KR101473714B1 - Wide-band module and communication device including the same - Google Patents

Abstract

Disclosed are a broadband module and a communications device including the broadband module. The broadband module according to an embodiment of the present invention includes: an impedance matching unit which includes a first terminal connected to a feed end of an antenna and a second terminal connected to a feed unit, and is formed by a combination of capacitors or inductors or both for the impedance matching of the antenna; and a switching unit which enables the feed end of the antenna or the first terminal to be connected to the surface of the ground through one of adjustment elements according to an external control signal to move the resonance frequency band of the antenna.

Description

[0001] WIDE-BAND MODULE AND COMMUNICATION DEVICE INCLUDING THE SAME [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadband module and a communication device including the same, and more particularly, to a broadband module and a communication device including the same.

Conventionally, penta band antennas that simultaneously satisfy GSM quad band and W2100 band have been used in various communication apparatuses (communication apparatuses). An example of a conventional antenna that satisfies these characteristics will now be described.

In a conventional inverted F type antenna including a dielectric and a radiator, a part of the radiator becomes a feeding end and a grounding end. The feed stage is connected to the feeding part of the communication device and the ground end is connected to the ground plane of the communication device.

These inverted-F type antennas operate in the service band of the GSM quad band and the W2100 band, and they operate at 824 ~ 960MHz and 1710 ~ 2170MHz based on the frequency.

In recent years, it is required to release an antenna that can operate in the LTE (Long Term Evolution) band in addition to the GSM quad band and the W2100 band at the same time. Especially, it is required to design an antenna that extends the operating band to the LTE low band (800 MHz or less). However, designing small antennas operating below λ / 4 to satisfy all these service bands requires much research due to the following problems.

First, the broadband and high gain of the antenna is a feature that is contrary to miniaturization. In other words, it is very difficult to increase the bandwidth and increase the gain while making the antenna small. Nevertheless, it is a problem in the market because it requires both miniaturization, broadband and high gain of the antenna at the same time.

Second, miniaturization of the antenna has a problem that resonance in a low frequency band is difficult to be drawn. The resonance frequency depends on the size of the antenna. The smaller the resonance frequency, the larger the size of the antenna. Therefore, when an antenna that operates in a frequency band lower than the GSM quad band is designed such as the LTE low band, the size of the antenna must inevitably increase. Therefore, it is difficult to realize miniaturization.

Third, if the service band of the antenna is partially expanded, the conventional designed antenna can not be used as it is. In other words, it can not be designed to operate in the LTE low band while utilizing the antenna designed to satisfy the GSM quad band and W2100 band according to the prior art. Therefore, in order to expand or change the service band, the antenna has to be redesigned. However, if the antenna is designed again from the beginning, there is a problem that the already developed antenna can not be used as it is, so that the effort and capital can not be utilized already.

Korean Patent Publication No. 10-2009-0067896 (2009.06.25)

Embodiments of the present invention provide a broadband module that enables an antenna to smoothly transmit and receive signals at a wide band through an impedance matching unit and a switching unit, and a communication apparatus including the same.

According to an exemplary embodiment of the present invention, there is provided an impedance matching circuit comprising: a first terminal connected to a feeding end of an antenna; and a second terminal connected to the feeding portion, the impedance comprising a combination of at least one of a capacitor and an inductor A matching portion; And a switching unit for allowing the ground terminal of the antenna or the first terminal to be connected to the ground plane through any one of the plurality of adjustment elements in accordance with an external control signal so as to move the resonance frequency band of the antenna, Module is provided.

The impedance matching unit may further include a first line formed with the first terminal and a second line formed with the second terminal, and the impedance matching unit may include a first line, a second line, and a second line, One or more of the capacitor and the inductor may be disposed.

A first tuning element for tuning the resonance frequency of the antenna may be disposed between a third terminal formed in the direction opposite to the first terminal side of the first line and a side of the ground plane adjacent to the third terminal .

