CN108400439A - A kind of dual-band dual-polarized planar slot antenna of W-shaped terminal - Google Patents
A kind of dual-band dual-polarized planar slot antenna of W-shaped terminal Download PDFInfo
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- CN108400439A CN108400439A CN201810363916.1A CN201810363916A CN108400439A CN 108400439 A CN108400439 A CN 108400439A CN 201810363916 A CN201810363916 A CN 201810363916A CN 108400439 A CN108400439 A CN 108400439A
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- 239000000758 substrate Substances 0.000 claims abstract description 69
- 230000010287 polarization Effects 0.000 claims abstract description 30
- 230000009977 dual effect Effects 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 6
- 230000007306 turnover Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 7
- 238000005388 cross polarization Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 description 14
- 238000009826 distribution Methods 0.000 description 8
- 238000011160 research Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
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Classifications
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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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/206—Microstrip transmission line antennas
-
- 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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
Abstract
The invention discloses a kind of W-shaped dual-band dual-polarized planar slot antennas of terminal, are made of medium substrate, the W-shaped feed terminal being printed on medium substrate front, coplanar waveguide feeder line, the wide gap floor of rectangle, the upper minor matters for being printed on the medium substrate back side, left minor matters, right minor matters, microstrip line and external coaxial fitting (5), coaxial fitting (6).By L-shaped and V-arrangement, cleverly configuration can make antenna generate dual-band characteristic to W-shaped feed terminal, dual-band characteristic may be implemented by the combination of each minor matters in the medium substrate back side, the interport isolation that antenna can be improved can generate two kinds of orthogonal modes to realize dual polarization by the two kinds of feeding classification combinations of co-planar waveguide and microstrip line.The antenna is planar structure, and the size of antenna is only 30 × 30mm, and size is small, section is low, and dual polarization characteristic is realized in two working bands, and the isolation between two ports is preferable, and cross polarization is small, is suitable for small sized double frequency band dual polarization wireless communication system.
Description
Technical field
The present invention relates to radio antenna technical fields, and in particular to a kind of W-shaped dual-band dual-polarized plane suture of terminal
Gap antenna, is suitable for WiMAX 3.5GHz (3.3-3.7GHz) and WLAN 5GHz (5.15GHz~5.825GHz) frequency band is small-sized more
Frequency band dual polarization wireless communication system.
Background technology
With the fast development of wireless communication technique, it is desirable that the antenna in wireless terminal can be simultaneously in multiple frequency band works
Make, to make multiband antenna become the hot spot of current research.Traditional multi-band antenna is with antenna miniaturization and covering more multiplexing
It is target to make frequency range, and under new requirement drive, multiband antenna develops to multifunctional direction.Dual polarized antenna technology is to improve
The effective means of wireless communication system channel capacity, therefore, dual polarized antenna application range compared with linear polarized antenna are wider
It is general.Multiband antenna can cover multiple working bands with an antenna, realize the function of mutiple antennas, small-sized integrated to reach
The target of change.Therefore, realize that multiband antenna polarization diversity is one non-on the basis of traditional linear polarization multiband antenna
Often important research direction.Multiband antenna can not only solve the problems, such as that mutiple antennas interfered with each other, but also can save space, increase
Adding system integrated level, the main implementation method of multiband antenna is to increase additional resonance structure at present, is increased by introducing minor matters
The new resonant path of antenna, to realize multi-frequency Characteristic, such as the different structure of I shapes, T shapes, G shapes, L-shaped can be realized
Multiband function；The higher order resonances mould of antenna can be introduced and change the basic mode of antenna by improving antenna structure, generate new resonance
Frequency band；Multi-band equally may be implemented using multiple-layered patches structure, generally excited by an active patch, in active patch
Lower layer or upper layer increase additional patches coupling and realize multi-frequency Characteristic.Studies have shown that slot antenna, paster antenna, dipole antenna,
Loop antenna etc. can realize dual polarization function.Non-patent literature 1 discloses a kind of gap load multiband paster antenna, medium
Substrate top radiation patch is a circular patch for being provided with arc shaped slits, and intermediate medium is foam, and foam lower surface is metal
Floor structure, there is one layer of circular capacitor fed patch among two layer medium, Antenna Operation in GPS1.575GHz and
WiFi2.45GHz, but design size is bigger than normal.Non-patent literature 2 discloses a kind of dual-band and dual-polarization dielectric resonator antenna, by medium
Substrate and Rectangular Enclosure with Participating Media resonator composition, medium substrate top are dielectric resonator, and lower part is feeding network, is presented by dual-port
Electricity, antenna realize dual polarization in two frequency ranges of PCS (1.83~1.99GHz) and WiMAX (2.58~2.63GHz), although should
The interport isolation of antenna is higher, but the antenna causes volume larger using dielectric resonator, is unfavorable for the integrated of antenna.It is non-special
Sharp document 3 discloses a kind of double broadband electromagnetical dipole antennas of the dual polarization of the differential driving with orthogonal feed structure, by the double-deck U
Type electric dipole, short-circuit wall, biorthogonal bilayer feed structure and a horn reflector composition, antenna low-frequency range bandwidth of operation are
0.78~1.01GHz is 1.69~2.69GHz in high band operation bandwidth, can be obtained more than 30dB in entire working frequency range
Interport isolation, but the size of the antenna be 206 × 166 × 88mm3, the volume of antenna is still larger, and structure is complex,
It can not apply in integrated circuits.Therefore, a kind of dual-band and dual-polarization day compact-sized, section is low, interport isolation is high is designed
Line has a good application prospect.
