CN113540763B - Antenna and equipment - Google Patents
Antenna and equipment Download PDFInfo
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- CN113540763B CN113540763B CN202110825171.8A CN202110825171A CN113540763B CN 113540763 B CN113540763 B CN 113540763B CN 202110825171 A CN202110825171 A CN 202110825171A CN 113540763 B CN113540763 B CN 113540763B
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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
- H01Q1/36—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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
Abstract
The invention discloses an antenna and equipment, which comprises a dielectric substrate, a feed patch, an impedance matching part, a grounding patch and a frequency reducing part. The feeding patch is excited by the feeding line and acts together with the impedance matching piece, the grounding patch and the frequency reducing piece to generate an operating frequency band covering the first target bandwidth. The impedance matching piece is used for adjusting the impedance of the antenna to adjust the impedance of the antenna to the target impedance, and the purpose of impedance matching is to increase the bandwidth of the antenna and improve the radiation efficiency of the antenna; the frequency reducing component is used for reducing the resonant frequency of the antenna, and aims to increase the bandwidth of the antenna. Therefore, the antenna of this application accessible impedance matching spare and frequency-reducing spare promote antenna performance, compare with the bandwidth that just widens the antenna through the shape and the area that change feed paster and ground paster, under the circumstances that realizes equal antenna bandwidth, the bandwidth of this application widens the mode and makes the occupation area of antenna reduce, and can make antenna design thinner, does benefit to the miniaturized design of antenna.
Description
Technical Field
The present invention relates to the field of bandwidth widening of antennas, and in particular, to an antenna and a device.
Background
The conventional antenna comprises a dielectric substrate, a feed patch and a grounding patch, wherein the feed patch and the grounding patch are arranged on the front surface of the dielectric substrate; the feeding patch is connected with the feeder line and is used for generating a working frequency band covering a certain bandwidth under the combined action of the feeding patch and the grounding patch under the excitation of the feeder line. At present, under the existing antenna structure, the bandwidth of the antenna is usually widened by changing the shapes and the areas of the feed patch and the ground patch, but the bandwidth widening mode can lead to the increase of the occupied area of the antenna, which is not beneficial to the miniaturization design of the antenna.
Therefore, how to provide a solution to the above technical problem is a problem that a person skilled in the art needs to solve at present.
Disclosure of Invention
The invention aims to provide an antenna and equipment, which can improve the performance of the antenna through an impedance matching part and a frequency reducing part, and compared with the bandwidth of the antenna which is widened by changing the shapes and the areas of a feed patch and a ground patch, the bandwidth widening mode of the antenna reduces the occupied area of the antenna and can make the design of the antenna thinner and is beneficial to the miniaturization design of the antenna under the condition of realizing the same antenna bandwidth.
In order to solve the above technical problems, the present invention provides an antenna, including:
a dielectric substrate;
a feeding patch which is arranged on the front surface of the dielectric substrate and is connected with the feeding line;
the impedance matching part is arranged on the front surface of the dielectric substrate and connected with the feed patch and is used for adjusting the impedance of the antenna so as to adjust the impedance of the antenna to the target impedance;
the grounding patch is arranged on the front surface of the dielectric substrate;
the frequency reducing piece is arranged on the front surface of the dielectric substrate and connected with the grounding patch and is used for reducing the resonance frequency of the antenna;
the feeding patch is used for generating an operating frequency band covering a first target bandwidth under the combined action of the impedance matching part, the grounding patch and the frequency reducing part under the feeding excitation of the feeding line.
Preferably, the feeding patch includes:
a first radiating patch connected to the feed line and a first end of the impedance matching member, respectively;
a second radiating patch connected to a second end of the impedance matching member.
Preferably, the antenna further comprises:
the coupling radiation part is arranged on the front surface of the dielectric substrate and connected with the second radiation patch;
the feeding patch is specifically used for generating a working frequency band covering a second target bandwidth under the combined action of the feeding radiation part, the impedance matching part, the grounding patch and the frequency reducing part under the feeding excitation of the feeding line; wherein the second target bandwidth is greater than the first target bandwidth.
