KR100741779B1 - Broadband antenna and electronic equipment comprising it - Google Patents

Abstract

The present invention relates to a wideband antenna and an electronic apparatus having the wideband antenna, comprising: a ground plane formed in a finite plane; An antenna body of a conductor installed on the ground plane; A feed line for electrically interconnecting the antenna body and the ground plane; A ground pin for grounding the antenna body to a ground plane; At least one slot is formed in the antenna body and at least one slit connected from the slot to one end of the antenna body to be open, thereby miniaturization and can be embedded in the electronic device It is easy to manufacture, the bandwidth of the frequency is greatly improved, and the generation of multiple resonances is possible, and by having a monopole antenna body, it is suitable for low frequency band and has a monopole slit open to the monopole antenna body, thereby providing a low frequency bandwidth. It is possible to improve the reflection loss and reduce the reflection loss, and by providing a stub, it is possible to provide a wideband antenna that is easy to tune the frequency band as needed.

Broadband Antenna, Flat Panel Antenna, Single Polar Antenna, Stubs

Description

BROADBAND ANTENNA AND ELECTRONIC EQUIPMENT COMPRISING IT}

1 is a perspective view showing the configuration of a broadband antenna according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of A of FIG. 1; FIG.

3 is a plan view showing an unfolded state of FIG.

4 is a graph showing the return loss of the broadband antenna in the case of FIG.

FIG. 5 is a plan view illustrating a state in which the first to fourth slots are removed by expanding A of FIG. 1; FIG.

6 is a graph showing the return loss of the broadband antenna in the case of FIG.

FIG. 7 is a plan view illustrating a state in which a third body is added to the first body as the A of FIG. 1 is unfolded; FIG.

8 is a graph showing the return loss of the broadband antenna in the case of FIG.

FIG. 9 is a plan view illustrating a state in which the thickness of the first body is increased by unfolding A of FIG. 1; FIG.

FIG. 10 is a graph showing the return loss of the broadband antenna in the case of FIG.

FIG. 11 is a plan view illustrating a state in which a stub is removed as A in FIG. 1 is unfolded; FIG.

12 is a graph showing the return loss of the broadband antenna in the case of FIG.

13 is a plan view of a numerical value according to the manufacturing example of A of FIG. 1;

14, 15, and 16 illustrate a configuration of an electronic device having a broadband antenna according to another embodiment of the present invention.

   14 is a perspective view of a mobile terminal.

   15 is a perspective view of a notebook.

   16 is a perspective view of an MP3 player.

17 is an enlarged fragmentary sectional view taken along the line AA ′ of FIGS. 14, 15, and 16.

Explanation of symbols on the main parts of the drawings

100: broadband antenna 110: ground plane

120: antenna body 121: first slot

122: second slot 123: third slot

124: fourth slot 125: fifth slot

126: first slit 127: second slit

130: power supply line 140: ground pin

150: monopole antenna body 151: first body

152: second body 153: unipolar slit

154: third body 160: stub

200: mobile terminal 300: laptop

400: MP3 Player

The present specification relates to a wideband antenna and an electronic device having the wideband antenna.

Communication with mobile terminals such as mobile phones, PDAs, car navigation systems, and portable computers such as laptops, electronic organizers, electronic dictionaries, or music players such as MP3 players, MD players, radio, audio, etc. An electronic device with built-in means performs a function of receiving and reproducing radio waves through the electronic device, or transmitting information generated from the electronic device in the form of radio waves.

However, the superiority of the function of such an electronic device is of course important, and the importance of the design of the electronic device to meet the aesthetic needs of consumers is also highlighted.

In particular, the recent trend is that in order to meet the aesthetic needs of consumers who require a slim design, it is possible to reduce the size of the electronic device by embedding an antenna, which has been protruded outwardly of the electronic device, inside the electronic device. In addition, they try to beautify their external aesthetics.

In-tenna, such as the built-in antenna, is not only highly efficient to be suitable for the structure of a small electronic device, but is also a very important issue of how to reduce its size.

The rectangular planar inverted antenna (PIFA) with half the path of radiated current can be embedded inside the electronics, so it can be designed to meet the taste of consumers who want a sophisticated design. have. In addition, since the antenna is protected inside the case of the electronic device, it has the advantage of being safe from external shocks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a broadband antenna capable of miniaturization, embedded in an electronic device, and capable of generating multiple resonances in a wide frequency band and an electronic device having the broadband antenna. In particular, the present invention provides a broadband antenna capable of greatly improving the bandwidth of the narrowband, which has been pointed out as a disadvantage of the conventional built-in antenna, greatly improving the bandwidth while maintaining miniaturization, and providing an electronic device having the broadband antenna. For that purpose.

In order to achieve the object as described above, the present invention comprises a ground plane formed in a finite plane; An antenna body of a conductor installed on the ground plane; A feed line for electrically interconnecting the antenna body and the ground plane; A ground pin for grounding the antenna body to a ground plane; It is configured to include, the antenna body provides a wideband antenna having at least one slot and at least one slit is connected to open from the slot to one end of the antenna body.

