KR101775828B1 - Antenna having H type coupler specialized for band structure using Characteristic Mode - Google Patents

Abstract

The present invention relates to an antenna. More specifically, the present invention relates to an antenna having an H-type coupler utilizing a characteristic mode. The antenna can be intuitively designed by using current as a coupler specialized for a band-type structure. The antenna also can promote an increase in communication channels and improvement in performance of beamforming or the like by easily realizing a multi-input multi-output (MIMO) by using the characteristic mode. The antenna comprises: a ground substrate; a band having the H-type coupler for a feeding unit; and a pad formed to adjust a frequency in the middle of the H-type coupler or to match impedance.

Description

[0001] The present invention relates to an antenna having an H-type coupler specialized in a band structure utilizing a characteristic mode,

The present invention relates to an antenna, and more particularly, to an antenna having an H-type coupler specialized in a band structure utilizing a characteristic mode.

The characteristic mode refers to any type of current distribution that can occur on the structure surface for a particular frequency f when there is an arbitrary electrical structure. This characteristic mode exists independently of the external power source, and the mode most similar to the electric form of the excitation power source outside the structure is most strongly radiated in all the modes.

The mode numbers are arranged in a lower number as the resonance is better for a certain frequency f, and the electric fields generated by the respective modes are orthogonal to each other, so they are useful for creating a multi-input multi-output (MIMO) system It is an antenna design technique.

Various feed structures for using the characteristic mode of the structure have been proposed, but most of them have complex field characteristics, which are difficult to reflect the structure in actual design and are not intuitive.

1. Korean Registered Utility Model No. 20-0336816 (December 24, 2003) (entitled Microstrip patch antenna with H-slot)

1. Choi, Won-Jun et al., "Design and Fabrication of H-shaped Slot Antenna with Bazooka Balun for WiBro Repeater", Journal of the Institute of Electronics Engineers of Korea, Vol. 45, No. 1, January 2008, pp.78-84 The Journal of the Korea Electromagnetic Engineering Society v.19, no. 5, vol. 132 (May 2008) pp.515-522 2. Park, Kee-Dong, "Modified H-slot open-coupled circularly polarized microstrip antennas for 2.4GHz ISM band" Korean Institute of Communication Sciences, 37 (3), 109p ~ 114p, 2012

It is an object of the present invention to provide an antenna having an H-type coupler specialized in a band structure utilizing a characteristic mode using a current characteristic instead of a complicated electric field characteristic .

Another object of the present invention is to provide an antenna having an H-type coupler specialized in a band structure utilizing an intuitive characteristic mode which is easy to reflect a structure in actual design.

The present invention provides an antenna having a H-type coupler specialized in a band structure utilizing a characteristic mode using a current characteristic instead of a complicated electric field characteristic in order to achieve the above-described object.

In the antenna having the H-type coupler,

A ground substrate 201;

A band 210 having an H-type coupler 220 stacked on one side of the ground substrate 201 for applying a desired mode by adjusting correlation with the characteristic mode and having a H-type coupler 220 for the feed unit 230;

And a pad 240 formed in the middle of the H-type coupler for adjusting a frequency or for impedance matching.

The H-type coupler 220 may have a slot shape in which the openings 221 and 222 are formed in the band 210.

The band may be plane or curved.

In this mode, a desired mode is generated by controlling the phase of the feed signal of the H-type coupler to adjust the similarity with the characteristic mode of the band structure.

Also, in the mode, a desired mode is generated by adjusting the position of the H-type structure coupler and adjusting the similarity with the characteristic mode of the band structure.

In addition, a common element may be coupled to the pad 240 to adjust the frequency.

Also, the frequency band may be formed by adjusting the slot length of the H type coupler.

Also, the position of the H-type coupler 220 may be changed to generate the mode 2.

On the other hand, another embodiment of the present invention includes a ground substrate 201; And is stacked on one side plane of the ground substrate 201 to form a desired multi-input multi output (MIMO) system by adjusting the correlation with the characteristic mode, A band 210 having a plurality of H-shaped couplers 220 disposed therein; And a pad 240 formed in the middle of the H-type coupler for frequency adjustment or impedance matching. The H-shaped coupler may be provided with a H-shaped coupler specialized in a band structure utilizing the characteristic mode.

According to the present invention, there is an advantage that an intuitive design is possible because current is used as a coupler specialized in a band-like structure.

Another advantage of the present invention is that a multi-input multi-output (MIMO) system can be easily implemented using a characteristic mode, thereby improving the performance of a communication channel increase and beam-forming.

Further, as another effect of the present invention, the band structure can operate well even in a bent curved surface shape, not a flat surface, because it is a structure for controlling current, which is applicable to a wearable device such as a smart band.

Fig. 1 is a diagram showing the distribution of modes 1 and 2, which are resonance modes, of characteristic modes of a general band-like structure.
2 is a plan view of an antenna 200 having an H-type coupler structure according to an embodiment of the present invention.
FIG. 3 is a view showing a current distribution pattern generated by the H-type coupler structure of the antenna 200 shown in FIG.
FIG. 4 is a view showing a mode form existing in a general band structure.
FIG. 5 is a view comparing a radiation pattern of a characteristic mode 1 of a general band-type structure and a radiation pattern by applying an H-type coupler structure according to an embodiment of the present invention.
FIG. 6 is a diagram comparing a radiation pattern with a characteristic mode 2 of a general band-type structure and a radiation pattern by applying two H-type coupler structures according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating an example of generating a pattern of modes 1 and 2 by implementing a MIMO system on a band-like structure using all of the H-type coupler structures applied in FIGS. 5 and 6. FIG.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Should not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an antenna having an H-type coupler specialized in a band structure utilizing a characteristic mode according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a diagram showing the distribution of mode 1 (110) and mode 2 (120), which are resonance modes, of characteristic modes of a general band structure. Referring to FIG. 1, it can be seen that the first mode 110 and the second mode 120 are strongly generated along the edge of the band.

