WO2012097652A2

WO2012097652A2 - Cmmb antenna, cmmb earphone antenna and mobile terminal

Info

Publication number: WO2012097652A2
Application number: PCT/CN2011/083776
Authority: WO
Inventors: 钟光华
Original assignee: 华为终端有限公司
Priority date: 2011-12-09
Filing date: 2011-12-09
Publication date: 2012-07-26
Also published as: WO2012097652A3; CN102725907B; CN102725907A

Abstract

The present invention provides a CMMB antenna, a CMMB earphone antenna, and a mobile terminal, which belong to the field of antennas. The CMMB antenna comprises a plug to be connected to a first earphone socket of the mobile terminal, a wire, and a second earphone socket. The wire comprises an earphone wire, a ground wire, and an antenna body. The earphone wire and the ground wire have one end connected to the plug, and the other end connected to the second earphone socket. The structure of the second earphone socket is the same as the structure of the first earphone socket. A high-rejection low-pass component is connected to the ground wire in series. One end of the antenna body is connected between the high-rejection low-pass component and the plug. The other end of the antenna body is suspended, and the length of the antenna body is between 9 cm and 16 cm. In the embodiments of the present invention, a high-rejection low-pass component is connected to the ground wire, the antenna body is connected between the high-rejection low-pass component and the plug, and the length of the antenna body is set between 9 cm and 16 cm, so that the CMMB signal has the desirable resonance, thus achieving the good reception performance.

Description

CMMB antenna and CMMB earphone antenna and mobile terminal

The present invention relates to the field of antennas, and in particular to a CMMB (China Mobile Multimedia Broadcasting, China Mobile Multimedia Broadcasting) antenna and a CMMB earphone antenna and a mobile terminal. BACKGROUND OF THE INVENTION In the increasingly information age of multimedia, CMMB mobile TV has gradually become a standardized configuration of mobile terminals. Since users usually watch CMMB TV programs in public, in order to avoid affecting others when watching CMMB TV programs, they usually use headphones to play sounds, so you need to carry your headphones with you. At the same time, to be in the static book

In the high-speed mobile environment, clear and smooth CMMB TV programs can be used, and high-performance CMMB antennas are needed. In order to reduce the size of mobile terminals, existing CMMB antennas are usually external. In this way, each time the user goes out, in addition to carrying the headset, he also needs to carry a separate antenna device, which is easy to lose, and is also cumbersome to use. In this case, there is a type of earphone that can realize the function of the antenna, which is convenient for the user to carry and use, and the user experience is greatly improved. This type of earphone is also called an earphone antenna.

The existing earphone antenna usually includes two earphone wires, a microphone wire and a ground wire, wherein the ground wire serves as a return line of the earphone wire and the microphone wire, and also serves as an antenna, and the ground wire of the existing earphone. The length is usually about lm, and the CMMB signal cannot be well resonated in the earphone antenna, so the existing earphone antenna has poor reception performance and cannot meet the needs of users who watch CMMB television programs. Summary of the invention

In order to overcome the defect that the earphone antenna has poor reception performance of the CMMB signal in the prior art, the embodiment of the present invention provides a CMMB antenna and a CMMB earphone antenna and a mobile terminal. The technical solution is as follows:

In one aspect, an embodiment of the present invention provides a China Mobile Digital Multimedia Broadcasting CMMB antenna, the antenna including a plug, a wire, and a second earphone jack for connecting to a first earphone jack of the mobile terminal, wherein the wire includes a headphone cable And a ground wire and an antenna body, wherein one end of the earphone wire and the ground wire is connected to the plug, and the other end of the earphone wire and the ground wire is connected to the second earphone jack, and the structure of the second earphone jack is The first earphone jack has the same structure, and the ground line is connected in series with a low frequency blocking high frequency device, and one end of the antenna body is connected between the low frequency high frequency blocking device and the plug, The other end of the antenna body is suspended, and the length of the antenna body is 9-16 cm. In another aspect, the embodiment of the present invention further provides a mobile terminal, where the mobile terminal includes a China Mobile Digital Multimedia Broadcasting CMMB antenna, and the antenna includes a plug and a wire for connecting with a first earphone jack of the mobile terminal. And the second earphone jack, the electric wire includes an earphone wire, a ground wire and an antenna body, one end of the earphone wire and the ground wire is connected to the plug, and the other end of the earphone wire and the ground wire and the second earphone a socket connection, the structure of the second earphone jack is the same as that of the first earphone jack, the ground line is connected in series with a low frequency blocking high frequency device, and one end of the antenna body is connected to the low frequency resistance Between the high frequency device and the plug, the other end of the antenna body is suspended, and the length of the antenna body is 9-16 cm.

