CN207517872U - A kind of broadband circle polarized slot antenna - Google Patents
A kind of broadband circle polarized slot antenna Download PDFInfo
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- CN207517872U CN207517872U CN201721459264.9U CN201721459264U CN207517872U CN 207517872 U CN207517872 U CN 207517872U CN 201721459264 U CN201721459264 U CN 201721459264U CN 207517872 U CN207517872 U CN 207517872U
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Abstract
The utility model discloses a kind of broadband circle polarized slot antenna, including coaxial line, first medium substrate and second medium substrate；The upper surface of the first medium substrate is equipped with disc structure, and the upper surface of the second medium substrate is equipped with sequence phase-shift structure, and the lower surface of second medium substrate is equipped with four radiating slots fed by sequence phase-shift structure；The inner wire of the coaxial line is connect across second medium substrate with the starting point of sequence phase-shift structure, and is connect across first medium substrate with disc structure, and the outer conductor of coaxial line is connect with the lower surface of second medium substrate.The utility model realizes good circular polarization characteristics, has the advantages that design is simple, small, at low cost, characteristic is good, can solve the problem of that the narrow axis ratio characteristic of existing micro-strip circular polarized antenna frequency band is bad.
Description
Technical field
The utility model is related to a kind of slot antenna, especially a kind of broadband circle polarized slot antenna belongs to wireless mobile
Field of communication technology.
Background technology
With the development of modern communication technology, simple linear polarization is difficult to meet communicating requirement.Circular polarized antenna has can
Receive the incoming wave of arbitrary polarization mode, and its radiated wave can also go out the antenna of arbitrary polarization mode and receive, and have rotation direction orthogonality, energy
The advantages that sexual intercourse interference and anti-multipath is enough inhibited to reflect.Due to superior function of the circular polarized antenna in modern communications, by people
More and more concerns.Angularly consider that often it is expected can be only from portability, economy, reduction RCS and EMC characteristics
The function of multiple antenna is obtained using common antenna, and circular polarized antenna has stronger antijamming capability, thus transceiver
The research significance of dual circularly polarized antenna is very great.
Micro-strip circular polarized antenna is wide due to the advantages of combining both microstrip antenna and circular polarized antenna and characteristic
It is general to be applied to wireless application, such as:It is the satellite communications such as measurement, communication, satellite, space flight, global positioning system and RFID system, distant
Control, the development of telemetry.For circular polarization microstrip antenna while with series of advantages, there is also some shortcomings, circular polarisation
For microstrip antenna due to narrower bandwidth, relative bandwidth generally only has 0.7%-7%, thus receives in practical applications certain
Limitation.
According to investigations with understanding, disclosed prior art is as follows：
It is delivered at " Electric Letters " within 2000, H.Evans, P.Gale, B.Aljibouri et al. entitled
“Application of simulated annealing to design of serial feed sequentially
In the article of 2 × 2antenna of rotated array ", using four port feeding networks of sequence phase shift, by rationally setting
Amplitude and phase difference between port respectively feed four square patch in plane, so as to form 2 × 2 entelechy
Change aerial array.However the design and without broadband circle polarized performance, axial ratio bandwidth 1.7%, impedance bandwidth (VSWR≤2)
It is 9.8%.Radiating element is using square patch antenna simultaneously, and to cause each unit radiation circularly polarised wave, therefore every
A port also separates two-way excitation patch, increases the area of structure in this way, does not meet the integrated requirement of antenna.
Utility model content
The purpose of this utility model is to provide for a kind of broadband circle polarized slot antenna, which realizes good circle
Polarization characteristic has the advantages that design is simple, small, at low cost, characteristic is good, can solve existing micro-strip circular polarized antenna frequency
With the problem of narrow, axis ratio characteristic is bad.