A second tuning element for tuning the resonance frequency of the antenna may be disposed between a fourth terminal formed in the direction opposite to the second terminal side of the second line and another side of the ground plane adjacent to the fourth terminal .

Each of the adjustment elements may be a passive element having a different impedance value.

The switching unit may include a first input unit receiving a first voltage from the outside or a second voltage higher than the first voltage by a predetermined magnitude and a second input unit.

The switching unit may connect the ground terminal of the antenna or the first terminal to the ground plane when the second voltage is input to the first input unit.

Wherein the plurality of adjustment elements includes a first adjustment element and a second adjustment element and wherein the switching unit switches the grounding of the antenna through the first adjustment element when the voltage input to the second input unit is the first voltage, Wherein the ground terminal is connected to the ground terminal through the second adjusting element when the voltage input to the second input unit is the second voltage, Lt; / RTI >

A capacitor or an inductor may be disposed between the switching unit and the first terminal.

According to another exemplary embodiment of the present invention, a communication device including the above-described wideband module is provided.

According to the embodiments of the present invention, the impedance of the antenna and the impedance of the feeding part can be matched in a wide bandwidth by disposing the impedance matching part between the antenna and the feeding part.

According to embodiments of the present invention, by shifting the resonant frequency band of the antenna through the operation of the switching unit, service can be performed in most communication bands currently in service, Can be extended. Therefore, it is possible to service up to the LTE frequency band simply by adding a wideband module to the existing antenna.

Further, according to the embodiments of the present invention, the operation of the switching unit allows the antenna to operate in a high frequency band (for example, about 1.7 GHz to 2.2 GHz band (for example, Can be kept constant so as not to deteriorate the antenna performance.

1 is a schematic view for explaining a broadband module according to a first embodiment of the present invention;
2 is a block diagram showing a detailed configuration of a wideband module according to a first embodiment of the present invention;
3 is a diagram illustrating an embodiment of an impedance matching unit in a wideband module according to embodiments of the present invention.
FIG. 4 is a graph showing a comparison between a voltage standing wave ratio (VSWR) of an antenna in which an impedance matching unit according to an embodiment of the present invention is not applied to an antenna,
5 is a graph comparing the average gain and the efficiency of the antenna in the case where the impedance matching unit according to the embodiments of the present invention is not applied to the antenna,
6 is a graph showing a change in voltage standing wave ratio of an antenna according to an operation mode of a switching unit in a wideband module according to the first embodiment of the present invention
7 is a graph illustrating an average gain and efficiency of an antenna according to an operation mode of a switching unit in a wideband module according to a first embodiment of the present invention;
8 is a schematic view for explaining a broadband module according to a second embodiment of the present invention;
9 is a block diagram showing a detailed configuration of a wideband module according to a second embodiment of the present invention
10 is a graph showing a change in voltage standing wave ratio (VSWR) of an antenna according to an operation mode of a switching unit in a wideband module according to a second embodiment of the present invention
11 is a graph showing an average gain and efficiency of an antenna according to an operation mode of a switching unit in a wideband module according to a second embodiment of the present invention;

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, this is an exemplary embodiment only and the present invention is not limited thereto.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The technical idea of the present invention is determined by the claims, and the following embodiments are merely a means for efficiently describing the technical idea of the present invention to a person having ordinary skill in the art to which the present invention belongs.

FIG. 1 is a schematic diagram for explaining a wideband module 100 according to a first embodiment of the present invention, and FIG. 2 is a block diagram showing a detailed configuration of the broadband module 100 shown in FIG. As shown in FIG. 1, the broadband module 100 according to the first embodiment of the present invention may be connected to an antenna 150 built in a communication device (not shown). Here, the communication device may be, for example, a cellular phone, a PDA, a notebook, MP3, or the like. The antenna 150 may include a radiator 152, a dielectric 154, a feed stage 156, and a ground stage 158. The antenna 150 may be a small antenna having a size of? / 4 or less, for example, an inverted F type antenna. However, the shape of the antenna 150 is not limited thereto, and the wideband module 100 may be applied to various types of antennas such as an inverted L type antenna.