Citation list
Non-patent literature 1：Chen Jianling, multiband Multi-polarization microstrip patch antenna research, Beijing Jiaotong University's doctorate
Paper, 2016:39-46.
Non-patent literature 2：Handsome Xiang, the design and research of multi-polarization antenna, University of Electronic Science and Technology Ph.D. Dissertation,
2017:81-84.
Non-patent literature 3：Horse great waves, the multiple frequency broad band antenna research in wireless communication system, Beijing University of Post ＆ Telecommunication doctor
Academic dissertation, 2015:81-97.
Invention content
The object of the present invention is to provide a kind of W-shaped dual-band dual-polarized planar slot antennas of terminal, in two working frequency range
Interior realization dual polarization characteristic, size is small, section is low, compact-sized, interport isolation is high, convenient for being integrated in radio circuit, together
When meet the needs of 3.5GHzWiMAX, 5GHzWLAN frequency range are to working band.
The technical scheme is that：A kind of dual-band dual-polarized planar slot antenna of W-shaped terminal, by medium substrate (1),
It is printed on W-shaped feed terminal (2) on medium substrate (1) front, coplanar waveguide feeder line (3), the wide gap floor (4) of rectangle, print
It makes in the upper minor matters (8) at medium substrate (1) back side, left minor matters (9), right minor matters (10), microstrip line (11) and external coaxially connects
Head (5), coaxial fitting (6) are constituted, it is characterised in that：
A. the W-shaped feed terminal (2) is W-shaped metal patch, and W-shaped metal patch is symmetrical with day by two L-shaped minor matters
Line central axes combined crosswise forms, and is connected with coplanar waveguide feeder line (3) by a V-arrangement minor matters, the vertex of V-arrangement minor matters is located at
On the central axes of antenna and the central axes both sides of antenna are symmetrical with, are intersected with two L-shaped minor matters, V-arrangement minor matters and L-shaped minor matters
Turning angle is all 90 degree, and by L-shaped and V-arrangement, cleverly configuration can make antenna generate double frequency-band spy to W-shaped feed terminal (2)
Property；
B. the coplanar waveguide feeder line (3) is the rectangle conduction band that one section of characteristic impedance is 50 Ω, coplanar waveguide feeder line (3)
Upper end be connected with the V-arrangement minor matters vertex in W-shaped feed terminal (2), the external coaxial fitting in lower end of coplanar waveguide feeder line (3)
(5)；
C. the wide gap floor (4) of rectangle is made of rectangle floor, connection conduction band, and rectangle floor is located at medium substrate
(1) lower end is symmetrical with coplanar waveguide feeder line (4) both sides, the connection conduction band that rectangle floor passes through medium substrate (1) both sides and top
The wide gap of rectangle (7) that closure is formed after connection, can make antenna structure more compact, to reduce the design size of antenna,
Connection conduction band lower edge in wide gap floor (4) upper end of rectangle opens a N shape slots, improves antenna in low-frequency range by N shape slots
Impedance matching property；
D. the coaxial fitting (6) is located on the central shaft of medium substrate (1) lower end, coaxial fitting (6) respectively with it is coplanar
Waveguide feeder (4) is connected with two lower edges of L-shaped floor (5)；
E. described medium substrate (1) back side is printed on minor matters (8), left minor matters (9), right minor matters (10), microstrip line (11),
Upper minor matters (8) are located at the top of microstrip line (11), and direction is towards right side, and left minor matters (9) are located on the left of microstrip line (11), right minor matters
(10) it is located on the right side of microstrip line (11), upper minor matters (8), left minor matters (9), right minor matters (10) are fed by microstrip line (11), micro-strip
Line (11) is located on the left of medium substrate (1), and microstrip line (11) lower end is connected with coaxial fitting (6), passes through the combination of each minor matters
It realizes dual-band characteristic, the interport isolation of antenna can be improved；
F. the positive surface antenna of medium substrate passes through feed microstrip line, both feeds by coplanar wave guide feedback, back side antenna
Mode, which can combine, generates two kinds of orthogonal modes, to realize dual polarization.
