KR101699287B1 - Frequency tunable half mode substrate integragted waveguide and method for manufacturing thereof - Google Patents

Frequency tunable half mode substrate integragted waveguide and method for manufacturing thereof Download PDF

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KR101699287B1
KR101699287B1 KR1020150154679A KR20150154679A KR101699287B1 KR 101699287 B1 KR101699287 B1 KR 101699287B1 KR 1020150154679 A KR1020150154679 A KR 1020150154679A KR 20150154679 A KR20150154679 A KR 20150154679A KR 101699287 B1 KR101699287 B1 KR 101699287B1
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microstrip patch
liquid metal
frequency
fluid
hole
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임성준
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중앙대학교 산학협력단
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    • 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
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/2002—Dielectric waveguide filters
    • 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
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/206—Microstrip transmission line antennas

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Abstract

The present invention relates to a frequency-variable half mode substrate integrated waveguide antenna and a manufacturing method thereof. The present invention includes: a dielectric substrate; a rectangular micro-strip patch formed on the upper surface of the dielectric substrate, and including first and second horizontal sides, longer than vertical sides, and first and second vertical sides; a plurality of via holes formed in the micro-strip patch, and arranged along the first horizontal side and the first and second vertical sides; a fluid hole formed in the micro-strip patch, placed at a predetermine distance from the second horizontal side, and storing liquid metal; and a feeding line connected with the micro-strip patch. As such, the present invention is capable of switching a resonant frequency by injecting or removing the liquid metal through the fluid hole.

Description

TECHNICAL FIELD [0001] The present invention relates to a frequency variable half-mode substrate integrated waveguide antenna, and a manufacturing method thereof. BACKGROUND OF THE INVENTION [0002]

The present invention relates to a frequency variable half-mode substrate integrated waveguide antenna, and more particularly, to an antenna technology capable of switching a resonant frequency by injecting or removing liquid metal through a fluid hole.

Reconfigurable antennas are emerging technologies in next generation wireless communication systems. New protocols and applications are constantly being developed, and multifunctional or adaptive antennas in different frequency bands and polarizations are required.

Reconfigurable antennas include a pattern reconstruction antenna, a polarization reconstruction antenna, a frequency reconstruction antenna, etc., and are used in applications including an adaptive communication system, and a single reconstruction antenna is functionally replacing multiple antennas.

Many researches have been made on frequency reconfigurable antennas, and various variable devices have been applied to antenna devices.

For example, PIN diodes have been used to fabricate frequency tunable microstrip antennas and bowtie antennas, and have been used to introduce radio frequency microelectromechanical systems (RF MEMS), ferroelectric thin films, Various techniques have been used, including the use of varactor diodes.

As one of these techniques, the present invention proposes a method of switching the resonant frequency band of the frequency variable half-mode substrate integrated waveguide antenna by using a liquid metal such as EGaIn.

Korean Patent Publication No. 10-2014-0037416 entitled "Substrate Integrated Waveguide Coupler" (published on March 27, 2014)

SUMMARY OF THE INVENTION [0006] In view of the above, it is an object of the present invention to provide a frequency-variable half-mode substrate integrated waveguide antenna capable of switching an operating frequency band by injecting or removing a liquid metal by forming a fluid hole and a method of manufacturing the same. do.

According to another aspect of the present invention, there is provided a frequency-variable half-mode integrated-circuit waveguide antenna comprising: a dielectric substrate; a dielectric substrate formed on the dielectric substrate and having first and second transverse sides and first and second longitudinal sides, A plurality of via holes formed in the microstrip patch and arranged along the first transverse side and the first and second longitudinal sides, the microstrip patch comprising: a rectangular microstrip patch having a lateral side longer than the longitudinal side; A fluid hole formed in the microstrip patch and spaced apart from the second side by a predetermined gap, and a feed hole connected to the microstrip patch.

The frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention further includes a ground portion formed on a lower surface of the dielectric substrate.

According to an embodiment of the present invention, the hole for fluid is formed at a vertical position at a midpoint between the second transverse sides.

In addition, the fluid hole according to an embodiment of the present invention is formed at a position where the variable frequency range of the antenna is maximized.

