CN111969313A - High-gain differential dual-polarized antenna based on hollow dielectric patch resonator - Google Patents

High-gain differential dual-polarized antenna based on hollow dielectric patch resonator Download PDF

Info

Publication number
CN111969313A
CN111969313A CN202010825897.7A CN202010825897A CN111969313A CN 111969313 A CN111969313 A CN 111969313A CN 202010825897 A CN202010825897 A CN 202010825897A CN 111969313 A CN111969313 A CN 111969313A
Authority
CN
China
Prior art keywords
dielectric
patch
dielectric patch
resonator
gain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010825897.7A
Other languages
Chinese (zh)
Other versions
CN111969313B (en
Inventor
陈建新
王雪颖
唐世昌
杨永杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nantong University
Nantong Research Institute for Advanced Communication Technologies Co Ltd
Original Assignee
Nantong University
Nantong Research Institute for Advanced Communication Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nantong University, Nantong Research Institute for Advanced Communication Technologies Co Ltd filed Critical Nantong University
Priority to CN202010825897.7A priority Critical patent/CN111969313B/en
Publication of CN111969313A publication Critical patent/CN111969313A/en
Application granted granted Critical
Publication of CN111969313B publication Critical patent/CN111969313B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/10—Dielectric resonators
    • H01P7/105—Multimode resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Abstract

The invention relates to a high-gain differential dual-polarized antenna based on a hollow dielectric patch resonator, which comprises a lower dielectric substrate, a metal reflective floor, an upper dielectric substrate and a dielectric patch which are sequentially stacked from bottom to top, wherein the lower surface of the lower dielectric substrate is provided with two pairs of microstrip feeders for differential feed, the metal reflective floor is provided with a coupling gap, the upper dielectric substrate is provided with a square hole which is positioned right below the dielectric patch and is fused with the dielectric patch to form the hollow dielectric patch resonator. According to the invention, the square hole is formed below the dielectric patch to obtain the hollow dielectric patch resonator, so that the electromagnetic radiation from the side wall of the dielectric patch resonator is increased to further improve the gain, and the gain is also improvedMaking the master mode TM101The mode is moved upwards to be close to the higher order mode TM121Mode, thereby enabling bandwidth extension.