Preferably, the coupling radiation part includes:
a first inductor connected to the second radiating patch;
and an inductive coupling patch connected to the first inductor.
Preferably, the inductive coupling patch includes:
a first rectangular patch disposed proximate to the first long side and the first short side of the dielectric substrate and positioned between the feed patch and the first long side;
a second rectangular patch connected to the first rectangular patch and located between the feed patch and the first short side; the second rectangular patch is connected with the first inductor;
and a third rectangular patch connected between the first rectangular patch and the first long side.
Preferably, the first radiation patch includes:
a fourth rectangular patch disposed proximate to the first long side and the first short side of the dielectric substrate and positioned between the ground patch and the first long side; the fourth rectangular patch is connected with the feeder line;
a fifth rectangular patch connected to the fourth rectangular patch and located between the ground patch and the first short side; the fifth rectangular patch is connected with the first end of the impedance matching part;
the second radiation patch is:
a sixth rectangular patch connected to the second end of the impedance matching member and located between the ground patch and the first short side.
Preferably, the impedance matching element is a capacitor, and the frequency reducing element is a second inductor.
Preferably, the ground patch comprises:
a first ground patch connected to a first end of the frequency reducing member;
and a second ground patch connected to a second end of the frequency reducing member.
Preferably, the first ground patch includes:
a seventh rectangular patch disposed proximate to the first long side and the first short side of the dielectric substrate;
an eighth rectangular patch connected to the seventh rectangular patch and located between the seventh rectangular patch and the feeding patch; the eighth rectangular patch is connected with the first end of the frequency reducing piece;
the second grounding patch is as follows:
and a ninth rectangular patch connected to the second end of the frequency reducing member and positioned between the eighth rectangular patch and the feeding patch.
In order to solve the technical problems, the invention also provides equipment comprising any one of the antennas.
The invention provides an antenna which comprises a dielectric substrate, a feed patch, an impedance matching part, a grounding patch and a frequency reducing part. The feeding patch is used for generating an operating frequency band covering a first target bandwidth under the combined action of the feeding patch and the impedance matching part, the grounding patch and the frequency reducing part under the feeding excitation of the feeding line. The impedance matching device is used for adjusting the impedance of the antenna to adjust the impedance of the antenna to a target impedance, and the purpose of impedance matching is to increase the bandwidth of the antenna and improve the radiation efficiency of the antenna; the frequency reducing component is used for reducing the resonant frequency of the antenna, and aims to increase the bandwidth of the antenna. Therefore, the antenna of this application accessible impedance matching spare and frequency-reducing spare promote antenna performance, compare with the bandwidth that just widens the antenna through the shape and the area that change feed paster and ground paster, under the circumstances that realizes equal antenna bandwidth, the bandwidth of this application widens the mode and makes the occupation area of antenna reduce, and can make antenna design thinner, does benefit to the miniaturized design of antenna.
The invention also provides equipment which has the same beneficial effects as the antenna.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another antenna according to an embodiment of the present invention;
fig. 3 is a schematic diagram of overall dimensions of an antenna according to an embodiment of the present invention;
fig. 4 is a schematic diagram of specific dimensions of an antenna according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an antenna 1 according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an antenna 2 according to an embodiment of the present invention;
fig. 7 is a graph showing reflection coefficients of the antenna 1, the antenna 2 and the finally designed antenna according to the embodiment of the present invention;
FIG. 8 is a graph of the reflection coefficient simulated and measured for an antenna according to an embodiment of the present invention;
FIG. 9 is a two-dimensional radiation measured pattern of an antenna at 1600MHz frequency provided by an embodiment of the present invention;
FIG. 10 is a two-dimensional radiation measured pattern of an antenna at 2500MHz frequency provided by an embodiment of the present invention;
fig. 11 is a two-dimensional radiation actual measurement pattern of an antenna at 3500MHz frequency according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide an antenna and equipment, the antenna performance can be improved through an impedance matching part and a frequency reducing part, compared with the bandwidth of the antenna which is widened by changing the shapes and the areas of a feed patch and a ground patch, under the condition of realizing the same antenna bandwidth, the bandwidth widening mode of the invention reduces the occupied area of the antenna, and the antenna design can be thinner, thereby being beneficial to the miniaturization design of the antenna.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an antenna according to an embodiment of the invention.