This provides the function of a flat type inverted F antenna by providing a feed line and a ground pin, and at the same time improves the frequency bandwidth by forming at least one slit in the antenna body, and at least one slot in the antenna body to form multiple resonances. This is to enable the generation of.

Here, an insulating dielectric may be inserted between the antenna body and the ground plane, which reduces the distance between the antenna body and the ground plane by inserting a dielectric between the antenna body and the ground plane with a dielectric constant greater than that of air. This is to further reduce the size of the broadband antenna.

In addition, the at least one slit may include an open slit connected between the feed line and the ground pin, which is a ground plane through the ground pin after the current supplied through the feed line circulates through the antenna body. This is to facilitate the formation of a circuit transmission line entering the circuit and to improve its characteristics.

On the other hand, the present invention is a ground plane formed in a finite plane; An antenna body of a conductor installed on the ground plane; A feed line for electrically interconnecting the antenna body and the ground plane; A ground pin for grounding the antenna body to a ground plane; The antenna body includes a first slot, a second slot, a third slot, and a fourth slot which are formed to be spaced apart from each other in parallel, and a fifth slot which interconnects the second slot to the fourth slot, An end portion of the first slot and the second slot provides a wideband antenna having first and second slits respectively connected to and opened up to one end of the antenna body.

This is to form a plurality of slots and a plurality of slits in the antenna body to have a specific pattern, so that multiple resonant frequencies are generated and the frequency bandwidth can be greatly improved.

In particular, when slots and slits are formed in the specific pattern as described above, radio waves in the 3G mobile communication (3G) band can be cleanly received.

In this case, the first slit and the second slit may be formed at opposite ends as one end of the antenna body, which is a circuit transmission formed in the antenna body of the broadband antenna that functions as a flat inverted antenna. This is to improve the characteristics of the line.

In addition, the second slit may be connected to the feed line and the ground pin to be open, which is a circuit transmission line through which the current supplied through the feed line circulates through the antenna body and enters the ground plane through the ground pin. This is to facilitate the formation of and to improve the characteristics thereof.

On the other hand, the present invention is a ground plane formed in a finite plane; A flat antenna body of a conductor installed on the ground plane; A feed line for electrically interconnecting the planar antenna body and the ground plane; A grounding pin for grounding the flat antenna body to a ground plane; A unipolar antenna body electrically connected with the flat antenna body; It provides a broadband antenna configured to include.

It is intended to simultaneously obtain the advantages of a monopole antenna suitable for a low frequency band by providing a monopole antenna body while maintaining the advantages of a flat type inverted antenna suitable for a high frequency band by providing a feed line and a ground pin.

Here, the unipolar antenna body is configured to include a first body installed in parallel to the flat antenna body, and a second body interconnecting the end of the first body and the end of the flat antenna body, A third slit may be formed between the type antenna body and the first body, so that an open third slit is formed between the monopole antenna body and the flat antenna body to improve the bandwidth of the low frequency band. . And, to improve the characteristics of the circuit transmission line by interconnecting the end of the first body and the end of the flat antenna body.

The monopole antenna body may be formed to be bent at a right angle from the planar antenna body, which may reduce the size of the entire broadband antenna, thereby miniaturizing the broadband antenna, and the monopole antenna body and the flat antenna body. This is to facilitate frequency tuning by allowing coupling between ground planes.

On the other hand, the present invention is a ground plane formed in a finite plane; An antenna body of a conductor installed on the ground plane; A feed line for electrically interconnecting the antenna body and the ground plane; A stub protruding from an approximately middle portion of the feed line; A ground pin for grounding the antenna body to a ground plane; It provides a broadband antenna configured to include.

This is to provide a stub in the broadband antenna that performs the function of a flat type inverted antenna, so as to facilitate frequency tuning of the broadband antenna by adjusting the length of the stub as necessary.

On the other hand, the present invention is a ground plane formed in a finite plane; A flat antenna body of a conductor installed on the ground plane; A feed line for electrically interconnecting the planar antenna body and the ground plane; A stub protruding from approximately an intermediate portion of the feed line; A grounding pin for grounding the flat antenna body to a ground plane; A unipolar antenna body electrically connected with the flat antenna body; It is configured to include, the planar antenna body provides a wideband antenna having at least one slot, and at least one slit is connected to open from the slot to one end of the flat antenna body.

As described above, it takes advantage of a flat type inverted antenna suitable for a high frequency band by providing a feed line and a ground pin, and takes advantage of a monopole antenna suitable for a low frequency band by providing a monopole antenna body, and at least one. In order to improve the frequency bandwidth by providing a slit of, to allow the generation of multiple resonances by having at least one slot, and to provide a stub so that the frequency band of the broadband antenna can be tuned as necessary.

Here, the slot is configured to include a first slot, a second slot, a third slot and a fourth slot formed in parallel to each other and a fifth slot to interconnect the second slot to the fourth slot, The slit may include a first slit and a second slit which are connected and open from the first slot and the second slot to one end of the antenna body, respectively.