Description

High-gain differential dual-polarized antenna based on hollow dielectric patch resonator
Technical Field
The invention relates to a differential feed dual-polarized dielectric patch antenna with high gain, broadband and high isolation, belonging to the technical field of wireless communication.
Background
With the development of wireless communication technology, characteristics such as miniaturization, low loss, broadband, and high gain have become important indicators for antenna design. Microstrip patch antennas have been widely studied due to their superior characteristics of low profile, light weight and relatively high gain. In order to improve the information transmission rate, the carrier frequency of the radio frequency front end is gradually increased, so that the conductor loss of the microstrip patch antenna is more serious, and the radiation efficiency is reduced. To solve this problem, dielectric resonator antennas with almost zero conductor loss have been widely studied. However, a conventional dielectric resonator antenna having a uniform dielectric radiates through both the top wall and the side wall, resulting in a relatively low gain.
In order to meet the development requirement of high gain, methods for improving the gain of dielectric resonator antennas have been widely studied, and the methods can be mainly classified into three categories. Among them, the most common method is to integrate a dielectric resonator antenna with a short horn. Another approach is to increase the radiation of the dielectric resonator sidewalls by using a multilayer stacked anisotropic resonator, or engraving grooves on opposite sidewalls of the dielectric resonator. Furthermore, due to the multi-mode characteristics, designing dielectric resonator antennas to operate in higher order modes is an effective way to achieve gain enhancement. However, most antennas implemented by the above methods have a complicated structure or a high profile, which will be an obstacle in some space-limited applications of dielectric resonator antennas. The advent of the quasi-planar dielectric patch antenna has effectively solved the above-mentioned problems. On the one hand, due to the anisotropy of the dielectric patch resonator, the radiation of the antenna mainly comes from the sidewalls, similar to the radiation mechanism of a microstrip patch antenna. This means that the dielectric patch antenna can have a relatively high gain while maintaining a low profile. On the other hand, the dielectric patch antenna not only has high radiation efficiency comparable to that of the dielectric resonator antenna, but also inherits multimode characteristics. Higher order modes of the dielectric patch resonator can be used to achieve bandwidth expansion, gain enhancement or to create natural radiating nulls in the design of the filter antenna. It has been found that a dielectric patch antenna is a good compromise between a microstrip patch antenna and a dielectric resonator antenna.
The dual-polarized antenna can not only effectively reduce the multipath effect, but also increase the capacity of the communication channel, and has been widely used in recent years. For dual polarized antennas, it is important to achieve a high degree of isolation between the two input ports. To meet this requirement, various differentially fed dual polarized antennas have been extensively studied to achieve their desirable performance, such as high immunity to common mode hostile noise, symmetric radiation patterns, harmonic rejection, etc. In the patent of 'a high-gain differential dual-polarized dielectric patch antenna based on a higher-order mode' applied by the applicant, the invention relates to a differential-fed dual-polarized dielectric patch antenna working in the higher-order mode, and four ground rods are introduced into a resonator to realize a gain of up to 9 dBi, but the bandwidth is less than 5%, so that the development requirement of broadband cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-gain differential dual-polarized antenna based on a hollow dielectric patch resonator, which has a simple structure. The dielectric patch resonator has the advantages that the anisotropic structure and the multimode characteristic of the dielectric patch resonator are benefited, a square hole is formed in the substrate right below the dielectric patch to obtain the hollow dielectric patch resonator, electromagnetic radiation from the side wall of the dielectric patch resonator can be increased to further improve gain, and the main mode TM is enabled101The mode is moved upwards to be close to the higher order mode TM121And modes, thereby realizing bandwidth expansion.
In order to achieve the purpose of the invention, the high-gain differential dual-polarized antenna based on the hollow dielectric patch resonator provided by the invention comprises a lower dielectric substrate, a metal reflective floor, an upper dielectric substrate and a dielectric patch which are sequentially stacked from bottom to top, wherein the lower surface of the lower dielectric substrate is provided with two pairs of mutually orthogonal microstrip feeder lines for coupling feed, the metal reflective floor is provided with coupling slots corresponding to the microstrip feeder lines one by one, and the microstrip feeder lines excite the dielectric patch through the coupling slots, and the high-gain differential dual-polarized antenna is characterized in that: the upper medium substrate is provided with a square hole which is positioned right below the medium patch, the square hole and the medium patch are fused to form a hollow medium patch resonator, and the projection of the edge of the square hole on an XY plane (the plane where the medium patch is positioned) is between the coupling gap and the outer edge of the medium patch.
The invention provides a differential feed dual-polarized antenna using a hollow dielectric patch resonator for the first time. According to analysis of the relationship between the anisotropic characteristic and the gain of the dielectric patch antenna, a square hole is constructed below the dielectric patch so as to obtain the hollow dielectric patch resonator. It not only increases the electromagnetic radiation from the sidewalls of the dielectric patch resonator to further improve gain, but also enables the main mode TM101The mode is moved upwards to be close to the higher order mode TM121Mode, thereby enabling bandwidth extension. To achieve dual polarization while increasing isolation, two pairs of identical differential feeds are used to excite the TM101Mode, TM121A mode and its corresponding degenerate mode.
Drawings
The invention will be further described with reference to the accompanying drawings;
fig. 1 is an exploded view of an antenna according to an embodiment of the present invention.
Fig. 2 is a top view of an antenna according to an embodiment of the present invention.
Fig. 3 is a bottom view of an antenna according to an embodiment of the present invention.
