KR102401957B1 - Broadband characteristic dual band loop type ground radiation antenna - Google Patents

Abstract

A dual-band loop-type ground radiation antenna having broadband characteristics is presented. A dual-band loop-type ground radiation antenna having broadband characteristics according to an embodiment includes a ground portion formed on a substrate; a clearance part configured in at least a part of the ground part; a radiator configured to the side of the clearance unit and both ends connected to the ground unit; a feeding part connected to the grounding part from the middle of the radiator and electromagnetically coupled to a feeding point; a ground connection part disposed in parallel with the feeding part and connected to the ground part at the middle of the radiator; and a first inductive element configured in series with the ground connection part.

Description

Dual-Band Loop-Type Ground Radiation Antenna with Broadband Characteristics

The following embodiments relate to a dual-band loop-type ground radiation antenna, and more particularly, to a dual-band loop-type ground radiation antenna having a broadband characteristic.

The ground radiation antenna is implemented on a printed circuit board (PCB) to utilize the ground as an antenna, and although the price is low, it is difficult to secure the performance of the antenna when the ground of the antenna applied device such as a terminal is small. More specifically, the ground radiation antenna is electromagnetically coupled to the PCB and radiates electromagnetic energy from the PCB to the air. When the PCB is very small compared to the wavelength, the impedance bandwidth becomes narrow.

In the case of the existing dual-band loop-type ground radiation antenna, the low frequency band controls the operating frequency, radiation efficiency, bandwidth, etc. through the capacitor of the power supply loop, the ground and the inductor connected to the radiator, and controls the high frequency band. In this case, the operating frequency, radiation efficiency, and bandwidth were controlled through the capacitor in the feeding loop, the capacitor in the parallel circuit, and the gap capacitance in the end of the radiator.

It is necessary to simultaneously consider the high frequency band radiation efficiency, operating frequency, and bandwidth as well as antenna performance such as low frequency band radiation efficiency, operating frequency, and bandwidth. There is a problem in that it is difficult to optimize and control the bandwidth to the performance desired by the user.

Korean Patent Registration No. 10-1648670 describes a technology related to a dual-band ground radiation antenna using such a loop structure.

Korean Patent No. 10-1648670

The embodiments describe a dual-band loop-type ground radiation antenna having a broadband characteristic, and more specifically, provide a technique for having a wide-band characteristic by adding a concentration element to an existing dual-band loop-type ground radiation antenna.

The embodiments provide a broadband characteristic that can control both the radiation efficiency, operating frequency, and bandwidth of the low and high frequency bands by adding a lumped element inductor other than a capacitor configured in a parallel circuit in the power supply structure of the dual-band loop-type ground radiation antenna. To provide a dual-band loop-type ground radiation antenna having

A dual-band loop-type ground radiation antenna having broadband characteristics according to an embodiment includes a ground portion formed on a substrate; a clearance portion configured to at least a portion of the ground portion; a radiator configured to the side of the clearance unit and both ends connected to the ground unit; a feeding part connected to the ground part at the middle of the radiator and electromagnetically coupled to a feeding point; a ground connection part disposed in parallel with the feeding part and connected to the ground part at the middle of the radiator; and a first inductive element configured in series with the ground connection part.

a first capacitive element connected in series to the power supply unit; and a second capacitive element connected in series to the ground connection part.

A feeding structure may be formed by the first capacitive element and the second capacitive element and the first inductive element connected in parallel to the first capacitive element and the first capacitive element in the feeding part and the ground connection part have.

The first capacitive element and the second capacitive element may be formed of a capacitor to control input impedance.

The device value of the first capacitive element is adjusted to control the performance of a high frequency band among two frequency bands, and the performance and operation of a lower frequency band among the two frequency bands is adjusted by adjusting the element value of the second capacitive element. You can adjust the frequency.

A second inductive element connected in series to one side of the radiator may be further included.

The second inductive element may be formed of an inductor to adjust a resonant frequency of a dual band.

By adjusting element values of the first inductive element and the second inductive element, a bandwidth of a higher frequency band among the two frequency bands may be changed.

A gap capacitive element connected in series to the other side of the radiator may be further included.

The gap capacitive element may include a capacitor to adjust a dual-band resonant frequency, and the first inductive element may include an inductor to fine-tune a dual-band resonant frequency.