The purpose of this utility model can be reached by adopting the following technical scheme that：
A kind of broadband circle polarized slot antenna, including coaxial line, first medium substrate and second medium substrate；Described first
The upper surface of medium substrate is equipped with disc structure, and the upper surface of the second medium substrate is equipped with sequence phase-shift structure, and second is situated between
The lower surface of matter substrate is equipped with four radiating slots fed by sequence phase-shift structure；The inner wire of the coaxial line passes through
Second medium substrate is connect with the starting point of sequence phase-shift structure, and is connect across first medium substrate with disc structure, coaxial line
Outer conductor connect with the lower surface of second medium substrate.
Further, the sequence phase-shift structure includes sequentially connected 90 degree of sequence phase shift sections, 180 degree sequence phase shift
Partly, 270 degree of sequence phase shift sections and 360 degree of sequence phase shift sections, 90 degree of sequence phase shift sections, 180 degree sequence phase shift section,
270 degree of sequence phase shift sections and 360 degree of sequence phase shift sections respectively feed four radiating slots.
Further, the upper surface of the second medium substrate is additionally provided with four phase shift matching minor matters, four phase shift matchings
Minor matters respectively with 90 degree of sequence phase shift sections, 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and 360 degree of sequence phase shifts
Part connects.
Further, four phase shifts matching minor matters include rectangle part and two L-shaped parts, rectangle part, its
In L-shaped part and another L-shaped part be sequentially connected, and width broadens successively.
Further, four phase shifts matching minor matters are in a center of symmetry about the center of second medium upper surface of base plate.
Further, 90 degree of sequence phase shift sections, 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and
360 degree of sequence phase shift sections are arcuate structure, and of different size.
Further, 90 degree of sequence phase shift sections, 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and
The width of 360 degree of sequence phase shift sections narrows successively.
Further, four radiating slots are L-shaped structure.
Further, the T-shaped gap of four radiating slots loading minor matters shape.
Further, four radiating slots are in a center of symmetry about the center of second medium base lower surface.
The utility model has following advantageous effect relative to the prior art：
1st, the broadband circle polarized slot antenna of the utility model is provided with two layer medium substrate, wherein one layer of medium substrate
Upper surface be equipped with sequence phase-shift structure, lower surface is set there are four radiating slot, sequence phase-shift structure as feeding network, point
It is other that four gaps are fed, that is, four radiating slots are encouraged, so as to form circularly polarised wave radiation, realize broader 3dB
Axial ratio bandwidth and impedance bandwidth；Meanwhile the upper surface of another layer of medium substrate is equipped with disc structure, can be adjusted by disc structure
The impedance matching of antenna is saved, to realize broader impedance bandwidth, so that the impedance bandwidth and axial ratio bandwidth of antenna being capable of phases
Mutually matching.
2nd, in the broadband circle polarized slot antenna of the utility model, sequence phase-shift structure includes sequentially connected 90 degree sequences
Phase shift section, 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and 360 degree of sequence phase shift sections, can form four tunnels
Amplitude output signal is equal, and phase sequence differs 90 degree of port.
3rd, in the broadband circle polarized slot antenna of the utility model, four radiating slots are L-shaped structure, each radiating slot
The T-shaped gap of gap loading minor matters shape, can reach broader 3dB axis than relative bandwidth, and with low axis ratio characteristic.
4th, the broadband circle polarized slot antenna of the utility model shows by simulation result in 1.43GHz~1.83GHz frequencies
In segment limit, axis ratio is both less than 3dB, and the axial ratio bandwidth of relative bandwidth 24.5%, especially below 1.5dB is 1.46Ghz-
1.55GHz and 1.69Ghz-1.79GHz, relative bandwidth have reached 12.2%, realize good low axis ratio characteristic.
Description of the drawings
Fig. 1 is the coaxial line of the broadband circle polarized slot antenna of the utility model embodiment 1 and first medium substrate, second
The stereogram of medium substrate connection.
Fig. 2 is the broadband circle polarized slot antenna front view of the utility model embodiment 1
Fig. 3 is the broadband circle polarized slot antenna vertical view of the utility model embodiment 1.
Structures of the Fig. 4 for first medium upper surface of base plate in the broadband circle polarized slot antenna of the utility model embodiment 1
Figure.
Fig. 5 is second medium upper surface of base plate sequence phase in the broadband circle polarized slot antenna of the utility model embodiment 1
Move the schematic diagram of structure.
