CN105742821A - Capacitor-loaded stepped impedance type tri-polarization half-slot antenna - Google Patents
Capacitor-loaded stepped impedance type tri-polarization half-slot antenna Download PDFInfo
- Publication number
- CN105742821A CN105742821A CN201610216310.6A CN201610216310A CN105742821A CN 105742821 A CN105742821 A CN 105742821A CN 201610216310 A CN201610216310 A CN 201610216310A CN 105742821 A CN105742821 A CN 105742821A
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- rabbet joint
- line
- antenna
- frequency
- radiation
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- 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
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- 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
- H01Q5/10—Resonant 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
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- Waveguide Aerials (AREA)
Abstract
The invention discloses a capacitor-loaded stepped impedance type tri-polarization half-slot antenna, and relates to a slot antenna. The antenna comprises three perpendicularly-placed single-polarized antennas (13), wherein each antenna (13) comprises a dielectric substrate (1), and a metal ground (2) and a radiation slot slit (3) on the dielectric substrate (1), and a microstrip feeder line (4); the radiation slot slit (3) is formed in the metal ground (2); one end of the radiation slot slit (3) is in short circuit while the other end (6) of the radiation slot slit is in open circuit; a low resistance slot slit (8), which is formed by multiple parallel capacitors (7) that are bridged on the edge of the radiation slot slit (3), is formed in the part, close to the open circuit end, of the radiation slot slit (3); a high resistance slot slit (9) is formed in the rest part of the radiation slot slit (3); and an antenna port (10) is formed in one end of the microstrip feeder line (4) while the other end of the microstrip feeder line (4) is in open circuit, and crosses over the high resistance slot slit (9) and extends for a certain length. The antenna is in multi-band operation, so that the antenna dimensions, and the conditions of crossed polarization and shielding can be reduced, and isolation among ports can be improved.
Description
Technical field
The present invention relates to a kind of slot antenna, three polarization half slot antennas of especially a kind of capacitive load Stepped Impedance.
Background technology
Slot antenna is the antithesis antenna of element antenna, has a wide range of applications.But, common slot antenna not only radiates the length of the line of rabbet joint itself 1/2nd wavelength, and radiate and also need to bigger Metal ground around the line of rabbet joint and amass, big 1/2nd wavelength of length of the length ratio line of rabbet joint on usual metal ground, big 1/2nd wavelength of width of the width ratio line of rabbet joint on metal ground.Multipolarization MIMO can effectively improve spectrum efficiency and channel capacity, in order to MIMO technology may apply to the terminal that volume is little, it is necessary to the not like-polarized co-located placement of antenna.The radiation of antenna can be produced occlusion effect by bigger metal ground, slot antenna is made to be not suitable for co-located multiple-input and multiple-output (MIMO) application, when using in particular as multi-polarization antenna, the isolation caused between the cross polarization variation of antenna, antenna port is deteriorated by big metal ground, and these all will cause the decline of spectrum efficiency and channel capacity.The impedance of the line of rabbet joint is very big simultaneously, and the impedance matching also making slot antenna feeding transmission line is relatively difficult.The simultaneously development of modern communications also requires that antenna can multiband operation and two frequency bands can regulate respectively.
Summary of the invention
Technical problem: the purpose of the present invention is to propose to the three of a kind of capacitive load Stepped Impedance polarization half slot antenna, this antenna has been possible not only to multiple working band, and multiple frequency band can regulate respectively；This antenna can reduce the length of the radiation line of rabbet joint and the area on metal ground, and have and suppress cross polarization, improvement to isolate, reduce the effect blocked.
Technical scheme: three polarization half slot antennas of the capacitive load Stepped Impedance of the present invention include the capacitive load Stepped Impedance antenna of three single polarizations being mutually perpendicular to placement；The metal that the capacitive load Stepped Impedance antenna of each single polarization includes medium substrate, be arranged on medium substrate and the radiation line of rabbet joint, microstrip feed line；The one side of medium substrate is metal ground, and the another side of medium substrate is the conduction band of microstrip feed line；Metal has the radiation line of rabbet joint on the ground, and the shape of the radiation line of rabbet joint is rectangle, and the radiation line of rabbet joint is positioned at the center on metal ground；The short at one end of the radiation line of rabbet joint, the other end is opened a way；At the radiation line of rabbet joint near open end part, several Capacitance parallel connection is had to be connected across two edges of the radiation line of rabbet joint so that the radiation line of rabbet joint, near the characteristic impedance step-down of open end part, forms the low-resistance line of rabbet joint；The remainder of the radiation line of rabbet joint is the high resistant line of rabbet joint, and the high resistant line of rabbet joint constitutes the Stepped Impedance radiation line of rabbet joint together with the low-resistance line of rabbet joint, produces a relatively low low frequency operation frequency band of frequency and the higher high-frequency work frequency band of a frequency；Also being the ground plane of described microstrip feed line, one end of microstrip feed line is the port of antenna metal, and the other end of the conduction band of microstrip feed line strides across the high resistant line of rabbet joint and stretches a segment length to terminal, the open-end of microstrip feed line；The conduction band of microstrip feed line has two parts to constitute, and Part I conduction band is the position just having crossed over the high resistant line of rabbet joint from the port of antenna to it, and the remainder of the conduction band of microstrip feed line is Part II conduction band.