The radiator may include: a first radiator including a second inductive element connected in series to one side; and a second radiator including a gap capacitive element connected in series to the other side, wherein the feeding part, the first radiator, and the ground part form a first loop, and the feeding part and the second radiator and the ground unit may be operated in two bands by forming a second loop.

The first radiator may transmit/receive a signal of a first frequency band, and the second radiator may transmit/receive a signal of a second frequency band by extending the first radiator.

A dual-band loop-type ground radiation antenna having broadband characteristics according to another embodiment includes a ground unit; a radiator having both ends connected to the ground; and a feeding structure that is connected to the ground at the middle of the radiator, is electromagnetically coupled to a feeding point, and includes at least one capacitive element and at least one inductive element.

The feeding structure may include: a feeding part connected to the ground at the middle of the radiator and electromagnetically coupled to the feeding point; a ground connection part disposed in parallel with the power feeding part and connected to the ground part at the middle of the radiator; a first inductive element configured in series with the ground connection; a first capacitive element connected in series to the power supply unit; and a second capacitive element connected in series to the ground connection part.

The radiator may include: a first radiator including a second inductive element connected in series to one side; and a second radiator including a gap capacitive element connected in series to the other side, wherein the feeding part, the first radiator, and the ground part form a first loop, and the feeding part and the second radiator and the ground unit may be operated in two bands by forming a second loop.

According to embodiments, by adding a lumped element inductor other than a capacitor configured in a parallel circuit in a power supply structure of a dual-band loop-type ground radiation antenna, a broadband capable of controlling both the radiation efficiency, the operating frequency, and the bandwidth of the low and high frequency bands It is possible to provide a dual-band loop-type ground radiation antenna having a characteristic.

According to embodiments, by controlling not only the low frequency band but also the high frequency band in mobile phones, wireless earphones, GPS terminals, etc., it is possible to provide a dual-band loop-type ground radiation antenna having broadband characteristics that can more effectively control two bands. have.

1 is a diagram illustrating a dual-band loop-type ground radiation antenna having broadband characteristics according to an embodiment.
FIG. 2 is an enlarged view of part A of FIG. 1 according to an exemplary embodiment.
3 is a diagram illustrating a change in return loss according to an inductor L2 according to an exemplary embodiment.
4 is a diagram illustrating a Smith chart change according to an inductor L2 according to an exemplary embodiment.
5 is a diagram illustrating a change in return loss according to an inductor L1 according to an exemplary embodiment.
6 is a diagram illustrating a Smith chart change according to an inductor L1 according to an exemplary embodiment.
7 is a diagram illustrating a change in return loss according to a capacitor Cf according to an exemplary embodiment.
8 is a diagram illustrating a Smith chart change according to a capacitor Cf according to an exemplary embodiment.
9 is a diagram illustrating a change in return loss according to a capacitor Cs according to an exemplary embodiment.
10 is a diagram illustrating a Smith chart change according to a capacitor Cs according to an exemplary embodiment.

Hereinafter, embodiments will be described with reference to the accompanying drawings. However, the described embodiments may be modified in various other forms, and the scope of the present invention is not limited by the embodiments described below. In addition, various embodiments are provided in order to more completely explain the present invention to those of ordinary skill in the art. The shapes and sizes of elements in the drawings may be exaggerated for clearer description.

1 is a diagram illustrating a dual-band loop-type ground radiation antenna having broadband characteristics according to an embodiment.

As shown in FIG. 1, the following embodiments relate to a dual-band loop-type ground radiation antenna having broadband characteristics, and in the power supply structure of the dual-band loop-type ground radiation antenna, a condensed element inductor other than a capacitor configured in a parallel circuit is added By doing so, it is possible to control both the radiation efficiency, operating frequency, and bandwidth of the low and high frequency bands.

Mobile terminals to which dual-band radiation antennas are applied have been used in various fields so far, and a technology capable of creating two bands with one terminal and controlling both bands at the same time is still being developed. However, a simple model that can effectively control the two bands has not been presented.

According to embodiments, it is possible to control not only a low frequency band but also a high frequency band in a mobile phone, a wireless earphone, a GPS terminal, etc., so that the two bands can be used more effectively. Accordingly, it is possible to efficiently implement a dual-band loop-type ground radiation antenna in the field of mobile antennas through the embodiments.

FIG. 2 is an enlarged view of part A of FIG. 1 according to an exemplary embodiment.