In addition, the fluid hole according to an embodiment of the present invention is formed at a position where the maximum gain value of the antenna is maximized.

The frequency variable half mode substrate integrated waveguide antenna according to an embodiment of the present invention is characterized in that the resonant frequency can be switched as the liquid metal is injected into or removed from the hole for the fluid.

Further, the liquid metal according to an embodiment of the present invention is characterized by being EGaIn.

The frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention further includes a pump for injecting or removing the liquid metal.

The feeding line may be connected to one end of a longitudinal side of the microstrip patch, and may have a quadrangular cutout at a position in contact with the microstrip patch for impedance matching.

According to another aspect of the present invention, there is provided a method of fabricating a frequency-variable half-mode integrated-circuit waveguide antenna, the method including forming first and second transverse sides, first and second longitudinal sides, Forming a plurality of via holes along the first transverse side and the first and second longitudinal sides of the microstrip patch; and forming a plurality of via holes in the first transverse side and the first and second longitudinal sides of the microstrip patch, And forming a hole for fluid to be spaced apart from the second transverse side of the microstrip patch by a predetermined gap and to receive the liquid metal.

According to another aspect of the present invention, there is provided a method of fabricating a frequency-variable half-mode integrated-circuit waveguide antenna, the method comprising the steps of: bonding a ground portion to the other surface of the dielectric substrate.

It can be seen that the frequency variable half mode substrate integrated waveguide antenna according to the embodiment of the present invention exhibits a very excellent frequency variable range and maximum gain range as compared with other antennas using PIN diodes, MEMS switches, varactor diodes, .

In addition, the use of EGaIn as the liquid metal has an advantage of excellent stability.

Also, by injecting or removing liquid metal into the fluid channel using a pump, the resonant frequency of the antenna can be simply switched.

1 is a plan view illustrating an upper structure of a frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention.
FIG. 2 is a graph illustrating a simulation result of variation of a frequency variable range and a maximum gain according to a vertical position of a fluid hole in a frequency variable half mode substrate integrated waveguide antenna according to an embodiment of the present invention.
FIG. 3 is a graph illustrating a simulation result of reflection coefficients according to the presence of a fluid hole and a liquid metal in a frequency variable half-mode substrate integrated waveguide antenna,
4 is a graph showing an electric field distribution according to the presence of a fluid hole and a liquid metal in a frequency variable half mode substrate integrated waveguide antenna.
FIG. 5 is a graph illustrating the measurement and simulation of a change in reflection coefficient caused by injecting a liquid metal into a hole for a fluid of a frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention.
6A is a gain radiation pattern in the xz and yz planes simulated and measured at 2.33 GHz of a frequency variable half-mode integrated-waveguide antenna in which no liquid hole is filled with liquid metal,
6B is a gain radiation pattern in the xz and yz planes simulated and measured at 3.35 GHz of a frequency variable half mode integrated waveguide antenna with a liquid metal injected fluid hole formed therein.
7A is a photograph showing a frequency variable half mode substrate integrated waveguide antenna with a fluid hole according to an embodiment of the present invention,
7B is a photograph showing a frequency variable half mode substrate integrated waveguide antenna in which a liquid metal is injected into a hole for a fluid according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. 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.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Substrate Integrated Waveguide is easy to integrate into microwave and millimeter wave circuits because it is advantageous in size, weight, volume, manufacturing cost and other transmission lines. In recent years, It is widely used.

Many types of substrate integrated waveguide array antennas have been designed and manufactured for use today. Typical examples include a substrate integrated slot array antenna and a half mode substrate integrated waveguide (HMSIW) antenna.

1 is a plan view illustrating an upper structure of a frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention.

1, the frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention includes a dielectric substrate 110, a microstrip patch 120, a plurality of via holes 130, (140), and the like.

The dielectric substrate 110 may be made of a material commonly used in the art such as epoxy, duroid, Teflon, bakelite, high resistance silicon, glass, alumina, LTCC, air foam, So that the microstrip patch 120 or the planar conductor 160 to be described later is insulated from the external environment.

The dielectric substrate 110 preferably has a plate shape having a length and a length that is longer than the height, but the shape and size of the substrate are not limited thereto and may be various shapes such as a cylinder, a square column, and a polygonal column.

