CN109066062B - Miniaturized filtering strip-shaped dielectric antenna - Google Patents
Miniaturized filtering strip-shaped dielectric antenna Download PDFInfo
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- CN109066062B CN109066062B CN201810756235.1A CN201810756235A CN109066062B CN 109066062 B CN109066062 B CN 109066062B CN 201810756235 A CN201810756235 A CN 201810756235A CN 109066062 B CN109066062 B CN 109066062B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
Abstract
The invention discloses a miniaturized filter strip-shaped dielectric antenna, which comprises: the device comprises a strip-shaped dielectric sheet, a microstrip line, a half-wavelength microstrip line, a probe, a dielectric substrate and a metal ground; the strip-shaped dielectric sheet, the microstrip line and the half-wavelength microstrip line are arranged on one side of the dielectric substrate, and the metal ground is arranged on the other side of the dielectric substrate; the probe is arranged on the metal ground and is connected with the half-wavelength microstrip line through the microstrip line so as to transmit a signal to the half-wavelength microstrip line; the half-wavelength microstrip line is coupled with the strip-shaped dielectric sheet to couple the signal to the strip-shaped dielectric sheet so as to excite the TM on the strip-shaped dielectric sheet1And (4) cavity molding. The invention can realize the filtering function and greatly reduce the size of the medium.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a miniaturized filter strip-shaped dielectric antenna.
Background
The dielectric antenna and the filter antenna are antenna types determined from the material and function of the antenna, respectively, wherein the dielectric antenna body is composed of a dielectric, and the conductor loss is low, so that the dielectric antenna and the filter antenna have the advantages of low loss, high radiation efficiency, high design freedom degree and the like. The filtering antenna has the functions of filtering and receiving and transmitting the antenna, so that compared with the traditional mode of cascading the antenna with the filter, the filtering antenna can effectively reduce the requirement on the filter in a system, reduce the loss, improve the efficiency and reduce the mutual coupling between adjacent antennas. The two antennas are widely researched and applied, so that the dielectric antenna and the filtering antenna are combined to form the filtering dielectric antenna, and the advantages of the dielectric antenna and the filtering antenna can be combined, so that the antenna has better performance and characteristics.
Generally, dielectric antennas can be classified into low dielectric constant and high dielectric constant dielectric antennas according to the dielectric constant used, and the size of the low dielectric constant dielectric antenna is relatively larger than that of the low dielectric constant dielectric antenna depending on the operation mode. The existing reported filtering medium antenna is mostly realized by working in a HEM medium mode (the mode field distribution is concentrated in the medium) based on a medium with a low dielectric constant, so that the medium size is larger and is about 0.0047 lambda at present0 3(λ0Is the unit wavelength of air corresponding to the center frequency). At present, few filter antennas are realized by using high-dielectric-constant media, and most high-dielectric-constant dielectric antennas only realize the function of an antenna, although the antenna works in TM (transverse magnetic) mode11Cavity mode (the mode field distribution is concentrated between the dielectric slab and the metal ground), resulting in a reduced size of the dielectric (0.001 λ0 3) But does not have a filtering function. The presently reported work on TM based on high dielectric constant media11The filter antenna of the cavity mode is realized by laminating dielectric wafers, and the size of the dielectric is (0.014 lambda) while the integration of the functions of the filter and the antenna is realized0 3) But rather large compared to filter media antennas based on low dielectric constant media operating in the HEM dielectric mode.
Therefore, the conventional low-k dielectric filter antenna (HEM dielectric mode) has a large dielectric size, and most of the conventional high-k dielectric antennas (TM11 cavity mode) have a problem that although the dielectric size is reduced, the dielectric antenna does not have a filter function, and the dielectric antenna having a filter function has a large dielectric size.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a miniaturized filter strip-shaped dielectric antenna which can realize the filter function and greatly reduce the size of a medium.
The technical scheme provided by the invention for the technical problem is as follows:
the invention provides a miniaturized filter strip-shaped dielectric antenna, comprising: the device comprises a strip-shaped dielectric sheet, a microstrip line, a half-wavelength microstrip line, a probe, a dielectric substrate and a metal ground;
the strip-shaped dielectric sheet, the microstrip line and the half-wavelength microstrip line are arranged on one side of the dielectric substrate, and the metal ground is arranged on the other side of the dielectric substrate;
the probe is arranged on the metal ground and is connected with the half-wavelength microstrip line through the microstrip line so as to transmit a signal to the half-wavelength microstrip line; the half-wavelength microstrip line is coupled with the strip-shaped dielectric sheet to couple the signal to the strip-shaped dielectric sheet so as to excite the TM on the strip-shaped dielectric sheet1And (4) cavity molding.
Furthermore, through holes are formed in the dielectric substrate and the metal ground, one end of the probe is arranged on the metal ground, and the other end of the probe is connected with the microstrip line through the through holes.