2, the wideband module 100 includes an impedance matching unit 110 and a switching unit 120. [

The impedance matching unit 110 performs impedance matching between the power feed unit 180 and the antenna 150. The frequency band in which the antenna 150 operates may be referred to as a first frequency band (used to mean a plurality of frequency bands) if the antenna 150 exists alone without the impedance matching unit 110 and the switching unit 120 I suppose. The impedance matching unit 110 performs impedance matching between the feeder 180 and the antenna 150 in a wide frequency band so that the antenna 150 can operate in a second frequency band that is wider than the first frequency band. Here, the " operation " means a state in which the antenna 150 transmits and receives a signal while having an average gain and efficiency equal to or greater than a predetermined value. 2, the impedance matching unit 110 includes a first terminal 112a connected to the feeding end 156 of the antenna 150, a second terminal 114b connected to the feeding unit 180, A third terminal 112b connected to the first tuning element 132 and a fourth terminal 114a connected to the second tuning element 134. [ The impedance matching unit 110 may be formed of a combination of at least one of a capacitor and an inductor, thereby extending the resonance frequency band of the antenna 150. [

The switching unit 120 may switch the switching module 148 so that the resonant frequency band of the antenna 150 can be shifted. As shown in FIG. 2, the switching unit 120 includes a switching module 148 connected to a ground terminal 158 of the antenna. The switching unit 120 is connected to the ground terminal 158 of the antenna 150 according to an external control signal (for example, a predetermined voltage) so as to move the resonant frequency band of the antenna 150, And switches the switching module 148 to be connected to the ground plane 160 through any one of the switches 142 and 144. Here, each of the first adjusting element 142 and the second adjusting element 144 may be a passive element (for example, a capacitor or an inductor) having a different impedance value. For example, the first adjustment element 142 may be a capacitor having a value of 100 pF, and the second adjustment element 144 may be a capacitor having a value of 10 pF. The switching unit 120 may include an input unit 146 receiving a voltage from the outside and may control the operation of the switching module 148 according to the magnitude of a voltage input through the input unit 146. [ The input unit 146 may include a first input unit EN 146a, a second input unit CTRL 146b, and a third input unit VBATT 146c. The third input unit 146c may receive the battery voltage for the operation of the switching unit 120. [ The battery voltage may be, for example, about 3.5V. The first input unit 146a and the second input unit 146b may receive a voltage for controlling the operation of the switching module 148 from the outside. The switching unit 120 may be configured such that the ground terminal 158 of the antenna 150 is connected to one of the plurality of adjustment elements 142 and 144 according to the magnitude of the voltage applied to the first input unit 146a and the second input unit 146b The switching module 148 can be switched to be connected to the ground plane 160 through the switch module 150. [

First, when the first voltage is applied to the first input unit 146a, the switching unit 120 may shut down the switching module 148 so that the switching operation of the switching module 148 does not occur. The first voltage may be, for example, 2.4V.

If a second voltage higher than the first voltage by a predetermined amount is applied to the first input unit 146a, the switching module 148 may control the plurality of adjustment elements 152a, And may be connected to the ground plane 160 through any one of the ground planes 142 and 144. The second voltage may be, for example, 2.8V. The switching operation of the switching module 148 may occur only when a voltage equal to or greater than a predetermined magnitude is applied to the first input unit 146a. That is, the magnitude of the voltage applied to the first input unit 146a becomes a reference voltage for determining whether the switching module 148 operates.

When the second voltage is applied to the first input 146a and the first voltage is applied to the second input 146b the switching module 148 is coupled to the ground plane 160 via the first adjustment element 142 .

