KR20160045649A - Multilayer ceramic circular polarized antenna having a Stub parasitic element - Google Patents

Multilayer ceramic circular polarized antenna having a Stub parasitic element Download PDF

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KR20160045649A
KR20160045649A KR1020160043235A KR20160043235A KR20160045649A KR 20160045649 A KR20160045649 A KR 20160045649A KR 1020160043235 A KR1020160043235 A KR 1020160043235A KR 20160043235 A KR20160043235 A KR 20160043235A KR 20160045649 A KR20160045649 A KR 20160045649A
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ceramic
antenna
dielectric
parasitic element
ceramic dielectric
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KR1020160043235A
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Korean (ko)
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KR101746475B1 (en
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이은형
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에이피위성통신주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0485—Dielectric resonator antennas
    • H01Q9/0492—Dielectric resonator antennas circularly polarised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • 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
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • 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
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
    • H01Q9/0435—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave using two feed points

Abstract

The present invention forms a parasitic element on the top surface of a stacked dual ceramic dielectric and power supplied to the radiating element of a circular ring structure formed between the first ceramic dielectric and the second ceramic dielectric is formed between the radiating element and the parasitic element The second high dielectric constant dielectric ceramic material induces electric power to the parasitic element by electromagnetic coupling, thereby improving the antenna's wide bandwidth and gain.
A feeding part for supplying a double probe is formed on the lower surface of the dielectric substrate, and dual polarization of Left Hand Circular Polarization (LHCP) and Right Hand Circular Polarization (RHCP) And an open stub is formed at one side of the parasitic element so that the phase induced by the electromagnetic coupling is stabilized by the capacitive reactance.

Description

[0001] The present invention relates to a stacked ceramic circularly polarized antenna having a stub parasitic element,

The present invention relates to a laminated ceramic circularly polarized antenna having a stub parasitic element, and more particularly to a low-gain antenna for use in a satellite navigation apparatus such as GPS or Glonass, A high gain of more than 3dBic and a broadband characteristic of 135.5 MHz or more.

Therefore, a parasitic element is formed on the upper surface of the radiating element to improve the broadband and gain of the antenna, stabilize the phase by the open stub, To a laminated ceramic circularly polarized antenna having a stub parasitic element for smooth satellite communication as well as reception of satellite navigation data such as GPS or Glonass by generating polarized waves.

Due to the development of wireless communication technology, the popularization of information communication devices such as mobile phones and navigation is rapidly penetrating deep into human life.

The IoT (grounded Internet) ground and satellite communication market, where many control technologies are currently being developed, is emerging as a new innovation industry in the 21st century in many fields.

The antenna of the present invention is a communication antenna for satellite IoT, and may be mounted on a marine structure equipment such as a life jacket. In an area where there is no base station for terrestrial mobile communication, a Bluetooth or WiFi The present invention provides a small antenna that can be applied to a portable satellite communication module that enables satellite communication with a smart phone using communication.

1 is a view showing an embodiment of a ceramic circular patch antenna of the prior art.

1, a grounding portion 10 and a ceramic dielectric 13 having a predetermined thickness are formed on the upper surface of the dielectric substrate 11, and a radiation (not shown) formed on the upper surface of the ceramic dielectric 13 And a power feeding part 12 formed on the lower surface of the dielectric substrate 11.

The power feeding part 12 is a Wilkinson power divider structure having two outputs on one input and a? G / 4 transmission line having a characteristic impedance of 50? On one of the two outputs, So that a signal having a phase difference of 90 DEG divided in half is output to the two output terminals.

The two output terminals whose phases are different by 90 degrees are electrically connected to the radiation patch 14 by two feed pins provided inside the through holes of the dielectric substrate 11, the ground 10 and the ceramic dielectric 13 And a circular polarization is generated in a phase shifted by 90 degrees by the? G / 4 transmission line.

However, since such a Wilkinson power divider is a three-terminal structure, it has two inputs and one output, or one input and two outputs. Therefore, in order to realize the circular polarization of the antenna, 4 transmission line is required to be installed only at one of the output ends of the output terminals, it is possible to implement only a single polarization antenna that is a left-handed circular polarization or right-handed circular polarization.

