
Change probe (5) and low frequency polarization probe (4) is in 90 degree of angles.
2. conical-horn antenna according to claim 1, which is characterized in that the diameter of the low-frequency resonant chamber (2) is 0.5
λl, the groove width of first coupling slot (8) is 0.025 λl, flute length is 0.13 λl, the groove width of first arcuate furrow (6) is
0.03λl, extension angle is 33 °, and the length in low frequency polarization probe (4) insertion low-frequency resonant chamber (2) is 0.22 λl, low frequency polarization
The distance of the insertion position of probe (4) to the bottom of low-frequency resonant chamber (2) is 0.17 λl, the λlIt is corresponding for low-frequency resonant chamber (2)
The center frequency wavelength of low-frequency range.
3. conical-horn antenna according to claim 1, which is characterized in that the diameter of the high-frequency resonant cavity (3) is 0.5
λh, the groove width of second coupling slot (9) is 0.025 λh, flute length is 0.13 λh, the groove width of second arcuate furrow (7) is
0.03λh, extension angle is 33 °, and the length in high frequency polarized probe (5) insertion high-frequency resonant cavity (3) is 0.22 λh, high frequency polarized
The distance of the insertion position of probe (5) to the bottom of high-frequency resonant cavity (3) is 0.17 λh, the λhIt is corresponding for high-frequency resonant cavity (3)
The center frequency wavelength of high band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920249774.6U CN209217213U (en) | 2019-02-27 | 2019-02-27 | A kind of conical-horn antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920249774.6U CN209217213U (en) | 2019-02-27 | 2019-02-27 | A kind of conical-horn antenna |
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| Publication Number | Publication Date |
|---|---|
| CN209217213U true CN209217213U (en) | 2019-08-06 |
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ID=67467973
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920249774.6U Active CN209217213U (en) | 2019-02-27 | 2019-02-27 | A kind of conical-horn antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672022A (en) * | 2019-02-27 | 2019-04-23 | 中国电子科技集团公司第五十四研究所 | A kind of conical-horn antenna |
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2019
- 2019-02-27 CN CN201920249774.6U patent/CN209217213U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672022A (en) * | 2019-02-27 | 2019-04-23 | 中国电子科技集团公司第五十四研究所 | A kind of conical-horn antenna |
| CN109672022B (en) * | 2019-02-27 | 2024-04-09 | 中国电子科技集团公司第五十四研究所 | Conical horn antenna |
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