KR101309238B1 - Spidron fractal antenna for multiband - Google Patents

Spidron fractal antenna for multiband Download PDF

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Publication number
KR101309238B1
KR101309238B1 KR1020120088953A KR20120088953A KR101309238B1 KR 101309238 B1 KR101309238 B1 KR 101309238B1 KR 1020120088953 A KR1020120088953 A KR 1020120088953A KR 20120088953 A KR20120088953 A KR 20120088953A KR 101309238 B1 KR101309238 B1 KR 101309238B1
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South Korea
Prior art keywords
antenna
multiband
dielectric substrate
speedron
feed line
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KR1020120088953A
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Korean (ko)
Inventor
황금철
김한별
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동국대학교 산학협력단
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0093—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices having a fractal shape
    • 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
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

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Abstract

PURPOSE: A multi-band spidron fractal antenna is provided to increase maximum profit of antenna by comprising resonant frequency according to high isolation degree characteristic between each port. CONSTITUTION: A multi-band spidron fractal antenna comprises a dielectric substrate (110), a ground plane (120), a slot (130), multiple feed Lines (141, 142), and a reflector (160). The ground plane is formed on the top surface of the dielectric substrate. The slot is formed to have a spidron fractal structure on the ground plane, and implement one or more resonant frequencies. The multiple feed Lines share slot on the lower surface of the dielectric substrate, and are formed by mutually detached. The reflector is formed by being isolated from the lower surface of the dielectric substrate with certain distance. [Reference numerals] (151) Port 1; (152) Port 2

Description

Spider-on antenna for multiband

The present invention relates to a multiband speedron fractal antenna, and more particularly, to a multiband speedron fractal antenna capable of realizing multiband resonance characteristics.

Different types of wireless communication are used to satisfy various needs of the user, and the wireless communication used in this way uses different frequency bands for each service provided. Therefore, in order for a user to use various wireless communication services, a terminal for a frequency band used by each service must be separately provided. Therefore, in order to receive various wireless communication services using only one terminal, a broadband or multi-band antenna technology capable of accommodating all used frequency bands is required. Also, in addition to the mobile communication on the ground, terminals using satellite mobile communication are being researched and developed to accommodate multiple bands instead of single bands.

Although the microstrip patch antenna has a disadvantage of narrow bandwidth, it is widely used in various wireless communication fields due to its thinness, ease of manufacture, and low manufacturing cost.

In order to use such a microstrip patch antenna in a multi-band method, a slit is added to the patch surface of the antenna to insert a diode in the space, and then the resonance frequency is adjusted using the inserted diode, or a multilayer structure is used. I use it. In particular, in order to implement a multi-band antenna, when inducing the characteristics of the multi-band using different feed lines for each frequency band, it should be designed in consideration of the isolation between ports of the feed line. At this time, if the isolation between ports is designed to be low, there is a problem that the signal leaks to the opposite port to make the communication environment poor.

As described above, the prior art of the multiband Pylon Fractal antenna is as follows.

Prior art 1 relates to Korean Patent Laid-Open Publication No. 2003-0054827 (2003.07.02), which relates to a circularly polarized microstrip patch antenna and an array antenna in which the same is sequentially rotated. The prior art 1 includes a first patch antenna layer including a dielectric layer and a ground conductor layer, and radiating energy by exciting current by a power supply means electrically coupled with a first patch located on one surface of the dielectric layer; A second patch antenna layer comprising a dielectric film, the second patch antenna layer radiating energy by exciting a current by the first patch electromagnetically coupled with a second patch located on one surface of the dielectric film; A first foam layer disposed between the first patch antenna layer and the second patch antenna layer to separate the first patch antenna layer and the second patch antenna layer; And a second foam layer disposed on one surface of the second patch antenna layer to protect the second patch antenna layer, thereby improving coupling characteristics between the feeder and the second patch, thereby improving radiation efficiency of the antenna. It has the effect of making it work.