When the second voltage is applied to the first input 146a and the second voltage is applied to the second input 146b, the switching module 148 is connected to the ground plane 160 through the second adjustment element 144, Lt; / RTI > As the switching module 148 is connected to the ground plane 160 through any one of the adjustment elements 142 and 144 having different impedance values, the ground of the antenna 150 is changed, The resonant frequency band can be shifted. Here, the switching module 148 is described as being connected to the ground plane 160 through any one of the two adjusting elements 142 and 144, but this is merely one embodiment, and the number of the adjusting elements is limited to this It does not. The switching unit 120 divides the magnitude of the voltage applied to the second input unit 146b into a first voltage, a second voltage, a third voltage, a fourth voltage, etc. to control the switching operation of the switching module 148 It is possible.

As described above, according to the embodiments of the present invention, the impedance matching unit 110 is disposed between the antenna 150 and the feed unit 180, so that the impedance of the antenna 150 and the impedance of the feed unit 180 are wide Can be matched in bandwidth. The efficiency of transmission and reception of the antenna 150 in a specific frequency band may be lowered when only the impedance matching unit 110 is used. Thus, the embodiments of the present invention can reduce the transmission / reception efficiency of the antenna 150 through the operation of the switching unit 120, So that the service is enabled in most communication bands currently in service. According to the embodiments of the present invention, even when the antenna 150 operates in the low frequency band (for example, about 600 MHz to 680 MHz band) through the operation of the switching unit 120, the high frequency band GHz to 2.2 GHz band) can be kept constant so as not to deteriorate the antenna performance.

3 is a view illustrating an embodiment of the impedance matching unit 110 in the wideband modules 100 and 200 according to the embodiments of the present invention. As shown in FIG. 3, the impedance matching unit 110 includes a first line 112 and a second line 114.

A first terminal 112a is formed at one end of the first line 112 and a third terminal 112b is formed at the other end. The first terminal 112a may be connected to the feeding end 156 of the antenna 150 and the third terminal 112b may be connected to the first tuning element 132. [

A fourth terminal 114a may be formed at one end of the second line 114 and a second terminal 114b may be formed at the other end. The fourth terminal 114a may be connected to the second tuning element 134 and the second terminal 114b may be connected to the feeder 180. [ The first tuning element 132 and the second tuning element 134 are used to finely adjust the resonance frequency band of the antenna 150 and may be a combination of at least one of a capacitor and an inductor. Although the first tuning element 132 is shown connected to the first terminal 112a and the second tuning element 134 is connected to the fourth terminal 114a, this is only one embodiment, The positions of the tuning element 132 and the second tuning element 134 may vary depending on the shape of the impedance matching portion 110, the resonance frequency of the antenna 150, and the like.

One or more capacitors and inductors may be disposed between the first line 112, the second line 114, and the first line 112 and the second line 114. For example, the first capacitor C1 may be disposed on the first line 112 between the first terminal 112a and the third terminal 112b, and the fourth terminal 114a and the second terminal 114b may be disposed on the first line 112 between the first terminal 112a and the third terminal 112b. A second capacitor C2 may be disposed on the second line 114 between the first and second lines. A third capacitor C3, a first inductor L1, a second inductor L2 and a fourth capacitor C4 may be disposed between the first line 112 and the second line 114 . The second inductor L2 and the fourth capacitor C4 may be disposed close to the first ends 112a and 114a of the first line 112 and the second line 114, The first inductor L1 and the first inductor L1 may be disposed close to the other ends 112b and 114b of the first line 112 and the second line 114, respectively. Although the impedance matching unit 110 is shown as a combination of the four capacitors C1, C2, C3, and C4 and the two inductors L1 and L2 in this embodiment, this is merely one embodiment, and the capacitor and the inductor Is not limited to this. In addition, the arrangement of the capacitor and the inductor shown in FIG. 3 is only one embodiment and is not limited thereto. The impedance matching portion 110 may be formed by combining one or more capacitors and inductors in different forms as shown in FIG.