In another aspect, an embodiment of the present invention further provides a China Mobile Digital Multimedia Broadcasting CMMB earphone antenna, the earphone antenna including a plug, a wire and a earphone for connecting with a first earphone jack of the mobile terminal, the wire including the earphone a wire, a ground wire, and an antenna body, wherein one end of the earphone wire and the ground wire is connected to the plug, and the other end of the earphone wire and the ground wire is connected to the earphone, and the ground wire is connected in series with a low frequency resistance In the high-frequency device, one end of the antenna body is connected between the pass-through low-frequency high-frequency device and the plug, and the other end of the antenna body is suspended, and the length of the antenna body is 9-16 cm.

In another aspect, an embodiment of the present invention further provides a mobile terminal, where the mobile terminal includes a China Mobile Digital Multimedia Broadcasting CMMB earphone antenna, and the earphone antenna includes a plug for connecting with a first earphone jack of the mobile terminal. The electric wire includes an earphone wire, a ground wire, and an antenna body, and one end of the earphone wire and the ground wire is connected to the plug, and the other end of the earphone wire and the ground wire is connected to the earphone. The grounding line is connected in series with a low frequency blocking high frequency device, one end of the antenna body is connected between the low frequency high frequency blocking high frequency device and the plug, the other end of the antenna body is suspended, and the antenna The length of the body is 9~16cm.

The technical solution provided by the embodiment of the present invention has the beneficial effects of: connecting one end of the antenna body to the low frequency high frequency blocking device and the plug by providing a low frequency blocking high frequency device on the ground line. Between the other ends, the other end is suspended, and the length of the antenna body is set to 9~16cm, so that the CMMB signal can be well resonated, thereby obtaining good receiving performance, and for the earphone and the microphone path, the signals are In the audio range, the frequency is lower than 20KHz, and the signal can pass through the low frequency blocking high frequency device unimpeded. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings. FIG. 1 is a schematic structural diagram of a CMMB antenna according to Embodiment 1 of the present invention.

2 is a schematic structural diagram of a CMMB earphone antenna according to Embodiment 2 of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Example 1

As shown in FIG. 1, an embodiment of the present invention provides a CMMB antenna including a plug 11 for connecting to a first earphone jack of a mobile terminal, and a second earphone jack 12. The second earphone jack 12 is for plugging in an existing earphone. The wires include headphone cables L1 and Rl, a microphone line MIC1, a ground line G1, and an antenna body ANT1. The headphone wires L1 and R1, the microphone cable MIC1 and the ground wire G1 are connected to the plug 11 at one end, and the other ends of the headphone wires L1 and R1, the microphone wire MIC1 and the ground wire G1 are connected to the second earphone jack 12. A grounding line G1 is connected in series with a low frequency blocking high frequency device Z1, one end of the antenna body ANT1 is connected between the low frequency blocking high frequency device Z1 and the plug 11, the other end of the antenna body ANT1 is suspended, and the length of the antenna body ANT1 It is 9~16cm.

Further, the structure of the second earphone jack 12 may be the same as or different from the structure of the first earphone jack of the mobile terminal.

Preferably, the antenna body ANT1 has a length of 12 to 14 cm.

Further, the low frequency blocking high frequency device Z1 may be a magnetic bead, or an inductor.

Furthermore, the frequency of the magnetic beads is 470MHz~754MHz, the impedance is greater than 600 Ω; the inductance of the inductor is greater than 470nH o

Preferably, one end of the low frequency blocking high frequency device Z1 is directly connected to the plug 11, and the other end is connected to one end of the ground line G1. At this time, one end of the antenna body ANT1 is directly connected to one end of the plug 11 and the ground line G1, so as to avoid the three-port power split phenomenon and reduce the received signal strength, so that the CMMB signal can be better received.