Change the thickness of medium substrate, pcrmeability and dielectric constant, the high resistant line of rabbet joint and the characteristic impedance of the low-resistance line of rabbet joint can be changed, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Change the length of the low-resistance line of rabbet joint, low-resistance line of rabbet joint position in the radiation line of rabbet joint, the electrical length of the radiation line of rabbet joint can be regulated, to realize antenna miniaturization in various degree, it is also possible to change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Change Part II conduction band length and width, thus it is possible to vary the operating frequency of antenna, working band width and radiation the line of rabbet joint electrical length.
Change the quantity of loading capacitance, capacitance and spacing, it is possible to regulate the characteristic impedance of the low-resistance line of rabbet joint, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Change the width of the radiation line of rabbet joint, it is possible to regulate the characteristic impedance of the low-resistance line of rabbet joint and the high resistant line of rabbet joint, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Capacitance parallel connection is loaded into two edges of the radiation line of rabbet joint, the characteristic impedance not only making line of rabbet joint transmission line is reduced to and is prone to and feeding transmission lines matching volume, but also reducing the phase velocity of line of rabbet joint transmission line so that the length of the half-wavelength radiation line of rabbet joint reduces, it is achieved the miniaturization of the radiation line of rabbet joint and then antenna.The operating frequency of low frequency operation frequency band and the operating frequency of high-frequency work frequency band of three polarization half slot antennas of capacitive load Stepped Impedance are mainly determined by the resonant frequency of the radiation line of rabbet joint, but the operating frequency of antenna and matching degree can also be adjusted by the length and width that the size on metal ground, microstrip feed line conduction band are in the radiation position of the line of rabbet joint, Part II conduction band.Owing to the radiation existing low-resistance line of rabbet joint of the line of rabbet joint has again the high resistant line of rabbet joint, constitute the radiation line of rabbet joint of Stepped Impedance, not only make antenna miniaturization, reduce cross polarization, also reduce the size on metal ground, improve isolation and reduce the occlusion effect on metal ground, and it is also possible that antenna has multiple working band, and change relative length and the impedance of the low-resistance line of rabbet joint and the high resistant line of rabbet joint, it is possible to adjust the position of two working bands respectively.Owing to the radiation line of rabbet joint 3 is quarter-wave resonance structure, more half as large than the radiation slot length of 1/2nd wavelength of usual two terminal shortcircuits, therefore the overall dimensions of antenna also reduces accordingly, and occlusion effect reduces further.
Beneficial effect: three polarization half slot antennas of the capacitive load Stepped Impedance of the present invention provide the benefit that, this antenna can reduce the electric size of whole antenna, realize miniaturization, this antenna has been possible not only to multiple frequency band simultaneously, and multiple frequency band can regulate respectively, also there is the cross polarization of suppression antenna, improve and isolate between port, and reduce the effect blocked on metal ground.
Accompanying drawing explanation
Fig. 1 is three polarization half slot antenna overall structure schematic diagrams of capacitive load Stepped Impedance
Fig. 2 be capacitive load Stepped Impedance three polarization half slot antennas in the structural representation of capacitive load Stepped Impedance antenna of single polarization.