4 is a graph comparing the voltage standing wave ratio (VSWR) of the antenna 150 when the impedance matching unit 110 is not applied to the antenna 150 according to the embodiments of the present invention Graph. 4 (a) is a graph showing a voltage standing wave ratio when the impedance matching unit 110 according to the embodiments of the present invention is not applied to the antenna 150, and FIG. 4 (b) And is a graph showing the voltage standing wave ratio when the impedance matching unit 110 according to the embodiments is applied to the antenna 150. FIG. As shown in FIG. 4, when the impedance matching unit 110 is applied to the antenna 150, it can be seen that the overall bandwidth is expanded. In particular, it can be seen that the voltage standing wave ratio falls to 2 or less in the LTE low band (800 MHz or less). That is, the impedance matching unit 110 is disposed between the antenna 150 and the power feed unit 180, so that the impedance of the antenna 150 and the impedance of the power feed unit 180 can be matched in a wide bandwidth. When the impedance matching unit 110 including the capacitor and the inductor is applied to the antenna 150, the capacitance and the inductance value can be easily adjusted as compared with a case where a general impedance converter is applied. Therefore, There is an advantage that it is easy to change.

5 is a graph comparing the average gain and the efficiency of the antenna 150 when the impedance matching unit 110 is not applied to the antenna 150 according to the embodiments of the present invention. 5A is a graph showing the average gain and efficiency when the impedance matching unit 110 according to the embodiments of the present invention is not applied to the antenna 150. FIG. In which the impedance matching unit 110 is applied to the antenna 150 according to the embodiments of the present invention. As shown in FIG. 5, when the impedance matching unit 110 is applied to the antenna 150, it can be seen that the average gain and efficiency in the low frequency band (698 MHz to 787 MHz band) are improved. The average gain and efficiency may decrease in some sections. However, this can be improved by combining the impedance matching section 110 with the switching section 120 described above.

6 is a graph showing a change in the voltage standing wave ratio of the antenna 150 according to the operation mode of the switching unit 120 in the wideband module 100 according to the first embodiment of the present invention.

Hereinafter, as shown in Table 1, when the second voltage V _High is input to the first input unit EN 146a and the first voltage V _Low is input to the second input unit CTRL 146b, A mode in which the switching module 148 is connected to the ground plane 160 through the first adjustment element RF1 142 is assumed to be a first operation mode (State 1), and a second input voltage (V _High) is input and the second input unit is the second voltage (V _High) input to (146b), the switching module 148 is the second adjusting device; that is connected to the ground plane 160 through via (RF2 144) Mode is assumed to be a second operation mode (State 2) and a mode in which the first voltage V _Low is input to the first input unit 146a and the switching module 148 is shut down is referred to as a third operation mode 3).

Operation mode (State) The first input unit (EN) The second input unit (CTRL) RF Path One The second voltage (V _High ) The first voltage (V _Low ) The first adjusting element RF1, 2 The second voltage (V _High ) The second voltage (V _High ) The second adjusting element RF2 3 The first voltage (V _Low ) - Shutdown

As shown in FIG. 6, the antenna 150 may operate in an operation mode 1 (State 1), an operation mode 2 (State 2), or an operation mode 3 (State 3). In operation mode 1, the frequency band of 2G (GSM 850 / PCS frequency band), the frequency band of 3G (WCDMA W1 / 2 / 4/5) and the frequency band of 4G (LTE B1 / 2/4/5/12 / It can be confirmed that the antenna 150 can operate. In the operation mode 2, it is confirmed that the antenna 150 can operate in a frequency band of 620 MHz to 680 MHz, a frequency band of 2G (GSM 850 / PCS frequency band), and a frequency band of 3G (WCDMA W1 / 2 / 4/5) . Also, in the operation mode 3, it can be seen that the antenna 150 can operate in the frequency band of 640 MHz to 680 MHz, the 2G frequency band (GSM 850 / PCS frequency band), the W2 / 5 frequency band and the LTE B29 frequency band. Particularly, in the operation modes 2 and 3, it can be seen that the resonance frequency of the antenna 150 extends to the frequency band of 600 MHz earlier. That is, according to the embodiments of the present invention, the resonance frequency band of the antenna 150 is moved through the operation of the switching unit 120 to enable service in most communication bands currently in service, It can be extended to about 600MHz. Accordingly, it is possible to perform service up to the LTE frequency band only by adding the wideband module 100 to the existing antenna 150. [