The microstrip patches 120 are formed on the upper surface of the dielectric substrate 110 and may have a rectangular shape.

Specifically, the microstrip patch 120 includes first and second transverse sides 121 and 122 and first and second longitudinal sides 123 and 124, and the transverse side is a rectangle having a longer length than the longitudinal side Shape.

The micro-strip patch 120 may have a plurality of via holes 130 arranged along the side surface and spaced apart from each other at regular intervals. The via holes 130 may correspond to metal vias and may be continuously arranged to form a virtual conductor wall.

A plurality of via holes 130 according to an embodiment of the present invention may be formed along the first transverse side 121 and the first and second longitudinal sides 123 and 124 of the microstrip patch 120 , A virtual conductor wall can be formed by keeping the gap between vias and vias below a certain level in consideration of the wavelength of the operating frequency. A ground portion may be formed on the lower surface of the dielectric substrate 110.

In the drawing, the first and second transverse sides 121 and 122 have a length a and the first and second longitudinal sides 123 and 124 have a length b.

A hole 140 for the fluid may be formed in the microstrip patch 120 and may provide a vertical space for receiving the liquid metal.

It is preferable that a plurality of via holes 130 are formed along three sides of the microstrip patch 120 and the fluid holes 140 are spaced apart from a side where the via holes 130 are not formed with a predetermined gap Do.

When the via hole 130 is formed along the first transverse side 121 and the first and second longitudinal sides 123 and 124, the fluid hole 140 is formed in the via hole 130 So as to be close to the second transverse side 122 on which no imaginary conductor wall is formed.

At this time, the fluid hole 140 may be formed at a vertical position at an intermediate point of the second side 122 in consideration of symmetry.

In the drawing, the fluid hole 140 is formed at a position spaced apart by x in the vertical direction y by a distance x along the first transverse side 121 with the lower left end of the microstrip patch 120 as an origin (o) And the resonant frequency of the antenna can be switched as the liquid metal is injected into or removed from the hole 140 for the fluid.

For smooth switching of the resonance frequency, it is preferable that the hole 140 for fluid is formed at a position where these values are maximized in consideration of the variable range of the antenna and the maximum gain.

Compared with other frequency tunable antennas, the frequency variable half mode substrate integrated waveguide antenna according to an embodiment of the present invention can easily switch the resonant frequency by introducing the conductive posts into which the liquid metal is injected.

In order to make this approach possible, it is necessary to control the shape change of the injected liquid metal so that the reaction is fast and predictable.

The frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention uses EGaIn (eutectic gallium-indium) as the liquid metal.

EGaIn is a liquid metal at a room temperature of 15.5 degrees Celsius, and is advantageous in stability compared to mercury, which has a volatile and thin structure due to its harmful and unstable structure. Since the oxide film does not become thicker over time, performance can be maintained for a long time when EGaIn is injected into the hole 140 for the fluid.

In addition, the EGaIn has a low viscosity and has an advantage that it can be rapidly injected into the hole 140 for fluid by applying pressure at room temperature.

According to an embodiment of the present invention, a pump such as a syringe or a vacuum pump for applying pressure to inject or remove the liquid metal may be additionally installed in the hole 140 for the fluid.

The frequency variable half mode substrate integrated waveguide antenna according to an embodiment of the present invention may include a feed line 150 connected to the microstrip patch 120.

Generally, a transition structure is required to excite a signal to a frequency variable half-mode substrate integrated waveguide antenna. By controlling the width and length of a transition structure, reflection loss can be minimized.

The feeding line 150 according to an embodiment of the present invention is connected to one end of a longitudinal side of the microstrip patch 120 and has a rectangular shape removing part 160 at a position in contact with the microstrip patch 120 for impedance matching May be formed.

In the drawing, the height of the removal unit 160 is denoted by u and the width is denoted by v, and the structure may have a fine structure in the origin direction.

Hereinafter, the antenna according to the present invention will be described in more detail with reference to embodiments of the present invention. However, these examples are for illustrative purposes only, and the scope of the present invention is not limited to these examples.