Further, the strip-shaped dielectric plate and the half-wavelength microstrip line are arranged in parallel, so that in a radiation frequency band, a tangential radiation component of the half-wavelength microstrip line has the same direction as that of the strip-shaped dielectric plate, and far fields of the strip-shaped dielectric plate and the half-wavelength microstrip line are mutually superposed in the direction of an antenna vertex to form the radiation frequency band; at the edge frequency point of the high end of the radiation frequency band, the tangential radiation component of the half-wavelength microstrip line is opposite to the tangential radiation component of the strip-shaped dielectric plate in direction, so that the far fields of the strip-shaped dielectric plate and the half-wavelength microstrip line are mutually offset in the direction of the antenna vertex to form a radiation zero point.
Further, the sizes of the strip-shaped dielectric plate and the half-wavelength microstrip line are adjustable;
the operating frequency of the antenna is adjusted by adjusting the length, the width and the height of the strip-shaped dielectric sheet and the length of the half-wavelength microstrip line.
Further, a gap is formed between the strip-shaped dielectric sheet and the half-wavelength microstrip line;
the working bandwidth of the antenna is adjusted by setting the size of the gap between the strip-shaped dielectric sheet and the half-wavelength microstrip line. The technical scheme provided by the embodiment of the invention has the following beneficial effects:
feeding TM via half-wavelength microstrip line1Mode strip dielectric patch feed for implementing filter dielectric antenna, TM1The distribution width of the electric field of the mode in the short side of the medium is far less than half wavelength, thereby greatly reducing the medium size of the antenna and effectively solving the problems of low dielectric constant filter medium antenna (HEM medium mode) and high dielectric constant filter medium antenna (TM) in the prior art11Cavity mold) the problem of larger media size; the half-wavelength microstrip line and the strip-shaped dielectric plate are arranged in parallel, so that the frequency selectivity of the antenna is improved while the radiation performance of the antenna is ensured; the strip-shaped dielectric sheet is kept in a strip shape, so that a high-order resonance frequency point of the strip-shaped dielectric sheet and a high-order working frequency point of the half-wavelength microstrip line are separated in a frequency domain, mutual coupling is reduced, and the out-of-band rejection performance of the antenna is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a top view of a miniaturized filter strip dielectric antenna according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view of a miniaturized filter strip dielectric antenna according to an embodiment of the present invention;
FIG. 3 is a graph illustrating simulated matching and gain curves of a miniaturized filter strip dielectric antenna according to an embodiment of the present invention;
FIG. 4 is an E-plane radiation pattern simulated by a miniaturized filter strip dielectric antenna according to an embodiment of the present invention;
fig. 5 is a simulated H-plane radiation pattern of a miniaturized filter strip dielectric antenna according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
An embodiment of the present invention provides a miniaturized filter strip dielectric antenna, referring to fig. 1 and fig. 2, including: the device comprises a strip-shaped dielectric sheet 1, a microstrip line 21, a half-wavelength microstrip line 2, a probe 5, a dielectric substrate 3 and a metal ground 4;
the strip-shaped dielectric sheet 1, the microstrip line 21 and the half-wavelength microstrip line 2 are arranged on one side of the dielectric substrate 3, and the metal ground 4 is arranged on the other side of the dielectric substrate 3;
the probe 5 is arranged on the metal ground 4, and the probe 5 is connected with the half-wavelength microstrip line 2 through the microstrip line 21 so as to transmit signals to the half-wavelength microstrip line 2; the half-wavelength microstrip line 2 is coupled with the strip-shaped dielectric plate 1 to couple the signal to the strip-shaped dielectric plate 1 to excite the TM on the strip-shaped dielectric plate 11And (4) cavity molding.
It should be noted that the probe is connected with the microstrip line, the microstrip line is connected with the half-wavelength microstrip line, and the half-wavelength microstrip line is coupled with the strip-shaped dielectric plate, so that the signal is transmitted to the half-wavelength microstrip line through the microstrip line, and then the signal is coupled and fed to the strip-shaped dielectric plate through the half-wavelength microstrip line, so as to excite the TM on the strip-shaped dielectric plate1Cavity mode, in which the electric field distribution width in the short side of the medium representing this mode is much less than half a wavelength, thus works as in the prior art for TM11The dielectric dimensions of the present embodiment are greatly reduced compared to the dielectric resonators of the cavity mode.
Further, as shown in fig. 2, through holes are provided on the dielectric substrate 3 and the metal ground 4, one end of the probe 5 is disposed on the metal ground 4, and the other end of the probe 5 is connected to the microstrip line 21 through the through hole.
Since the probe is provided on the metal ground, the probe is generally inserted through the metal ground and the dielectric substrate to be connected to the microstrip line.