8 is a view showing a 2D radiation pattern of a ceramic circular patch antenna according to the prior art.

As shown in FIG. 8, the prior art ceramic circular patch antenna is a single radiation patch 14 structure, and it can be seen in the radiation pattern 900 that the maximum gain of the antenna does not reach more than 0 dBic.

Although the dielectric constant ( r ) of the ceramic dielectric used in the conventional ceramic circular patch antenna according to the prior art uses a material having a high dielectric constant of 21, a ceramic material having a dielectric constant of 21 is difficult to process and is expensive It is a material which is not commercialized.

In addition, since GPS antennas, including the prior art ceramic circular patch antenna, are a single radiation patch 14 structure, it is possible to receive satellite signals as a low gain antenna due to low radiation efficiency, but it is impossible to realize high gain dual polarization, There is a technical problem that is impossible for satellite communication for signal transmission and reception.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a dual-polarity waveguide circuit for a dual- And a stub parasitic element including an open stub on one side of the parasitic element and a gain enhancement due to a wide band characteristic and a high radiation efficiency.

According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, including: forming a first ceramic dielectric and a second ceramic dielectric on a top surface of the ground by using an upper surface of the dielectric substrate as a grounding portion of the antenna; A radiating element formed on an upper surface of the first ceramic dielectric; And a feeding part formed on a lower surface of the dielectric substrate, the parasitic element including an open stub on an upper surface of the second ceramic dielectric.

According to an aspect of the present invention, two output terminals of the feeder are electrically connected to the radiating element formed on the upper surface of the first ceramic dielectric through a feed pin.

According to an aspect of the present invention, there is provided a method of manufacturing a ceramic dielectric device, comprising the steps of: bonding a first ceramic dielectric body and a second ceramic dielectric body to each other using a double-sided tape; The phases of the two output terminals have a phase difference of 90 ° with respect to each other and are transmitted to the radiating element. A signal having a phase difference of 90 ° generates both left-handed and right-handed circularly polarized waves.

As described above, the present invention has the effect of enhancing the broadband characteristic and the antenna gain by stacking the high dielectric constant ceramic dielectric body and forming the parasitic element formed at the upper end of the radiating element.

In addition, since it has a structure using a commonly used high permittivity ceramic material, it has a merit that the price of an antenna can be remarkably lowered, so that it is a high-gain small-size broadband antenna and can have sufficient competitiveness in the satellite communication IoT market.

In addition, the capacitive reactance is induced by the open stub formed on one side of the parasitic element to stabilize the phase, and simultaneously the left circular polarization and the right circular polarization due to the feeding of the double probe in the feeding part are generated.

It will be understood by those skilled in the art that the technical structure of the microstrip line is not described in the following description of the embodiments of the present invention, The description of the microstrip line is omitted.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows an embodiment of a ceramic circular patch antenna of the prior art; Fig.
2 (a), 2 (b) and 2 (c) are views showing an example of the detailed structure of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.
3 is an exploded perspective view of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.
4 (a) and 4 (b) are views showing an upper surface and a lower surface, which are one example of a detailed configuration of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.
5 is a view showing an isolation diagram of a resonance frequency band and a feeding point of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.
6 is a 2D radiation pattern of a stacked ceramic circularly polarized antenna with a stub parasitic element according to the present invention.
FIG. 7 is a graph showing a 3D radiation pattern of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention,
8 is a 2D radiation pattern of a ceramic circular patch antenna according to the prior art.

Hereinafter, preferred embodiments of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concept of the term appropriately in order to describe its own invention in the best way. It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Therefore, the embodiments described in the present invention and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, various equivalents It should be understood that water and variations may be present.

2 (a), 2 (b) and 2 (c) are views showing an example of the detailed configuration of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.

2, the first ceramic dielectric 200 includes a dielectric substrate 110, a ground unit 100, a first ceramic dielectric 200, a second ceramic dielectric 500, and a parasitic element 510, Sided tape 400 is formed and fixed between the first ceramic dielectric 500 and the second ceramic dielectric 500 and the power feeder 120 is provided on the lower surface of the dielectric substrate 200.