More preferably, the earphone lines L1 and R1 and the microphone line MIC1 can also be connected to the low frequency blocking high frequency device (not shown) to reduce the coupling of the antenna body ANT1 and the earphone lines L1, R1 and the microphone line MIC1 to avoid signals. Since the line-to-line coupling capacitance is bypassed from the headphone lines L1, R1 and the microphone line MIC1.

Preferably, the electric wire is provided with a storage box (not shown) for accommodating the low frequency blocking high frequency device Z1. The storage box can be similar to the existing small volume control box and is beautiful.

It should be noted that the electric wire in this embodiment may not include the microphone line MIC1. In this case, when the earphone is connected to the mobile terminal through the CMMB antenna, only the earphone can be listened to and the call cannot be made. Further, an embodiment of the present invention further provides a mobile terminal, where the mobile terminal includes the foregoing CMMB antenna. In the embodiment of the present invention, the antenna body is connected between the low frequency blocking high frequency device and the plug by setting a low frequency blocking high frequency device on the ground line, and the length of the antenna body is set to 9~16 cm, thereby The CMMB signal is well resonated, and good reception performance is obtained. In use, the plug is inserted into the first earphone jack of the mobile terminal, and then the existing earphone is inserted into the second earphone jack. For the earphone and the microphone path, the signal can pass through the low frequency blocking high frequency device unimpeded, without being affected. Therefore, it is very convenient to use the embodiment of the present invention without changing the existing earphone structure. When not in use, the CMMB antenna of the present invention can be directly inserted into a mobile terminal or an existing earphone for convenient carrying. Example 2

As shown in FIG. 2, an embodiment of the present invention provides a CMMB earphone antenna including a plug 21, an electric wire, an earphone 22, and a microphone 23 for connection with a first earphone jack of the mobile terminal. The wires include headphone cables L2 and R2, microphone cable MIC2, ground wire G2, and antenna body ANT2. One end of the earphone wires L2 and R2 is connected to the plug 21, and the other end of one end of the earphone wires L2 and R2 is connected to the earphone 22, one end of the microphone wire MIC2 is connected to the plug 21, and the other end of the microphone wire MIC2 is connected to the microphone 23, the ground wire. One end of the G2 is connected to the plug 21, and the other end of the ground line G2 is connected to the earphone 22 and the microphone 23, respectively. The grounding line G2 is connected in series with the low frequency blocking high frequency device Z2, the antenna body ANT2 is connected between the low frequency blocking high frequency device Z2 and the plug 21, the other end of the antenna body ANT2 is suspended, and the length of the antenna body ANT2 is 9 ~16cm.

Preferably, the antenna body ANT2 has a length of 12 to 14 cm.

Further, the low frequency blocking high frequency device Z2 may be a magnetic bead, or an inductor.

Furthermore, the frequency of the magnetic beads is 470MHz~754MHz, and the impedance is greater than 600Ω; the inductance of the inductor is greater than 470nH.

Preferably, one end of the low frequency blocking high frequency device Z2 is directly connected to the plug 21, and the other end is connected to one end of the ground line G2. At this time, one end of the antenna body ANT2 is directly connected to one end of the plug 21 and the ground line G2, so that the three-port power split phenomenon is avoided to reduce the received signal strength, so that the CMMB signal can be better received.

More preferably, the earphone lines L2 and R2 and the microphone line MIC2 can also be connected to the low frequency blocking high frequency device (not shown) to reduce the coupling of the antenna body ANT1 and the earphone lines L2, R2 and the microphone line MIC2 to avoid signals. Since the line-to-line coupling capacitance is bypassed from the headphone lines L2, R2 and the microphone line MIC2.

Preferably, the electric wire is provided with a storage box (not shown) for accommodating the low frequency blocking high frequency device Z2. The storage box can be similar to the existing small box of volume control, and is beautiful. It should be noted that the CMMB earphone antenna in this embodiment may not include the microphone 23, and accordingly, the wire does not include the microphone line MIC2. In this case, the CMMB earphone antenna does not have a call function.

Further, an embodiment of the present invention further provides a mobile terminal, where the mobile terminal includes the CMMB earphone antenna.