In addition, the prior art 2, Korean Patent Laid-Open No. 2009-0028354 (2009.03.18), relates to a broadband internal antenna combined with a monopole antenna and a loop antenna. The prior art 2 is a broadband internal antenna includes a ground plate and an antenna portion, the antenna portion is connected to the first radiator, the ground plate is formed extending from the other end of the rod-shaped end having a feed point, the feed point in the 'c' shape A grounding point and a grounding point are provided at one end, and the other end is connected to the point where the 'c' shape of the first radiator starts and is formed in an open loop shape. The second radiator is formed in a closed loop shape by protruding from the 'c' shape of the first radiator. It is to provide a broadband internal antenna that can include the frequency of use of a variety of mobile communication services, including a first protrusion to be formed and a second protrusion formed to protrude in an 'inverse L' shape into the open loop shape of the second radiator. Can be.

In order to solve the above problems of the prior art, the present invention is to provide a multi-band Speedron fractal antenna using a dual port sharing one Speedron fractal slot.

According to an aspect of the present invention, there is provided a multiband Kinetic Fractal Fractal Antenna comprising: a dielectric substrate; A ground plane formed on an upper surface of the dielectric substrate; A slot formed on the ground plane to have a Speedron fractal structure to implement at least one resonance frequency; A plurality of feed lines which share the slots and are spaced apart from each other on the lower surface of the dielectric substrate; And a reflective plate spaced apart from the lower surface of the dielectric substrate by a predetermined distance.

More preferably, the isosceles triangle may include a speedron fractal structure in which two or more contiguous triangles are continuously connected.

More preferably, the isosceles triangle may include a Speedron fractal structure in which the isosceles triangle is continuously generated and repeatedly combined while the size thereof changes as the scale factor changes.

More preferably, the first feed line is formed at a position spaced apart by a predetermined distance in the X-axis direction from the point where the vertex of the first isosceles triangle and the vertex of the second isosceles triangle of the Speedron fractal structure; And a second feed line formed at a position spaced a predetermined distance in the Y-axis direction from a point where a vertex of the first isosceles triangle and a second isosceles triangle meet each other. Can be.

In particular, it may include a first feed line that satisfies the frequency band of 5 GHz.

In particular, it may include a second feed line that satisfies the frequency band of 2 GHz.

More preferably, the support member is formed at each corner of the lower surface of the dielectric substrate so that the dielectric substrate and the reflecting plate are spaced apart from each other.

In particular, it may comprise a dielectric substrate having a dielectric constant of 4.6 and a dielectric loss tangent of 0.025.

In particular, it may include a reflecting plate made of a conductor.

The multi-band speedron fractal antenna of the present invention facilitates the resonant frequency of the multi-band according to the high isolation characteristics between each port even if dual ports satisfying different frequency bands share one slot in which one speedron fractal structure is formed. There is an effect that can be implemented.

In addition, the multi-band Speedron fractal antenna of the present invention has an effect of improving the antenna maximum gain by forming a reflector to be spaced a predetermined distance from the lower surface of the dielectric substrate.

In addition, the multi-band Speedron fractal antenna of the present invention has an effect that can be independently adjusted according to the frequency band to be used as a plurality of feed lines to satisfy different bands on the dielectric substrate.

In addition, according to the present invention, as the ports formed on the lower surface of the dielectric substrate have high isolation from each other, the multiband Speedron fractal antenna of the present invention prevents signals from leaking to each port, thereby improving the communication environment. There is.

In addition, the multi-band speedron fractal antenna of the present invention has the effect of enabling the tuning of the independent resonance frequency through each port.