The power feeder 120 is a branch line coupler having a four terminal structure and is a circuit having two inputs and two outputs. When a signal is input to either one of the two inputs, the amplitudes are the same A signal having a phase difference of 90 degrees is output.

Since the isolation between the two inputs is greater than about 20dB, no signal is present at the other input.

Here, the first and second ceramic dielectrics 200 and 500 have a dielectric constant ( r ) of 12, a loss tangent (Tan delta) of 0.0016, and an area of 45 x 45 mm 2, O 3 ) material is used.

3 is an exploded perspective view of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.

Referring to FIG. 3, a grounding part 100 is formed on the upper surface of the dielectric substrate 110, and a feeding part 120 for feeding a double probe is formed on the lower surface of the dielectric substrate 110.

A first high dielectric constant ceramic dielectric body 200 having a predetermined thickness is formed on the upper end of the grounding portion 100 and a radiating element 210 having a circular ring structure is formed on the upper surface of the first ceramic dielectric body 200 . A first feed pin 310 and a second feed pin 320 are formed at one side of the radiating element 210 at a predetermined angle with respect to the center axis of the radiating element 210, The pins 310 and 320 pass through the first feed hole 111 to the third feed hole 211 to electrically connect the two output terminals of the feeder 120 and the radiating element 210. Since the positions of the first and second feeding pins 310 and 320 for feeding the double probes cause a great change in the radiation resistance of the antenna, the positions of the first feeding pin 310 and the second feeding pin 320 It is preferable to maintain an appropriate angle so that the angle does not exceed 90 [deg.].

The two second feeding holes 101 formed in the grounding portion 100 are electrically connected to the first and second feed pins 310 and 320 so as not to be electrically connected to the first and second feed pins 310 and 320 ). ≪ / RTI >

When signals having the same amplitude are inputted to the two input terminals of the feed part 120, the signals are transmitted to the radiating element 210 through the first and second feed pins 310 and 320 and transmitted to the radiating element 210 The signal is induced in the parasitic element 510 by electromagnetic coupling and is copied to the free space. The parasitic element 510 is formed on the upper surface of the second ceramic dielectric 500 and the first and second ceramic dielectrics 200 and 500 are fixed by a double-sided tape 400 having a thickness of 0.01 mm.

The first ceramic dielectric 200 is formed to have a thickness smaller than that of the second ceramic dielectric 500 to improve the axial ratio and radiation property of the antenna and to reduce the thickness of the first ceramic dielectric 200, It is more preferable that the thickness of the second ceramic dielectric 500 is formed thicker than the first ceramic dielectric 200 in order to widen the narrowed bandwidth.

The parasitic element 510 induces a broadband characteristic by matching the input impedance by electromagnetic coupling between the second ceramic dielectric 500 having a high dielectric constant and the radiating element 210, The increase of the insertion loss due to the fringing effect and the distorted radiation characteristic and the polarization characteristic induce the capacitive reactance by the four open stubs 511 formed on one side of the parasitic element 510, It is possible to obtain a high gain by increasing the radiation efficiency of the antenna.

4 (a) and 4 (b) are top and bottom views illustrating an example of a detailed configuration of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.

Referring to FIG. 4, a feeding part 120 having a phase difference of 90 degrees between the output phases is formed on the lower surface of the dielectric substrate 110 to generate a circularly polarized wave.

When an input signal is applied to the first feed point 121 to generate a left circularly polarized wave, a phase signal 90 degrees behind the input phase is transmitted to the first feed pin 310 and 180 degrees The first feed pin 310 and the second feed pin 320 have the same amplitude and have a phase difference of 90 ° with respect to each other so that the phase of the first feed pin 310 is 90 ° ahead And thus generates a left-handed circular polarization.

When an input signal is applied to the second feed point 122 to generate the right circular polarization, a phase signal 90 degrees behind the input phase is transmitted to the second feed pin 320, The second feed pin 320 and the first feed pin 310 have the same amplitude and a phase difference of 90 ° is generated between them, so that the phase of the second feed pin 320 is 90 Because it is ahead, it generates right circular polarization.