Fig. 6 is second medium base lower surface T shapes gap in the broadband circle polarized slot antenna of the utility model embodiment 1
Structure chart.
Fig. 7 is the simulation result curve graph of the broadband circle polarized slot antenna S parameter of the utility model embodiment 1.
Fig. 8 is the simulation result curve graph of the broadband circle polarized slot antenna AR of the utility model embodiment 1.
Wherein, 1- coaxial lines, 2- first medium substrates, 3- second medium substrates, 4- disc structures, 5- sequence phase shift knots
Structure, 501- the first sequence phase shift sections, 502- the second sequence phase shift sections, 503- third sequence phase shift sections, 504- the 4th are suitable
Sequence phase shift section, the first phase shifts of 6- matching minor matters, the first rectangle parts of 601-, the first L-shaped of 602- part, the second L-shaped of 603- portion
Point, the second phase shifts of 7- matching minor matters, the second rectangle parts of 701-, 702- third L-shaped part, the 4th L-shaped parts of 703-, 8- thirds
Phase shift matches minor matters, 801- third rectangle parts, the 5th L-shaped parts of 802-, the 6th L-shaped parts of 803-, the 4th phase shifts of 9- matching
Minor matters, the 4th rectangle parts of 901-, the 7th L-shaped parts of 902-, the 8th L-shaped parts of 903-, the first T shapes gaps of 10-, the 2nd T of 11-
Shape gap, the 3rd T shapes gaps of 12-, the 4th T shapes gaps of 13-.
Specific embodiment
The utility model is described in further detail with reference to embodiment and attached drawing, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment 1：
As shown in FIG. 1 to 3, a kind of broadband circle polarized slot antenna is present embodiments provided, which includes coaxial line
1st, first medium substrate 2 and second medium substrate 3.
The first medium substrate 2 and second medium substrate 3 are using pcb board, and shape is identical, and dielectric constant is
4.4, loss angle 0.02, processing technology is ripe, and at low cost, high yield rate, manufacturing process is simple, and the first of the present embodiment is situated between
Matter substrate 2 is located at the top of second medium substrate 3, and the projection of first medium substrate 2 and second medium substrate 3 can be in horizontal plane
Upper coincidence.
As shown in Figure 3 and Figure 4, the upper surface of the first medium substrate 2 is equipped with disc structure 4, which is print
Make the circular metal patch in 2 upper surface of first medium substrate, the center of circle and 2 upper surface of first medium substrate of disc structure 4
Center overlaps, and the impedance matching of antenna can be adjusted by the disc structure 4, to realize broader impedance bandwidth, so that
The impedance bandwidth and axial ratio bandwidth of antenna can be mutually matched.
As shown in Figure 3, Figure 5 and Figure 6, the upper surface of the second medium substrate 3 is equipped with sequence phase-shift structure 5, the sequence
Phase-shift structure 5 is the metal patch for being printed on 3 upper surface of second medium substrate, and the starting point of sequence phase-shift structure 5 is located at second and is situated between
The upper surface center of matter substrate 3, as feeding network, including sequentially connected the 501, second sequence of first sequence phase shift section
Phase shift section 502, third sequence phase shift section 503 and the 4th sequence phase shift section 504, from fig. 5, it is seen that the first sequence
Phase shift section 501, the second sequence phase shift section 502, third sequence phase shift section 503 and the 4th sequence phase shift section 504 are
Arcuate structure, respectively as 90 degree, 180 degree, 270 degree and 360 degree of sequence phase shift sections, and the width of each sequence phase shift section
Degree is different, it is preferable that width narrows successively, you can equal to form four road amplitude output signals, phase sequence differs 90 degree
Port；Correspondingly, the lower surface covering metal of second medium substrate 3, etches four radiating slots on the metal of lower surface, point
Not Wei the first radiating slot, the second radiating slot, third radiating slot and the 4th radiating slot, the first radiating slot, the second spoke
It is L-shaped structure to penetrate gap, third radiating slot and the 4th radiating slot；First sequence phase shift section 501 is to the first radiating slot
Gap is fed, and the second sequence phase shift section 502 feeds the second radiating slot, and third sequence phase shift section 503 is to
Three radiating slots are fed, and the 4th sequence phase shift section 504 feeds the 4th radiating slot, so as to form circularly polarised wave
Radiation encourages four radiating slots using sequence phase-shift structure 5, realizes broader 3dB axial ratio bandwidths and impedance bandwidth.