1 is a diagram showing the structure of a multiband kinematic fractal antenna according to an embodiment of the present invention.
2 is a diagram showing an actual implementation of the multiband kinematic fractal antenna of the present invention.
3 is a view illustrating a process of forming a speedron fractal structure of a slot.
FIG. 4 is a graph showing a change in reflection coefficient for each feed line and a change in isolation between the first feed line and the second feed line according to the change in the angle of the isosceles triangle of the Speedron fractal structure.
FIG. 5 is a graph showing a change in reflection coefficient for each feed line and a change in isolation between the first feed line and the second feed line according to the slot length change of the multiband Speedron fractal antenna of the present invention.
6 is a graph showing the maximum gain of an antenna according to whether a reflector is included.
FIG. 7 is a graph illustrating a comparison between a reflection coefficient for each feed line and a simulation value and measured value for isolation between the first feed line and the second feed line according to the present invention.
8 is a diagram illustrating a radiation pattern and a 3D pattern in the XZ plane and the YZ plane of a multiband Pylon Fractal antenna according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, the present invention will be described in detail with reference to preferred embodiments and accompanying drawings, which will be easily understood by those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art, however, that these examples are provided to further illustrate the present invention, and the scope of the present invention is not limited thereto.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: It is to be noted that components are denoted by the same reference numerals even though they are shown in different drawings, and components of different drawings can be cited when necessary in describing the drawings. In the following detailed description of the principles of operation of the preferred embodiments of the present invention, it is to be understood that the present invention is not limited to the details of the known functions and configurations, and other matters may be unnecessarily obscured, A detailed description thereof will be omitted.

Hereinafter, referring to FIG. 1, a multiband speedron fractal antenna according to an exemplary embodiment will be described in detail. FIG.

1 is a diagram showing the structure of a multiband kinematic fractal antenna according to an embodiment of the present invention.

As shown in FIG. 1, in the multi-band speedron fractal antenna 100 of the present invention, a ground plane 120 used as a reference plane for impedance determination of a feed line is formed on an upper surface of the dielectric substrate 110. A slot 130 having a speedron fractal structure is formed in the ground plane 120, and feed lines 141 and 142 are formed on a lower surface of the dielectric substrate 110, and a predetermined length is formed from a lower surface of the dielectric substrate 110. The reflection plate 160 is formed to be spaced apart from each other.

The dielectric substrate 110 may be a thin film PCB substrate having excellent flexibility, such as, for example, glass epoxy (FR-4) or RF-35 substrate, preferably, the thickness t is 1 mm, The relative dielectric constant ε r is 4.6, and the dielectric loss tangent is preferably 0.025.

In this case, the slot 130 has a height h and a spheron fractal structure having an internal angle α. This speedron fractal structure represents a geometrical structure in which the right triangles are alternately combined to mutually contact each other, and have characteristics of self-similarity or self-affinity. Accordingly, the Pylon Fractal structure is formed by repeating and combining the right triangles continuously while the size of the right triangle changes as the scale factor changes.

A plurality of feed lines 141 and 142 are formed on the lower surface of the dielectric substrate 110. The plurality of feed lines 141 and 142 share one slot formed of a Speedron fractal structure, but are spaced apart from each other. Is formed. In particular, the feed lines 141 and 142 include a first feed line 141 and a second feed line 142 satisfying different frequency bands. The first feed line 141 has a width fw1 and a height fh1 at a position separated by fs1 in the X-axis direction from a point where its center meets a vertex of the first isosceles triangle and the second isosceles triangle of the Speedron fractal structure. It is formed to have. In particular, the width fw1 is 1.8 mm, and the height fh1 is preferably formed to have 22.5 mm. In this case, the first feed line 141 satisfies the 5 GHz frequency band of 5.15 GHz to 5.825 GHz.

In addition, the second feed line 142 has a width fw2 and a height fh2 at a position spaced apart by the fs2 in the Y-axis direction from the point where the center meets a vertex of the first isosceles triangle and the second isosceles triangle of the Speedron fractal structure. It is formed to have. In particular, the width fw2 is 1.8 mm, and the height fh2 is preferably formed to have 15.5 mm. At this time, the second feed line 142 satisfies the 2 GHz frequency band of 2.3 GHz to 2.7 GHz.