Referring to FIG. 2 , a dual-band loop-type ground radiation antenna having broadband characteristics according to an embodiment includes a grounding unit 110 , a clearance unit, a feeding unit 120 , a grounding connection unit 130 , a radiator 140 and a second One inductive element 131 may be included. According to the embodiment, a dual-band loop-type ground radiation antenna having broadband characteristics includes a first capacitive element 122 , a second capacitive element 132 , a second inductive element 141 , and a gap capacitive element. (142) may be further included.

First, the substrate is a body portion to which components of a dual-band loop-type ground radiation antenna having broadband characteristics are coupled, and may be formed of a Print Circuit Board (PCB) or the like. The substrate may be made of a dielectric material, and the dielectric constant of the substrate may be determined by a required radiation characteristic. For example, an FR4 substrate (εr = 4.4, tan δ = 0.02) may be used, and the size of the substrate may be 30 mm×40 mm×1 mm.

A ground portion (ground) 110 may be formed in a predetermined region above the substrate. The grounding unit 110 may provide a grounding voltage to electrical/electronic elements of a communication device in which an antenna is embedded. The grounding unit 110 is made of a conductive metal material and may be electrically coupled to a feeding circuit.

The clearance part is configured in at least a part of the grounding part 110 , and may be formed by removing a part of the grounding part 110 . Here, the clearance part may be formed in a rectangular shape. However, the present invention is not limited thereto, and the clearance portion may be formed in a polygonal, circular or oval shape.

The feeding unit 120 is made of a conductive metal material having a predetermined width and is electromagnetically coupled to the feeding point 121 to receive a power feeding signal. For example, the power feeding unit 120 may be coupled with the inner conductor of the coaxial line to receive a power feeding signal. Here, the power supply unit 120 may be configured to be connected to the ground unit 110 at the middle of the radiator 140 .

The first capacitive element 122 may be connected in series to the power supply unit 120 . That is, the first capacitive element 122 may be formed such that the power supply unit 120 and the radiator 140 are spaced apart from each other by a predetermined distance. The first capacitive element 122 may be formed of a capacitor to control input impedance.

The ground connection unit 130 is made of a conductive metal material having a predetermined width, is spaced apart from the power supply unit 120 by a predetermined distance, and is disposed in parallel, and may be configured to be connected to the ground unit 110 at the middle of the radiator 140 .

The second capacitive element 132 may be connected in series to the ground connection unit 130 . That is, the second capacitive element 132 may be formed such that the power supply unit 120 and the radiator 140 are spaced apart from each other by a predetermined distance. The second capacitive element 132 may be formed of a capacitor to control input impedance.

The input impedance from the feeding point 121 may be adjusted by forming a feeding structure by the first capacitive element 122 and the second capacitive element 132 , and the feeding structure forms another resonance band through a loop. can make it possible

In addition, the first inductive element 131 may be connected in series to the ground connection unit 130 . That is, the second capacitive element 132 and the first inductive element 131 described above may be connected in series to the ground connection unit 130 . The first inductive element 131 may be formed of an inductor to adjust the resonant frequency of the dual band. In addition, the first inductive element 131 can also adjust the input impedance.

When the first inductive element 131 is additionally connected to the ground connection part 130 , the impedance characteristic of the loop-type current generated from the feeding point 121 may be changed. That is, the first inductive element 131 is changed to a resonator having a ratio of a relatively large inductance to a relatively small capacitance at a corresponding frequency. Impedance can be efficiently adjusted by using the first inductive element 131 , thereby realizing a broadband with a short physical length of the ground connection unit 130 .

As described above, in the embodiments, the power supply unit 120 and the ground connection unit 130 include the first capacitive element 122 and the first capacitive element 122 and the second capacitive element 132 and the first connected in parallel. A power feeding structure may be formed by the inductive element 131 . In this case, the input impedance may be adjusted by the first capacitive element 122 , the second capacitive element 132 , and the first inductive element 131 .

And by adjusting the element value of the first capacitive element 122, the performance of a relatively high frequency band among the two frequency bands is adjusted, and the element value of the second capacitive element 132 is adjusted by adjusting the element value of the two frequency bands. It is possible to adjust the performance and operating frequency of a relatively low frequency band.

The radiator 140 may be formed of the same conductive metal material as the ground unit 110 , and in this case, the radiator 140 may be configured to have a predetermined width. Both ends of the radiator 140 may be configured to be connected to the ground unit 110 .