At this time, an insertion loss of -3 dB is present in the first feed pin 310 and the second feed pin 320, and an insertion loss is generated in the first feed pin 310 and the second feed pin 320 at one side of the first and second feed pins 310 and 320 And further includes a stub for impedance matching.

Dielectric substrate 110 is the dielectric constant (ε r) is 4.1, and the loss tangent (Tanδ) is 0.0035, and the thickness 0.508㎜, size by using a teflon substrate 55 × 55㎟ reduce the size of the power supply portion 120, It is more preferable that the insertion loss is satisfied.

The diameter of the parasitic element 510 is formed larger by 0.0137? Than the outer diameter of the radiating element 210 in the corresponding frequency band and the inner diameter of the radiating element 210 is formed to be 0.048? And has a high isolation property between the second feeding points 122.

5 is a view showing an isolation diagram of a resonance frequency band and a feed point of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.

5, since the satellite communication antenna of the present invention requires a wide band characteristic, the frequency band has a bandwidth of 8.5.5% of 135.5 MHz from 1.525 GHz to 1.6605 GHz, which is an L-band band, and the reflection loss characteristic 610) has a characteristic of maintaining a standing wave ratio of 1.3 or less at a minimum of -18 dB.

In addition, the isolation between input feed points, which is Polarization Isolation between the left circular polarization and the right circular polarization, is -19.8 dB to 25.3 dB, which shows a good isolation characteristic (600).

6 is a 2D radiation pattern of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.

6, a radiation pattern 700 of a left-handed circular polarization and a right-handed circular polarization is generated in a band from 1.525 GHz to 1.6605 GHz where a broadband characteristic for satellite communication is required. The maximum gain of the antenna is 4.2 dBic (710) And has a wide elevation direction half power beam width (HPBW) of 106 ° (that is, ± 53 °) based on 0 ° which is the maximum gain direction.

7 is a 3D radiation pattern of a laminated ceramic circularly polarized antenna having a stub parasitic element according to the present invention.

Referring to FIG. 7, the radiation pattern of the laminated ceramic circularly polarized antenna having the stub parasitic element has a hemispherical omnidirectional radiation pattern characteristic with respect to the Z axis. In the present invention, Although only the left-handed circularly polarized radiation pattern is shown in the figure, it should be noted that the dual-probe feeding structure has the same right and left circularly polarized radiation pattern.

The present invention has been described with reference to the preferred embodiments.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

120: feeding part 200: first ceramic dielectric
210: radiating element 310: first feeding pin
320: second feed pin 500: second ceramic dielectric
510: Parasitic element 511: Open stub

Claims (20)