Further, the upper surface of the second medium substrate 3 is additionally provided with four phase shift matching minor matters, four phase shift matchings
Minor matters are also to be printed on the metal patch of 3 upper surface of second medium substrate, respectively the first phase shift matching minor matters 6, the second phase shift
Minor matters 7, third phase shift matching minor matters 8 and the 4th phase shift matching minor matters 9 are matched, from fig. 5, it is seen that the first phase shift matches branch
Section the 6, second phase shift matching minor matters 7, third phase shift matching minor matters 8 and the 4th phase shift matching minor matters 9 are ladder-type structure, four
Phase shift matching minor matters can match minor matters by any phase shift and rotate to obtain about the center of 3 upper surface of second medium substrate, i.e., four
Phase shift matching minor matters are in a center of symmetry about the center of 3 upper surface of second medium substrate；First phase shift matching minor matters 6 are included successively
The first rectangle part 601, the first L-shaped part 602 and the second L-shaped part 603 of connection, wherein the width of the first rectangle part 601
Degree is most narrow, and the width of the first L-shaped part 602 is medium, and the width of the second L-shaped part 603 is maximum, that is to say, that the first rectangle part
601st, the width of the first L-shaped part 602 and the second L-shaped part 603 broadens successively, and the first phase shift matches minor matters 6 especially by the
One rectangle part 601 is connect with the first sequence phase shift section 501, and passes through 603 output signal of the second L-shaped part as the first radiation
Gap is fed；Second phase shift matching minor matters 7 include sequentially connected second rectangle part 701,702 and of third L-shaped part
4th L-shaped part 703, similarly, the width of the second rectangle part 701, third L-shaped part 702 and the 4th L-shaped part 703 according to
Secondary to broaden, the second phase shift matching minor matters 7 are connect, and lead to especially by the second rectangle part 701 with the second sequence phase shift section 502
703 output signal of the 4th L-shaped part is crossed to be fed for the second radiating slot；Third phase shift matching minor matters 8 include being sequentially connected
Third rectangle part 801, the 5th L-shaped part 802 and the 6th L-shaped part 803, similarly, third rectangle part 801, the 5th L
The width of 802 and the 6th L-shaped part 803 of shape part broadens successively, and third phase shift matches minor matters 8 especially by third rectangle part
801 connect with third sequence phase shift section 503, and pass through 803 output signal of the 6th L-shaped part and presented for third radiating slot
Electricity；4th phase shift matching minor matters 9 include sequentially connected 4th rectangle part 901, the 7th L-shaped part 902 and the 8th L-shaped part
903, similarly, the 4th rectangle part 901, the 7th L-shaped part 902 and the width of the 8th L-shaped part 903 broaden successively, and the 4th
Phase shift matching minor matters 9 are connect, and pass through the 8th L-shaped portion especially by the 4th rectangle part 901 with the 4th sequence phase shift section 504
903 output signals is divided to be fed for the 4th radiating slot.
Further, it can see from Fig. 1, Fig. 3 and Fig. 6, the first radiating slot can also load the first minor matters, tool
Body loads the first minor matters in two gaps junction of the first radiating slot, forms the first T shapes gap 10；Second radiating slot is also
The second minor matters can be loaded, specifically load the first minor matters in two gaps junction of the second radiating slot, form the 2nd T shapes seam
Gap 11；Third radiating slot can also load third minor matters, specifically in two articles of gaps junction of third radiating slot loading the
Three minor matters form the 3rd T shapes gap 12；4th radiating slot can also load the 4th minor matters, specifically in the 4th radiating slot
Two articles of gaps junction loads the 4th minor matters, forms the 4th T shapes gap 13, and four T shapes gaps can be by any T shapes gap about the
The center of 3 lower surface of second medium substrate rotates to obtain, i.e. four T shapes gaps about 3 lower surface of second medium substrate center into
Central symmetry；Using T shape gap structures, broader 3dB axis can be reached than relative bandwidth, and with low axis ratio characteristic.