This is because, as described above, by forming a plurality of slots and a plurality of slits in a specific pattern, it is possible to generate multiple resonant frequencies as needed and to improve the frequency bandwidth, particularly to be suitable for the third generation mobile communication frequency band .

On the other hand, the present invention provides an electronic device having a wideband antenna, which is configured to include the wideband antenna and which transmits and receives radio waves through the wideband antenna.

The electronic device may be a portable terminal such as a mobile phone, a PDA, a car navigation system, a portable computer such as a laptop, an electronic notebook, an electronic dictionary, or a music player such as an MP3 player, an MD player, a radio, an audio, or the like. Likewise, electronic devices incorporating communication means are generically referred to.

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

However, in the following description of the present invention, a description of a known function or configuration will be omitted to clarify the gist of the present invention.

1 is a perspective view showing the configuration of a broadband antenna according to an embodiment of the present invention, FIG. 2 is a perspective view showing an enlarged view of A of FIG. 1, and FIG. 3 shows an unfolded state of FIG. FIG. 4 is a plan view illustrating a return loss of the broadband antenna in FIG. 3, FIG. 5 is a plan view illustrating the first to fourth slots of FIG. 5 is a graph illustrating the reflection loss of the broadband antenna, FIG. 7 is a plan view illustrating a state in which a third body is added to the first body as shown in FIG. 1A, and FIG. 8 is a view of FIG. In this case, it is a graph showing the reflection loss of the broadband antenna, FIG. 9 is a plan view showing the state in which the thickness of the first body is increased by spreading A of FIG. 1, and FIG. 10 is the reflection loss of the broadband antenna in FIG. Is a graph of FIG. 11 FIG. 1 is a plan view illustrating a state in which a stub is removed and FIG. 12 is a graph illustrating the reflection loss of the broadband antenna in FIG. 11, and FIG. 13 is a numerical value according to the manufacturing example of A of FIG. 1. It is a top view which described and described.

1 to 3, the broadband antenna 100 according to an embodiment of the present invention, the ground plane 110, the antenna body 120 provided on the ground plane 110, and the ground A power supply line 130 electrically connecting the surface 110 and the antenna body 120, a ground pin 140 to ground the antenna body 120 to the ground plane 110, an antenna body 120, The monopole antenna body 150 is electrically connected, and the stub 160 protrudes from an approximately middle portion of the feed line 130.

Here, the ground plane 110 has a finite plane and consists of a conductor capable of passing current. The ground plane 110 supplies a current to the antenna body 120 through a power supply line 130, which will be described later, and receives a current from the antenna body 120 through the ground pin 140 to thereby antenna body 120 Allow a circuit transmission line to be generated. The ground plane 110 preferably has an area larger than that of the antenna body 120, which will be described later. The ground plane 110 may be configured to be electrically connected to a circuit board of an electronic device. 110 may be configured as the circuit board itself.

The antenna body 120 is installed in parallel with the ground plane 110 on the ground plane 110, and consists of a conductor to radiate or receive radio waves.

Although the antenna body 120 is illustrated in a rectangular plate shape in FIGS. 1 to 3, the shape of the antenna body 120 is not limited thereto, and the antenna body 120 may be formed of a conductor and may radiate or receive radio waves. However, the length ① of the antenna body 120 is preferably designed in consideration of the fact that a resonant frequency corresponding to a quarter wavelength of radio waves is generated by the length.

As shown in FIGS. 1 to 3, at least one slit and slot is formed in the antenna body 120 in a specific pattern.

Here, at least one slot generates multiple resonant frequencies in the wideband antenna 100. In particular, as shown in detail in FIG. 3, the first slot 121, the second slot 122, the third slot 123 and the fourth slot 124 and the second slot 122 formed in parallel with each other. When the fifth slot 125 is formed to interconnect the intermediate part of the fourth to fourth slots 124 to be interconnected, a quadrature resonance frequency is generated in the high frequency band.

This can be confirmed through FIG. 4. As shown in FIG. 4, in the high frequency band, resonant frequencies of four frequencies of approximately 2.45 GHz (H1), 3 GHz (H2), 3.25 GHz (H3), and 4 GHz (H4) are shown. Is generated.

In addition, the frequency characteristic is changed by factors such as the number, size, length, position, and width of the slots 121 to 124. 5 and 6 to confirm this is as follows.

5 and 6, when the first slot 121 to the fourth slot 124, which are multiple slots formed in parallel to each other in the antenna body 120, are removed, a multiple (quadruple) resonance is performed in a high frequency band. This occurrence can be confirmed, but the return loss (RL) at each resonant frequency (H1 to H4) is different, the frequency bandwidth (BWH) is changed based on the return loss -6dB. The results are shown in the table below.