The W-shaped feed terminal (2) is W-shaped metal patch, L-shaped minor matters bond length L therein7For 5.1mm~
5.8mm, long side length L9For 8mm~12mm, width W4For 1mm~1.6mm, L-shaped minor matters turning point is following away from medium substrate (1)
Edge distance L2For 6mm~8mm, away from antenna central axes distance W3For 4mm~6mm, V-arrangement minor matters length L8It is wide for 5.5mm~7.5mm
Degree is consistent with L-shaped minor matters, and V-arrangement minor matters turning point is located on antenna central axes, away from medium substrate (1) lower edge distance L1For
9mm~10.5mm.
The rectangle conduction band length L that characteristic impedance in the coplanar waveguide feeder line (3) is 50 Ω3It is wide for 9mm~11mm
Spend W2For 2.6mm~3.2mm.
The wide gap floor (4) of the rectangle is made of rectangle floor, connection conduction band, rectangle floor width W1For 12mm~
14mm, length L4For 6.1mm~6.7mm, wide gap floor (4) the both sides connection conduction band width W of rectangle5It is long for 2.8mm~3.2mm
Spend L6For 15.3mm~16.2mm, wide gap floor (4) the upper end connection conduction band N shape slot groove widths W of rectangle7For 25mm~27mm, N shapes
The long L in slot both ends10For 3.5mm~3.9mm.
Described medium substrate (1) back side is printed on minor matters (8), left minor matters (9), right minor matters (10), microstrip line (11), respectively
The width W of minor matters and microstrip line (11)10For 1.2mm~1.6mm, microstrip line (11) is away from the distance W on the right side of medium substrate (1)8For
23mm~25mm, the long W of upper minor matters (8)12For 7mm~9mm, upper distance L of the minor matters (8) away from medium substrate (1) lower end14+L15+W10
For 11mm~14mm, left minor matters (9) length W11For 4mm~5mm, left distance L of the minor matters (9) away from medium substrate (1) lower end14For
6mm~9mm, right minor matters (10) length W9For 14mm~16mm, right distance L of the minor matters (10) away from medium substrate (1) lower end13For
2.5mm~4.5mm.
Effect of the invention is that：The present invention devises a kind of dual-band dual-polarized plane suture of W-shaped terminal of structure novel
Gap antenna, by L-shaped and V-arrangement, cleverly configuration can make antenna generate dual-band characteristic, the medium substrate back side to W-shaped feed terminal
Dual-band characteristic may be implemented by the combination of each minor matters, the interport isolation of antenna, the positive surface antenna of medium substrate can be improved
By coplanar wave guide feedback, back side antenna can generate two kinds of orthogonal modes by feed microstrip line, the combination of both feeding classifications
Formula, to realize dual polarization, the connection conduction band lower edge in rectangle wide gap floor upper end, which opens a N shape slots, improves antenna in low frequency
The impedance matching property of section.The rectangle of closure is formed after the connection conduction band connection that the wide gap floor of rectangle passes through medium substrate top
Wide gap can make antenna structure more compact, to reduce the design size of antenna.The antenna is planar structure, the ruler of antenna
It is very little be only 30 × 30mm, size is small, section is low, and dual polarization characteristic is realized in two working bands, between two ports every
Preferable from degree, the common working frequency range in two ports of antenna is 3.15GHz~3.78GHz, low-frequency range interport isolation in low frequency
More than 25dB, 3.5GHzWiMAX frequency bands are covered, are 5.12GHz~5.94GHz in high frequency, high band interport isolation is more than
23dB covers 5GHzWLAN frequency bands, and antenna is good in the radiation characteristic and gain characteristic of each frequency range, and cross polarization is small, is applicable in
In small sized double frequency band dual polarization wireless communication system.
Description of the drawings
Fig. 1 is the positive structure schematic of the embodiment of the present invention.
Fig. 2 is the structure schematic diagram of the embodiment of the present invention.
Fig. 3 is in low frequency 3.5GHz, Surface current distribution of embodiment of the present invention when being fed by coaxial fitting (5).
Fig. 4 is in low frequency 3.5GHz, Surface current distribution of embodiment of the present invention when being fed by coaxial fitting (6).