In a multilayer ceramic antenna having a parasitic element,
A dielectric substrate having a predetermined thickness and a dielectric constant;
A power feeder formed on a lower surface of the dielectric substrate and controlling power and phase;
A grounding portion formed on an upper surface of the dielectric substrate;
A first ceramic dielectric formed on the ground; And
And a radiating element formed on an upper surface of the first ceramic dielectric,
A second ceramic dielectric formed on the first ceramic dielectric and inducing a broadband characteristic by input impedance matching;
A parasitic element formed on the upper surface of the second ceramic dielectric and improving the gain of the antenna; And
And an open stub formed on one side of the parasitic element. The method according to claim 1,
Wherein the dielectric substrate comprises:
Wherein the laminated ceramic circularly polarized antenna has a dielectric constant (? R ) of 4.1, a loss tangent (Tan?) Of 0.0035, a thickness of 0.508 mm and a size of 55 mm 55 mm. The method according to claim 1,
Wherein the power-
Wherein the dielectric substrate is a branch line coupler circuit formed on a lower surface of the dielectric substrate and controlling input power and the two output terminals have a phase difference of 90 DEG with respect to each other. The method according to claim 1,
Wherein the first ceramic dielectric comprises:
Wherein the second ceramic dielectric is formed to have a thickness thinner than that of the second ceramic dielectric to improve the axial ratio and radiation characteristic of the antenna. The method according to claim 1 or 4,
Wherein the first ceramic dielectric comprises:
Wherein the thickness is 2.2 mm, and the length and the length are 45 x 45 mm 2. 6. The method of claim 5,
Wherein the first ceramic dielectric comprises:
A laminated ceramic circularly polarized antenna having a stub parasitic element characterized in that it has a dielectric constant (? R ) of 12, a loss tangent (Tan?) Of 0.0016, and a commonly used commercial alumina (Al 2 O 3 ) material. The method according to claim 1,
The radiating element
Wherein the first ceramic dielectric is formed in a circular ring structure on an upper surface of the first ceramic dielectric. 8. The method of claim 7,
The circular ring may include:
Wherein the outer diameter is 0.185 lambda and the inner diameter is 0.048 lambda to induce high isolation characteristics between the two feed points. The method according to claim 1,
Wherein the second ceramic dielectric comprises:
Wherein the first ceramic dielectric is formed thicker than the first ceramic dielectric in order to induce a broadband characteristic for a narrowed bandwidth due to the thinned first ceramic dielectric formed on the first ceramic dielectric. Laminated Ceramic Circularly Polarized Antenna. 10. The method of claim 1 or 9,
Wherein the second ceramic dielectric comprises:
Wherein the thickness of the laminated ceramic circularly polarized antenna is 4.3 mm, and the length and the length of the laminated ceramic circularly polarized antenna are 45 x 45 mm 2. 11. The method of claim 10,
Wherein the second ceramic dielectric comprises:
A laminated ceramic circularly polarized antenna having a stub parasitic element characterized in that it has a dielectric constant (? R ) of 12, a loss tangent (Tan?) Of 0.0016, and a commonly used commercial alumina (Al 2 O 3 ) material. The method according to claim 1,
The parasitic element includes:
Wherein the second ceramic dielectric is formed on the upper surface of the second ceramic dielectric and enhances the antenna gain by increasing the radiation efficiency by input impedance matching by electromagnetic coupling with the radiating element to increase the antenna gain. . 13. The method according to claim 1 or 12,
The parasitic element includes:
Wherein the outer diameter of the radiating element is larger than the outer diameter of the radiating element by 0.0137 lambda. The method according to claim 1,
The open stub includes:
Wherein the parasitic element is formed by a plurality of spaced distances and predetermined lengths on one side of the parasitic element, and the increased insertion loss and distorted radiation and polarization characteristics of the second ceramic dielectric, And inducing a reactance to increase the radiation efficiency by stabilizing the input phase. The stator parasitic element according to claim 1, In a multilayer ceramic antenna having a parasitic element,
Antenna for satellite communication IoT (Internet of Things)
Wherein the antenna has a band width of 1.55 GHz to 1.6605 GHz and has a bandwidth of 8.5% and accommodates left-handed circular polarization. In a multilayer ceramic antenna having a parasitic element,
Antenna for satellite communication IoT (Internet of Things)
Wherein the antenna has a GPS frequency band of 1575.42 MHz, a Glonass frequency band of 1602 MHz, and an L-band frequency bandwidth used in a plurality of satellite navigation devices, and receives right circular polarization. In a multilayer ceramic antenna having a parasitic element,
A first feed pin; And a second feed pin;
The first feed pin and the second feed pin may be connected to each other,
Two first feeding holes formed on one side of the dielectric substrate;
Two second feeding holes formed on one side of the ground portion;
A third feeding hole formed on one side of the first ceramic dielectric; And
And a fourth feeding hole formed on one side of the radiating element to electrically connect the radiating element having a circular ring structure and the feeding part for feeding the double probe through the inside of the fourth feeding hole, Ceramic circularly polarized antenna. 18. The method of claim 17,
And the second feed hole
Wherein the first and second feed pins are formed to be larger in diameter than the first and second feed pins so as not to be electrically connected to the first and second feed pins. 18. The method of claim 17,
The first feed pin and the second feed pin may be connected to each other,
And a predetermined distance and a predetermined angle with respect to a central axis of the radiating element,
Wherein an angle of the antenna is within 45 占 to 90 占 considering the radiation resistance of the antenna. 18. The method of claim 17,
Wherein the power-
Wherein the branch line coupler is a branch line coupler for feeding a double probe to generate a circular polarization of the antenna.
KR1020160043235A 2016-04-08 2016-04-08 Multilayer ceramic circular polarized antenna having a Stub parasitic element KR101746475B1 (en)

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