When the thickness of the substrate integrated waveguide antenna cavity according to an embodiment of the present invention is smaller than the width W SIW and height L SIW of the microstrip patch 120, the resonant frequency of the substrate integrated waveguide antenna is expressed by Equation 1 Lt; / RTI >

[Equation 1]

Figure 112015107497783-pat00001

Here, epsilon and mu represent the permittivity and permeability of the dielectric material, respectively, and m and n represent the mode order of the substrate integrated waveguide cavity, respectively.

parameter Size (mm) a 65 b 29.2 x 32 d 4 y 4 W M 4.8 W L 24 u 1.95 v 2.2 n One m 2

Table 1 is a table showing numerical parameters of an HMSIW antenna according to an embodiment of the present invention.

In order to manufacture a frequency-variable half mode substrate integrated waveguide antenna according to an embodiment of the present invention, first and second transverse sides 121 and 122 and first and second longitudinal sides 123 and 123 are formed on one surface of a dielectric substrate 110, 124), and a rectangular microstrip patch 120 having a lateral side longer than a longitudinal side is formed.

According to one embodiment of the present invention, a Rogers Duroid 5880 substrate is used as the dielectric substrate 110. The dielectric constant of the substrate is 2.2 and the thickness is 1.575 mm.

The half-mode substrate-integrated waveguide cavity was designed to have 65 mm and 29.2 mm for each of W SIW and L SIW so as to have a main resonant frequency at 2.3 GHz.

At this time, a plurality of via holes 130 are formed along the first transverse side 121 of the microstrip patch 120 and the first and second longitudinal sides 123 and 124.

The open side of the half mode substrate integrated waveguide antenna where the plurality of via holes 130 are not formed has a fringe effect that appears to be larger than the original physical dimension so that L SIW is slightly smaller than half of W SIW .

Then, a hole 140 for fluid is formed to be spaced apart from the second transverse side 122 of the microstrip patch 120 by a predetermined gap and to receive the liquid metal. At this time, the ground portion may be bonded to the other surface of the dielectric substrate 110.

The hole 140 for the fluid has a diameter d of 4 mm and is formed approximately at the midpoint of the transverse sides of the microstrip patch 120 to maintain symmetry.

The fluid holes 140 were arranged by the via holes 130 so as to be close to open sides where no virtual conductor walls were formed. Specifically, the fluid hole 140 is formed at a position where a frequency variable range and a peak gain of the antenna are maximized through simulation.

The frequency variable range can be calculated by the following equation (2).

[Equation 2]

Figure 112015107497783-pat00002

Here, f c represents the average of the highest frequency f 1 and the lowest frequency f 2 .

FIG. 2 is a graph illustrating a simulation result of variation of a frequency variable range and a maximum gain according to a vertical position of a fluid hole in a frequency variable half mode substrate integrated waveguide antenna according to an embodiment of the present invention.

For simulation, commercial software, ANSYS High Frequency Structure Simulator (HFSS), was used.

2, the vertical position y of the fluid hole 140 is changed from 2 mm to 6 mm. When the vertical position (y) is 4 mm, the widest frequency variable range is shown. .

FIG. 3 is a graph of a reflection coefficient according to the presence of fluid holes and liquid metals in a frequency variable half-mode substrate integrated waveguide antenna. FIG. And the electric field distribution according to the presence.

3, the resonant frequency of the frequency variable half mode substrate integrated waveguide antenna without the fluid hole 140 is 2.35 GHz, the resonance frequency of the frequency variable half mode substrate integrated waveguide antenna having the fluid hole 140 Is measured at 2.33 GHz, it can be seen that the presence or absence of the hole 140 for the fluid hardly affects the resonance frequency.

4 (a) and 4 (b), the antenna a having the hollow hole 140 for fluid is formed with the antenna b without the hole 140 for fluid, It can be seen that distortion of the electric field distribution is largely generated in the antenna (c) into which the liquid metal is injected into the fluid hole (140).

The resonance frequency of the antenna in which the liquid metal is injected into the hole for fluid 140 is measured to be 3.35 GHz. Therefore, by injecting the liquid metal into the hole for fluid 140, the resonance frequency of the antenna is switched from 2.33 GHz to 3.35 GHz .