As such, the first feed line 141 satisfying the 5 GHz band and the second feed line 142 satisfying the 2 GHz band are formed, thereby providing bands of 2.4 GHz to 2.483 GHz and 5.15 GHz to 5.825 GHz. Wireless LAN (WLAN), WiBro providing 2.3 GHz to 2.39 GHz band, WiMAX providing 2.5 GHz to 2.7 GHz band, S-DMB and 2.4 GHz to 2.605 GHz to 2.655 GHz band. It can satisfy both ISM / Bluetooth service bands that provide 2.48 GHz band.

In addition, an SMA connector (port 1 151 and port 2 152) is adhered to the dielectric substrate 110 so that the first feed line 141, the second feed line 142, and the ground plane 120 are attached to the dielectric substrate 110. Is connected to.

In addition, a supporting member having a height k at each corner of the bottom surface of the dielectric substrate 110 so that the reflector 160 is formed at a position spaced a predetermined distance k from the bottom surface of the dielectric substrate 110. ) Is formed, and the reflecting plate 160 is formed to contact the support member. At this time, the reflector 160 is made of a conductor, thereby improving the antenna gain.

The actual implementation of the multi-band speedron fractal antenna of the present invention formed as described above is shown in FIG. 2.

Optimal parameters for each component of the multi-band Speedron fractal antenna are shown in Table 1 below.

parameter value
(Unit: mm) parameter value
(Unit: mm) parameter value
(Unit: mm) h 36.5 fw1 1.8 fw2 1.8 alpha 35.5 ° fh1 22.5 fh2 15.5 t One fs1 33.1 fs2 23.3 k 17 gw 55 gh 55

Hereinafter, the speedron fractal structure formed in the slot will be described in detail with reference to FIG. 3.

3 is a view illustrating a process of forming a speedron fractal structure of a slot.

As shown in FIG. 3 (a), a first isosceles triangle is formed in the slot, and as shown in FIGS. 3 (b) to 3 (c), a plurality of isosceles triangles having different interior angles are alternately formed. Connect two or more times together.

At this time, according to the change of the inner angle α of the first formed right triangle, the size of the continuously coupled triangles is different, and thus the shape of the Speedron fractal structure may be changed.

Hereinafter, an optimal internal angle of the first isosceles triangle of the speedron fractal structure formed in the slot will be described with reference to FIG. 4. FIG.

Figure 4 (a) is a graph showing the change of the reflection coefficient for each feed line according to the change in the internal angle of the isosceles triangle of the Speedron fractal structure, Figure 4 (b) is an isolation between the first feed line and the second feed line It is a graph showing the change.

As shown in FIG. 4, when the angle α of the first isosceles triangle constituting the speedron fractal structure formed in the slot is changed from 35 ° to 35.5 ° and 36 °, the scale factor, or tangent α, also changes. The size of successive isosceles triangles will vary, resulting in a change in the overall shape of the Speedron fractal structure.

The reflection coefficient s11 of port 1 connected to the first feed line, the reflection coefficient s22 of port 2 connected to the second feed line, and the isolation s21 between port 1 and port 2 also change according to the internal angle change of the first isosceles triangle. I can see that. That is, as the angle α of the first isosceles triangle gradually increases, it can be seen that the resonance frequencies of the reflection coefficient s11 of the port 1 and the reflection coefficient s22 of the port 2 gradually decrease. The isolation s21 between the port 1 and the port 2 does not cause a large difference in the low frequency band, but as the frequency band increases, the isolation s21 between the port 1 and the port 2 gradually decreases as the angle α of the first isosceles triangle increases. I can see that.

As a result, it can be seen that when the angle α of the first isosceles triangle is 35.5 °, the reflection coefficient of -10 dB or less is satisfied in the target frequency bands of 2.3 GHz to 2.7 GHz and 5.15 GHz to 5.825 GHz.

In addition, the optimum length h of the isosceles triangle of the speedron fractal structure formed in the slot will be described with reference to FIG. 5.

FIG. 5 is a graph showing a change in reflection coefficient for each feed line and a change in reflection coefficient between a first feed line and a second feed line according to a slot length change of a multi-band Speedron fractal antenna of the present invention.

