EP2698867B1

EP2698867B1 - Connector

Info

Publication number: EP2698867B1
Application number: EP13150297.3A
Authority: EP
Inventors: Po-Kang Wang; Jen-Tse Liu
Original assignee: Arcadyan Technology Corp
Current assignee: Arcadyan Technology Corp
Priority date: 2012-08-16
Filing date: 2013-01-04
Publication date: 2017-11-08
Anticipated expiration: 2033-01-04
Also published as: EP2698867A1; TWI495210B; TW201409871A

Description

The present invention relates generally to a connector and, in particular to a combination of a connector and a signal switching apparatus capable of switching different antenna signals.
As the wireless communication products are getting popularized, many wireless communication devices have internal antennas installed near the main circuit of the device. These internal antennas are confined by limited space and the interference of the circuit, etc., so that the effects of transmitting and receiving signals become disadvantageous. Therefore, some of the wireless communication product products will be reserved spaces for connecting the external antenna to improve the above-mentioned problems.
When the external antenna is not connected to the wireless communication device, built-in antenna will be connected to the RF circuit within the device, but when the external antenna is connected, the mechanism for disconnecting the built-in antenna and connecting the external antenna will be needed. Therefore, the connector having a signal switching function will be required, for example, Taiwan Patent No. M326213 , M369534 , M390528 , and Taiwan Patent publication Publication No. 201121168A1 .
The document JP 3035547 B1 discloses a connector configured on a printed circuit board for a coaxial cable. The disclosed connector is highly modularized so the connector is easy to be attached to the printed circuit board with Surface Mount Technology or other equivalent techniques.
In another case, a pair of connectors similar to the grippers snap button is provided by the document US 6,030,240 A . It discloses a connector having relative simple structure.
These patents are requiring complex structures to implement in which the manufacturing processes are complicated and the costs would be increased. Therefore, it is tried to rectify those drawbacks and provide a connector that has more simpler structure with a logic control circuitry to easily achieve the signal switching. The present invention provides a connector in order to achieve the foresaid objective.
In accordance with one aspect of the present invention, a connector is provided according to the claim 1. Preferably, the shell conductor includes a screw portion, a first protrusion, a second protrusion and a bottom portion, wherein the screw portion is disposed on an outside of the shell conductor corresponding to the insulator, the first protrusion and the second protrusion form a guide groove in the containing space for containing the flexible conductor, the flexible conductor is pressed against the second protrusion, the bottom portion is grounded, and the first antenna further includes a screw structure for engaging with the screw portion so that the flexible conductor is compressed along a first direction.
Preferably, the connecting end and the controlling conductor have a distance therebetween, the insulator has a first portion and a second portion, the first portion is movably disposed in the containing space with the second portion, a geometric dimension of the second portion is smaller than that of the first portion, the flexible conductor is disposed on the second portion, and a length of the flexible conductor extending from the second portion is one of larger than or equal to the distance.
Preferably, the insulator extends along a second direction for connecting the controlling conductor, a part of the propping end is disposed around the second portion, the flexible conductor pushes the insulator along a third direction, and the first direction and the third direction have an angle therebetween equal to 180°.
Preferably, the first antenna has a signal feeding end, the signal conductor has a first end electrically connected to the signal feeding end and a second end electrically connected to a signal switch, the controlling conductor has a third end and a fourth end, wherein the third end is disposed on one side of the containing space near an upside of the first protrusion and extends below the connecting end along a fourth direction and the fourth end is disposed outside the shell conductor and is electrically connected to the control circuit.
Preferably, the signal switch is connected to the control circuit, a second antenna and an RF circuit, the control circuit further includes a pull-up circuit and an inverter, the pull-up circuit is electrically connected to the signal switch and the inverter in series, the connector is electrically connected to the control circuit and the signal switch is switched when the change of the potential occurs so that the first antenna is connected to the RF circuit when the first antenna is electrically connected to the connector through the signal conductor, and the connector is not electrically connected to the control circuit while the signal switch is switched so that the second antenna is connected to the RF circuit when the first antenna is not electrically connected to the connector.
Preferably, the signal switch includes a controlling signal end electrically connected to the control circuit, a first signal end electrically connected to the signal conductor, a second signal end electrically connected to the second antenna and a third signal end electrically connected to the RF circuit, the third signal end is electrically connected to the first signal end when the controlling conductor is electrically connected to the bottom portion, and the third signal end is electrically connected to the second signal end when the controlling conductor is not electrically connected to the bottom portion.