In the case of applying the characteristic mode technique to a narrow band-like structure as shown in FIG. 1, one mode of the present invention is applied to a case where most modes are generated along a band edge, It is the proposed coupling structure.

2 is a plan view of an antenna 200 having an H-type coupler structure according to an embodiment of the present invention. Referring to FIG. 2, FIG. 2 shows a H-type coupler structure proposed in an embodiment of the present invention. In addition, the antenna 200 has a band 210 on which a H-type coupler 220 is formed on a ground substrate 201. A pad 240 is formed in the middle of the H type coupler 220. The H type coupler 220 is formed of two long first and second slots 221 and 222 and a third slot 223 connecting the middle of the first and second slots 221 and 222 in a transverse direction.

Since the antenna 200 shown in FIG. 2 has substantially the same electrical configuration as that of the general band-shaped structure shown in FIG. 1, a mode existing on the surface of the band can be effectively used by using the structure. In addition, there is a characteristic of feeding across the middle of the H-type coupler 220 shown in FIG. 2, and a pad 240 is placed in the middle to adjust the frequency by using a capacitor or an inductor, which is a lumped element. Or impedance matching. In other words, a feeding part 230 for feeding is constituted.

In general, the characteristic mode refers to any type of current distribution that can occur on a structure surface for a particular frequency f when there is an arbitrary electrical structure. This characteristic mode exists independently of the external power source, and the mode most similar to the electric form of the excitation power source outside the structure is most strongly radiated in all the modes.

FIG. 3 is a view showing a current distribution pattern generated by the H-type coupler structure of the antenna 200 shown in FIG. 3, in order to generate the current distribution to the left and right outer sides of the H-type coupler structure, the feeding part 230 protrudes to the center of the structure, and the feeding part 230 includes an input part 310 and a + input part 320 ). (Input signal) and - (a signal delayed 180 degrees in phase with the input signal) to the input-input unit 310 and the + input unit 320, respectively. The pad 240 of the power feeder 230 may be impedance-matched using a commercial device or the like.

FIG. 4 is a view showing a mode form existing in a general band structure. Referring to FIG. 4, when a signal having a phase opposite to that of + and ?? is excited to the feeding part of the H type coupler structure, a current is generated along the outer part of the H type coupler structure. This allows excitation of the resonance mode in accordance with the characteristic mode of the band structure distributed along the edge. This means that the band itself can be used as an antenna, and it is advantageous that the structure can be made more compact and communication performance can be achieved.

FIG. 5 is a view comparing a radiation pattern of a characteristic mode 1 of a general band-type structure and a radiation pattern by applying an H-type coupler structure according to an embodiment of the present invention. 5, when a H type coupler structure is used, it can be seen that a radiation pattern almost identical to the radiation pattern of the mode 1 of the band structure is generated. This effectively applies the resonance mode of the band structure .

FIG. 6 is a diagram comparing a radiation pattern with a characteristic mode 2 of a general band-type structure and a radiation pattern by applying two H-type coupler structures according to an embodiment of the present invention. Referring to FIG. 6, mode 2 can be generated by adjusting the position of the H type coupler structure.

FIG. 7 is a diagram illustrating an example of generating a pattern of modes 1 and 2 by implementing a multi-input multiple output (MIMO) system on a band-like structure using all of the H-type coupler structures applied in FIG. 5 and FIG. Referring to FIG. 7, as shown in FIG. 6, a MIMO system can be easily configured by applying it. In this case, the respective electric fields are orthogonal to each other, so there is no interference.

200: antenna
201: Ground substrate
210: Band
220: H type coupler
221, 222:
230: Feeding part
240: Pad
310: - input
320: + input section

Claims (9)

A ground substrate 201;
A band 210 stacked on one side of the ground substrate 201 for generating a mode similar to the characteristic mode to generate a desired characteristic mode and having an H type coupler 220 for the feed part 230;
And a pad 240 formed in the middle of the H-type coupler for adjusting a frequency or for impedance matching,
The H-type coupler 220 has a slot shape in which opening surfaces 221 and 222 are formed in the band 210,
And a common element is coupled to the pad 240 for adjusting the frequency or for impedance matching. The antenna having the H-type coupler specialized in the band structure utilizing the characteristic mode.
delete The method according to claim 1,
Wherein said band is planar or curved. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,
Type coupler is adjusted to a mode similar to the characteristic mode of the band-type structure, and a desired mode is generated by adjusting the phase of the feed signal of the H-type coupler. .
The method according to claim 1,
Wherein the mode is adjusted to a mode similar to the characteristic mode of the band type structure by adjusting the position of the H type coupler, so that a desired mode is generated.
delete The method according to claim 1,
And the band of the frequency is adjusted by adjusting a slot shape length of the H type coupler.
The method according to claim 1,
And the position of the H-type coupler 220 is changed to generate a mode 2. The H-shaped coupler according to claim 1,
A ground substrate 201;
And generates a mode similar to the characteristic mode in order to generate a desired characteristic mode and is stacked on one side plane of the ground substrate 201 to form a multi input multiple output (MIMO) A band 210 having a plurality of H-shaped couplers 220 disposed at intervals;
And a pad 240 formed in the middle of the H-type coupler for adjusting a frequency or for impedance matching,
The H-type coupler 220 has a slot shape in which opening surfaces 221 and 222 are formed in the band 210,
And a common element is coupled to the pad 240 for adjusting the frequency or for impedance matching. The antenna having the H-type coupler specialized in the band structure utilizing the characteristic mode.

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