A second inductive element 141 may be connected in series to one side of the radiator 140 . The second inductive element 141 may be formed of an inductor to adjust the resonant frequency of the dual band. In addition, by adjusting the element values of the first inductive element 131 and the second inductive element 141 , a bandwidth of a relatively high frequency band among the two frequency bands may be changed.

Also, a gap capacitive element 142 may be connected in series to the other side of the radiator 140 . The gap capacitive element 142 may be formed of a capacitor to adjust the resonant frequency of the dual band. As described above, the resonant frequency of the dual band may be adjusted by the first inductive element 131 and the gap capacitive element 142 . At this time, after adjusting the resonant frequency of the dual band by the gap capacitive element 142 , it is also possible to finely adjust the resonance frequency of the dual band by using the first inductive element 131 . Due to the first inductive element 131 , the gap capacitive element 142 may have a relatively small size.

Here, the radiator 140 includes a first radiator 140 including a second inductive element 141 connected in series on one side, and a first radiator 140 including a gap capacitive element 142 connected in series on the other side. The two radiators 140 can be divided and expressed. The feeding unit 120 , the first radiator 140 , and the grounding unit 110 form a first loop, and the feeding unit 120 , the second radiator 140 and the grounding unit 110 form a second loop. Therefore, it can be operated in two bands. In this case, the first radiator 140 may transmit and receive signals in the first frequency band, and the second radiator 140 may transmit and receive signals in the second frequency band by extending the first radiator 140 .

A dual-band loop-type ground radiation antenna having broadband characteristics according to another embodiment includes a grounding part 110, a radiator 140 having both ends connected to the grounding part 110, and a grounding part ( 110), is electromagnetically coupled to the feeding point 121, and may include a feeding structure in which at least one or more capacitive elements and at least one or more inductive elements are configured.

Here, the feeding structure is connected to the grounding unit 110 at the middle of the radiator 140 , the feeding unit 120 electromagnetically coupled to the feeding point 121 , and disposed in parallel with the feeding unit 120 , the radiator At the stop of 140, the ground connection unit 130 connected to the ground unit 110, the first inductive element 131 configured in series with the ground connection unit 130, and the first connected to the power supply unit 120 in series It may include a first capacitive element 122 and a second capacitive element 132 connected in series to the ground connection unit 130 .

The radiator 140 includes a first radiator 140 including a second inductive element 141 connected in series on one side, and a second radiator 140 including a gap capacitive element 142 connected in series on the other side. 140 , and the power feeding unit 120 , the first radiator 140 and the grounding unit 110 form a first loop, and the feeding unit 120 , the second radiator 140 and the grounding unit 110 . ) can be operated in two bands by forming a second loop.

The dual-band loop-type ground radiation antenna having a broadband characteristic according to another embodiment overlaps the configuration of the dual-band loop-type ground radiation antenna having a broadband characteristic according to the above-described embodiment, and thus a detailed description thereof will be omitted.

According to embodiments, by adding a lumped element inductor other than a capacitor configured in a parallel circuit in the power supply structure of the dual-band loop-type ground radiation antenna, both the radiation efficiency, the operating frequency, and the bandwidth of the low and high frequency bands can be controlled.

This is achieved by inserting an additional lumped element inductor rather than controlling the resonance of the high frequency band through the capacitor of the power supply loop, the capacitor of the parallel circuit, and the gap capacitance formed at the end of the radiator 140 (Radiator). resonance can be controlled more precisely. Radiation efficiency, operating frequency, bandwidth, etc. can be controlled by changing the values of the capacitor of the power supply loop, the capacitor of the parallel circuit, and the additionally inserted inductor.

Hereinafter, an example of a dual-band loop-type ground radiation antenna having a broadband characteristic will be described.

For example, a ground (ground portion, 110) of a size of 30 x 40 mm is placed on FR4 having a height of 1 mm. The clearance space designed above the ground 110 is 5 mm x 3.8 mm, and the antenna existing in the center of the ground 110 uses a basic dual-band loop-type ground radiation antenna. The dual-band loop-type ground radiation antenna includes a first capacitive element 122 Cf and a second capacitive element 132 Cs for adjusting the impedance of the feeding structure, and a second inductive element for adjusting the resonant frequency of the dual band ( 141) L1 and gap capacitance 142 are present in the radiator 140, and the first inductive element 131 L2, which is a lumped element inductor, is additionally inserted. Here, 0.1nH for L1, 20nH for L2, 0.03pF for Cs, and 0.5pF for Cf were applied for each device value.