Before removing multiple slots After removing multiple slots   Resonant frequency   High Frequency Primary Resonance (H1): 2.45 High Frequency Secondary Resonance (H2): 3 High Frequency Third Resonance (H3): 3.25 High Frequency Fourth Resonance (H4): 4   High Frequency Primary Resonance (H1): 2.45 High Frequency Secondary Resonance (H2): 3 High Frequency Third Resonance (H3): 3.6 High Frequency Fourth Resonance (H4): 4.7   Return loss   H1 return loss: -13.5 dB H2 return loss: -24 dB H3 return loss: -22 dB H4 return loss: -15.5 dB   H1 return loss: -18 dB H2 return loss: -16 dB H3 return loss: -11 dB H4 return loss: -10 dB   Bandwidth at -6 dB    2.2 to 4.1 GHz (Width: 1.9 GHz)   2.2 to 3.25 GHz (Width: 1.05 GHz) 3.55 to 3.8 GHz (Width: 0.25 GHz) 4.5 to 4.8 GHz (Width: 0.3 GHz)

As compared to the above table, removing the slots 121 to 124 not only narrows the bandwidth (B.W.H) but also generates discontinuous frequency bands (3.25 to 3.55 GHz, 3.8 to 4.5 GHz). In addition, the return loss (RL) at the remaining resonance frequencies H2 to H4 except for the high frequency primary resonance frequency H1 is increased.

That is, since the characteristics of the frequency such as the multiple resonant frequency, the return loss, and the bandwidth vary depending on the number, size, length, width, position, etc. of the slots 121 to 124, the number, size, length, width, By adjusting the position, the antenna can be selected as required.

Meanwhile, the frequency bandwidth of the antenna may be improved by one or more slits 126 and 127 that are connected and open up to one end of the antenna body 120.

The presence of slits 126 and 127 generally increases the length of the short-circuit transmission circuit generated by feed line 130 and ground pin 140, thus affecting the impedance of the antenna and affecting the frequency band of the antenna. Affect. In particular, as shown in detail in FIG. 3, the first slit 126 and the first opening 121 connected to the one end of the antenna body 120 from the end of the first slot 121 and the second slot 122 are opened. When the two slits 127 are formed, the frequency bandwidth BWH becomes wider. As shown in Fig. 4, the frequency bandwidth (BWH) of the high frequency band is approximately 2.2 GHz to 4.1 GHz based on the return loss of -6 dB, which means that the bandwidth of the conventional general planar inverted F antenna is 6 dB. Considering that it was only 1.9GHz to 2.1GHz, it can be seen that it is a significant improvement.

In particular, the major frequency band of 3G mobile communication (3G), which has recently become a major social issue, is around 2 GHz, and when watching satellite DMB broadcasting using a mobile terminal, the band is L-band (1 to 2 GHz) or Considering the S-band (2 to 4 GHz), when using the broadband antenna 100 according to an embodiment of the present invention it is possible to transmit and receive clean radio waves in the bandwidth.

In addition, the first slit 126 and the second slit 127 are end portions of one side of the antenna body 120, and are connected to each other to face opposite sides, and such a shape is formed in the broadband antenna 100. Although it is preferable to improve the characteristics of the circuit transmission line, the scope of the present invention is not limited to such a shape.

In particular, the second slit 127 is connected to open between the power supply line 130 and the ground pin 140, which is supplied with current through the power supply line 130 to circulate the antenna body 120 In addition, the current is allowed to enter the ground plane 110 through the ground pin 140 to facilitate the formation of a circuit transmission line.

As such, factors such as the number, position, length, and width of the slit 126 and 127 affect the impedance and the frequency band, and thus the slit 126 and 127 according to the resistance impedance and the frequency band required at the time of antenna design. The number, position, length, width, etc. can be adjusted appropriately.

On the other hand, the presence of the feed line 130 and the ground pin 140 is one of the characteristics of the flat inverted F antenna, the current supplied to the feed line 130 circulates the antenna body 120 and the ground pin 140 By entering the ground plane 110 through, one circuit transmission line is formed. By the formation of such a circuit transmission line, it is possible to transmit and receive radio waves through the antenna body 120. In addition, impedance matching may be facilitated by appropriately adjusting the width and length of the feed line 130 and the ground pin 140.

In addition, the feed line 130 and the ground pin 140 are connected to one end of the antenna body 120. Such a shape serves to facilitate the formation of a circuit transmission line, but the scope of the present invention is not limited to the above shape.

Meanwhile, the broadband antenna according to the exemplary embodiment of the present invention may further include a monopole antenna body 150 that is electrically connected to the antenna body 120. The monopole antenna body 150 is an antenna suitable for transmitting and receiving radio waves in a low frequency band such as terrestrial and airwaves, and is further provided in the wideband antenna 100 according to an embodiment of the present invention, thereby providing It allows the antenna to transmit and receive the low frequency band cleanly. This can be confirmed through FIGS. 4, 6, and 8, and it can be seen that the low frequency resonance frequency L1 occurs around 1.3 GHz due to the monopole antenna body 150.