In addition, the variable frequency range of 39.56% was maintained while maintaining impedance matching higher than -10 dB. By simply injecting or removing the liquid metal into the hole for fluid 140 using a pump or the like, the resonance frequency can be easily switched can do.

FIG. 5 is a graph illustrating the measurement and simulation of a change in reflection coefficient caused by injecting a liquid metal into a hole for a fluid of a frequency-variable half-mode substrate integrated waveguide antenna according to an embodiment of the present invention.

Referring to FIG. 5, it can be seen that the measurement results and the simulation results are substantially in agreement, and the EGaIn liquid metal is injected into the fluid hole 140, and the frequency variation range is about 39.56%, and 2.33 GHz to 3.35 GHz It was confirmed that a resonance frequency shift occurred.

FIG. 6A is a radiation pattern in the xz and yz planes simulated and measured at 2.33 GHz of a frequency variable half-mode integrated-waveguide antenna in which no hole for a liquid metal-injected fluid is formed, and FIG. Is a radiation pattern in the xz and yz planes simulated and measured at 3.35 GHz of a frequency variable half-mode substrate integrated waveguide antenna in which holes are formed.

Referring to FIGS. 6A and 6B, the simulated radiation pattern and the measured radiation patterns (E? And E?) Appear similar to each other, and the measured maximum gain was 4.54 dBi at 2.33 GHz and 5.05 dBi at 3.35 GHz. This gain variation is reasonable when compared to other reconstructed antennas.

Figure 112015107497783-pat00003

Table 2 is a table comparing characteristics of an antenna according to an embodiment of the present invention and a conventional antenna.

(Comparative Example 1: LI, T., ZHAI, H., WANG, X., LI, L., LIANG, C .: IEEE Antennas & Wireless: Frequency-reconfigurable bow-tie antenna for Bluetooth, WiMAX, Propagation Letter, 2015, vol. 14, no. 1, pp. 171-174.

Comparative Example 2: RAJAGOPALAN, H., KOVITZ, J. M., RAHMAT-SAMII, Y .: MEMS reconfigurable optimized E-shaped patch antenna design for cognitive radio. IEEE Transactions on Antennas & Propagation, 2014, vol. 62, no. 3, pp. 1056-1064.

Comparative Example 3: MEMON, M.U., LIM, S .: Frequency-tunable compact antenna using quarter-mode substrate integrated wave-guide. IEEE Antennas & Wireless Propagation Letter, 2015, vol. PP, no. 99, pp. 1-1.

Comparative Example 4: KANG, H., LIM, S .: Electrically small dual-band reconfigurable complementary split-ring resonator (CSRR) -loaded eighth-mode substrate integrated waveguide (EMSIW) antenna. IEEE Transactions on Antennas & Propagation, 2014, vol. 62, no. 5, pp. 2368-2373.

Comparative Example 5: KHAN, M. R., HAYES, G. J., SO, J. H., GIANLUCA, D. L., MICHAEL, D .: A frequency shifting liquid metal antenna with pressure responsiveness. Applied Physics. Letter, 2011, 99, 013501.)

As can be seen from the above table, the frequency variable half mode substrate integrated waveguide antenna according to the embodiment of the present invention exhibits relatively superior characteristics as compared with other antennas using PIN diodes, MEMS switches, varactor diodes, etc. In particular, it can be confirmed that the frequency variable range and the maximum gain range are excellent.

FIG. 7A is a photograph of a frequency variable half mode substrate integrated waveguide antenna with a fluid hole according to an embodiment of the present invention. FIG. And a variable half mode substrate integrated waveguide antenna.