In accordance with the aforementioned of the present invention, a method for operating an antenna switch system according to claim 8 is disclosed. Preferably, the connector has a first and a second junctions and further comprises steps of: providing the first junction including the controlling conductor and a shell conductor, wherein the shell conductor is grounded, a containing space is formed in the shell conductor, and the controlling conductor is disposed on one side of the containing space; providing the second junction including an insulator disposed in the containing space, wherein there are respectively a signal conductor disposed within the insulator, and a flexible conductor disposed on the insulator and having an propping end and a connecting end, and the propping end is electrically connected to the shell conductor; electrically connecting the signal conductor to the first antenna, and the connecting end to the controlling conductor so that the control circuit has a change of potential and causes the first antenna to operate; providing a bottom portion of the shell conductor for grounding; providing a first protrusion and a second protrusion of the shell conductor to form a guide groove in the containing space for containing the flexible conductor; and engaging a screw portion of the shell conductor with a screw structure of the first antenna so that the flexible conductor is compressed along a first direction.
Preferably, the signal switching method further comprising steps of: provide a distance between the connecting end and the controlling conductor; and movably disposing a first portion of the insulator in the containing space with a second portion of the insulator having a geometric dimension smaller than that of the first portion.
Preferably, the signal switching method further comprising steps of: extending the connecting end along a second direction for connecting with the controlling conductor; and disposing a part of the propping end around the second portion.
Preferably, the signal switching method further comprising steps of: providing a first end of the signal conductor to be electrically connected to the signal feeding end of the first antenna; providing a second end of the signal conductor to be electrically connected to a signal switch; disposing a third end of the controlling conductor on one side of the containing space near an upside of the first protrusion; extending the third end below the connecting end along a fourth direction for electrically connecting to the connecting end; and disposing the fourth end of the controlling conductor outside the shell conductor to be electrically connected to the control circuit.
Preferably, the signal switching method further comprising steps of: providing the signal switch to be electrically connected to the control circuit, the second antenna and an RF circuit; switching the signal switch so that the first antenna is electrically connected to the RF circuit when the first antenna is electrically connected to the connector through the signal conductor; and switching the signal switch so that the second antenna (2a) is electrically connected to the RF circuit when the first antenna is not electrically connected to the connector.
Preferably, the signal switching method further comprising steps of: providing the signal switch including a controlling signal end electrically connected to the control circuit, a first signal end electrically connected to the signal conductor, a second signal end electrically connected to the second antenna and a third signal end electrically connected to the RF circuit; electrically connecting the third signal end to the first signal end when the controlling conductor is electrically connected to the bottom portion; and electrically connecting the third signal end to the second signal end when the controlling conductor is not electrically connected to the bottom portion.
In accordance with the aforementioned of the present invention, a wireless transmit/receive unit (WTRU) is provided. The wireless transmit/receive unit, having an RF circuit, comprising: a connector having a signal conductor, a bottom portion and a controlling conductor, wherein the signal conductor is electrically connected to a first antenna and the bottom portion is grounded; a signal switch having a first signal end, a second signal end and a third signal end, wherein the second signal end is electrically connected to a second antenna, the third signal end is electrically connected to the RF circuit and the first signal end is electrically connected to the signal conductor; and a control circuit electrically connected to the signal switch and the connector, wherein the third signal end is electrically connected to the first signal end when the controlling conductor is electrically connected to the bottom portion, and the third signal end is electrically connected to the second signal end when the controlling conductor is not electrically connected to the bottom portion.
The foregoing and other features and advantages of the present invention will be more clearly understood through the following descriptions with reference to the drawings, wherein:

Fig. 1 is a schematic diagram of the signal switching apparatus connected with an internal antenna according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the signal switching apparatus connected with an external antenna according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of the connector maintaining a floating status according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view of the connector connecting with the external antenna according to an embodiment of the present invention.