The antenna comprises:
a dielectric substrate 100;
a feeding patch 200 provided on the front surface of the dielectric substrate 100 and connected to the feeder line;
the impedance matching piece 300 is arranged on the front surface of the dielectric substrate 100 and connected with the feeding patch 200, and is used for adjusting the impedance of the antenna so as to adjust the impedance of the antenna to a target impedance;
a ground patch 400 provided on the front surface of the dielectric substrate 100;
the frequency reducing piece 500 is arranged on the front surface of the dielectric substrate 100 and connected with the grounding patch 400, and is used for reducing the resonance frequency of the antenna;
the feeding patch 200 is used to generate an operating frequency band covering a first target bandwidth under the excitation of the feeding line, and cooperates with the impedance matching component 300, the grounding patch 400 and the frequency reducing component 500.
Specifically, the antenna of the present application includes a dielectric substrate 100, a feeding patch 200, an impedance matching element 300, a grounding patch 400, and a frequency reducing element 500, and the working principle thereof is as follows:
the dielectric substrate 100 is generally rectangular in structure, and is made of insulating material, and is an FR4 dielectric board. The feeding patch 200, the impedance matching member 300, the ground patch 400, and the frequency reducing member 500 are all disposed on the front surface of the dielectric substrate 100. The feeding patch 200 and the grounding patch 400 are both metal patches, and the materials of the feeding patch and the grounding patch are generally copper, which is a metal material with better conductivity and lower cost. The feeding patch 200 is connected to a feeding line, and the feeding patch 200 is connected to an impedance matching part 300, the impedance matching part 300 is used for adjusting the impedance of the antenna to a target impedance (the preferred value of the target impedance is 50 ohms), and the purpose of impedance matching is to increase the bandwidth of the antenna and the radiation efficiency of the antenna, thereby improving the performance of the antenna. The ground patch 400 is Grounded (GND), and the ground patch 400 is connected to the frequency-reducing unit 500, where the frequency-reducing unit 500 is used to reduce the resonant frequency of the antenna, so as to cover the antenna with a lower frequency band, thereby increasing the bandwidth of the antenna and improving the performance of the antenna.
Based on this, it is possible for the antenna structure of the present application to realize: the feeding patch 200 is used to generate an operating band covering a first target bandwidth under the excitation of the feeding line, in cooperation with the impedance matching element 300, the ground patch 400 and the frequency reducing element 500. In the application of the antenna, the antenna is generally attached to the inner surface of a device (such as a sound box or a wearable device such as a watch, a bracelet, etc.). If the device is a transmitting device, the device may transmit radio frequency energy to the feeding patch 200 via the power supply line and be emitted by the feeding patch 200; if the device is a receiving device, the device may receive rf energy transmitted from outside through the feeding patch 200 and transmit the rf energy to the internal process of the device via the feeding line.
Therefore, the antenna of this application accessible impedance matching spare and frequency-reducing spare promote antenna performance, compare with the bandwidth that just widens the antenna through the shape and the area that change feed paster and ground paster, under the circumstances that realizes equal antenna bandwidth, the bandwidth of this application widens the mode and makes the occupation area of antenna reduce, and can make antenna design thinner, does benefit to the miniaturized design of antenna.
Based on the above embodiments:
referring to fig. 2, fig. 2 is a schematic structural diagram of another antenna according to an embodiment of the present invention.
As an alternative embodiment, the feeding patch 200 includes:
a first radiating patch connected to the first ends of the power feed lines and the impedance matching member 300, respectively;
a second radiating patch connected to a second end of the impedance matching member 300.