By providing such a monopole antenna body 150, the wideband antenna 100 can take advantage of both the advantages of the unipolar antenna suitable for the low frequency band, and the advantages of the flat inverted F antenna suitable for the high frequency band.

In this case, the unipolar antenna body 150 is connected to one end of the antenna body 120, and in particular, it is preferable to be connected to the other surface of the side end connected to the power supply line 130 and the ground pin 140. This is because the current supplied through the power supply line 130 circulates through the antenna body 120 and the unipolar antenna body 150 and enters the ground plane 110 through the ground pin 140. This is to improve the characteristics and to facilitate the formation of circuit transmission lines.

The unipolar antenna body 150, the first body 151 is installed in parallel with the antenna body 120, the second end of the first body 151 and the end of the antenna body 120 interconnected to each other Body 152. Since the first body 151 is spaced apart from the antenna body 120 and connected by the second body 152, a monopole slit 153 is formed between the first body 151 and the antenna body 120. .

As such, the open unipolar slit 153 functions to improve the bandwidth B.W.L of the low frequency band. That is, as shown in FIG. 4, the low frequency bandwidth (B.W.L) becomes approximately 1.2 to 1.4 GHz based on the return loss of -6 dB.

In FIG. 7, the third body 154 is installed at the end of the first body 151 of the unipolar antenna body 150 to be spaced apart from the first body 151 and installed in parallel with the first body 151. Is shown. The third body 154 increases the length of the unipolar antenna body 150, and frequency characteristics between the first body 151, the third body 154, and the antenna body 120 which are parallel to each other. Will affect. The results are shown in the table below.

Before installing the third body After installing third body  Low frequency resonant frequency   L1: 1.3 GHz   L1: 1 GHz  Low Frequency Return Loss   RL (L1): -17.5 dB   RL (L1): -7.5 dB  Low frequency bandwidth   1.2 to 1.4 GHz (Width: 0.2 GHz)   0.95 to 1.01 GHz (Width: 0.06 GHz)   High frequency resonant frequency   H1: 2.45 GHz H2: 3 GHz H3: 3.25 GHz H4: 4 GHz   H1: 2.3 GHz H2: 3.1 GHz H3: 3.95 GHz H4: None   High frequency return loss   RL (H1): -13.5 dB RL (H2): -24 dB RL (H3): -22 dB RL (H4): -15.5 dB   RL (H1): -11 dB RL (H2): -37 dB RL (H3): -7 dB RL (H4): None   High frequency bandwidth   2.2 to 4.1 GHz (Width: 1.9 GHz)   2.1 to 2.6 GHz (Width: 0.5 GHz) 2.75 to 3.6 GHz (Width: 0.85 GHz) 3.85 to 4 GHz (Width: 0.15 GHz)

As compared to the above table, after the third body 154 is installed, the wideband antenna 100 causes the low frequency resonant frequency L1 to be lowered and the reflection loss at the frequency L1 is greatly increased to -7.5 dB. In addition, the low frequency bandwidth (BWL) is also slightly reduced (0.06GHz). In addition, the high frequency resonant frequency is lowered in the multiplicity of the quadruple resonance to triple resonance, the reflection loss at each resonant frequency is greatly increased except for the reflection loss at the high frequency secondary resonance frequency (H2), The high frequency bandwidth (BWH) is also reduced.

That is, when the third body 154 is additionally installed in the first body 151 of the unipolar antenna body 150, the characteristics such as the multiplicity of the resonant frequency, the return loss, the bandwidth, etc. are worsened. Likewise, since the return loss at a specific resonance frequency (H2: 3.1 GHz) is significantly lowered (-37 dB), when the broadband antenna 100 is to be used for the purpose of increasing only the reception sensitivity at the frequency H2, An additional body 154 may be used.

As such, factors such as the number, position, length, and width of the open monopole slit 153 and the additional body (for example, the third body 154) formed in the monopole antenna body 150 are appropriately adjusted. When the wideband antenna 100 is designed, a wideband antenna specialized for a frequency band may be designed.

In addition, FIG. 9 illustrates a state in which the thickness of the first body 151 of the unipolar antenna body 150 is deformed. As shown in FIG. 9, when the thickness of the first body 151 is made thicker, The results are shown in a table with reference to FIG. 10 as follows.

If the first body is thin If the first body is thick  Low frequency resonant frequency   L1: 1.3 GHz   L1: 1.1 GHz  Low Frequency Return Loss   RL (L1): -17.5 dB   RL (L1): -11 dB  Low frequency bandwidth   1.2 to 1.4 GHz (Width: 0.2 GHz)   1.05 to 1.25 GHz (Width: 0.2 GHz)   High frequency resonant frequency   H1: 2.45 GHz H2: 3 GHz H3: 3.25 GHz H4: 4 GHz   H1: 2.45 GHz H2: 3 GHz H3: 3.2 GHz H4: 3.95 GHz   High frequency return loss   RL (H1): -13.5 dB RL (H2): -24 dB RL (H3): -22 dB RL (H4): -15.5 dB   RL (H1): -13 dB RL (H2): -18 dB RL (H3): -40.5 dB RL (H4): -13 dB  High frequency bandwidth  2.2 to 4.1 GHz (Width: 1.9 GHz)   2.2 to 4.1 GHz (Width: 1.9 GHz)

As shown in the table, when the thickness of the first body 151 is thickened, the low frequency resonant frequency L1 moves to 1.1 GHz, and the reflection loss at the frequency L1 increases to -11 dB. The low frequency bandwidth (BWL) is moved in parallel to the low frequency region without changing the size. In addition, the high frequency resonant frequencies H1 to H4 are hardly changed, the reflection loss at each frequency H1 to H4 is slightly changed, and the high frequency bandwidth B.W.H is almost unchanged.