Further, as shown in fig. 1, the strip-shaped dielectric plate 1 and the half-wavelength microstrip line 2 are arranged in parallel, so that in a radiation frequency band, a tangential radiation component of the half-wavelength microstrip line 2 has the same direction as that of the strip-shaped dielectric plate 1, and far fields of the strip-shaped dielectric plate 1 and the half-wavelength microstrip line 2 are mutually superposed in an antenna vertex direction to form a radiation frequency band; at the edge frequency point of the high end of the radiation frequency band, the tangential radiation component of the half-wavelength microstrip line 2 is opposite to the tangential radiation component of the strip-shaped dielectric plate 1 in direction, so that the far fields of the strip-shaped dielectric plate 1 and the half-wavelength microstrip line 2 are mutually offset in the direction of the antenna vertex to form a radiation zero point, and the frequency selectivity of the antenna is improved.
Further, as shown in fig. 1, the sizes of the strip-shaped dielectric sheet 1 and the half-wavelength microstrip line 2 are both adjustable;
the operating frequency of the antenna is adjusted by adjusting the length, the width and the height of the strip-shaped dielectric sheet and the length of the half-wavelength microstrip line.
It should be noted that, the strip-shaped dielectric sheet is kept in a strip shape, so that the high-order resonance frequency point of the strip-shaped dielectric sheet and the high-order working frequency point of the half-wavelength microstrip line are separated in the frequency domain, and mutual coupling is reduced, so that the out-of-band rejection performance of the antenna can be improved.
In addition, the change of the length, the width, the height and the length of the half-wavelength microstrip line of the strip-shaped dielectric sheet can adjust the working frequency of the antenna.
Further, as shown in fig. 1, a gap is formed between the strip-shaped dielectric sheet 1 and the half-wavelength microstrip line 2;
the working bandwidth of the antenna is adjusted by setting the size of the gap between the strip-shaped dielectric sheet and the half-wavelength microstrip line.
It should be noted that, the change of the gap between the strip-shaped dielectric plate and the half-wavelength microstrip line can adjust the operating bandwidth of the antenna.
In practical application, the medium size of the miniaturized filter strip-shaped medium antenna provided by the invention is only 0.0008 lambda0 3Much smaller than the low dielectric constant of the prior artDielectric size of 0.0047 lambda of digital filter dielectric antenna (HEM dielectric mode)0 3And high dielectric constant filter medium antenna (TM) in the prior art11Cavity mold) medium size 0.014 λ0 3。
The miniaturized filter strip dielectric antenna is simulated to obtain the simulated matching response and the radiation response of the antenna, and as shown in fig. 3, the miniaturized filter strip dielectric antenna works at 4.9GHz, the gain at the center frequency is 7.3dBi, and the matching bandwidth of 10dB is 4%. Antenna patterns at 4.9GHz as shown in fig. 4 and 5, it can be seen that the cross-polarization of the antenna is less than-25 dB in either the E-plane or the H-plane. The dielectric constant of the tape-shaped dielectric sheet used in this example was 89.5, the loss angle was 0.0006, and the dielectric substrate used was 3.38, 0.0027 and 0.813mm in height.
This embodiment can feed TM through a half-wavelength microstrip line1Mode strip dielectric patch feed for implementing filter dielectric antenna, TM1The distribution width of the electric field of the mode in the short side of the medium is far less than half wavelength, thereby greatly reducing the medium size of the antenna and effectively solving the problems of low dielectric constant filter medium antenna (HEM medium mode) and high dielectric constant filter medium antenna (TM) in the prior art11Cavity mold) the problem of larger media size; the half-wavelength microstrip line and the strip-shaped dielectric plate are arranged in parallel, so that the frequency selectivity of the antenna is improved; the strip-shaped dielectric sheet is kept in a strip shape, so that a high-order resonance frequency point of the strip-shaped dielectric sheet and a high-order working frequency point of the half-wavelength microstrip line are separated in a frequency domain, mutual coupling is reduced, and the out-of-band rejection performance of the antenna is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A miniaturized filtered strip dielectric antenna comprising: the device comprises a strip-shaped dielectric sheet, a microstrip line, a half-wavelength microstrip line, a probe, a dielectric substrate and a metal ground;
the strip-shaped dielectric sheet, the microstrip line and the half-wavelength microstrip line are arranged on one side of the dielectric substrate, and the metal ground is arranged on the other side of the dielectric substrate;
the probe is arranged on the metal ground and is connected with the half-wavelength microstrip line through the microstrip line so as to transmit a signal to the half-wavelength microstrip line; the half-wavelength microstrip line is coupled with the strip-shaped dielectric sheet to couple the signal to the strip-shaped dielectric sheet so as to excite the TM on the strip-shaped dielectric sheet1A cavity mold;
the strip-shaped dielectric plate and the half-wavelength microstrip line are arranged in parallel, so that the tangential radiation component of the half-wavelength microstrip line and the tangential radiation component of the strip-shaped dielectric plate have the same direction in a radiation frequency band, and far fields of the strip-shaped dielectric plate and the half-wavelength microstrip line are mutually superposed in the direction of an antenna vertex to form a radiation frequency band; at the edge frequency point of the high end of the radiation frequency band, the tangential radiation component of the half-wavelength microstrip line is opposite to the tangential radiation component of the strip-shaped dielectric plate in direction, so that the far fields of the strip-shaped dielectric plate and the half-wavelength microstrip line are mutually offset in the direction of the antenna vertex to form a radiation zero point.