Specifically, the feeding patch 200 of the present application includes two radiation patches that are not in contact in structure, which are respectively referred to as a first radiation patch and a second radiation patch, and a feeding point a is provided on the first radiation patch for connecting a feeding line. The impedance matching member 300 is connected between the first radiating patch and the second radiating patch to function as an adjustment of the impedance of the antenna.
As an alternative embodiment, the antenna further comprises:
a coupling radiation part 600 provided on the front surface of the dielectric substrate 100 and connected to the second radiation patch;
the feeding patch 200 is specifically configured to co-act with the coupling radiation portion 600, the impedance matching component 300, the ground patch 400, and the frequency reducing component 500 under the excitation of the feeding line to generate an operating frequency band covering the second target bandwidth; wherein the second target bandwidth is greater than the first target bandwidth.
Further, the antenna of the present application further includes a coupling radiation portion 600, where the coupling radiation portion 600 is connected to the second radiation patch, and the purpose of adding the coupling radiation portion 600 is to increase the bandwidth of the antenna, thereby improving the performance of the antenna. Specifically, the feeding patch 200 cooperates with the coupling radiation part 600, the impedance matching member 300, the ground patch 400, and the frequency reducing member 500 under the feeding excitation of the feeding line to generate an operating frequency band covering a second target bandwidth (greater than the first target bandwidth).
As an alternative embodiment, the coupling radiation part 600 includes:
the first inductor L1 is connected with the second radiation patch;
an inductive coupling patch connected to the first inductance L1.
Specifically, the coupling radiation portion 600 of the present application includes a first inductance L1 and an inductance coupling patch, and the working principle thereof is:
the first inductor L1 is connected between the second radiation patch and the inductive coupling patch, and under the structural arrangement, the resonance point of the antenna can be increased, so that the bandwidth of the antenna is increased, and the performance of the antenna is improved.
As an alternative embodiment, the inductive coupling patch comprises:
a first rectangular patch 601 disposed adjacent to the first long side and the first short side of the dielectric substrate 100 and located between the feeding patch 200 and the first long side;
a second rectangular patch 602 connected to the first rectangular patch 601 and located between the feeding patch 200 and the first short side; the second rectangular patch 602 is connected with the first inductor L1;
a third rectangular patch 603 connected between the first rectangular patch 601 and the first long side.
Specifically, the inductively coupled patch of the present application includes a first rectangular patch 601, a second rectangular patch 602, and a third rectangular patch 603, and the specific structure thereof is as follows:
the dielectric substrate 100 is a rectangular substrate and includes a first long side, a second long side, a first short side, and a second short side. The first rectangular patch 601 is disposed near the first long side and the first short side of the dielectric substrate 100, the first rectangular patch 601 is located between the feeding patch 200 and the first long side of the rectangular substrate, a certain distance is provided between the first rectangular patch 601 and the feeding patch 200, a certain distance is provided between the first rectangular patch 601 and the first long side of the rectangular substrate, and the long side of the first rectangular patch 601 may be parallel to the long side of the rectangular substrate.
The second rectangular patch 602 is connected with the first rectangular patch 601 and the first inductor L1, the second rectangular patch 602 is located between the feeding patch 200 and the first short side of the rectangular substrate, a certain distance is provided between the second rectangular patch 602 and the feeding patch 200, one side of the second rectangular patch 602 coincides with the first short side of the rectangular substrate (all points on the short line segment coincide with each other are on the long line segment) or a certain distance is provided between the second rectangular patch 602 and the first short side of the rectangular substrate, the long side of the second rectangular patch 602 may be parallel to the short side of the rectangular substrate, and the second rectangular patch 602 and the first rectangular patch 601 are equivalent to two right-angle sides of a right angle.
The third rectangular patch 603 is connected between the first rectangular patch 601 and the first long side of the rectangular substrate, the long side of the third rectangular patch 603 may be parallel to the short side of the rectangular substrate, and the third rectangular patch 603 and the first rectangular patch 601 correspond to two right angle sides of a right angle.