Fig. 5 is in low frequency 5.5GHz, Surface current distribution of embodiment of the present invention when being fed by coaxial fitting (5).
Fig. 6 is in low frequency 5.5GHz, Surface current distribution of embodiment of the present invention when being fed by coaxial fitting (6).
Fig. 7 is artificial reflections coefficient S curve of the embodiment of the present invention.
Fig. 8 is actual measurement reflectance factor S curve of the embodiment of the present invention
Fig. 9 is the E surface radiations direction when frequency is 3.5GHz when the embodiment of the present invention is fed by coaxial fitting (5)
Figure.
Figure 10 is the H surface radiations direction when frequency is 3.5GHz when the embodiment of the present invention is fed by coaxial fitting (5)
Figure.
Figure 11 is the E surface radiations direction when frequency is 5.5GHz when the embodiment of the present invention is fed by coaxial fitting (5)
Figure.
Figure 12 is the H surface radiations direction when frequency is 5.5GHz when the embodiment of the present invention is fed by coaxial fitting (5)
Figure.
Figure 13 is the E surface radiations direction when frequency is 3.5GHz when the embodiment of the present invention is fed by coaxial fitting (6)
Figure.
Figure 14 is the H surface radiations direction when frequency is 3.5GHz when the embodiment of the present invention is fed by coaxial fitting (6)
Figure.
Figure 15 is the E surface radiations direction when frequency is 5.5GHz when the embodiment of the present invention is fed by coaxial fitting (6)
Figure.
Figure 16 is the H surface radiations direction when frequency is 5.5GHz when the embodiment of the present invention is fed by coaxial fitting (6)
Figure.
Figure 17 is the peak gain figure of different frequency point in two working frequency range of the embodiment of the present invention.
Specific implementation mode
The present invention specific implementation mode be：As shown in Figure 1, a kind of dual-band dual-polarized planar slot antenna of W-shaped terminal,
It is wide by medium substrate (1), the W-shaped feed terminal (2) being printed on medium substrate (1) front, coplanar waveguide feeder line (3), rectangle
Gap floor (4), the upper minor matters (8) for being printed on medium substrate (1) back side, left minor matters (9), right minor matters (10), microstrip line (11)
It is constituted with external coaxial fitting (5), coaxial fitting (6), it is characterised in that：The W-shaped feed terminal (2) is W-shaped metal
Patch, W-shaped metal patch are symmetrical with antenna central axes combined crosswise by two L-shaped minor matters and form, together by a V-arrangement minor matters
Face waveguide feeder (3) is connected, and the vertex of V-arrangement minor matters is located on the central axes of antenna and is symmetrical with the central axes both sides of antenna,
It intersects with two L-shaped minor matters, V-arrangement minor matters and the turning angle of L-shaped minor matters are all 90 degree, and W-shaped feed terminal (2) passes through L-shaped
Cleverly configuration can make antenna generate dual-band characteristic with V-arrangement；The coplanar waveguide feeder line (3) is that one section of characteristic impedance is
The rectangle conduction band of 50 Ω, the upper end of coplanar waveguide feeder line (3) are connected with the V-arrangement minor matters vertex in W-shaped feed terminal (2), altogether
The external coaxial fitting in lower end (5) of face waveguide feeder (3)；The wide gap floor (4) of the rectangle is by rectangle floor, connection conduction band
Composition, rectangle floor is located at medium substrate (1) lower end, is symmetrical with coplanar waveguide feeder line (4) both sides, rectangle floor passes through medium base
The wide gap of rectangle (7) that closure is formed after the connection of the connection conduction band on plate (1) both sides and top, can make antenna structure more tight
It gathers, to reduce the design size of antenna, the connection conduction band lower edge in wide gap floor (4) upper end of rectangle opens a N shape slots, leads to
Cross N shape slots improve antenna low-frequency range impedance matching property；The coaxial fitting (6) is located in medium substrate (1) lower end
In mandrel, coaxial fitting (6) is connected with two lower edges of coplanar waveguide feeder line (4) and L-shaped floor (5) respectively；Described
Medium substrate (1) back side is printed on minor matters (8), left minor matters (9), right minor matters (10), microstrip line (11), and upper minor matters (8) are located at micro-
Top with line (11), towards right side, left minor matters (9) are located on the left of microstrip line (11) in direction, and right minor matters (10) are located at microstrip line
(11) right side, upper minor matters (8), left minor matters (9), right minor matters (10) are fed by microstrip line (11), and microstrip line (11) is located at medium
On the left of substrate (1), microstrip line (11) lower end is connected with coaxial fitting (6), and dual-band characteristic is realized by the combination of each minor matters,
The interport isolation of antenna can be improved；The positive surface antenna of medium substrate passes through microstrip line by coplanar wave guide feedback, back side antenna
Feed, the combination of both feeding classifications can generate two kinds of orthogonal modes, to realize dual polarization.