The coaxial line 1 have inner wire and outer conductor, a diameter of 0.92mm of inner wire, outer conductor it is a diameter of
3.5mm, inner wire first pass through second medium substrate 3 and are connect with the starting point of sequence phase-shift structure 5, i.e., with second medium substrate 3
The center connection of upper surface, then passes through first medium substrate 2 and is connect with disc structure 4, specifically with the center of circle of disc structure 4
Connection is put, i.e. the center with 2 upper surface of first medium substrate is connect, and outer conductor is connect with the lower surface of second medium substrate 3；Together
The bottom end of axis 1 is directly connect with SMA.
After the dimensional parameters for adjusting broadband circle polarized slot antenna each section of the present embodiment, imitated by calculating with electromagnetic field
Very, verification emulation has been carried out to the broadband circle polarized slot antenna based on sequence phase-shift structure of the present embodiment, as shown in fig. 7,
Give the curve of S parameter simulation result of the antenna in 1.3Ghz~1.9Ghz frequency ranges；It can be seen that
In 1.42GHz~1.9GHz band limits, the value of S11 is both less than -10dB；As shown in figure 8, give the antenna 1.4Ghz~
The curve of AR simulation results in 1.9Ghz frequency ranges, it can be seen that in 1.43GHz~1.83GHz band limits, dB
The value of (AxialRatio Value, axis ratio) is both less than 3dB, the axis ratio of relative bandwidth 24.5%, especially below 1.5dB
Bandwidth is 1.46Ghz-1.55GHz and 1.69Ghz-1.79GHz, and relative bandwidth has reached 12.2%, realizes good low axis
Ratio characteristic；Simulation result shows that the broadband circle polarized slot antenna of the present embodiment has preferable low axis ratio characteristic, and impedance band
Width can cover axial ratio bandwidth.
In above-described embodiment, the pcb board is formed using FR4-epoxy materials；It is the coaxial line 1, disc structure 4, suitable
Sequence phase-shift structure 5, the first phase shift matching minor matters 6, the second phase shift matching minor matters 7, third phase shift matching minor matters 8, the 4th phase shift
With the metal that minor matters 9 use for aluminium, iron, tin, copper, silver, gold and platinum any one or be aluminium, iron, tin, copper, silver, gold and platinum
The alloy of any one.
In conclusion the broadband circle polarized slot antenna of the utility model be provided with two layer medium substrate, one layer wherein
The upper surface of medium substrate is equipped with sequence phase-shift structure, and lower surface is set there are four radiating slot, and sequence phase-shift structure is used as feed
Network respectively feeds four gaps, that is, encourages four radiating slots, so as to form circularly polarised wave radiation, realizes
Broader 3dB axial ratio bandwidths and impedance bandwidth；Meanwhile the upper surface of another layer of medium substrate is equipped with disc structure, passes through disk
Structure can adjust the impedance matching of antenna, to realize broader impedance bandwidth, so that the impedance bandwidth of antenna and axis ratio
Bandwidth can be mutually matched.
The above, only the utility model patent preferred embodiment, but the protection domain of the utility model patent is simultaneously
Not limited to this, any one skilled in the art is in the range disclosed in the utility model patent, according to this
Technical solution and its utility model design of utility model patent are subject to equivalent substitution or change, belong to the utility model patent
Protection domain.
Claims (10)
1. a kind of broadband circle polarized slot antenna, it is characterised in that：Including coaxial line, first medium substrate and second medium base
Plate；The upper surface of the first medium substrate is equipped with disc structure, and the upper surface of the second medium substrate is equipped with sequence phase shift
Structure, the lower surface of second medium substrate are equipped with four radiating slots fed by sequence phase-shift structure；The coaxial line
Inner wire connect across second medium substrate with the starting point of sequence phase-shift structure, and across first medium substrate and disc structure
Connection, the outer conductor of coaxial line are connect with the lower surface of second medium substrate.