7A and 7B, the connector 170 may be further mounted on the feed line 150, and the resonance frequency may be switched by a simple method of injecting the liquid metal 141 into the hole for the fluid.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

110: dielectric substrate
120: Microstrip patch
121: first road
122: second road
123: 1st longitudinal side
124: 2nd vertical side
130: via hole
140: Fluid hole
141: liquid metal
150: feed line
160: Remove
170: Connector

Claims (11)

A dielectric substrate;
A rectangular microstrip patch formed on an upper surface of the dielectric substrate and having first and second transverse sides and first and second longitudinal sides, the transverse side being longer than the longitudinal side;
A plurality of via holes formed in the microstrip patch and arranged along the first transverse side and the first and second longitudinal sides;
A fluid hole formed in the microstrip patch and spaced apart from the second transverse side by a predetermined gap, for receiving liquid metal; And
And a feeding line connected to the microstrip patch.
The method according to claim 1,
And a grounding portion formed on the lower surface of the dielectric substrate.
The method according to claim 1,
And the fluid hole is formed at a vertical position at a midpoint of the second transverse side.
The method according to claim 1,
Wherein the fluid hole is formed at a position where the variable frequency range of the antenna is maximized.
The method according to claim 1,
Wherein the fluid hole is formed at a position where the maximum gain of the antenna is maximized.
The method according to claim 1,
And the resonant frequency can be switched by injecting or removing the liquid metal into the hole for the fluid.
The method according to claim 6,
Wherein the liquid metal is EGaIn. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 6,
Further comprising a pump for injecting or removing the liquid metal.
The method according to claim 1,
Wherein the feed line is connected to one end of a longitudinal side of the microstrip patch,
And a quadrangular demarcating portion is formed at a position in contact with the microstrip patch for impedance matching.
Forming a rectangular microstrip patch including first and second transverse sides and first and second longitudinal sides on one surface of the dielectric substrate and having a transverse side longer than a longitudinal side;
Forming a plurality of via holes along the first transverse side and the first and second longitudinal sides of the microstrip patch; And
And forming a hole for fluid to be spaced apart from the second side of the microstrip patch by a predetermined gap and to receive the liquid metal. ≪ Desc / Clms Page number 19 >
11. The method of claim 10,
Further comprising the step of bonding a ground portion to the other surface of the dielectric substrate. ≪ RTI ID = 0.0 > 11. < / RTI >
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CN110729538A (en) * 2019-11-07 2020-01-24 电子科技大学 Miniaturized ultra wide band-pass filter with reconfigurable trapped wave band
CN111146575A (en) * 2020-01-10 2020-05-12 江苏师范大学 Frequency scanning antenna based on half-mode substrate integrated cavity
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CN113964462A (en) * 2021-10-26 2022-01-21 重庆邮电大学 Small broadband phase shifter based on slow-wave half-mode substrate integrated waveguide
CN114725686A (en) * 2022-05-17 2022-07-08 安徽大学 Log-periodic antenna based on half-mode rectangular metal waveguide excitation
CN117525878A (en) * 2023-12-22 2024-02-06 南京邮电大学 Frequency-reconfigurable microfluidic MIMO antenna

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110326159A (en) * 2017-03-27 2019-10-11 英特尔公司 The antenna being integrated into printed circuit board
CN108777354A (en) * 2018-05-25 2018-11-09 南京理工大学 A kind of micro-strip paster antenna based on the load of SIW resonant cavities
CN108777354B (en) * 2018-05-25 2020-01-03 南京理工大学 Microstrip patch antenna based on loading of SIW resonant cavity
CN110729538A (en) * 2019-11-07 2020-01-24 电子科技大学 Miniaturized ultra wide band-pass filter with reconfigurable trapped wave band
CN111146575A (en) * 2020-01-10 2020-05-12 江苏师范大学 Frequency scanning antenna based on half-mode substrate integrated cavity
CN113224489A (en) * 2021-05-07 2021-08-06 杭州电子科技大学 HMSIW filter with independently controllable transmission zero positions
CN113224489B (en) * 2021-05-07 2021-11-02 杭州电子科技大学 HMSIW filter with independently controllable transmission zero positions
CN113964462A (en) * 2021-10-26 2022-01-21 重庆邮电大学 Small broadband phase shifter based on slow-wave half-mode substrate integrated waveguide
CN114725686A (en) * 2022-05-17 2022-07-08 安徽大学 Log-periodic antenna based on half-mode rectangular metal waveguide excitation
CN114725686B (en) * 2022-05-17 2024-03-12 安徽大学 Logarithmic periodic antenna based on half-module rectangular metal waveguide excitation
CN117525878A (en) * 2023-12-22 2024-02-06 南京邮电大学 Frequency-reconfigurable microfluidic MIMO antenna

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