7 is a diagram illustrating an average gain and an efficiency of an antenna 150 according to an operation mode of a switching unit 120 in a wideband module 100 according to a first embodiment of the present invention. As described above, the wideband module 100 enables the antenna 150 to operate in different frequency bands according to the operation mode of the switching unit 120. [ In the operation mode 1, it can be confirmed that the antenna 150 operates smoothly in the frequency band of 700 MHz to 920 MHz and the frequency band of 1.71 GHz to 2.17 GHz. In the operation mode 2, it can be confirmed that the antenna 150 operates smoothly in the frequency band of 620 MHz to 680 MHz, the frequency band of 820 MHz to 920 MHz, and the frequency band of 1.71 GHz to 2.17 GHz. In the operation mode 3, it is confirmed that the antenna 150 operates smoothly in the frequency band of 640 MHz to 720 MHz, the frequency band of 820 MHz to 920 MHz, and the frequency band of 1.71 GHz to 1.99 GHz. That is, according to embodiments of the present invention, the resonance frequency band of the antenna 150 can be easily moved through the operation of the switching unit 120, thereby enabling service in most communication bands currently in service . Particularly, according to the embodiments of the present invention, even when the antenna 150 operates in the low frequency band (for example, about 600 MHz to 680 MHz band) through the operation of the switching unit 120, It is possible to keep the performance of the antenna 150 at a constant level in a range of about 1.7 GHz to 2.2 GHz.

FIG. 8 is a schematic diagram for explaining a wideband module 200 according to a second embodiment of the present invention, and FIG. 9 is a block diagram showing a detailed configuration of a wideband module 200 according to a second embodiment of the present invention. The wideband module 200 according to the second embodiment of the present invention includes the broadband module 100 according to the first embodiment of the present invention except for that the switching module 148 is connected to the first terminal 112a, And has the same configuration.

As shown in FIG. 9, in the broadband module 200 according to the second embodiment of the present invention, the switching module 148 is connected to the first terminal 112a. The first terminal 112a may be connected to the feeding end 156 of the antenna 150, as described above. At this time, a capacitor or an inductor 202 may be disposed between the switching module 148 and the first terminal 112a of the switching unit 120. In this case, the operation method of the wideband module 200 and the effect thereof are the same as those in the case of using the wideband module 100 according to the first embodiment, although the resonance frequency band of the antenna 150 is slightly different. Therefore, the detailed configuration and operation method of the wideband module 200 which are the same as those described above will be omitted here.

10 is a graph showing a change in voltage standing wave ratio (VSWR) of an antenna according to an operation mode of the switching unit 120 in a wideband module 200 according to a second embodiment of the present invention. As shown in FIG. 10, the antenna 150 may operate in an operation mode 1 (State 1), an operation mode 2 (State 2), or an operation mode 3 (State 3). The operation modes 1 (State 1), 2 (State 2) and 3 (State 3) shown in FIG. 10 are as described in [Table 1]. In operation mode 1, it can be seen that the antenna 150 can operate in the LTE B1 / 2/4/12/13/17/29, W1 / 2/4 and DCS / PCS frequency bands. In the operation mode 2, it can be confirmed that the antenna 150 can operate in the frequency band of GSM 850/900. In operation mode 3, it can be seen that the antenna 150 can operate in the GSM 850 frequency band. That is, according to the second embodiment of the present invention, the resonance frequency band of the antenna 150 is moved through the operation of the switching unit 120, thereby enabling service in most communication bands currently in service.