Figure has: the capacitive load Stepped Impedance antenna 13 of medium substrate 1, metal ground 2, the radiation line of rabbet joint 3, microstrip feed line 4, conduction band 5, the other end 6, electric capacity 7, the low-resistance line of rabbet joint 8, the high resistant line of rabbet joint 9, port 10, Part I conduction band 11, Part II conduction band 12 and single polarization.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment of the present invention is: three polarization half slot antennas of capacitive load Stepped Impedance include the capacitive load Stepped Impedance antenna 13 of three single polarizations being mutually perpendicular to placement；The capacitive load Stepped Impedance antenna 13 of each single polarization includes medium substrate 1, be arranged on medium substrate 1 metal ground 2 and the radiation line of rabbet joint 3, microstrip feed line 4；The one side of medium substrate 1 is metal ground 2, and the another side of medium substrate 1 is the conduction band 5 of microstrip feed line 4；Having the radiation line of rabbet joint 3 on metal ground 2, the shape of the radiation line of rabbet joint 3 is rectangle, and the radiation line of rabbet joint 3 is positioned at the center on metal ground 2；The short at one end of the radiation line of rabbet joint 3, the other end 6 is opened a way；At the radiation line of rabbet joint 3 near open end part, several electric capacity (7) is had to be connected in parallel across two edges of the radiation line of rabbet joint 3 so that the radiation line of rabbet joint 3, near the characteristic impedance step-down of open end part, forms the low-resistance line of rabbet joint 8；The remainder of the radiation line of rabbet joint 7 is the high resistant line of rabbet joint 9, and the high resistant line of rabbet joint 9 constitutes Stepped Impedance together with the low-resistance line of rabbet joint 8 and radiates the line of rabbet joint 3, produces a relatively low low frequency operation frequency band of frequency and the higher high-frequency work frequency band of a frequency；Metal ground 2 is also the ground plane of described microstrip feed line 4, and one end of microstrip feed line 4 is the port 10 of antenna, and the other end of the conduction band 5 of microstrip feed line 4 strides across the high resistant line of rabbet joint 9 and stretches a segment length to terminal, the open-end of microstrip feed line 4；The conduction band 5 of microstrip feed line has two parts to constitute, and Part I conduction band 11 is the position just having crossed over the high resistant line of rabbet joint 9 from the port 10 of antenna to it, and the remainder of the conduction band of microstrip feed line is Part II conduction band 12.
Change the thickness of medium substrate 1, pcrmeability and dielectric constant, the high resistant line of rabbet joint 9 and the characteristic impedance of the low-resistance line of rabbet joint 8 can be changed, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Change the length of the low-resistance line of rabbet joint 8, the low-resistance line of rabbet joint 8 position in the radiation line of rabbet joint 3, the electrical length of the radiation line of rabbet joint 3 can be regulated, to realize antenna miniaturization in various degree, it is also possible to change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Change Part II conduction band 12 length and width, thus it is possible to vary the operating frequency of antenna, working band width and radiation the line of rabbet joint 3 electrical length.
Change the quantity of loading capacitance (7), capacitance and spacing, the characteristic impedance of the low-resistance line of rabbet joint 8 can be regulated, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Change the width of the radiation line of rabbet joint 3, it is possible to regulate the characteristic impedance of the low-resistance line of rabbet joint 8 and the high resistant line of rabbet joint 9, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
The operating frequency of low frequency operation frequency band and the operating frequency of high-frequency work frequency band of three polarization half slot antennas of capacitive load Stepped Impedance are mainly determined by the resonant frequency of the radiation line of rabbet joint 3, but the operating frequency of antenna and matching degree can also be adjusted by the metal ground size of 2, the conduction band 5 of microstrip feed line 4 length and width in the radiation position of the line of rabbet joint 3, Part II conduction band 12.Owing to the radiation existing low-resistance line of rabbet joint 8 of the line of rabbet joint 3 has again the high resistant line of rabbet joint 9, constitute the radiation line of rabbet joint 3 of Stepped Impedance, not only make antenna miniaturization, reduce cross polarization, also reduce the size on metal ground 2, improve isolation and reduce the occlusion effect on metal ground 2, and it is also possible that antenna has multiple working band, and change the low-resistance line of rabbet joint 8 and the relative length of the high resistant line of rabbet joint 9, position and impedance, it is possible to adjust the position of two working bands respectively.Owing to the radiation line of rabbet joint 3 is quarter-wave resonance structure, more half as large than the radiation slot length of 1/2nd wavelength of usual two terminal shortcircuits, therefore the overall dimensions of antenna also reduces accordingly, and occlusion effect reduces further.
In technique, three polarization half slot antennas of capacitive load Stepped Impedance both can adopt common printed circuit board (PCB) (PCB) technique, it would however also be possible to employ the integrated circuit technologies such as LTCC (LTCC) technique or CMOS, Si substrate realize.Wherein electric capacity 7 can select the patch capacitor 7 of corresponding encapsulation the distance according to electric capacity 7 two pins electrode according to operating frequency, selects the width of the low-resistance line of rabbet joint 8.On manufacturing, the capacitive load Stepped Impedance antenna 13 of three single polarizations can be mutually perpendicular to by draw-in groove and be installed together, or is mutually perpendicular to by binding agent and is bonded together, or two kinds of methods use together.
In accordance with the above, the present invention can just be realized.