Fig. 4 is a graph of reflection coefficient and gain for an antenna excited only by port 1 in accordance with an embodiment of the present invention.
Fig. 5 is a graph of reflection coefficient and gain for an antenna excited only by port 2 according to an embodiment of the present invention.
Fig. 6 is a graph of the isolation between port 1 and port 2 of an antenna of an embodiment of the present invention.
Fig. 7 is an antenna radiation pattern at a frequency of 5.48 GHz when the antenna of an embodiment of the present invention is excited only by port 1.
Fig. 8 is an antenna radiation pattern at a frequency of 6.18 GHz when the antenna of an embodiment of the present invention is excited only by port 1.
Fig. 9 is an antenna radiation pattern at a frequency of 5.48 GHz when the antenna of an embodiment of the present invention is excited only by port 2.
Fig. 10 is an antenna radiation pattern at a frequency of 6.18 GHz when an antenna of an embodiment of the present invention is excited only by port 2.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1 to fig. 3, the differential feeding dual-polarized dielectric patch antenna of the present embodiment is sequentially stacked from bottom to top and provided with a lower dielectric substrate 5, a metal reflective floor 4, an upper dielectric substrate 3, and a square dielectric patch 1. The dielectric constant of the square dielectric patch 1 isrd= 45, loss tangenttan= 1.9×10-4Volume isl d×l d×h d. The lower dielectric substrate 5 and the upper dielectric substrate 3 both use Rogers RO4003 and have a dielectric constant ofrs3.38, loss tangent oftan＝ 2.7×10-3Volume isl g×l g×h s. In order to obtain a relatively high gain, a volume ofl c×l c×h sAnd the square hole 2 is fused with the dielectric patch 1 to form the hollow dielectric patch resonator. The lower surface of the lower dielectric substrate 5 is printed with two pairs of mutually orthogonal microstrip feed lines 6 (sized to be of a size of x-axis and y-axis) for coupling feeding placed face to facew f×l f) The metal reflective floor 4 on the upper surface of the lower dielectric substrate 5 is provided with coupling slots 7 (with the size of being equal to that of the microstrip feeder lines 6) corresponding to the microstrip feeder lines 6 one by onew s×l s) With respect to the distance between the two coupling gaps ofd sTwo pairs of equal-amplitude and opposite-phase radio frequency signals are transmitted along two pairs of microstrip feeder lines respectively to excite the dielectric patch 1 so as to realize differential feed. As can be seen from the figure, the edges of the square hole 2 are on the XY planeThe projection of (2) is between the coupling gap 7 and the edge of the dielectric patch 1, that is, the coupling gap 7 is exposed to the square hole 2, and the dielectric patch 1 completely covers the square hole 2.
In this embodiment, the lower dielectric substrate 5 is a double-sided printed circuit board, the top layer of the double-sided printed circuit board is the metal reflective floor 4, and the bottom layer is the microstrip feeder 6. The projection of the microstrip feed line 6 on the metal reflective floor 4 is vertically intersected with the corresponding coupling slot 7; the coupling slots 7 are symmetrically arranged along the center line of the microstrip feed line 6. In fig. 1, reference numeral 8 is a forward signal input end of the port 1, reference numeral 9 is a reverse signal input end of the port 1, reference numeral 10 is a forward signal input end of the port 2, and reference numeral 11 is a reverse signal input end of the port 2. Under the condition of differential feed, two pairs of equal-amplitude reverse radio-frequency signals are transmitted along two pairs of microstrip feed lines respectively, and the excitation of the antenna is realized by utilizing the input differential signals.
The detailed dimensional parameters of the antenna of this embodiment are shown in table I.
TABLE I
Parameter(s) l d h d l g h s w s
Value/mm 30 1.4 52 0.813 2
Parameter(s) l s d s l c w f l f
Value/mm 7.6 18 28 1.8 19
The main mode TM can be found by eigenmode simulation due to the multimode characteristic of the dielectric patch resonator101Mode and higher order mode TM121Mode(s). Due to TM101Mode and TM121The electric field distribution of the modes along the x-axis has a phase difference of 180 DEG, so that the modes can be excited by a pair of equal-amplitude and opposite-phase radio frequency signals provided by a differential feeding mode.
In order to achieve gain enhancement of the dielectric patch antenna, it is necessary to intensively study a relationship between anisotropy of the dielectric patch resonator and reflection coefficients of the top wall and the side wall. RxAnd RzRespectively representing the reflection coefficients of the top and sidewalls of the dielectric patch resonator. When R isx＞RzWhile the electromagnetic radiation of the dielectric patch antenna comes mainly from the side walls, R, of the resonatorx/RzThe larger the value of (a), the higher the gain of the dielectric patch antenna. Rx/RzWill followrd/rsThe value of (the ratio of the dielectric constant of the dielectric patch to the dielectric constant of the substrate) increases. To further increase the gain of the antenna, a square hole as shown in fig. 1 is formed under the dielectric patch to increase the sizerd/rsThe value of (c). At the same time, because of the main mode TM101The electric field of the modes is mainly distributed along the z-axis, while the higher order modes TM121The electric field of the mode is mainly confined inside the dielectric patch and thusrd/rsIs paired with TM101The frequency of the modes is more affected. Introduction of a square hole enables TM101The frequency of the mode is shifted from 5.14 GHz to 5.48 GHz and matched with TM121And modes are combined, so that the bandwidth of the antenna is expanded.
FIGS. 4 and 5 show the reflection coefficient (| S) of the antenna when excited at ports 1 and 2, respectively11|) and gain. Impedance bandwidth (| S) of Port 1 and Port 211|<-10 dB) is 18.6% (5.24-6.32 GHz). The in-band gain is stable, and the maximum gain values of the port 1 and the port 2 reach 9.1 dBi. Fig. 6 is a graph of the isolation between port 1 and port 2 of an antenna of an embodiment of the present invention, with a minimum isolation of 48 dB over the entire operating band. FIG. 7 shows an embodiment of the present invention in which the antenna is excited only by Port 1E-plane and H-plane radiation patterns at 5.48 GHz and 6.18 GHz. Fig. 8 is an E-plane and H-plane radiation pattern at 5.48 GHz and 6.18 GHz when an antenna of an embodiment of the invention is excited only by port 2. The cross polarization of the antenna is below-30 dB. According to the results, the differential dual-polarization dielectric patch antenna has stable and relatively high in-band gain, wide impedance bandwidth, high isolation and low cross polarization.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims (6)