It should be noted that, this kind of structural design of inductive coupling paster is favorable to the design of widening of antenna bandwidth, and is favorable to reducing the area occupied of antenna, is favorable to the miniaturized design of antenna.
As an alternative embodiment, the first radiating patch comprises:
a fourth rectangular patch 201 disposed adjacent to the first long side and the first short side of the dielectric substrate 100 and located between the ground patch 400 and the first long side; the fourth rectangular patch 201 is connected to a feeder line;
a fifth rectangular patch 202 connected to the fourth rectangular patch 201 and located between the ground patch 400 and the first short side; the fifth rectangular patch 202 is connected to a first end of the impedance matching member 300;
the second radiation patch is:
a sixth rectangular patch 203 connected to the second end of the impedance matching member 300 and located between the ground patch 400 and the first short side.
Specifically, the first radiation patch of the present application includes a fourth rectangular patch 201 and a fifth rectangular patch 202, and the second radiation patch is a sixth rectangular patch 203, and its specific structure is as follows:
the dielectric substrate 100 is a rectangular substrate and includes a first long side, a second long side, a first short side, and a second short side. The fourth rectangular patch 201 is disposed near the first long side and the first short side of the dielectric substrate 100, the fourth rectangular patch 201 is disposed between the ground patch 400 and the first long side of the rectangular substrate, and since the first rectangular patch 601 is disposed between the feeding patch 200 (first radiating patch+second radiating patch) and the first long side of the rectangular substrate, the fourth rectangular patch 201 is specifically disposed between the ground patch 400 and the first rectangular patch 601, a certain distance is provided between the fourth rectangular patch 201 and the ground patch 400, a certain distance is provided between the fourth rectangular patch 201 and the first rectangular patch 601, and the long side of the fourth rectangular patch 201 may be parallel to the long side of the rectangular substrate. On the fourth rectangular patch 201, a feeding point a for connecting a feeder line is provided on a short side distant from the first short side of the dielectric substrate 100.
The fifth rectangular patch 202 is connected to the fourth rectangular patch 201, the fifth rectangular patch 202 is located between the ground patch 400 and the first short side of the rectangular substrate, and since the second rectangular patch 602 is located between the feeding patch 200 and the first short side of the rectangular substrate, the fifth rectangular patch 202 is specifically located between the ground patch 400 and the second rectangular patch 602, a certain distance is provided between the fifth rectangular patch 202 and the ground patch 400, a certain distance is provided between the fifth rectangular patch 202 and the second rectangular patch 602, and the long side of the fifth rectangular patch 202 may be parallel to the short side of the rectangular substrate, and the fifth rectangular patch 202 and the fourth rectangular patch 201 correspond to two right-angle sides of a right angle. On the fifth rectangular patch 202, a connection point is provided on a short side of the first long side remote from the dielectric substrate 100 for connecting the first end of the impedance matching member 300.
The sixth rectangular patch 203 is connected to the second end of the impedance matching member 300, the sixth rectangular patch 203 is located between the ground patch 400 and the first short side of the rectangular substrate, and since the second rectangular patch 602 is located between the feeding patch 200 and the first short side of the rectangular substrate, the sixth rectangular patch 203 is specifically located between the ground patch 400 and the second rectangular patch 602, a certain distance is provided between the sixth rectangular patch 203 and the ground patch 400, a certain distance is provided between the sixth rectangular patch 203 and the second rectangular patch 602, and the long side of the sixth rectangular patch 203 may be parallel to the short side of the rectangular substrate. On the sixth rectangular patch 203, a connection point is provided on a short side near the first long side of the dielectric substrate 100 for connecting the second end of the impedance matching member 300. The long side of the sixth rectangular patch 203 that is close to the first short side of the dielectric substrate 100 is in the same line as the long side of the fifth rectangular patch 202 that is close to the first short side of the dielectric substrate 100. The long side of the sixth rectangular patch 203 that is away from the first short side of the dielectric substrate 100 is in line with the long side of the fifth rectangular patch 202 that is away from the first short side of the dielectric substrate 100. The short side of the sixth rectangular patch 203 that is remote from the first long side of the dielectric substrate 100 is in line with the short side of the second rectangular patch 602 that is remote from the first long side of the dielectric substrate 100. The first inductor L1 is specifically connected between the sixth rectangular patch 203 and the second rectangular patch 602, and a connection point of the first inductor L1 on the rectangular patch is as far away from the first long side of the dielectric substrate 100 as possible.