As such, by changing the thickness of the first body 151 of the monopole antenna body 150, the resonance frequency, the reflection loss, the position of the bandwidth, etc. can be changed, so that the thickness of the first body 151 can be adjusted appropriately. By doing so, it is possible to design a specialized broadband antenna 100 as necessary when designing the broadband antenna 100.

In addition, the unipolar antenna body 150 is preferably bent at a right angle from one end of the antenna body 120. This is to reduce the overall volume of the broadband antenna 100 so that the electronic device having the broadband antenna 100 can be further miniaturized, and the ground plane 110, the antenna body 120, and the unipolar antenna body ( This is to facilitate the tuning of the frequency bands 150 by coupling to each other.

Meanwhile, the broadband antenna 100 according to the exemplary embodiment of the present invention may further include a stub 160 protruding from an approximately middle portion of the power feeding line 130. The presence of the stub 160 affects the characteristics of the frequency and the impedance matching, which is shown in FIG. 11 with the stub 160 removed. Thus, the case of removing the stub 160 and the case with the stub 160 is shown in the table with reference to Figure 12 as follows.

If you have a stub If you remove the stub  Low frequency resonant frequency   L1: 1.3 GHz   L1: 1.25 GHz  Low frequency return loss   RL (L1): -17.5 dB   RL (L1): -17 dB  Low frequency bandwidth   1.2 to 1.4 GHz (Width: 0.2 GHz)   1.15 to 1.4 GHz (Width: 0.25 GHz)   High frequency resonant frequency   H1: 2.45 GHz H2: 3 GHz H3: 3.25 GHz H4: 4 GHz   H1: 2.35 GHz H2: 3 GHz H3: 3.25 GHz H4: 4 GHz   High frequency return loss   RL (H1): -13.5 dB RL (H2): -24 dB RL (H3): -22 dB RL (H4): -15.5 dB   RL (H1): -13.5 dB RL (H2): -14 dB RL (H3): -25.5 dB RL (H4): -16 dB  High frequency bandwidth   2.2 to 4.1 GHz (Width: 1.9 GHz)   2.2 to 3.35 GHz (Width: 1.15 GHz) 3.7 to 4.2 GHz (Width: 0.5 GHz)

As compared to the above table, when the stub 160 is removed, the low frequency resonant frequency L1 moves to 1.25 GHz, and the reflection loss at that frequency L1 is slightly increased to -17 dB and the bandwidth BWL. Is almost unchanged. In addition, the high frequency resonant frequencies H1 to H4 hardly change, and the reflection loss at the frequency becomes large at the high frequency secondary resonance frequency H2 and decreases at the high frequency tertiary resonance frequency H3, and the high frequency bandwidth BWH is It will be slightly narrower, resulting in discrete band sections (3.35 to 3.7 GHz).

In this way, by providing the stub 160, it can be confirmed that the frequency characteristics can be improved, and the impedance matching is easy. Therefore, by appropriately adjusting the length, thickness, number, etc. of the stub 160, it is possible to design a specialized wideband antenna as needed when designing a wideband antenna.

Meanwhile, an insulating dielectric may be inserted between the antenna body 120 and the ground plane 110. Since the antenna body 120 supplied with current from the ground plane 110 through the feed line 130 is installed in parallel with the upper surface of the ground plane 110, the ground plane 110 and the antenna body 120 are provided. A potential difference occurs between them. In this case, the distance between the antenna body 120 and the ground plane 110 by inserting a dielectric having a dielectric constant greater than that of air compared to the case where only air exists between the antenna body 120 and the ground plane 110. There is an advantage to narrow down. As such, being able to narrow the distance between the antenna body 120 and the ground plane 110 serves as a great advantage in miniaturizing the size of the electronic device.

In this case, the dielectric may be made equal to the area of the antenna body 120 to fill the entirety between the antenna body 120 and the ground plane 110, but if necessary, the antenna may be made smaller than the area of the antenna body 120. Only a portion between the body 120 and the ground plane 110 may be filled.

Broadband antenna 100 according to an embodiment of the present invention configured as described above is a slot 121 to 125, slits 126, 127, feed line 130 in a rectangular flat plate as shown in FIG. After cutting the shape of the ground pin 140, the unipolar antenna body 150, the stub 160, and the like, the power supply line 130 and the ground pin 140 is bent at a right angle to the antenna body 120 By bending the unipolar antenna body 150 at right angles to the antenna body 120, it can be easily manufactured.