The loop type current mode emits radiation by generating magnetic coupling with the ground characteristic mode, and is positioned in the middle of the ground 110 to maximize radiation performance. It is designed to operate in two bands, 2.5 GHz and 5 GHz.

3 is a diagram illustrating a change in return loss according to an inductor L2 according to an exemplary embodiment. And FIG. 4 is a view showing a Smith chart change according to the inductor L2 according to an embodiment.

3 and 4, the return loss and Smith charts according to the change in the value of the additionally inserted inductor L2 are shown. 16nH, 18nH, 20nH, and 22nH were sequentially applied to the device values of the L2, and it can be seen that the higher the L2 value, the higher the bandwidth of the high frequency band increases from 3.75GHz to 7.01GHz to 3.27GHz to 7.04GHz.

5 is a diagram illustrating a change in return loss according to an inductor L1 according to an exemplary embodiment. And FIG. 6 is a view showing changes in the Smith chart according to the inductor L1 according to an embodiment.

5 and 6, the return loss and Smith charts according to the change in the element value of the inductor L1 are shown. 0.1nH, 0.2nH, 0.3nH, 0.4nH, and 0.5nH were applied sequentially for the device values of the corresponding inductor. that can be checked

7 is a diagram illustrating a change in return loss according to a capacitor Cf according to an exemplary embodiment. And FIG. 8 is a view showing a change in the Smith chart according to the capacitor Cf according to an exemplary embodiment.

7 and 8, the return loss and Smith charts according to the change in the device value of the capacitor Cf are shown. The device values of the corresponding capacitors were applied in order of 0.42pF, 0.44pF, 0.46pF, 0.48pF, and 0.50pF, and it can be seen that the return loss in the high frequency band rises from -11dB to -13dB by changing the device value.

9 is a diagram illustrating a change in return loss according to a capacitor Cs according to an exemplary embodiment. And FIG. 10 is a view showing a change in the Smith chart according to the capacitor Cs according to an embodiment.

Referring to FIGS. 9 and 10 , return loss and Smith charts according to changes in the device value of the capacitor Cs are shown. The device values of the corresponding capacitors were applied in order of 0.7pF, 0.5pF, and 0.3pF, and the resonance and operating frequency of the low frequency band can be adjusted by changing the device value.

In this way, the embodiments can change the bandwidth of the high frequency band by adjusting the values of L1 and L2, and adjust the values of Cf and Cs to adjust the performance of the high frequency band, the performance of the low frequency band, and the operating frequency. can

The dual-band loop-type ground radiation antenna having broadband characteristics according to the embodiments may be applied to a portable terminal equipped with an antenna for wireless communication such as Wi-Fi, Bluetooth, and Wi-Fi 6. Dual-band loop-type ground radiation antenna technology with broadband characteristics according to the embodiments can be applied on the PCB of a terminal using wireless communication, a terminal using two or more antennas, a terminal using Wi-Fi 6, etc. have.

There are various types of mobile terminals using wireless communication and their penetration rate is also very high. In addition to commonly used smartphones, the fields of application of antennas for portable terminals such as wireless earphones, smart remote controls, and LTE routers are wide.

In the above, when it is mentioned that a component is "connected" or "connected" to another component, it may be directly connected or connected to the other component, but other components may exist in the middle. It should be understood that there is On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The terminology used herein is used only to describe specific embodiments, and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

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

In addition, terms such as “…unit”, “…module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software.

In addition, the components of the embodiment described with reference to each drawing are not limitedly applied only to the embodiment, and may be implemented to be included in other embodiments within the scope of maintaining the technical spirit of the present invention, and also Even if the description is omitted, it is natural that a plurality of embodiments may be re-implemented as one integrated embodiment.