As shown in FIG. 5, when the length h of the first isosceles triangle of the Speedron fractal structure formed in the slot gradually increases from 35.5 mm to 36.5 mm and 37.5 mm, the aperture size of the entire antenna becomes large, and thus the port 1 It can be seen that the resonant frequencies of the reflection coefficient s11 and the reflection coefficient s22 of the port 2 decrease gradually. In contrast, there is no significant change in isolation s21 between port 1 and port 2, but when the length h of the first isosceles triangle is 36.5 mm, -10 at target frequency bands of 2.3 GHz to 2.7 GHz and 5.15 GHz to 5.825 GHz It can be seen that the reflection coefficient below dB is satisfied.

In this way, it is possible to check whether the maximum gain value of the antenna is changed by dividing the case with and without the reflector with respect to the multiband Pylon Fractal antenna designed with the optimal parameters.

Figure 6 is a graph showing the maximum gain of the antenna with or without a reflector according to the present invention.

As shown in Fig. 6, the graph indicated by the dotted line shows the maximum gain of the multiband speedron fractal antenna without the reflector, and the graph indicated by the solid line shows the maximum gain of the multiband speedron fractal antenna including the reflector. It is shown. Therefore, it can be seen that the maximum gain when the multi-band Speedron fractal antenna of the present invention does not include a reflector is 3.59 dBi at 2.5 GHz and 4.72 dBi at 5.5 GHz. In contrast, however, it can be seen that the maximum gain when the multi-band Pylon Fractal Fractal Antenna of the present invention includes a reflector is 6.69 dBi at 2.5 GHz and 8.56 dBi at 5.5 GHz.

Therefore, when the multi-band Speedron fractal antenna of the present invention includes a reflector, it can be seen that a high gain of at least 3.1 dBi is generated in the 2.3 GHz to 2.7 GHz band range, and at least 2.54 in the 5.1 GHz to 5.8 GHz range. It can be seen that a high gain of more than dBi occurs.

Hereinafter, the reflection coefficient for each port is compared with the simulation value and the measured value by using the multi-band Pytron Fractal Antenna of the present invention with reference to FIG. 7.

FIG. 7 is a graph illustrating a comparison between reflection coefficients of each feed line and isolation simulation values between the first feed line and the second feed line and measured values according to the present invention.

As shown in FIG. 7, the -10 dB reflection coefficient bandwidth simulated in the 2 GHz frequency band is 25.0%, and the measured -10 dB reflection coefficient bandwidth is 24.2%. Also, the simulated -10 dB reflection coefficient bandwidth in the 5 GHz frequency band is 19.7% and the measured -10 dB reflection coefficient bandwidth is 19.0%.

In addition, it can be seen that the isolation s21 between the port 1 and the port 2 has a high isolation characteristic of -16 dB or less in all the measured frequency bands.

7 is a diagram illustrating a radiation pattern and a 3D pattern in the X-Z plane and the Y-Z plane of the antenna according to the present invention.

The experimental results of FIG. 7 show radiation patterns under 2.5 GHz and 5.5 GHz conditions measured in an RF anechoic chamber. In the 2.5 GHz and 5.5 GHz bands, due to the reflector, radio waves radiated to the rear surface are suppressed ( Since it is suppressed, it can be seen that a radiation pattern having directivity in the + Z axis direction is formed.

Embodiments of the present invention may be implemented in the form of program instructions that can be executed on various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

The multi-band speedron fractal antenna according to the present invention has a multi-band resonant frequency according to high isolation characteristics between ports even though dual ports satisfying different frequency bands share one slot in which one speedron fractal structure is formed. There is an effect that can be easily implemented.

In addition, the multi-band Speedron fractal antenna of the present invention has an effect of improving the antenna maximum gain by forming a reflector to be spaced a predetermined distance from the lower surface of the dielectric substrate.

In addition, the multi-band Speedron fractal antenna of the present invention has an effect that can be independently adjusted according to the frequency band to be used as a plurality of feed lines to satisfy different bands on the dielectric substrate.