In the embodiment of the present invention, the antenna body is connected between the low frequency blocking high frequency device and the plug by setting a low frequency blocking high frequency device on the ground line, and the length of the antenna body is set to 9~16 cm, thereby The CMMB signal is well resonated, and good reception performance is obtained. For the headphone and microphone channels, the signal can pass unimpeded through the low frequency blocking high frequency device without being affected. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Claim

A CMMB antenna for China Mobile Digital Multimedia Broadcasting, characterized in that: the antenna comprises: a plug, a wire and a second earphone jack for connecting to a first earphone jack of the mobile terminal, the wire comprising a headphone cable, a ground a wire and an antenna body, one end of the earphone wire and the ground wire are connected to the plug, and the other end of the earphone wire and the ground wire is connected to the second earphone jack, and the ground wire is connected in series with a low frequency resistance In the high-frequency device, one end of the antenna body is connected between the pass-through low-frequency high-frequency device and the plug, and the other end of the antenna body is suspended, and the length of the antenna body is 9-16 cm.

The CMMB antenna according to claim 1, wherein the antenna body has a length of 12 to 14 cm.

3. The CMMB antenna according to claim 1, wherein the low frequency blocking high frequency device is a magnetic bead or an inductor.

4. The CMMB antenna according to claim 3, wherein the magnetic bead has a frequency of 470 MHz to 754 MHz and an impedance greater than 600 Ω; and the inductance of the inductor is greater than 470 nH.

The CMMB antenna according to any one of claims 1 to 4, wherein one end of the low frequency blocking high frequency device is directly connected to the plug, and the other end of the low frequency blocking high frequency device is One end of the ground wire is connected.

The CMMB antenna according to any one of claims 1 to 4, wherein the electric wire further comprises a microphone wire, one end of the microphone wire is connected to the plug, and the other end of the microphone wire is The second earphone jack is connected.

The CMMB antenna according to claim 6, wherein the earphone line and the microphone line are respectively connected with a low frequency blocking high frequency device.

The CMMB antenna according to any one of claims 1 to 4, wherein the electric wire is provided with a storage case for accommodating the low-frequency blocking high-frequency device.

9. A China Mobile Digital Multimedia Broadcasting CMMB earphone antenna, characterized in that the earphone antenna comprises a plug, a wire and an earphone for connecting with a first earphone jack of the mobile terminal, the electric wire comprising a headphone wire, a ground wire and An antenna body, one end of the earphone wire and the ground wire is connected to the plug, and the other end of the earphone wire and the ground wire is connected to the earphone, and the ground wire is connected in series with a low frequency blocking high frequency device. One end of the antenna body is connected between the pass-through low-frequency high-frequency device and the plug, and the other end of the antenna body is suspended, and the length of the antenna body is 9-16 cm.

The CMMB earphone antenna according to claim 9, wherein the antenna body has a length of 12 to 14 cm.

The CMMB earphone antenna according to claim 9, wherein the pass low frequency blocking high frequency device package Including magnetic beads, or inductors.

12. The CMMB earphone antenna according to claim 11, wherein the magnetic bead has a frequency of 470 MHz to 754 MHz and an impedance greater than 600 Ω; and the inductance of the inductor is greater than 470 nH.

The CMMB earphone antenna according to any one of claims 9 to 12, wherein one end of the pass-through low-frequency blocking high-frequency device is directly connected to the plug, and the other end of the pass-through low-frequency blocking high-frequency device Connected to one end of the ground wire.

The CMMB earphone antenna according to any one of claims 9 to 12, wherein the earphone antenna further comprises a microphone, the electric wire further comprising a microphone wire, and one end of the microphone wire is connected to the plug, The other end of the microphone line is connected to the microphone, and the other end of the ground line is also connected to the microphone.

The CMMB earphone antenna according to claim 14, wherein the earphone line and the microphone line are respectively connected in series with a low frequency blocking high frequency device.

The CMMB earphone antenna according to any one of claims 9 to 12, characterized in that the electric wire is provided with a storage box for accommodating the low frequency blocking high frequency device.

A mobile terminal, comprising the China Mobile Digital Multimedia Broadcasting CMMB antenna according to any one of claims 1 to 8.

A mobile terminal, comprising the China Mobile Digital Multimedia Broadcasting CMMB earphone antenna according to any one of claims 9 to 16.