In addition, in the description with reference to the accompanying drawings, the same components regardless of the reference numerals are given the same or related reference numerals, and the overlapping description thereof will be omitted. In describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

As described above, although the embodiments have been described with reference to the limited embodiments and drawings, various modifications and variations are possible from the above description by those skilled in the art. For example, the described techniques are performed in an order different from the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

110: ground
120: feeding unit
121: feeding point
122: first capacitive element
130: ground connection
131: first inductive element
132: second capacitive element
140: emitter
141: second inductive element
142: gap (Gap) capacitive element

Claims (15)

In the dual-band loop-type ground radiation antenna having broadband characteristics,
a ground portion formed on the substrate;
a clearance part configured in at least a part of the ground part;
a radiator configured to the side of the clearance unit and both ends connected to the ground unit;
a feeding part connected to the grounding part from the middle of the radiator and electromagnetically coupled to a feeding point;
a ground connection part disposed in parallel with the feeding part and connected to the ground part at the middle of the radiator; and
a first inductive element configured in series with the ground connection
including,
a first capacitive element connected in series to the power supply unit; and
a second capacitive element connected in series to the ground connection part
further comprising,
A feeding structure is formed by the first capacitive element and the second capacitive element and the first inductive element connected in parallel to the first capacitive element and the first capacitive element in the feeding part and the ground connection part
Characterized in, a dual-band loop-type ground radiation antenna. delete delete According to claim 1,
The first capacitive element and the second capacitive element are
A capacitor that controls the input impedance
Characterized in, a dual-band loop-type ground radiation antenna. According to claim 1,
adjusting the element value of the first capacitive element to adjust the performance of a higher frequency band among two frequency bands,
Adjusting the performance and operating frequency of a lower frequency band among two frequency bands by adjusting the element value of the second capacitive element
Characterized in, a dual-band loop-type ground radiation antenna. According to claim 1,
A second inductive element connected in series to one side of the radiator
Further comprising a, dual-band loop-type ground radiation antenna. 7. The method of claim 6,
The second inductive element,
Controlling the resonant frequency of a dual band composed of an inductor
Dual-band loop-type ground radiation antenna, characterized in that. 7. The method of claim 6,
Changing the bandwidth of a higher frequency band among two frequency bands by adjusting element values of the first inductive element and the second inductive element
Dual-band loop-type ground radiation antenna, characterized in that. According to claim 1,
Gap capacitive element connected in series to the other side of the radiator
Further comprising a, dual-band loop-type ground radiation antenna. In the dual-band loop-type ground radiation antenna having broadband characteristics,
a ground portion formed on the substrate;
a clearance part configured in at least a part of the ground part;
a radiator configured to the side of the clearance unit and both ends connected to the ground unit;
a feeding part connected to the grounding part from the middle of the radiator and electromagnetically coupled to a feeding point;
a ground connection part disposed in parallel with the feeding part and connected to the ground part at the middle of the radiator; and
a first inductive element configured in series with the ground connection
including,
Gap capacitive element connected in series to the other side of the radiator
further comprising,
The gap (Gap) capacitive element,
Consists of a capacitor to control the resonant frequency of the dual band,
The first inductive element,
Fine control of the resonant frequency of the dual band composed of an inductor
Characterized in, a dual-band loop-type ground radiation antenna. According to claim 1,
The radiator is
a first radiator including a second inductive element connected in series to one side; and
A second radiator including a gap capacitive element connected in series to the other side
including,
The feeding unit, the first radiator, and the grounding unit form a first loop, and the feeding unit, the second radiator, and the grounding unit forming a second loop, and are operated in two bands.
Characterized in, a dual-band loop-type ground radiation antenna. 12. The method of claim 11,
The first radiator transmits and receives a signal of a first frequency band,
In the second radiator, the first radiator is formed to extend and transmit/receive signals in a second frequency band.
Characterized in, a dual-band loop-type ground radiation antenna. In the dual-band loop-type ground radiation antenna having broadband characteristics,
ground;
a radiator having both ends connected to the ground; and
A feeding structure in which at least one capacitive element and at least one inductive element are connected to the ground at the stop of the radiator and electromagnetically coupled to a feeding point
including,
The feeding structure is
a feeding part connected to the grounding part at the middle of the radiator and electromagnetically coupled to the feeding point;
a ground connection part disposed in parallel with the feeding part and connected to the ground part at the middle of the radiator;
a first inductive element configured in series with the ground connection;
a first capacitive element connected in series to the power supply unit; and
a second capacitive element connected in series to the ground connection part
Including, a dual-band loop-type ground radiation antenna. delete 14. The method of claim 13,
The radiator is
a first radiator including a second inductive element connected in series to one side; and
A second radiator including a gap capacitive element connected in series to the other side
including,
The feeding unit, the first radiator, and the grounding unit form a first loop, and the feeding unit, the second radiator, and the grounding unit forming a second loop, and are operated in two bands.
Characterized in, a dual-band loop-type ground radiation antenna.

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