Actually, a manufacturing embodiment of manufacturing the wideband antenna 100 is shown in FIG. 13, and the wideband antenna 100 manufactured at the numerical value shown in FIG. 13 is bent, and as shown in FIG. With a size of 8.6 mm (2) x 7 mm (3), the broadband antenna 100 can be manufactured that can be embedded in a very slim mobile terminal.

Meanwhile, an electronic device having a broadband antenna according to another embodiment of the present invention will be described in detail. However, parts and components that perform the same function will be denoted by the same reference numerals and redundant description thereof will be omitted.

14, 15, and 16 illustrate a configuration of an electronic device having a broadband antenna according to another embodiment of the present invention. FIG. 14 is a perspective view of a portable terminal, FIG. 15 is a perspective view of a notebook, and FIG. 16. Is a perspective view of an MP3 player, and FIG. 17 is an enlarged partial cross-sectional view taken along the AA ′ cutting line of FIGS. 14, 15, and 16.

14, 15, and 16 show an electronic device having a broadband antenna according to another embodiment of the present invention, a portable terminal, a notebook computer, an MP3 player, but a mobile terminal such as a mobile phone, a PDA, a car navigation system, Electronic devices that use antennas to transmit and receive radio waves by having built-in communication means, such as portable computers such as laptops, electronic notebooks, electronic dictionaries, or music players such as MP3 players, MD players, radios, audio, etc. All devices will be said to belong to the scope of the invention.

As shown in FIG. 14 and FIG. 17, the portable terminal 200 having the broadband antenna according to another exemplary embodiment of the present invention is slidably coupled to the terminal body 210 and the front surface of the terminal body 210. The slide unit 220 is configured.

Although FIG. 14 shows a slide-type portable terminal composed of a terminal body 210 and a slide unit 220 sliding in front of the terminal body, as well as a folding-type portable terminal coupled to the terminal body and the upper end thereof in a rotatable manner, the terminal body The integrated portable terminal in which the slide unit (or the folder unit) is integrally formed will also be within the scope of the present invention.

Although the portable terminal 200 is illustrated as a portable telephone in FIG. 14, the portable terminal 200 may also apply mutatis mutandis to a PDA or a vehicle-mounted navigation.

The terminal body 210 may include a case 211 forming an enclosure of the terminal body 210, and a circuit board 212 embedded in the case 211 to electrically operate and control the mobile terminal 200. And a broadband antenna 100 embedded in the case 211 and electrically connected to the circuit board 212.

In this case, the ground plane 110 of the broadband antenna 100 may be electrically connected to the circuit board 212 by electrical connection means (eg, wire bonding), but as shown in FIG. 17, the ground plane 110 may be the circuit board 212 itself. That is, the antenna body 120 is installed on the circuit board 212, and the power supply line 130 connecting the circuit board 212 and the antenna body 120 and the antenna body 120 are connected to the circuit board 212. It may also be configured as a ground pin 140 to ground. As such, when the circuit board 212 is replaced without the separate ground plane 110, there is an advantage in that the spatial utilization thereof is widened.

The slide unit 220 is provided with a display unit 221 formed on the front surface of the slide unit 220 to display information.

In the case of the mobile terminal 200 having the broadband antenna according to another exemplary embodiment of the present invention, the broadband antenna 100 is configured to be embedded in the terminal body 210, but the broadband antenna 100 may be connected to the terminal body ( In addition to the inside of the 210, the slide unit 220 may be embedded in the inside of the portable terminal 200.

On the other hand, as shown in Figure 15 and 17, the notebook 300 having a broadband antenna according to another embodiment of the present invention, the notebook body 310, and the top of the notebook body 310 to be rotatable The display unit 320 is coupled.

The notebook 300 refers to a portable portable computer, and may be applied to an electronic notebook, an electronic dictionary, and the like.

The notebook body 310 may include a case 211 forming an enclosure of the notebook body 310, a circuit board 212 embedded in the case 211 to electrically operate and control the notebook 300. In addition, a broadband antenna 100 is built in the case 211 and electrically connected to the circuit board 212.

In this case, as shown in FIG. 17, the ground plane 110 of the broadband antenna 100 may be electrically connected to the circuit board 212 by electrical connection means (eg, wire bonding), but the ground plane As described above, the 110 may be the circuit board 212 itself.

The display unit 320 displays information transmitted by the circuit board 212. The circuit board 212 may be embedded in the notebook body 310, but may be embedded in the display unit 320. Of course you can.

Meanwhile, as shown in FIGS. 16 and 17, the MP3 player 400 having the broadband antenna according to another embodiment of the present invention includes an MP3 player body 410 and an MP3 player body 410. The display unit 420 is formed on the front of the display to display information, the input unit 430 is formed on one side of the MP3 player body 410 and connected to one side of the MP3 player body 410, the user is connected It is composed of an earphone 440 that can listen to music by plugging into the ear.