The W-shaped feed terminal (2) is W-shaped metal patch, L-shaped minor matters bond length L therein7For 5.1mm~
5.8mm, long side length L9For 8mm~12mm, width W4For 1mm~1.6mm, L-shaped minor matters turning point is following away from medium substrate (1)
Edge distance L2For 6mm~8mm, away from antenna central axes distance W3For 4mm~6mm, V-arrangement minor matters length L8It is wide for 5.5mm~7.5mm
Degree is consistent with L-shaped minor matters, and V-arrangement minor matters turning point is located on antenna central axes, away from medium substrate (1) lower edge distance L1For
9mm~10.5mm.
The rectangle conduction band length L that characteristic impedance in the coplanar waveguide feeder line (3) is 50 Ω3It is wide for 9mm~11mm
Spend W2For 2.6mm~3.2mm.
The wide gap floor (4) of the rectangle is made of rectangle floor, connection conduction band, rectangle floor width W1For 12mm~
14mm, length L4For 6.1mm~6.7mm, wide gap floor (4) the both sides connection conduction band width W of rectangle5It is long for 2.8mm~3.2mm
Spend L6For 15.3mm~16.2mm, wide gap floor (4) the upper end connection conduction band N shape slot groove widths W of rectangle7For 25mm~27mm, N shapes
The long L in slot both ends10For 3.5mm~3.9mm.
Described medium substrate (1) back side is printed on minor matters (8), left minor matters (9), right minor matters (10), microstrip line (11), respectively
The width W of minor matters and microstrip line (11)10For 1.2mm~1.6mm, microstrip line (11) is away from the distance W on the right side of medium substrate (1)8For
23mm~25mm, the long W of upper minor matters (8)12For 7mm~9mm, upper distance L of the minor matters (8) away from medium substrate (1) lower end14+L15+W10
For 11mm~14mm, left minor matters (9) length W11For 4mm~5mm, left distance L of the minor matters (9) away from medium substrate (1) lower end14For
6mm~9mm, right minor matters (10) length W9For 14mm~16mm, right distance L of the minor matters (10) away from medium substrate (1) lower end13For
2.5mm~4.5mm.
Embodiment：Specific manufacturing process is as described in embodiment.Select FR4 epoxy resin medium substrates, permittivity εr
=4.6, loss tangent 0.02, thickness h=1.6mm, metal layer thickness 0.04mm, coaxial fitting is using standard sub-miniature A connector.
The long L=30mm of medium substrate, width W=30mm.It is wide that W-shaped feed terminal, coplanar waveguide feeder line, rectangle are printed in medium substrate front
Gap floor, W-shaped feed terminal are W-shaped metal patch, and W-shaped metal patch is symmetrical with antenna central axes by two L-shaped minor matters and hands over
Fork is composed, and is connected with coplanar waveguide feeder line by a V-arrangement minor matters, and by L-shaped, cleverly configuration can make day with V-arrangement
Line generates dual-band characteristic, passes through the optimization analysis to antenna size, L-shaped minor matters bond length L7For 5.4mm, long side length L9
For 10mm, width W4For 1.2mm, L-shaped minor matters turning point is away from medium substrate lower edge distance L2For 7mm, away from antenna central axes distance
W3For 5mm, V-arrangement minor matters length L8For 6.5mm, width is consistent with L-shaped minor matters, and V-arrangement minor matters turning point is located at antenna central axes
On, away from medium substrate lower edge distance L1For 9.8mm.The rectangle conduction band length that characteristic impedance in coplanar waveguide feeder line is 50 Ω
L3For 10mm, width W2For 2.8mm.The wide gap floor of rectangle is made of rectangle floor, connection conduction band, rectangle floor width W1For
13mm, length L4For 6.5mm, rectangle wide gap floor both sides connect conduction band width W5For 3mm, length L6For 15.7mm, rectangle is wide
Gap floor upper end connects conduction band N shape slot groove widths W7For 26mm, the N shape slots long L in both ends10For 3.7mm.On the wide gap floor of rectangle
The connection conduction band lower edge at end open a N shape slots improve antenna low-frequency range impedance matching property.It is printed at the medium substrate back side
Upper minor matters, left minor matters, right minor matters, microstrip line realize dual-band characteristic, the width of each minor matters and microstrip line by the combination of each minor matters
Spend W10For 1.4mm, microstrip line is away from the distance W on the right side of medium substrate8For 23.6mm, the upper long W of minor matters12For 8mm, upper minor matters are away from medium
The distance L of substrate lower end14+L15+W10For 13mm, left minor matters length W11For 4.5mm, distance of the left minor matters away from medium substrate lower end
L14For 7mm, right minor matters length W9For 15mm, distance L of the right minor matters away from medium substrate lower end13For 3.5mm.Medium substrate front day
Line is by coplanar wave guide feedback, and for back side antenna by feed microstrip line, both feeding classifications can generate two kinds of orthogonal modes
To realize dual polarization.The wide gap floor of rectangle and co-planar waveguide are coplanar, when being fed by coaxial fitting (5), in coplanar wave
Leading inside can encourage the vertical polarization pattern of antenna can inside co-planar waveguide when being fed by coaxial fitting (6)
The horizontal polarization pattern of antenna is encouraged.