It should be noted that, this structural design of the feeding patch 200 is beneficial to widening the bandwidth of the antenna, reducing the occupied area of the antenna, and miniaturizing the antenna.
As an alternative embodiment, the impedance matching device 300 is a capacitor C1, and the frequency reducing device 500 is a second inductor L2.
Specifically, the impedance matching device 300 of the present application may select a capacitor C1, and adjust the impedance of the antenna to be located to a target impedance by changing the capacitance value of the capacitor C1; the frequency reducing component 500 may be a second inductor L2, where the second inductor L2 is used to increase the length of the antenna so as to reduce the resonant frequency of the antenna.
As an alternative embodiment, the ground patch 400 includes:
a first ground patch connected to a first end of the frequency reduction member 500;
a second ground patch connected to a second end of the frequency down member 500.
Specifically, the grounding patch 400 of the present application includes a first grounding patch and a second grounding patch, and the working principle thereof is:
the first grounding patch is provided with a grounding point B for grounding treatment. The first ground patch is connected to a first end of the frequency reduction member 500 and the second ground patch is connected to a second end of the frequency reduction member 500. The conventional grounding patch only comprises a first grounding patch, so that the frequency reducing component 500 and a second grounding patch are additionally arranged on the basis of the first grounding patch, and the purpose is to increase the length of the antenna so that the resonance point of the antenna is lower.
As an alternative embodiment, the first ground patch includes:
a seventh rectangular patch 401 disposed adjacent to the first long side and the first short side of the dielectric substrate 100;
an eighth rectangular patch 402 connected to the seventh rectangular patch 401 and located between the seventh rectangular patch 401 and the feeding patch 200; the eighth rectangular patch 402 is connected to the first end of the frequency reduction member 500;
the second ground patch is:
a ninth rectangular patch 403 connected to the second end of the frequency reducing member 500 and located between the eighth rectangular patch 402 and the feeding patch 200.
Specifically, the first grounding patch of the present application includes a seventh rectangular patch 401 and an eighth rectangular patch 402, and the second grounding patch is a ninth rectangular patch 403, and its specific structure is as follows:
the dielectric substrate 100 is a rectangular substrate and includes a first long side, a second long side, a first short side, and a second short side. The seventh rectangular patch 401 is disposed adjacent to the first long side and the first short side of the dielectric substrate 100, and the long side of the seventh rectangular patch 401 may be parallel to the short side of the rectangular substrate. The eighth rectangular patch 402 is connected to the seventh rectangular patch 401, and the eighth rectangular patch 402 is located between the seventh rectangular patch 401 and the fifth/sixth rectangular patch of the feeding patch 200, and the long side of the eighth rectangular patch 402 may be parallel to the short side of the rectangular substrate. The long side of the eighth rectangular patch 402, which is distant from the first short side of the dielectric substrate 100, overlaps the long side of the seventh rectangular patch 401, which is close to the first short side of the dielectric substrate 100. The short side of the eighth rectangular patch 402 near the first long side of the dielectric substrate 100 is in the same line as the short side of the seventh rectangular patch 401 near the first long side of the dielectric substrate 100.
The ninth rectangular patch 403 is located between the eighth rectangular patch 402 and the fifth/sixth rectangular patch of the feeding patch 200, and the long side of the ninth rectangular patch 403 may be parallel to the short side of the rectangular substrate. The short side of the ninth rectangular patch 403 that is adjacent to the first long side of the dielectric substrate 100 is in line with the short side of the eighth rectangular patch 402 that is adjacent to the first long side of the dielectric substrate 100. The frequency reducing member 500 is specifically connected between the eighth rectangular patch 402 and the ninth rectangular patch 403, and the connection point of the frequency reducing member 500 on the rectangular patch is as close to the first long side of the dielectric substrate 100 as possible.