The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed.
Fig. 1 is a schematic diagram of the circuit of a signal switching apparatus 100 connected with an internal antenna 2a (a second antenna 2a) according to an embodiment of the present invention. As shown in Fig. 1, the signal switching apparatus 100 has not been connected with an external antenna yet. The signal switching apparatus 100 may be used for the switching different antenna circuits and includes the internal antenna 2a, a connector 10, a control circuit 30, a signal switch 40 and an RF circuit 60. The signal switching apparatus 100 may be intended for use in a wireless transmit/receive unit (WTRU).
The connector 10 has a contact 1 and a contact 2. The contact 1 is electrically connected to a contact 7 of the signal switch 40 through an antenna signal line 7s. The antenna signal line 7s is a coaxial cable, preferably. The contact 2 is grounded and may be electrically connected to a contact 3 of the control circuit 30 through a controlling conductor 31 (not shown), but the contact 2 is not electrically connected to the contact 3 in Fig. 1. The contact 2 and the contact 3 are maintaining a floating status.
The control circuit 30 has the contact 3, a contact 4, a contact 5, a pull-up circuit 33 and an inverter 32. The pull-up circuit 33 is electrically connected to the signal switch 40 through the contact 4 and is also electrically connected to the inverter 32 in series to be electrically connected to the contact 5 and the signal switch 40. As shown in Fig. 1, the contact 4 has a relatively high potential and the contact 5 has a relatively low potential. The control circuit 30 is electrically connected to the signal switch 40 through the contact 4 and the contact 5. The signal switch 40 may be a digital switch and has a contact 6, the contact 7 and a contact 8 for switching. The contact 6 is electrically connected to the RF circuit 60. The contact 8 is electrically connected to the internal antenna 2a.
Because the contact 4 has a relatively high potential and the contact 5 has a relatively low potential, a control signal generated by the control circuit 30 enables the signal switch 40 to be electrically connected to the contacts 6 and the contact 8 so that the internal antenna 2a is electrically connected to the RF circuit 60. The internal antennas 2a may operate to transmit and receive the RF signals.
Fig. 2 is a schematic diagram of the circuit of the signal switching apparatus 100 connected with the external antenna 1a (a first antenna 1a) according to an embodiment of the present invention. As shown in Fig. 2, the signal switching apparatus 100 has been connected with the external antenna 1a and disconnected with the internal antenna 2a. The contact 1 of the connector 10 is electrically connected to the external antenna 1a. The contact 2 and the contact 3 is electrically connected through the controlling conductor 31 (not shown). In this status, because the contact4 has a relatively low potential and the contact 5 has a relatively high potential, a control signal generated by the control circuit 30 changes and enables the signal switch 40 to be electrically connected to the contacts 6 and the contact 7 so that the external antenna 1a is electrically connected to the RF circuit 60. The external antenna 1a may operate to transmit and receive the RF signals.
The switching action according to the embodiment of the present invention is proceeded by the connector 10 and the signal switch 40. The signal switch 40 includes a controlling signal end 4 (the contact 4) electrically connected to the control circuit 30, a first signal end 7 (the contact 7) electrically connected to the signal conductor 15, a second signal end 8 (the contact 8) electrically connected to the second antenna 2a and a third signal end 6 (the contact 6) electrically connected to the RF circuit 60. The third signal end 6 is electrically connected to the first signal end 7 when the controlling conductor 3, 31 is electrically connected to the bottom portion 2, 20d, and the third signal end 6 is electrically connected to the second signal end 8 when the controlling conductor 3, 31 is not electrically connected to the bottom portion 2, 20d.
Fig. 3 is a cross-sectional view of the connector 10 maintaining a floating status according to an embodiment of the present invention. As shown in Fig. 3, a flexible conductor 17 is not shown in the cross-sectional view in order to be clearly represented. The connector 10 may be an RF switching connector or a coaxial connector for connecting to the external antenna 1a. The connector 10 has a shell conductor 20 forming a containing space 21 therein and grounded. A signal conductor 15, an insulator 16, the flexible conductor 17 and the controlling conductor 31 are disposed within the containing space 21. The shell conductor 20 and the controlling conductor 31 belong to a first junction of the connector 10. the signal conductor 15, the insulator 16 and the flexible conductor 17 belong to a second junction of the connector 10.