2. a kind of broadband circle polarized slot antenna according to claim 1, it is characterised in that：The sequence phase-shift structure packet
Include sequentially connected 90 degree of sequence phase shift sections, 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and 360 degree of sequence phases
Move part, 90 degree of sequence phase shift sections, 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and 360 degree of sequence phase shift portions
Divide and four radiating slots are fed respectively.
3. a kind of broadband circle polarized slot antenna according to claim 2, it is characterised in that：The second medium substrate
Upper surface is additionally provided with four phase shifts matching minor matters, four phase shifts matching minor matters respectively with 90 degree of sequence phase shift sections, 180 degree sequence
Phase shift section, 270 degree of sequence phase shift sections are connected with 360 degree of sequence phase shift sections.
4. a kind of broadband circle polarized slot antenna according to claim 3, it is characterised in that：Four phase shifts match branch
Section includes rectangle part and two L-shaped parts, and rectangle part, one of L-shaped part and another L-shaped part connect successively
It connects, and width broadens successively.
5. a kind of broadband circle polarized slot antenna according to claim 3, it is characterised in that：Four phase shifts match branch
It saves in a center of symmetry about the center of second medium upper surface of base plate.
6. according to a kind of broadband circle polarized slot antenna of claim 2-5 any one of them, it is characterised in that：Described 90 degree suitable
Sequence phase shift section, 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and 360 degree of sequence phase shift sections are arc knot
Structure, and it is of different size.
7. a kind of broadband circle polarized slot antenna according to claim 6, it is characterised in that：90 degree of sequence phase shifts portion
Point, the width of 180 degree sequence phase shift section, 270 degree of sequence phase shift sections and 360 degree of sequence phase shift sections narrows successively.
8. a kind of broadband circle polarized slot antenna according to claim 1, it is characterised in that：Four radiating slots are equal
For L-shaped structure.
9. a kind of broadband circle polarized slot antenna according to claim 8, it is characterised in that：Four radiating slots add
Carry the T-shaped gap of minor matters shape.
10. a kind of broadband circle polarized slot antenna according to claim 8 or claim 9, it is characterised in that：Four radiating slots
Gap is in a center of symmetry about the center of second medium base lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721459264.9U CN207517872U (en) | 2017-11-06 | 2017-11-06 | A kind of broadband circle polarized slot antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721459264.9U CN207517872U (en) | 2017-11-06 | 2017-11-06 | A kind of broadband circle polarized slot antenna |
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| CN207517872U true CN207517872U (en) | 2018-06-19 |
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| CN201721459264.9U Active CN207517872U (en) | 2017-11-06 | 2017-11-06 | A kind of broadband circle polarized slot antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834184A (en) * | 2017-11-06 | 2018-03-23 | 华南理工大学 | A kind of broadband circle polarized slot antenna |
| CN111262027A (en) * | 2020-02-10 | 2020-06-09 | 南京邮电大学 | Miniaturized broadband quadrature feed network |
| CN113013640A (en) * | 2021-03-04 | 2021-06-22 | 西安电子科技大学 | Low RCS high-gain circularly polarized array antenna based on polarization conversion super-surface |
-
2017
- 2017-11-06 CN CN201721459264.9U patent/CN207517872U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834184A (en) * | 2017-11-06 | 2018-03-23 | 华南理工大学 | A kind of broadband circle polarized slot antenna |
| CN107834184B (en) * | 2017-11-06 | 2023-12-29 | 华南理工大学 | Broadband circularly polarized slot antenna |
| CN111262027A (en) * | 2020-02-10 | 2020-06-09 | 南京邮电大学 | Miniaturized broadband quadrature feed network |
| CN113013640A (en) * | 2021-03-04 | 2021-06-22 | 西安电子科技大学 | Low RCS high-gain circularly polarized array antenna based on polarization conversion super-surface |
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