In low frequency 3.5GHz, antenna surface current distribution is as shown in figure 3, from figure when being fed by coaxial fitting (5)
As can be seen that electric current flows to the wide gap floor surrounding of rectangle from co-planar waveguide, rectangle wide gap floor both sides extend conduction band and power on
Stream direction is identical, extends the current direction of conduction band on the contrary, therefore, can be encouraged inside co-planar waveguide on rectangle floor and upper end
Play the vertical polarization pattern of antenna.Antenna surface current distribution is as shown in figure 4, can from figure when being fed by coaxial fitting (6)
To find out, electric current is transmitted to co-planar waveguide from microstrip line, then the wide gap floor surrounding of rectangle, rectangle are transmitted to from co-planar waveguide
Wide gap floor both sides extend current direction on conduction band on the contrary, extending the basic phase of current direction of conduction band on rectangle floor and upper end
Together, therefore, the horizontal polarization pattern of antenna can have been encouraged inside co-planar waveguide.In low frequency, surface current is wide in rectangle
The N shapes slot of the connection conduction band lower edge of gap floor upper end nearby collects, and illustrates that N shapes slot is deposited to improving low-frequency impedance matching properties
Centainly contributing.
In high frequency 5.5GHz, antenna surface current distribution is as shown in figure 5, from figure when being fed by coaxial fitting (5)
As can be seen that electric current flows to the wide gap floor surrounding of rectangle from co-planar waveguide, then rectangle is flowed to from the wide gap floor surrounding of rectangle
Among wide gap, the direction of an electric field in the wide gap of rectangle is substantially vertical direction, therefore, can be encouraged inside co-planar waveguide
Play the vertical polarization pattern of antenna.Antenna surface current distribution is as shown in fig. 6, can from figure when being fed by coaxial fitting (6)
To find out, electric current is transmitted to co-planar waveguide from microstrip line, is transmitted to the wide gap floor surrounding of rectangle from co-planar waveguide, then from square
The wide gap floor surrounding of shape is transmitted among the wide gap of rectangle, and the direction of an electric field in the wide gap of rectangle is substantially horizontal direction,
Therefore, the horizontal polarization pattern of antenna can have been encouraged inside co-planar waveguide.
The reflectance factor of antenna, reflectance factor S are tested using vector network analyzer11With frequency variation simulation result such as
Shown in Fig. 7, test results are shown in figure 8, when the antenna simulated is fed by coaxial fitting (5), reflectance factor S11Less than-
The impedance bandwidth of 10dB is 2.98GHz~4.52GHz in low-frequency range, is 5.11GHz~6.02GHz in high band, antenna passes through
When coaxial fitting (6) is fed, reflectance factor S22Impedance bandwidth less than -10dB is 3.18GHz~3.72GHz in low-frequency range,
High band is 4.92GHz~5.89GHz.When the antenna tested out is fed by coaxial fitting (5), reflectance factor S11Less than-
The impedance bandwidth of 10dB is 2.92GHz~4.58GHz in low-frequency range, is 5.12GHz~6.15GHz in high band, antenna passes through
When coaxial fitting (6) is fed, reflectance factor S22Impedance bandwidth less than -10dB is 3.15GHz~3.78GHz in low-frequency range,
High band is 4.98GHz~5.94GHz.Measured result is consistent substantially with simulation result, and measured result is deposited with simulation result
It is that manual welding feed section introduces certain loss in the reason of slight error, dielectric-slab relative dielectric constant, which exists, to be missed
Difference and test environment generate certain influence to measurement result.The common working frequency range in two ports of antenna of test is in low frequency
For 3.15GHz~3.78GHz, low-frequency range interport isolation is more than 25dB, covers 3.5GHzWiMAX (3.3GHz~3.7GHz)
Frequency band is 5.12GHz~5.94GHz in high frequency, and high band interport isolation is more than 23dB, covers 5GHzWLAN (5.15GHz
~5.825GHz) frequency band.