1. The utility model provides a high-gain difference dual polarized antenna based on hollow dielectric patch resonator, includes from bottom to top stacks gradually and sets up down dielectric substrate (5), metal reflection floor (4), goes up dielectric substrate (3) and dielectric patch (1), the lower surface of dielectric substrate (5) is equipped with two pairs of mutually orthogonal be used for the microstrip feeder (6) of coupling feed down, and coupling gap (7) with microstrip feeder (6) one-to-one are seted up in metal reflection floor (4), and microstrip feeder (6) are encouraged dielectric patch (1) through coupling gap (7), its characterized in that: the upper medium substrate (3) is provided with a square hole (2) located right below the medium patch (1), the square hole (2) and the medium patch (1) are fused to form a hollow medium patch resonator, and the projection of the edge of the square hole (2) on an XY plane is between the coupling gap (7) and the edge of the medium patch (1).
2. The high-gain differential dual-polarized antenna based on the hollow dielectric patch resonator is characterized in that: the coupling gap (7) is exposed to the square hole (2), and the medium patch (1) completely covers the square hole (2).
3. The high-gain differential dual-polarized antenna based on the hollow dielectric patch resonator is characterized in that: the projection of the microstrip feed line (6) on the metal reflective floor (4) is vertically intersected with the corresponding coupling slot (7).
4. The high-gain differential dual-polarized antenna based on the hollow dielectric patch resonator is characterized in that: the coupling slots (7) are symmetrically arranged along the center line of the microstrip feeder line (6).
5. The high-gain differential dual-polarized antenna based on the hollow dielectric patch resonator is characterized in that: the lower medium substrate (5) is a double-sided printed circuit board, the top layer of the double-sided printed circuit board is the metal reflection floor (4), and the bottom layer of the double-sided printed circuit board is the microstrip feeder line (6).
6. The high-gain differential dual-polarized antenna based on the hollow dielectric patch resonator is characterized in that: the dielectric patch (1) is a square dielectric patch and is positioned at the center of the upper dielectric substrate (2), and the shape of the dielectric patch (1) is symmetrical along two polarization directions of the antenna.
CN202010825897.7A 2020-08-17 2020-08-17 High-gain differential dual-polarized antenna based on hollow dielectric patch resonator Active CN111969313B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010825897.7A CN111969313B (en) 2020-08-17 2020-08-17 High-gain differential dual-polarized antenna based on hollow dielectric patch resonator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010825897.7A CN111969313B (en) 2020-08-17 2020-08-17 High-gain differential dual-polarized antenna based on hollow dielectric patch resonator