MP3 player (MP3) 400 refers to a player capable of playing MP3 (MP3: MPEG Audio Layer-3) files, and can receive radio waves as well as receive MP3 files. Therefore, the present invention can be applied to a music player such as an MD (Mini-Disk) player having a radio wave reception function, a radio, an audio, and the like.

The MP3 player main body 400 includes a case 211 forming an enclosure, a circuit board 212 built in the case 211 to electrically operate and control the MP3 player 400, and a case ( 211 and a broadband antenna 100 that is electrically connected to the circuit board 212.

In this case, as shown in FIG. 17, the ground plane 110 of the broadband antenna 100 may be electrically connected to the circuit board 212 by electrical connection means (eg, wire bonding), but the ground plane As described above, the 110 may be the circuit board 212 itself.

As shown in FIG. 17, a broadband antenna electrically connected to a circuit board 212 may be formed in an electronic device 200, 300, or 400 having a broadband antenna according to another embodiment of the present invention. Since the antenna 100 is built in, the radio wave can be transmitted and received through the antenna body 120 and the monopole antenna body 150 of the broadband antenna 100.

In addition, since the broadband antenna 100 according to the embodiment of the present invention is provided, as described above, it is possible to transmit and receive clean and accurate radio waves in a wide frequency band including a low frequency band and a high frequency band. That is, the advantages of the flat type inverted F antenna suitable for the high frequency band and the advantages of the monopole antenna suitable for the low frequency band can be accommodated as they are.

In the above described exemplary embodiments of the present invention by way of example, the scope of the present invention is not limited to the specific embodiments as described above, the scope of the invention by those skilled in the art to the claims It can be changed as appropriate within the scope described.

As described above, the present invention provides a wideband antenna which can be miniaturized, embedded in an electronic device, and easily manufactured.

In addition, the present invention provides a wideband antenna in which at least one open slit and at least one slot form a specific pattern, thereby greatly improving the bandwidth of the frequency and generating multiple resonances.

In addition, the present invention provides a wideband antenna that is suitable for a low frequency band by having a unipolar antenna body, and has a unipolar slit open to the unipolar antenna body to improve low frequency bandwidth and reduce reflection loss.

In addition, the present invention provides a wideband antenna that is easy to tune a frequency band as needed by providing a stub.

However, the present invention is not established only when all of the above effects are exerted.

Claims (25)

A ground plane formed in a finite plane; An antenna body of a conductor installed on the ground plane; A feed line electrically interconnecting the antenna body and the ground plane and having a stub formed therein; A ground pin for grounding the antenna body to the ground plane; Including, And at least one slot and at least one slit connected to the antenna body from one side to one end of the antenna body. The method of claim 1, The antenna body is a broadband antenna, characterized in that consisting of a rectangular plate shape. The method of claim 1, And a dielectric is inserted between the antenna body and the ground plane. The method of claim 1, At least one of the slits is one end of the antenna body, the broadband antenna, characterized in that connected to open between the feed line and the ground pin. A ground plane formed in a finite plane; An antenna body of a conductor installed on the ground plane; A feed line electrically interconnecting the antenna body and the ground plane and having a stub formed therein; A ground pin for grounding the antenna body to the ground plane; Including, The antenna body includes a first slot, a second slot, a third slot, and a fourth slot, which are parallel to each other, and a fifth slot that interconnects the second slot, the third slot, and the fourth slot. Formed, Broadband antennas, characterized in that the end of the first slot and the second slot is formed with a first slit and a second slit connected to open to one end of the antenna body, respectively. The method of claim 5, And the antenna body comprises a rectangular flat plate. The method of claim 5, And the first slit and the second slit are connected to each other until the opposite ends of the antenna body are opened. The method of claim 5, The second slit is a broadband antenna, characterized in that connected to open between the feed line and the ground pin. A ground plane formed in a finite plane; A flat antenna body of a conductor installed on the ground plane; A feed line electrically connecting the planar antenna body and the ground plane and having a stub formed thereon; A ground pin for grounding the flat antenna body to the ground plane; A monopole antenna body electrically connected to the planar antenna body; Broadband antenna, characterized in that comprising a. The method of claim 9, And the planar antenna body has a rectangular flat plate shape. The method of claim 9, The unipolar antenna body, A first body installed parallel to the flat antenna body; A second body interconnecting an end of the first body and an end of the planar antenna body; Including, And a monopole slit formed between the planar antenna body and the first body. The method of claim 11, And the second body is bent at a right angle from the flat antenna body. The method of claim 9, And a dielectric is inserted between the ground plane and the planar antenna body. delete delete delete delete delete delete delete delete delete delete A broadband antenna according to any one of claims 1 to 13; It is built in Electronic device having a broadband antenna for transmitting and receiving radio waves through the broadband antenna. The method of claim 24, The electronic device having a broadband antenna, characterized in that any one of a portable terminal, a notebook or MP3 player.

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