It should be noted that, this structural design of the ground patch 400 is beneficial to widening the bandwidth of the antenna, reducing the occupied area of the antenna, and miniaturizing the antenna. The antenna of the present application is integrally disposed adjacent to the first long side and the first short side of the dielectric substrate 100, and the purpose of such design is that the use loss generated when the antenna is mounted in the device is small.
More specifically, as shown in fig. 3, the antenna designed in the present application has a size of 30.5mm×9mm (the specific size of the antenna is shown in fig. 4, and the unit mm) and is designed on a dielectric substrate 100 having a dielectric constant of 4.4 and a thickness of 0.8mm, and the size of the dielectric substrate 100 is 120mm×60mm.
The design process of the antenna designed by the application is as follows: antenna 1 as shown in fig. 5→antenna 2 as shown in fig. 6→antenna as shown in fig. 2. The antenna 1 consists of a feed patch loaded with a capacitor (0.3 pF, which can be formed by connecting a plurality of capacitors with a value of 1.2pF in series). The antenna 2 is composed of an antenna 1 and a ground patch loaded with a second inductance (1.5 nh). The antenna designed by the application comprises a coupling radiation part (a first inductor (which can be formed by connecting a plurality of inductors with 3.9nH value in parallel) +an inductance coupling patch) besides the antenna 1 and the antenna 2.
As shown in fig. 7, fig. 7 shows the reflection coefficients of the antennas 1, 2 and the final design of the antennas. In the antenna 1, the feeding patch generates a 1900MHz resonance mode, and the feeding patch performs antenna impedance matching by using a 0.3pF capacitor to adjust the resonance mode of the excitation antenna, thereby increasing the antenna bandwidth. In antenna 2, the ground patch loaded with the 1.5nH second inductance creates a resonant mode at 1540MHz and 2560MHz, increasing the antenna bandwidth. In the final antenna design, a coupling radiating section (first inductive + inductive coupling patch) is added, producing a half wavelength mode at 3410MHz and a quarter wavelength mode at 1650 MHz. By combining all these modes, the antenna achieves dual broadband operation.
As shown in fig. 8, fig. 8 shows the reflection coefficient of the antenna designed in the application under the simulation and actual measurement conditions, and the impedance bandwidth of the antenna is from 1555MHz to 2690MHz and from 3100MHz to 3700MHz. The antenna designed in the present application can be applied to frequency bands such as GPS (Global Positioning System ), GLONASS (GLOBAL NAVIGATION SATELLITE SYSTEM, global satellite navigation system), GSM (Global System for Mobile Communications ), UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system), LTE (Long Term Evolution, long term evolution of UMTS technical standard), wiMax (a wireless metropolitan area network conforming to IEEE802.16 standard), bluetooth, WLAN (Wireless Local Area Network ), WWAN (wireless wide area network, wireless wide area network), and the like. As shown in table 1 below, the coverage bands of the antenna designed in the present application and the antenna efficiency and gain in the corresponding coverage bands (the antenna efficiency ranges for all coverage bands are 60% to 93%, which is an acceptable range for small mobile communication devices) are given:
TABLE 1
As shown in fig. 9-11, two-dimensional radiation measured patterns of the antenna at 1600MHz, 2500MHz, 3500MHz frequencies are shown, and the results show that the antenna exhibits omnidirectional and dipole-like characteristics in three planes at 1600MHz, 2500MHz, and 3500MHz frequencies.
In summary, the antenna of the present application achieves ultra-thin and miniaturized antennas by using a coupling technology, a loading technology, a multi-branch technology and a bending technology, and the thickness of the antenna is only 0.8mm, thereby obtaining a compact, low-profile planar multi-band antenna. Furthermore, the reflection coefficient, radiation characteristic, antenna gain and efficiency of the antenna are all good in the coverage band.
The application also provides a device comprising any of the antennas described above.