Claims (6)
1. three polarization half slot antennas of a capacitive load Stepped Impedance, it is characterised in that this antenna includes capacitive load Stepped Impedance antenna (13) of three single polarizations being mutually perpendicular to placement；Capacitive load Stepped Impedance antenna (13) of each single polarization includes medium substrate (1), be arranged on medium substrate (1) metal ground (2) and radiate the line of rabbet joint (3), microstrip feed line (4)；The one side of medium substrate (1) is metal ground (2), and the another side of medium substrate (1) is the conduction band (5) of microstrip feed line (4)；Having the radiation line of rabbet joint (3) on metal ground (2), the shape of the radiation line of rabbet joint (3) is rectangle, the center of the radiation line of rabbet joint (3) with being positioned at metal (2)；The short at one end of the radiation line of rabbet joint (3), the other end (6) is opened a way；In the radiation line of rabbet joint (3) near open end part, several electric capacity (7) is had to be connected in parallel across two edges of the radiation line of rabbet joint (3), make the radiation line of rabbet joint (3) near the characteristic impedance step-down of open end part, form the low-resistance line of rabbet joint (8)；The remainder of the radiation line of rabbet joint (3) is the high resistant line of rabbet joint (9), the high resistant line of rabbet joint (9) and the low-resistance line of rabbet joint (8) constitute the Stepped Impedance radiation line of rabbet joint (3) together, produce a relatively low low frequency operation frequency band of frequency and the higher high-frequency work frequency band of a frequency；Metal ground (2) is also the ground plane of described microstrip feed line (4), one end of microstrip feed line (4) is the port (10) of antenna, the other end of the conduction band (5) of microstrip feed line (4) strides across the high resistant line of rabbet joint (9) and stretches a segment length to terminal, the open-end of microstrip feed line (4)；The conduction band (5) of microstrip feed line has two parts to constitute, Part I conduction band (11) is the position that the port (10) from antenna has just crossed over the high resistant line of rabbet joint (9) to it, and the remainder of the conduction band of microstrip feed line is Part II conduction band (12).
2. three polarization half slot antennas of a kind of capacitive load Stepped Impedance according to claim 1, it is characterized in that changing the thickness of medium substrate (1), pcrmeability and dielectric constant, the high resistant line of rabbet joint (9) and the characteristic impedance of the low-resistance line of rabbet joint (8) can be changed, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3), and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
3. three polarization half slot antennas of a kind of capacitive load Stepped Impedance according to claim 1, it is characterized in that changing the length of the low-resistance line of rabbet joint (8), the low-resistance line of rabbet joint (8) position in the radiation line of rabbet joint (3), the electrical length of the radiation line of rabbet joint (3) can be regulated, to realize antenna miniaturization in various degree, it is also possible to change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
4. three polarization half slot antennas of a kind of capacitive load Stepped Impedance according to claim 1, it is characterized in that change Part II conduction band (12) length and width, thus it is possible to vary the operating frequency of antenna, working band width and radiation the line of rabbet joint (3) electrical length.
5. three polarization half slot antennas of a kind of capacitive load Stepped Impedance according to claim 1, it is characterized in that changing capacitance and the spacing of loading capacitance (7), the characteristic impedance of the low-resistance line of rabbet joint (8) can be regulated, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3), and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
6. three polarization half slot antennas of a kind of capacitive load Stepped Impedance according to claim 1, it is characterized in that changing the width of the radiation line of rabbet joint (3), the low-resistance line of rabbet joint (8) and the characteristic impedance of the high resistant line of rabbet joint (9) can be regulated, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3), and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216310.6A CN105742821A (en) | 2016-04-08 | 2016-04-08 | Capacitor-loaded stepped impedance type tri-polarization half-slot antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216310.6A CN105742821A (en) | 2016-04-08 | 2016-04-08 | Capacitor-loaded stepped impedance type tri-polarization half-slot antenna |
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| CN105742821A true CN105742821A (en) | 2016-07-06 |
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| CN201610216310.6A Pending CN105742821A (en) | 2016-04-08 | 2016-04-08 | Capacitor-loaded stepped impedance type tri-polarization half-slot antenna |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123200B1 (en) * | 1990-05-02 | 2006-10-17 | Nortel Networks Limited | Sea surface antenna |
| CN101714698A (en) * | 2008-09-05 | 2010-05-26 | 索尼爱立信移动通信股份公司 | Notch antenna and wireless device |
| CN104134871A (en) * | 2014-07-22 | 2014-11-05 | 南京邮电大学 | High-isolation semi-groove slot antenna array |
-
2016
- 2016-04-08 CN CN201610216310.6A patent/CN105742821A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123200B1 (en) * | 1990-05-02 | 2006-10-17 | Nortel Networks Limited | Sea surface antenna |
| CN101714698A (en) * | 2008-09-05 | 2010-05-26 | 索尼爱立信移动通信股份公司 | Notch antenna and wireless device |
| CN104134871A (en) * | 2014-07-22 | 2014-11-05 | 南京邮电大学 | High-isolation semi-groove slot antenna array |
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Application publication date: 20160706 |
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