To antenna respectively by coaxial fitting (5) and coaxial fitting (6) feed at two Frequency points of 3.5GHz, 5.5GHz
The faces E and H surface radiation directional diagrams tested, examine the radiation characteristic of antenna, actual measurement directional diagram such as Fig. 9, Figure 10, Figure 11, figure
12, shown in Figure 13, Figure 14, Figure 15, Figure 16.It can be seen from the figure that when being fed by coaxial fitting (5), vertical polarization is
Main polarization, horizontal polarization is cross polarization, and when being fed by coaxial fitting (6), vertical polarization is cross polarization, horizontal polarization
It is main polarization, radiation pattern is in the faces the E approximation figure of eight, in the faces H directional diagram approximation omnidirectional.Therefore, the antenna is at two
It is omnidirectional in frequency range, radiation characteristic is relatively stable, and the lobe of antenna is wider, and cross polarization is smaller, and it is double to embody double frequency-band
Polarization characteristic, while there is preferable omni-directional, WiMAX and WLAN frequency range small capacity double multi-band wireless communications system can be met simultaneously
The demand of system.
The peak gain curve for testing antenna different frequency point in two working bands, as shown in figure 17, in frequency band model
The interior several sampled points of selection are enclosed, test result shows that the surface current density of antenna is also different when feed port difference, because
This can also cause each band antenna peak gain variation range different.When being fed by coaxial fitting (5), 2.92GHz~
In 4.58GHz frequency ranges, the variation range of peak antenna gain is 3.16dBi~4.22dBi, in 5.12GHz~6.15GHz
In frequency range, the variation range of peak gain is 4.78dBi~5.42dBi, when being fed by coaxial fitting (6),
In 3.15GHz~3.78GHz frequency ranges, the variation range of peak antenna gain is 2.93dBi~3.50dBi, in 4.98GHz
In~5.94GHz frequency ranges, the variation range of peak gain is 4.55dBi~5.12dBi, peak antenna gain variation range
It is more stable, illustrate that antenna has good electrical property, while there is good gain performance in working frequency range.
Claims (5)
1. a kind of dual-band dual-polarized planar slot antenna of W-shaped terminal by medium substrate (1), is printed on medium substrate (1) front
On W-shaped feed terminal (2), coplanar waveguide feeder line (3), the wide gap floor (4) of rectangle, be printed on medium substrate (1) back side
Upper minor matters (8), left minor matters (9), right minor matters (10), microstrip line (11) and external coaxial fitting (5), coaxial fitting (6) are constituted,
It is characterized in that：
A. the W-shaped feed terminal (2) is W-shaped metal patch, and W-shaped metal patch is symmetrical with by two L-shaped minor matters in antenna
Axis Cross is composed, and is connected with coplanar waveguide feeder line (3) by a V-arrangement minor matters, the vertex of V-arrangement minor matters is located at antenna
Central axes on and be symmetrical with the central axes both sides of antenna, intersect with two L-shaped minor matters, the turnover of V-arrangement minor matters and L-shaped minor matters
Angle is all 90 degree, and by L-shaped and V-arrangement, cleverly configuration can make antenna generate dual-band characteristic to W-shaped feed terminal (2)；
B. the coplanar waveguide feeder line (3) is the rectangle conduction band that one section of characteristic impedance is 50 Ω, coplanar waveguide feeder line (3) it is upper
End is connected with the V-arrangement minor matters vertex in W-shaped feed terminal (2), the external coaxial fitting in lower end (5) of coplanar waveguide feeder line (3)；
C. the wide gap floor (4) of rectangle is made of rectangle floor, connection conduction band, and rectangle floor is located at medium substrate (1)
Lower end, is symmetrical with coplanar waveguide feeder line (4) both sides, and rectangle floor is connected by the connection conduction band on medium substrate (1) both sides and top
The wide gap of rectangle (7) that closure is formed after connecing, can make antenna structure more compact, to reduce the design size of antenna,
The connection conduction band lower edge of wide gap floor (4) upper end of rectangle opens a N shape slots, improves resistance of the antenna in low-frequency range by N shape slots
Anti- matching properties；
D. the coaxial fitting (6) is located on the central shaft of medium substrate (1) lower end, coaxial fitting (6) respectively with co-planar waveguide
Feeder line (4) is connected with two lower edges of L-shaped floor (5)；
E. described medium substrate (1) back side is printed on minor matters (8), left minor matters (9), right minor matters (10), microstrip line (11), upper branch
Section (8) is located at the top of microstrip line (11), and direction is towards right side, and left minor matters (9) are located on the left of microstrip line (11), right minor matters (10) position
On the right side of microstrip line (11), upper minor matters (8), left minor matters (9), right minor matters (10) are fed by microstrip line (11), microstrip line (11)
On the left of medium substrate (1), microstrip line (11) lower end is connected with coaxial fitting (6), is realized by the combination of each minor matters double
Frequency bandwidth characteristics can improve the interport isolation of antenna；
F. the positive surface antenna of medium substrate is by coplanar wave guide feedback, medium substrate back side antenna by feed microstrip line, both
Feeding classification combination can generate two kinds of orthogonal modes, to realize dual polarization.