In addition, according to the present invention, as the ports formed on the lower surface of the dielectric substrate have high isolation from each other, the multiband Speedron fractal antenna of the present invention prevents signals from leaking to each port, thereby improving the communication environment. There is.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and all of the equivalents and equivalents of the claims, as well as the appended claims, will belong to the scope of the present invention. .

110: dielectric substrate 120: ground plane
130: slot 141: first feed line
142: second feed line 151: first port
152: second port 160: reflector

Claims (9)

Dielectric substrates;
A ground plane formed on an upper surface of the dielectric substrate;
A slot formed on the ground plane to have a Speedron fractal structure to implement at least one resonance frequency;
A plurality of feed lines which share the slots and are spaced apart from each other on the lower surface of the dielectric substrate; And
A reflector formed to be spaced apart from the lower surface of the dielectric substrate by a predetermined distance;
Multiband speedron fractal antenna comprising a.
The method of claim 1,
The speedron fractal structure
A multiband speedron fractal antenna, characterized in that an isosceles triangle is combined two or more times in succession.
The method of claim 2,
The speedron fractal structure
And wherein the isosceles triangles are continuously generated and repeatedly combined as their size changes as a scale factor changes.
The method of claim 1,
The feed line
A first feed line formed at a position spaced apart from the point where the vertex of the first isosceles triangle and the vertex of the second isosceles triangle meet by a predetermined distance in the X-axis direction; And
A second feed line formed at a position spaced apart in a Y-axis direction from a point where a vertex of a first isosceles triangle and a vertex of a second isosceles triangle of the Speedron fractal structure meet;
Multi-band speedron fractal antenna comprising a.
5. The method of claim 4,
The first feed line
A multiband speedron fractal antenna, characterized by satisfying a frequency band of 5 GHz.
5. The method of claim 4,
The second feed line
A multiband speedron fractal antenna, characterized by satisfying a frequency band of 2 GHz.
The method of claim 1,
A support member formed at each corner of a lower surface of the dielectric substrate such that the dielectric substrate and the reflector are spaced apart from each other;
Multiband speedron fractal antenna further comprises.
The method of claim 1,
The dielectric substrate
A multiband speedron fractal antenna, characterized in that the dielectric constant is 4.6 and the dielectric loss tangent is 0.025.
The method of claim 1,
The reflector
A multiband speedron fractal antenna, characterized by consisting of conductors.
KR1020120088953A 2012-08-14 2012-08-14 Spidron fractal antenna for multiband KR101309238B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101674139B1 (en) * 2015-09-02 2016-11-08 성균관대학교산학협력단 Broadband circularly polarized antenna using c-shaped slot
KR102172736B1 (en) * 2019-12-23 2020-11-02 성균관대학교 산학협력단 Broadband circularly polarized antenna using t-shaped slot

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060112022A (en) * 2005-04-26 2006-10-31 충남대학교산학협력단 Fylfot typed circular polarization microstrip patch antenna
KR20080093645A (en) * 2007-04-17 2008-10-22 삼성탈레스 주식회사 Directional array structure antenna
KR20090023052A (en) * 2007-08-30 2009-03-04 후지쯔 가부시끼가이샤 Tag antenna and tag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060112022A (en) * 2005-04-26 2006-10-31 충남대학교산학협력단 Fylfot typed circular polarization microstrip patch antenna
KR20080093645A (en) * 2007-04-17 2008-10-22 삼성탈레스 주식회사 Directional array structure antenna
KR20090023052A (en) * 2007-08-30 2009-03-04 후지쯔 가부시끼가이샤 Tag antenna and tag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101674139B1 (en) * 2015-09-02 2016-11-08 성균관대학교산학협력단 Broadband circularly polarized antenna using c-shaped slot
KR102172736B1 (en) * 2019-12-23 2020-11-02 성균관대학교 산학협력단 Broadband circularly polarized antenna using t-shaped slot

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