Publications (2)

Publication Number Publication Date
CN111969313A true CN111969313A (en) 2020-11-20
CN111969313B CN111969313B (en) 2022-11-25

Family

ID=73389060

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010825897.7A Active CN111969313B (en) 2020-08-17 2020-08-17 High-gain differential dual-polarized antenna based on hollow dielectric patch resonator

Country Status (1)

Country Link
CN (1) CN111969313B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113193370A (en) * 2021-04-28 2021-07-30 电子科技大学 Self-duplex dielectric resonator antenna based on mode orthogonality
CN113690606A (en) * 2021-09-02 2021-11-23 南通大学 Frequency-reconfigurable broadband enhanced dielectric patch antenna
CN113991293A (en) * 2021-10-28 2022-01-28 南通大学 Square broadband high-gain dielectric bipolar electromagnetic dipole antenna
WO2022142962A1 (en) * 2020-12-29 2022-07-07 南通大学 Integrated structure of differential dielectric resonator antenna and separately controllable dual-passband filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040169604A1 (en) * 2003-02-27 2004-09-02 Lee Jong Moon Broadband slot antenna and slot array antenna using the same
CN109193125A (en) * 2018-08-01 2019-01-11 南通大学 Single feedback circularly polarized dielectric resonator antenna
CN110676589A (en) * 2019-09-16 2020-01-10 南通大学 High-gain differential dual-polarized dielectric patch antenna based on higher-order mode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040169604A1 (en) * 2003-02-27 2004-09-02 Lee Jong Moon Broadband slot antenna and slot array antenna using the same
CN109193125A (en) * 2018-08-01 2019-01-11 南通大学 Single feedback circularly polarized dielectric resonator antenna
CN110676589A (en) * 2019-09-16 2020-01-10 南通大学 High-gain differential dual-polarized dielectric patch antenna based on higher-order mode

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022142962A1 (en) * 2020-12-29 2022-07-07 南通大学 Integrated structure of differential dielectric resonator antenna and separately controllable dual-passband filter
CN113193370A (en) * 2021-04-28 2021-07-30 电子科技大学 Self-duplex dielectric resonator antenna based on mode orthogonality
CN113193370B (en) * 2021-04-28 2022-10-14 电子科技大学 Self-duplex dielectric resonator antenna based on mode orthogonality
CN113690606A (en) * 2021-09-02 2021-11-23 南通大学 Frequency-reconfigurable broadband enhanced dielectric patch antenna
CN113690606B (en) * 2021-09-02 2023-06-16 南通大学 Frequency reconfigurable broadband enhanced dielectric patch antenna
CN113991293A (en) * 2021-10-28 2022-01-28 南通大学 Square broadband high-gain dielectric bipolar electromagnetic dipole antenna

Also Published As

Publication number Publication date
CN111969313B (en) 2022-11-25

Similar Documents

Publication Publication Date Title
CN108847521B (en) Broadband differential feed microstrip filter antenna
CN111969313B (en) High-gain differential dual-polarized antenna based on hollow dielectric patch resonator
CN110165404B (en) Broadband low-profile dielectric patch antenna with anisotropic characteristics
CN110911839B (en) 5G dual-band high-isolation dual-port common-ground monopole antenna
CN110676589B (en) High-gain differential dual-polarized dielectric patch antenna based on higher-order mode
CN106469848B (en) A kind of broadband paster antenna based on double resonance mode
CN111883916A (en) Broadband low-profile dielectric patch filtering antenna based on double-slit feed structure
CN110768011B (en) High-gain CPW differential antenna with single-layer broadband filtering function integrated
CN109193147B (en) Low-profile filtering antenna adopting grooved dielectric patch
CN113922075B (en) Slow wave substrate integrated waveguide duplex antenna based on high-order mode
CN111525246B (en) Low-profile circularly polarized dielectric patch antenna with bandwidth expansion characteristic
CN109713434B (en) Millimeter wave differential coplanar feed dielectric antenna
CN110911805B (en) Miniaturized dual-frequency dual-polarization 5G base station antenna with high isolation and high harmonic suppression
CN113506976B (en) High-gain circularly polarized antenna and wireless communication device
CN113809518B (en) Microwave and millimeter wave large-frequency ratio common-aperture antenna with high isolation
CN111463562B (en) Ultra-wideband differential feed PIFA antenna with filtering effect
CN115579611B (en) Metal +/-45-degree dual-polarized antenna
Tang et al. Differentially SIW TE 20-mode Fed substrate integrated filtering dielectric resonator antenna for 5G millimeter wave application
CN113794043B (en) Dual-frenquency dual polarization filtering basic station antenna
CN113922073B (en) Compact high-gain single-feed millimeter wave back cavity patch filter antenna
CN114937868A (en) Millimeter wave substrate integrated medium filter antenna with integrated waveguide feed
CN111541018B (en) High-gain steep filtering fusion duplex integrated antenna
CN115332787A (en) Four-port high-isolation MIMO antenna
CN109742539B (en) Patch antenna with broadband and filtering characteristics
CN114122713A (en) SIW differential feed circularly polarized antenna array

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant