CN115036685B - Notch reconfigurable ultra-wideband antenna - Google Patents
Notch reconfigurable ultra-wideband antenna Download PDFInfo
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- CN115036685B CN115036685B CN202210655690.9A CN202210655690A CN115036685B CN 115036685 B CN115036685 B CN 115036685B CN 202210655690 A CN202210655690 A CN 202210655690A CN 115036685 B CN115036685 B CN 115036685B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- 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
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a notch reconfigurable ultra-wideband antenna, and belongs to the field of microwave antenna design. The antenna is of a left-right mirror symmetry structure and comprises a dielectric substrate, a radiation patch, a microstrip feeder, two square empty slots and two reconfigurable units, wherein the radiation patch, the microstrip feeder, the two square empty slots and the two reconfigurable units are arranged on the front surface of the dielectric substrate; the square empty slots are respectively arranged at the left side and the right side of the microstrip feeder line and are used for detachably placing the reconfigurable units; the reconfigurable unit comprises a dielectric plate and an open resonance ring on the front surface of the dielectric plate, wherein the open resonance ring is provided with a gap for welding a varactor. The invention combines the electric reconfigurable and the manual reconfigurable, and the antenna has notch generating, removing and moving functions simultaneously by replacing the reconfigurable unit and adjusting the capacitance value of the varactor on the reconfigurable unit, so that the antenna has notch broadband moving characteristics.
Description
Technical Field
The invention belongs to the field of microwave antenna design, and particularly relates to a notch reconfigurable ultra-wideband antenna.
Background
With the rapid development of communication technology, ultra Wideband (UWB) systems have gained attention and attention by researchers. The Federal Communications Commission (FCC) has opened a frequency resource with a bandwidth of 7500MHz of 3.1 to 10.6GH for ultra-wideband devices. For the development of UWB systems, the design of UWB antennas is of great importance. The working frequency band of the UWB communication system comprises a plurality of civil narrowband communication frequency bands, such as a satellite broadcast C-band uplink/downlink frequency band (5.925-6.425/3.7-4.2 GHz), a local area network WLAN frequency band (5.15-5.35 GHz, 5.725-5.85 GHz), a satellite communication X-band uplink/downlink frequency band (7.9-8.4/7.25-7.75 GHz) and the like. Because the narrow-band communication system occupies the ultra-wideband partial frequency band, mutual interference is inevitably caused between the narrow-band communication frequency band and the ultra-wideband system, and therefore the UWB antenna with the notch characteristic has a certain research value.
In antenna design, many methods may provide the antenna with notch characteristics, including etching geometric slots, adding parasitic elements, or shorting directly. However, these notch bands are fixed and the antenna must be redesigned when they need to be removed or changed. Some researchers have proposed notch reconfigurable antennas, some of which can achieve on-off control of the notch and some of which can continuously move the notch operating band within a limited range. As the references "Ahmed s.elkorany, ghidaa t.ahmed, hesham a.mohamed and Zeinab f.elsharkawy," Reconfigurable band notch butterfly-wing shaped ultra-wide band antenna using varactor diodes, "Microsystem Technologies, vol.27, pp.2695-2703,2021" the authors propose to load varactors on the structural elements to achieve continuous movement of the notch operating band, but the range of movement of the notch is limited and the notch cannot be removed. As another example, the references "J.Sun, H.Jing, H.Zhou, Y.Wang, P.Wang and y. Qin." Design of a Reconfigurable Band-Notch SWB Antenna, "Progress In Electromagnetics Research Letters, vol.99, pp.1-9,2021". The authors propose to provide the antenna with a slot for placing a resonant ring dielectric sheet made of dielectric plates of different dielectric constants. By replacing the resonating ring dielectric patch, the antenna achieves notch movement and the notch can be removed without loading the resonating ring dielectric patch. However, if this manually reconfigurable method is used to achieve continuous notch movement over a wider frequency band, a large number of different resonant ring dielectric slabs need to be designed, resulting in significant manufacturing costs. How to use low cost to make UWB antenna possess notch generation, removal and wide range continuous movement function simultaneously is an important research breakthrough direction.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the notch reconfigurable ultra-wideband antenna, which has the functions of generating, removing and moving a wideband simultaneously in a mode of combining manual reconfiguration and electric reconfiguration.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the notch reconfigurable ultra-wideband antenna comprises a dielectric substrate, a radiation patch, a microstrip feeder line, two square empty slots and two reconfigurable units, wherein the radiation patch, the microstrip feeder line, the two square empty slots and the two reconfigurable units are arranged on the front surface of the dielectric substrate, and a grounding plate is arranged on the back surface of the dielectric substrate; the notch reconfigurable ultra-wideband antenna is of a left-right mirror symmetry structure;
the square empty slots are respectively arranged at the left side and the right side of the microstrip feeder line;
the reconfigurable unit is detachably arranged in the square empty groove;
the reconfigurable unit comprises a dielectric plate and an open resonance ring arranged on the front surface of the dielectric plate, and a gap is arranged at the opposite side of the opening of the open resonance ring and used for welding a varactor.
Further, the split ring resonator is a rectangular split ring resonator, and the split position is a center position of the metal arm adjacent to the microstrip feeder.
Further, the opening of the rectangular split resonant ring is provided with inwards bent transverse branches.
Further, the design method of the reconfigurable unit comprises the following steps:
s1, setting the initial size of a reconfigurable unit so as to be adaptively placed on two sides of a microstrip feeder line;
s2, selecting an open basic resonant ring structure, giving an initial size, and calculating the equivalent perimeter L of the open basic resonant ring structure;
s3, determining a center frequency f according to the integral frequency band to be moved by the notch; calculating the relative dielectric constant epsilon of the dielectric plate of the reconfigurable unit according to the formula (2) r ；
Wherein f is the center frequency of the notch position, c is the speed of light, ε r Is of dielectric materialA relative dielectric constant;
selecting a dielectric material with a corresponding relative dielectric constant as a dielectric plate of the reconfigurable unit;
s4, a gap is arranged on the opposite side of the opening basic resonant ring structure and used for loading the varactor;
s5, establishing an initial model of the notch reconfigurable ultra-wideband antenna and performing simulation optimization, and if the notch can move in the whole frequency band, finishing design to obtain a final model of the notch reconfigurable ultra-wideband antenna; if not, substituting the center frequencies of the uncovered frequency bands on the two sides into the formula (2), and returning to the step S3.
Further, the microstrip feeder is a rectangular microstrip feeder with characteristic impedance of 50Ω, one end of the microstrip feeder is a feed port, and the other end of the microstrip feeder is connected with a radiation patch.
Further, the radiation patch is a rectangular patch, and two right angles corresponding to the connection position of the rectangular patch and the microstrip feeder line are subjected to corner cutting treatment so as to expand the bandwidth.
Further, the grounding plate is a trapezoid patch, and a rectangular notch is formed in one side of the upper bottom of the trapezoid patch.
The beneficial effects of the invention are as follows:
the notch reconfigurable ultra-wideband antenna provided by the invention has the functions of generating, removing and moving the notch, and can realize the notch movement in a wider frequency band range by combining the electric reconfigurable mode and the manual reconfigurable mode. When the antenna is not provided with the reconfigurable unit, the antenna is in a notch-free mode; when the antenna is placed in the reconfigurable unit, the antenna is in notch mode. Under the notch mode, the continuous movement of the notch in a certain range can be realized by adjusting the capacitance value of the varactor on the reconfigurable unit, the capacitance value is increased, and the notch frequency band moves to low frequency; the range of notch movement can be further expanded by replacing reconfigurable units made of dielectric plates with different dielectric constants, the dielectric constants are increased, and the notch frequency band is moved to low frequency.
Drawings
Fig. 1 is a diagram of a notch reconfigurable ultra wideband antenna structure (with reconfigurable elements not placed) in an embodiment of the invention.
Fig. 2 is a diagram of a notch reconfigurable ultra wideband antenna structure (placing reconfigurable elements) in an embodiment of the invention.
Fig. 3 is a block diagram of a reconfigurable unit in an embodiment of the invention.
FIG. 4 is a graph of standing wave ratio for a notch reconfigurable ultra wideband antenna without notch and with notch mode simulation in an embodiment of the invention.
Fig. 5 is a graph of standing wave ratio of a notch movement simulation of a notch reconfigurable ultra wideband antenna tuning varactor capacitance value in an embodiment of the invention.
Fig. 6 is a graph of standing wave ratio of a simulation of notch movement of a notch reconfigurable ultra wideband antenna replacement reconfigurable unit in an embodiment of the invention.
Fig. 7 is a graph of standing wave ratio of a notch reconfigurable ultra wideband antenna in a notch movement simulation in an application background according to an embodiment of the present invention.
Detailed Description
The technical scheme and effects of the present invention are further described below with reference to specific embodiments and drawings.
The notch reconfigurable ultra wideband antenna of the present embodiment is used for shielding the satellite broadcast C-band uplink band (5.925-6.425 GHz), WLAN band (5.15-5.35 GHz, 5.725-5.85 GHz) or satellite X-band uplink/downlink band (7.9-8.4/7.25-7.75 GHz). As shown in fig. 1-3, the antenna structure is a left-right mirror symmetry structure, and comprises a dielectric substrate, a radiation patch arranged on the front surface of the dielectric substrate, a microstrip feeder, two square empty slots and two reconfigurable units, and a grounding plate arranged on the back surface of the dielectric substrate.
Wherein the dielectric substrate is FR4, the dielectric constant is 4.3, and the antenna size is 18×16×1.6mm 3 。
The microstrip feeder is a rectangular microstrip feeder with characteristic impedance of 50Ω, has length of 6mm and width of 1.8mm, is aligned with the center of the bottom of the front surface of the dielectric substrate, has one end as a feed port, and has the other end connected with the radiation patch.
The radiation patch is a rectangular patch subjected to corner cutting treatment, and the length of the rectangular patch is 11mm and the width of the rectangular patch is 7mm; and the two right angles corresponding to the connection position of the rectangular patch and the microstrip feeder line are subjected to corner cutting treatment to expand the working bandwidth, the width of the connection position is the same as that of the microstrip feeder line, and the length of the bottom edge of the cut triangle is 2mm.
The ground plate is isosceles trapezoid paster, and its height is 4mm, and the upper end is long to be 11mm, and the lower end is long to be 16mm, and the upper end one side of trapezoid paster is provided with the rectangle breach, and the rectangle breach is long to be 3.5mm, and the width is 1mm.
The two reconfigurable units are respectively positioned at the left side and the right side of the microstrip feeder line, and square empty slots are arranged for the detachable placement of the reconfigurable units.
The reconfigurable unit comprises a rectangular dielectric plate and a rectangular split resonant ring arranged on the front face of the dielectric plate, the opening position of the rectangular split resonant ring is the center position of a metal arm adjacent to the microstrip feeder, the opening is provided with inwards bent transverse branches, and the opposite side of the opening is provided with a gap for welding a varactor diode.
The design process of the reconfigurable unit in this embodiment is:
s1, setting the initial size of the reconfigurable unit to be 4.1X4.1X1.5 mm 3 So as to be adaptively placed at two sides of the microstrip feeder.
S2, selecting an open-base resonant ring structure and giving an initial size, in the embodiment, selecting a square open-base resonant ring, wherein an inward-bent transverse branch is arranged at the opening, the outer side length of the square open-base resonant ring is 4mm, the inner side length of the square open-base resonant ring is 3.5mm, the opening gap is 0.4mm, and the length of the inward-bent transverse branch at the opening is 1mm. Calculating the equivalent perimeter L of the open-base resonant ring structure through a formula (1);
L＝4×[(L 1 +L 2 )/2]-W+2×L 3 (1)
wherein L is 1 Is of outer side length L 2 W is the open gap width, L is the inner side length 3 Is the length of the transverse branch.
S3, determining the center frequency f to be 6.775GHz according to the integral frequency band to be moved by the notch; calculating the relative dielectric constant epsilon of the dielectric plate of the reconfigurable unit according to the formula (2) r 2.558, therefore Rogers RT5880 with a relative permittivity of 2.2 was chosen as the dielectric plate for the reconfigurable unit in the prior art materials.
Wherein f is the center frequency of the notch position, c is the speed of light, ε r Is the relative permittivity of the dielectric material.
S4, a gap is arranged on the opposite side of the opening basic resonant ring structure and used for loading a varactor, the model of the varactor is SMV2020-079LF, the capacitance value can be changed by 0-12V, and welding spots are arranged according to packaging.
S5, establishing an initial model of the notch reconfigurable ultra-wideband antenna and performing simulation optimization, wherein the whole frequency band cannot be covered by the notch moving range, so that 5.920GHz of the center frequency of the left uncovered frequency band is substituted into formula (2), the relative dielectric constant 3.660 is obtained through calculation, and Rogers RO3003 with the dielectric constant of 3 is selected from the existing materials as a dielectric plate of a second group of reconfigurable units; simulating again, determining that the center frequency of the frequency band which cannot be covered by the notch moving range is 5.575GHz, substituting the frequency band into the formula (2), calculating to obtain a relative dielectric constant 4.254, and selecting a Rogers RO4360 with a dielectric constant of 6.15 from the existing materials as a dielectric plate of a third group of reconfigurable units; the notch can be moved through the entire frequency band by three sets of reconfigurable cells.
As shown in fig. 4, when the square empty slot of the antenna is empty, the antenna is in a notch-free mode, and the working frequency band of the antenna is: 3.07-12.72GHz, when a set of reconfigurable cells is placed in a square void of the antenna, the antenna is in a notch mode, where a notch is created. The method enables the antenna to have notch generation and removal switching functions.
As shown in fig. 5, when the antenna square empty slot is placed with a reconfigurable unit with dielectric constant of 6.15, the antenna is in notch mode. At this time, the notch operating band will move by adjusting the capacitance of the varactor diode. As the capacitance increases, the notch operating band moves to a low frequency position. The shift range of the notch center frequency is 5.06-5.68GHz, and the range of the frequency band which can be covered is 4.73-6.45GHz.
As shown in FIG. 6, the capacitance value of the varactor diode is kept unchanged, and the reconfigurable unit manufactured by using dielectric plates with different dielectric constants is put into the square empty slot of the antenna for simulation, so that the notch working frequency band is moved. The notch operating band moves toward the low frequency position as the dielectric constant of the dielectric slab of the reconfigurable unit increases. The shift range of the notch center frequency is expanded to 5.06-7.57GHz, and the range of the frequency band which can be covered is 4.73-8.63GHz.
In combination with the two modes shown in fig. 5 and 6, the antenna can extend the range over which the notch can move continuously.
As shown in fig. 7, when two adjacent narrowband communication frequency bands need to be shielded and switched, the capacitance value of the varactor can be directly adjusted, for example, when the notch mode of placing a reconfigurable unit with a dielectric constant of 6.15 is adopted, the capacitance value of the varactor is adjusted to be 0.48pF, the notch working frequency band is 5.39-6.45GHz, and the satellite broadcast C-band uplink frequency band (5.925-6.425 GHz) can be shielded; when the capacitance value of the varactor diode is regulated to be 1.03pF, the notch working frequency band is 4.98-6.12GHz, and the WLAN frequency band (5.15-5.35 GHz and 5.725-5.85 GHz) can be shielded. When two narrow-band communication frequency bands far away from each other need to be shielded and switched, for example, in the case of the above-mentioned shielded WLAN frequency band, the reconfigurable unit with different dielectric constants can be replaced, and the reconfigurable unit with the dielectric constant of 2.2 is replaced, and the capacitance value of the varactor diode is adjusted to be 0.48pF, so that a notch frequency band of 8.63-7.24GHz can be generated to shield the satellite X-band uplink/downlink frequency band (7.9-8.4/7.25-7.75 GHz).
Claims (3)
1. The notch reconfigurable ultra-wideband antenna comprises a dielectric substrate, a radiation patch, a microstrip feeder line, two square empty slots and two reconfigurable units, wherein the radiation patch, the microstrip feeder line, the two square empty slots and the two reconfigurable units are arranged on the front surface of the dielectric substrate, and a grounding plate is arranged on the back surface of the dielectric substrate; the notch reconfigurable ultra-wideband antenna is of a left-right mirror symmetry structure;
the square empty slots are respectively arranged at the left side and the right side of the microstrip feeder line;
the reconfigurable unit is detachably arranged in the square empty groove;
the reconfigurable unit comprises a dielectric plate and an open resonance ring arranged on the front surface of the dielectric plate, and a gap is arranged at the opposite side of the opening of the open resonance ring and used for welding a varactor;
the reconfigurable unit is obtained by:
s1, setting the initial size of a reconfigurable unit so as to be adaptively placed on two sides of a microstrip feeder line;
s2, selecting an open basic resonant ring structure, giving an initial size, and calculating the equivalent perimeter L of the open basic resonant ring structure;
s3, determining a center frequency f according to the integral frequency band to be moved by the notch; calculating the relative dielectric constant epsilon of the dielectric plate of the reconfigurable unit according to the formula (2) r ；
Wherein f is the center frequency of the notch position, c is the speed of light, ε r Is the relative dielectric constant of the dielectric material;
selecting a dielectric material with a corresponding relative dielectric constant as a dielectric plate of the reconfigurable unit;
s4, a gap is arranged on the opposite side of the opening basic resonant ring structure and used for loading the varactor;
s5, establishing an initial model of the notch reconfigurable ultra-wideband antenna and performing simulation optimization, and if the notch can move in the whole frequency band, finishing design to obtain a final model of the notch reconfigurable ultra-wideband antenna; if not, substituting the center frequencies of the uncovered frequency bands on the two sides into the formula (2), and returning to the step S3.
2. A notch reconfigurable ultra wideband antenna as claimed in claim 1 wherein said split ring resonator is a rectangular split ring resonator and the split position is the center of the metal arm adjacent the microstrip feed line.
3. A notch reconfigurable ultra wideband antenna as claimed in claim 2, wherein said rectangular split ring resonator is provided with inwardly bent transverse branches at its opening.
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| CN106252870A (en) * | 2016-08-31 | 2016-12-21 | 温州大学 | A kind of double trap UWB antenna |
| KR101697356B1 (en) * | 2016-02-02 | 2017-01-18 | 광운대학교 산학협력단 | Wideband reconfigurable antenna with expanding frequency variable range |
| CN107706523A (en) * | 2017-11-07 | 2018-02-16 | 山西大学 | A kind of controllable ultra-wideband antenna of trap |
| CN114243278A (en) * | 2021-12-15 | 2022-03-25 | 杭州电子科技大学 | Four-trap high-isolation ultra-wideband MIMO antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101994643B1 (en) * | 2017-08-31 | 2019-07-01 | 동국대학교 산학협력단 | A compact size ultra wide band antenna with multiple notches, the antenna design method and wireless communication device with the antenna |
| CN112332083A (en) * | 2020-10-16 | 2021-02-05 | 杭州电子科技大学 | Broadband omnidirectional trapped wave low-profile antenna |
| CN216624576U (en) * | 2020-12-09 | 2022-05-27 | 国网四川省电力公司信息通信公司 | Three-trapped wave ultra-wideband antenna applied to indoor positioning |
| CN114336058A (en) * | 2021-12-31 | 2022-04-12 | 湖南大学 | Frequency-electricity-adjustable double-trapped-wave miniaturized ultra-wideband microstrip antenna |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101697356B1 (en) * | 2016-02-02 | 2017-01-18 | 광운대학교 산학협력단 | Wideband reconfigurable antenna with expanding frequency variable range |
| CN106252870A (en) * | 2016-08-31 | 2016-12-21 | 温州大学 | A kind of double trap UWB antenna |
| CN107706523A (en) * | 2017-11-07 | 2018-02-16 | 山西大学 | A kind of controllable ultra-wideband antenna of trap |
| CN114243278A (en) * | 2021-12-15 | 2022-03-25 | 杭州电子科技大学 | Four-trap high-isolation ultra-wideband MIMO antenna |
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