2. a kind of W-shaped dual-band dual-polarized planar slot antenna of terminal according to claim 1, it is characterised in that described
W-shaped feed terminal (2) is W-shaped metal patch, L-shaped minor matters bond length L therein7For 5.1mm~5.8mm, long side length L9For
8mm~12mm, width W4For 1mm~1.6mm, L-shaped minor matters turning point is away from medium substrate (1) lower edge distance L2For 6mm~8mm,
Away from antenna central axes distance W3For 4mm~6mm, V-arrangement minor matters length L8For 5.5mm~7.5mm, width keeps one with L-shaped minor matters
It causes, V-arrangement minor matters turning point is located on antenna central axes, away from medium substrate (1) lower edge distance L1For 9mm~10.5mm.
3. a kind of W-shaped dual-band dual-polarized planar slot antenna of terminal according to claim 1, it is characterised in that described
The rectangle conduction band length L that characteristic impedance in coplanar waveguide feeder line (3) is 50 Ω3For 9mm~11mm, width W2For 2.6mm~
3.2mm。
4. a kind of W-shaped dual-band dual-polarized planar slot antenna of terminal according to claim 1, it is characterised in that described
The wide gap floor (4) of rectangle is made of rectangle floor, connection conduction band, rectangle floor width W1For 12mm~14mm, length L4For
6.1mm~6.7mm, wide gap floor (4) the both sides connection conduction band width W of rectangle5For 2.8mm~3.2mm, length L6For 15.3mm
~16.2mm, wide gap floor (4) the upper end connection conduction band N shape slot groove widths W of rectangle7For 25mm~27mm, the N shape slots long L in both ends10For
3.5mm~3.9mm.
5. a kind of W-shaped dual-band dual-polarized planar slot antenna of terminal according to claim 1, it is characterised in that described
Medium substrate (1) back side is printed on minor matters (8), left minor matters (9), right minor matters (10), microstrip line (11), each minor matters and microstrip line
(11) width W10For 1.2mm~1.6mm, microstrip line (11) is away from the distance W on the right side of medium substrate (1)8For 23mm~25mm, on
Minor matters (8) long W12For 7mm~9mm, upper distance L of the minor matters (8) away from medium substrate (1) lower end14+L15+W10For 11mm~14mm,
Left minor matters (9) length W11For 4mm~5mm, left distance L of the minor matters (9) away from medium substrate (1) lower end14For 6mm~9mm, right branch
Save (10) length W9For 14mm~16mm, right distance L of the minor matters (10) away from medium substrate (1) lower end13For 2.5mm~4.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810363916.1A CN108400439B (en) | 2018-04-22 | W-shaped terminal dual-band dual-polarized planar slot antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810363916.1A CN108400439B (en) | 2018-04-22 | W-shaped terminal dual-band dual-polarized planar slot antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN108400439A true CN108400439A (en) | 2018-08-14 |
| CN108400439B CN108400439B (en) | 2024-04-19 |
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| CN110311217A (en) * | 2019-06-28 | 2019-10-08 | 华东师范大学 | A kind of high gain slot figuration Log Periodic Array Antenna of coplanar wave guide feedback |
| CN110581356A (en) * | 2019-09-12 | 2019-12-17 | 天津大学 | Novel coplanar waveguide dual-frequency antenna |
| CN110943290A (en) * | 2019-12-17 | 2020-03-31 | 上海隧道工程股份有限公司 | Underground communication coplanar waveguide feed broadband microstrip antenna |
| CN112400255A (en) * | 2019-04-24 | 2021-02-23 | 株式会社村田制作所 | Antenna module and communication device having the same mounted thereon |
| CN115064868A (en) * | 2022-07-06 | 2022-09-16 | 杭州电子科技大学 | Dual-polarized crossed dipole transparent antenna |
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