11 is a diagram illustrating an average gain and efficiency of an antenna 150 according to an operation mode of a switching unit 120 in a wideband module 200 according to a second embodiment of the present invention. The wideband module 200 enables the antenna 150 to operate in different frequency bands according to the operation mode of the switching unit 120. [ In the operation mode 1, it can be confirmed that the antenna 150 operates smoothly in the frequency band of 698 MHz to 894 MHz and the frequency band of 1.71 GHz to 2.17 GHz. In the operation mode 2, it is confirmed that the antenna 150 operates smoothly in the frequency band of 824 MHz to 960 MHz and the frequency band of 1.85 GHz to 2.17 GHz. In the operation mode 3, it can be confirmed that the antenna 150 operates smoothly in the frequency band of 824 MHz to 894 MHz. That is, according to the embodiments of the present invention, the antenna 150 can operate in a plurality of frequency bands through the operation of the switching unit 120, thereby enabling service in most communication bands currently in service. Particularly, according to the embodiments of the present invention, even when the antenna 150 operates in the low frequency band (for example, the frequency band of about 700 MHz) through the operation of the switching unit 120, the high frequency band It is possible to keep the performance of the antenna 150 at a constant level in a range of about 1.7 GHz to 2.2 GHz.

Meanwhile, a communication device (not shown) according to embodiments of the present invention may include the above-described wideband module 100 or 200. [ The communication device includes a built-in antenna and may be, for example, a mobile phone, a PDA, a notebook, MP3, or the like. The above-described wideband module 100 or 200 may be embedded in the communication device, for example, in the form of a chip.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100, 200: Broadband module
110: Impedance matching part
112: first line
112a: first terminal
112b: third terminal
114: second line
114a: fourth terminal
114b: second terminal
120:
132: first tuning element
134: second tuning element
142: first adjusting element
144: second adjusting element
146:
146a: first input unit
146b:
146c: third input section
148: Switching module
150: Antenna
152: emitter
154: Dielectric
156: Feed shearing
158:
160: ground plane
170: printed circuit board
180: Feeding part
202: Capacitor (or inductor)

Claims (10)

A first terminal connected to a feeding end of an antenna operating in a first frequency band, and a second terminal connected to a feeding part, wherein the antenna is operated in a second frequency band wider than the first frequency band, An impedance matching unit for performing impedance matching between the feeding part and the antenna; And
And a ground terminal of the antenna or a first terminal of the antenna is connected to one of a plurality of adjustment elements having different impedance values according to an external control signal so as to move the resonance frequency band of the antenna operating in the second frequency band And a switching unit for connecting to the ground plane,
The impedance matching unit may further include a first line formed with the first terminal and a second line formed with the second terminal, and the impedance matching unit may include a first line, a second line, and a second line, Wherein at least one of a capacitor and an inductor is disposed.
delete The method according to claim 1,
Wherein a first tuning element for tuning the resonance frequency of the antenna is disposed between a third terminal formed in the direction opposite to the first terminal side of the first line and a side of the ground plane adjacent to the third terminal, module.
The method according to claim 1,
And a second tuning element for tuning the resonance frequency of the antenna is disposed between a fourth terminal formed in the direction opposite to the second terminal side of the second line and another side of the ground plane adjacent to the fourth terminal, module.
delete The method according to claim 1,
Wherein the switching unit includes a first input unit and a second input unit receiving a first voltage from the outside or a second voltage higher than the first voltage by a predetermined amount.
The method of claim 6,
Wherein the switching unit connects the ground terminal of the antenna or the first terminal to the ground plane when the second voltage is input to the first input unit.
The method of claim 7,
The plurality of adjustment elements include a first adjustment element and a second adjustment element,
Wherein the switching unit connects the ground terminal of the antenna or the first terminal to the ground through the first adjusting element when the voltage input to the second input unit is the first voltage, Connects the ground terminal of the antenna or the first terminal to the ground plane via the second adjustment element when the voltage being applied is the second voltage.
The method according to claim 1,
And a capacitor or an inductor is disposed between the switching unit and the first terminal.
A communication device comprising the broadband module according to any one of claims 1, 3, 4, and 6 to 9.

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