Specifically, the device of the application can be a wearable device such as a sound box or a watch, a bracelet and the like.
The description of the device provided in the present application refers to the embodiment of the antenna, and the description is omitted herein.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. An antenna, comprising:
a dielectric substrate;
a feeding patch which is arranged on the front surface of the dielectric substrate and is connected with the feeding line;
the impedance matching part is arranged on the front surface of the dielectric substrate and connected with the feed patch and is used for adjusting the impedance of the antenna so as to adjust the impedance of the antenna to the target impedance;
the grounding patch is arranged on the front surface of the dielectric substrate;
the frequency reducing piece is arranged on the front surface of the dielectric substrate and connected with the grounding patch and is used for reducing the resonance frequency of the antenna;
the feed patch is used for generating an operating frequency band covering a first target bandwidth under the combined action of the impedance matching part, the grounding patch and the frequency reducing part under the feed excitation of the feed line;
wherein, the ground patch includes:
a first ground patch connected to a first end of the frequency reducing member;
a second ground patch connected to a second end of the frequency reducing member;
the first ground patch includes:
a seventh rectangular patch disposed proximate to the first long side and the first short side of the dielectric substrate;
an eighth rectangular patch connected to the seventh rectangular patch and located between the seventh rectangular patch and the feeding patch; the eighth rectangular patch is connected with the first end of the frequency reducing piece;
the second grounding patch is as follows:
and a ninth rectangular patch connected to the second end of the frequency reducing member and positioned between the eighth rectangular patch and the feeding patch.
2. The antenna of claim 1, wherein the feed patch comprises:
a first radiating patch connected to the feed line and a first end of the impedance matching member, respectively;
a second radiating patch connected to a second end of the impedance matching member.
3. The antenna of claim 2, wherein the antenna further comprises:
the coupling radiation part is arranged on the front surface of the dielectric substrate and connected with the second radiation patch;
the feeding patch is specifically used for generating a working frequency band covering a second target bandwidth under the combined action of the feeding radiation part, the impedance matching part, the grounding patch and the frequency reducing part under the feeding excitation of the feeding line; wherein the second target bandwidth is greater than the first target bandwidth.
4. The antenna of claim 3, wherein the coupling radiation portion comprises:
a first inductor connected to the second radiating patch;
and an inductive coupling patch connected to the first inductor.
5. The antenna of claim 4, wherein the inductively coupled patch comprises:
a first rectangular patch disposed proximate to the first long side and the first short side of the dielectric substrate and positioned between the feed patch and the first long side;
a second rectangular patch connected to the first rectangular patch and located between the feed patch and the first short side; the second rectangular patch is connected with the first inductor;
and a third rectangular patch connected between the first rectangular patch and the first long side.
6. The antenna of claim 2, wherein the first radiating patch comprises:
a fourth rectangular patch disposed proximate to the first long side and the first short side of the dielectric substrate and positioned between the ground patch and the first long side; the fourth rectangular patch is connected with the feeder line;
a fifth rectangular patch connected to the fourth rectangular patch and located between the ground patch and the first short side; the fifth rectangular patch is connected with the first end of the impedance matching part;
the second radiation patch is:
a sixth rectangular patch connected to the second end of the impedance matching member and located between the ground patch and the first short side.
7. The antenna of claim 1, wherein the impedance matching element is a capacitor and the frequency reducing element is a second inductor.
8. An electronic device comprising an antenna according to any of claims 1-7.
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| CN202110825171.8A CN113540763B (en) | 2021-07-21 | 2021-07-21 | Antenna and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110825171.8A CN113540763B (en) | 2021-07-21 | 2021-07-21 | Antenna and equipment |
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| CN113540763B true CN113540763B (en) | 2023-04-25 |
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| US10727580B2 (en) * | 2018-07-16 | 2020-07-28 | Apple Inc. | Millimeter wave antennas having isolated feeds |
| CN209016258U (en) * | 2018-10-31 | 2019-06-21 | 上海航天芯锐电子科技有限公司 | A kind of novel small size UHF RFID near field antenna |
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