2. The miniaturized filter strip dielectric antenna of claim 1, wherein the dielectric substrate and the metal ground are provided with a through hole, one end of the probe is disposed on the metal ground, and the other end of the probe is connected to the microstrip line through the through hole.
3. The miniaturized filtered strip dielectric antenna of claim 1 wherein the dimensions of the strip dielectric slab and the half-wavelength microstrip line are adjustable;
the operating frequency of the antenna is adjusted by adjusting the length, the width and the height of the strip-shaped dielectric sheet and the length of the half-wavelength microstrip line.
4. The miniaturized filtering strip dielectric antenna of claim 1 wherein the strip dielectric slab and the half-wavelength microstrip have a gap therebetween;
the working bandwidth of the antenna is adjusted by setting the size of the gap between the strip-shaped dielectric sheet and the half-wavelength microstrip line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810756235.1A CN109066062B (en) | 2018-07-11 | 2018-07-11 | Miniaturized filtering strip-shaped dielectric antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810756235.1A CN109066062B (en) | 2018-07-11 | 2018-07-11 | Miniaturized filtering strip-shaped dielectric antenna |
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| CN109066062A CN109066062A (en) | 2018-12-21 |
| CN109066062B true CN109066062B (en) | 2020-09-15 |
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| US4751480A (en) * | 1986-11-14 | 1988-06-14 | Hewlett-Packard Company | One port magnetostatic wave resonator |
| US5448252A (en) * | 1994-03-15 | 1995-09-05 | The United States Of America As Represented By The Secretary Of The Air Force | Wide bandwidth microstrip patch antenna |
| CN101807745A (en) * | 2010-03-29 | 2010-08-18 | 清华大学 | Dielectric resonant antenna working in resonant TExdelta01 mode |
| US20160322708A1 (en) * | 2013-12-20 | 2016-11-03 | Mohammadreza Tayfeh Aligodarz | Dielectric resonator antenna arrays |
| CN106961013A (en) * | 2017-03-21 | 2017-07-18 | 南通大学 | A kind of dipole antenna of low section |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001266646A (en) * | 2000-03-16 | 2001-09-28 | Matsushita Electric Ind Co Ltd | Dielectric composite thin film and its applied element |
| CN107230828A (en) * | 2017-04-15 | 2017-10-03 | 深圳市景程信息科技有限公司 | Miniaturization filtering is antenna integrated |
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- 2018-07-11 CN CN201810756235.1A patent/CN109066062B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4751480A (en) * | 1986-11-14 | 1988-06-14 | Hewlett-Packard Company | One port magnetostatic wave resonator |
| US5448252A (en) * | 1994-03-15 | 1995-09-05 | The United States Of America As Represented By The Secretary Of The Air Force | Wide bandwidth microstrip patch antenna |
| CN101807745A (en) * | 2010-03-29 | 2010-08-18 | 清华大学 | Dielectric resonant antenna working in resonant TExdelta01 mode |
| US20160322708A1 (en) * | 2013-12-20 | 2016-11-03 | Mohammadreza Tayfeh Aligodarz | Dielectric resonator antenna arrays |
| CN106961013A (en) * | 2017-03-21 | 2017-07-18 | 南通大学 | A kind of dipole antenna of low section |
Non-Patent Citations (1)
| Title |
|---|
| Theoretical and Experimental Investigations;Rajesh Kumar Mongia等;《 IEEE Transactions on Antennas and Propagation》;19970930;第45卷(第9期);全文 * |
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Application publication date: 20181221 Assignee: Nantong Zhijia Intelligent Equipment Co.,Ltd. Assignor: NANTONG University Contract record no.: X2023320000047 Denomination of invention: A miniaturized filter strip dielectric antenna Granted publication date: 20200915 License type: Common License Record date: 20230112 |
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Effective date of registration: 20230829 Address after: 226000 No. 9 Siyuan Road, Chongchuan District, Nantong City, Jiangsu Province Patentee after: Nantong University Technology Transfer Center Co.,Ltd. Address before: 226019 Jiangsu city of Nantong province sik Road No. 9 Institute of electronic and Information Engineering Nantong University Patentee before: NANTONG University |