The shell conductor 20 includes a screw portion 20a, a first protrusion 20b, a second protrusion 20c and a bottom portion 20d. The screw portion 20a is a screw structure for engaging with the external antenna 1a and is disposed on an outside of the shell conductor 20 corresponding to the insulator 16. The external antenna 1a further includes a screw structure of a signal connector (not shown) for engaging with the screw portion 20a so that the flexible conductor 17 is compressed along a first direction D1. The second protrusion 20c is used for contacting the flexible conductor 17. The shell conductor 20 is grounded through the bottom portion 20d. When the connector 10 is electrically connected to the external antenna 1a, a grounding end (not shown) of the external antenna 1a may be grounded through the bottom portion 20d. The shell conductor 20 has an opening 22 and 23. The opening 22 is used for inserting the second junction. The opening 23 is used for the signal conductor 15 piercing through so that the signal conductor 15 is electrically connected to the signal switch 40 via the antenna signal line 7s.
The insulator 16 has a first portion (upper insulator) 16a and a second portion (lower insulator) 16b to disconnect the shell conductor 20 with the signal conductor 15. The first portion 16a is movably disposed in the containing space 21 with the second portion 16b. A geometric dimension of the second portion 16b is smaller than that of the first portion 16a. The flexible conductor 17 is disposed on the second portion 16b. When the connector 10 is electrically connected to the signal connector of the external antenna 1a, the signal connector is pushed along the first direction D1 (down side) to the first portion 16a so that the first portion 16a would be pushed along the first direction D1 by the external force from the opening 22. When the external antenna 1a is disconnected, the first portion 16a would be pushed and moved along the third direction D3 by the elastic force of the elastic conductor 17. The insulator 16 is disposed on the circumferential surface of the signal conductor 15, i.e. the insulator 16 is bracketing a part of the signal conductor 15.
The external antenna 1a has a signal feeding end (not shown). The signal conductor 15 has a first end 15a electrically connected to the signal feeding end and a second end 15b electrically connected to the signal switch 40.
The controlling conductor 31 has a third end 31a and a fourth end 31b. The third end 31a is disposed on one side of the containing space 21 near an upside of the first protrusion 20b and extends below the connecting end 17b along a fourth direction D4. The fourth end 31b is disposed outside the shell conductor 20 and is electrically connected to the control circuit 30. The elastic conductor 17 is made of conductive materials. The first protrusion 20b and the second protrusion 20c form a guide groove 21a in the containing space 21 for containing the flexible conductor 17. The guide groove 21a has the opening 23 for extending the second end 15b. Although the controlling conductor 31 and the shell conductor 20 are conductor and the controlling conductor 31 is penetrating the shell conductor 20, the controlling conductor 31 and the shell conductor 20 are not electrically connected to each other.
The flexible conductor 17 may be a spring preferably. The flexible conductor 17 is pressed against the second protrusion 20c in the first direction D1 and the insulator 16 in the third direction D3. The flexible conductor 17 disposed on the insulator 16 and having a propping end 17a and a connecting end 17b. The propping end 17a is electrically connected to the second protrusion 20c of the shell conductor 20. The connecting end 17b is disposed on the same side as the third end 31a of the controlling conductor 31 in the containing space 21 and extends along a second direction D2 to the location above the third end 31a. The connecting end 17b and the controlling conductor 31 have the distance d therebetween. When the connector 10 is not connected to the external antenna 1a, the controlling conductor 31 is floating from the connection end 17b and the second portion 16b doesn't contact to the second protrusion 20c. A length of the flexible conductor 17 extending from the second portion 16b is one of larger than or equal to the distance d.
Fig. 4 is a cross-sectional view of the connector 10 connecting with the external antenna 1a according to an embodiment of the present invention. As shown in Fig. 4, when the connector 10 is connected to the external antenna 1a, the screw structure of the external antenna 1a is engaged with the screw portion 20a so that the screw portion 20a of the connector 10 would be screwed into the screw structure and being fixed.
Then, the insulator 16 is pushed to the first direction D1 by the driving force due to the signal connector (i.e. the insulator 16 move down). At the same time, the flexible conductor 17 is compressed along the first direction D1 until the second portion 16b is pushed to the second protrusion 20c. Moreover, the connecting end 17b may also move along the first direction D1 and contact the third end 31a of the control conductor 31, thereby to change the floating state. Thus, since the shell conductor 20 is grounded via the bottom portion 20d and electrically connected to the control conductor 31 via the elastic conductor 17, the contact 2, the contact 3 and the contacts 4 have relatively low potentials and the contact 5 has a relatively high potential so that the potential of the control circuit 30 would be changed and may control the signal switch 40.
As shown in Fig. 3 and 4, the elastic conductor 17 is disposed outside of the second portion 16b, but the elastic conductor 17 may be disposed within the second portion 16b or disposed in any other way for combination as long as the elastic conductor 17 can complete the electrical connection with the control conductor 31 when the second junction is pressed down.
According to the embodiment of the present invention, the elastic conductor 17 may be grounded and connected to the controlling conductor 31 so as to change the potential of the control circuit 30 when the connector 10 is electrically connected to the external antenna 1a. The elastic conductor 17 may make the second junction restore to the original position when the connector 10 is not electrically connected to the external antenna 1a. That is, when the insulator 16 doesn't move, the third end 31a and the connecting end 17b keep the distance d therebetween. When the insulator 16 moves to the propping end 17a about the distance d, the third end 31a and the connecting end 17b are electrically connected.
The third signal end 6 is electrically connected to the first signal end 7 when the controlling conductor 3, 31 is electrically connected to the bottom portion 2, 20d, and the third signal end 6 is electrically connected to the second signal end 8 when the controlling conductor 3, 31 is not electrically connected to the bottom portion 2, 20d.
According to the embodiment of the present invention, A signal switching method may be provided and intended for use in the signal switching apparatus 100 or the wireless transmit/receive unit (WTRU). The signal switching method for operating a connector 10 to switch signals between a first antenna 1a and a second antenna 2a by a controlling conductor 31 and an RF circuit 60 and the controlling conductor 31 is connected to the RF circuit 60 through a control circuit 30, characterized by comprising steps of: when connecting the connector 10 with the first antenna 1a, the controlling conductor 31 is grounded and connecting the first antenna 1a and the RF circuit 60; and when the controlling conductor 31 is not grounded, connecting the second antenna 2a and the RF circuit 60.
According to the embodiment of the present invention, the signal switching apparatus 100 may switch the antenna signal via the control circuit 30 and the signal switch 40, but may also be performed by other conventional switching circuit to switch the signals of different antennas as long as switching by the potential change mechanism. Furthermore, as shown in Fig. 3 and 4, although the first direction D1 and the second direction D2, the second direction D2 and the third direction D3, the third direction D3 and the fourth direction D4, the fourth direction D4 and the first direction D1 are respectively perpendicular, the second direction D2 and the fourth direction D4 may not perpendicular to the first direction D1 and the third direction D3, as long as the connection between the control conductor 31 the flexible conductor 17 would not be hindered when the second junction is pressed down. For example, the first direction D1 may be represented a direction that the flexible conductor 17 is compressed to the second protrusion 20c. An angle between the first direction D1 and the second direction D2 may be less than 180°, preferably, but an angle between the first direction D1 and the third direction D3 may be 180°, preferably.

Claims

A connector (10), comprising:
- a first junction including
a) a shell conductor (20) forming a containing space (21) therein and grounded;

b) a control circuit (30) triggered when grounded; and

c) a controlling conductor (31) disposed on one side of the containing space (21), electrically insulated from the shell conductor (20), and electrically connected to the control circuit (30); and

- a second junction including
a) an insulator (16) movably disposed in the containing space (21);

b) a signal conductor (15) disposed within the insulator (16); and

c) a flexible conductor (17) disposed on the insulator (16) and having a propping end (17a) contacting the shell conductor (20) and a connecting end (17b) separated from the controlling conductor (31) by a distance (d),
wherein the insulator (16) is movable to push the connecting end (17b) toward the controlling conductor (31) by the distance (d), such that the connecting end (17b) contacts the controlling conductor (31) so that the control circuit (30) is grounded through the controlling conductor (31), the flexible conductor (17) and the shell conductor (20).
The connector (10) according to claim 1, characterized in that the shell conductor (20) includes a screw portion (20a), a first protrusion (20b), a second protrusion (20c) and a bottom portion (20d), wherein the screw portion (20a) is disposed on an outside of the shell conductor (20) corresponding to the insulator (16), the first protrusion (20b) and the second protrusion (20c) form a guide groove (21a) in the containing space (21) for containing the flexible conductor (17), the flexible conductor (17) is pressed against the second protrusion (20c), the bottom portion (20d) is grounded, and the first antenna (1a) further includes a screw structure for engaging with the screw portion (20a) so that the flexible conductor (17) is compressed along a first direction (D1).
The connector (10) according to claim 1 or 2, characterized in that the connecting end (17b) and the controlling conductor (31) have the distance (d) therebetween, the insulator (16) has a first portion (16a) and a second portion (16b), the first portion (16a) is movably disposed in the containing space (21) with the second portion (16b), a geometric dimension of the second portion (16b) is smaller than that of the first portion (16a), the flexible conductor (17) is disposed on the second portion (16b), and a length of the flexible conductor (17) extending from the second portion (16b) is one of larger than or equal to the distance (d).
The connector (10) according to any one of claims 1-3, characterized in that the insulator (16) extends along a second direction (D2) for connecting the controlling conductor (31), a part of the propping end (17a) is disposed around the second portion (16b), the flexible conductor (17) pushes the insulator (16) along a third direction (D3), and the first direction (D1) and the third direction (D3) have an angle therebetween equal to 180°.
The connector (10) according to any one of claims 1-4, characterized in that the first antenna (1a) has a signal feeding end, the signal conductor (15) has a first end (15a) electrically connected to the signal feeding end and a second end (15b) electrically connected to a signal switch (40), the controlling conductor (31) has a third end (31a) and a fourth end (31b), wherein the third end (31a) is disposed on one side of the containing space (21) near an upside of the first protrusion (20b) and extends below the connecting end (17b) along a fourth direction (D4) and the fourth end (31b) is disposed outside the shell conductor (20) and is electrically connected to the control circuit (30).
The connector (10) according to any one of claims 1-5, characterized in that the signal switch (40) is connected to the control circuit (30), a second antenna (2a) and an RF circuit (60), the control circuit (30) further includes a pull-up circuit (33) and an inverter (32), the pull-up circuit (33) is electrically connected to the signal switch (40) and the inverter (32) in series, the connector (10) is electrically connected to the control circuit (30) and the signal switch (40) is switched when the change of the potential occurs so that the first antenna (1a) is connected to the RF circuit (60) when the first antenna (1a) is electrically connected to the connector (10) through the signal conductor (15), and the connector (10) is not electrically connected to the control circuit (30) while the signal switch (40) is switched so that the second antenna (2a) is connected to the RF circuit (60) when the first antenna (1a) is not electrically connected to the connector (10).
The connector (10) according to any one of claims 1-5, characterized in that the signal switch (40) includes a controlling signal end (4) electrically connected to the control circuit (30), a first signal end (7) electrically connected to the signal conductor (15), a second signal end (8) electrically connected to the second antenna (2a) and a third signal end (6) electrically connected to the RF circuit (60), the third signal end (6) is electrically connected to the first signal end (7) when the controlling conductor (3, 31) is electrically connected to the bottom portion (2, 20d), and the third signal end (6) is electrically connected to the second signal end (8) when the controlling conductor (3, 31) is not electrically connected to the bottom portion (2, 20d).
A method for operating an antenna switch system, wherein the antenna switch system comprises a first antenna (1a), an RF circuit (60), a signal switch (40) electrically connected to the RF circuit (60), a second antenna (2a) electrically connected to the signal switch (40), and a connector (10) as claimed in one of the claims 1 to 7, wherein the connector (10), a control circuit (30) and a signal conductor (15) are electrically connected to the signal switch (40), , the method comprising the steps of:
- when the first antenna (1a) is inserted into the connector (10) grounding the controlling conductor (31) electrically connecting the first antenna (1a) and the RF circuit (60), and electrically disconnecting the second antenna (2a) and the RF circuit (60); and

- when the controlling conductor (31) is not grounded, electrically connecting the second antenna (2a) and the RF circuit (60).
The method according to claim 8, further comprising steps of:
- when the controlling conductor (31) is not grounded, electrically connecting the second antenna (2a) and the RF circuit (60) through the signal switch (40); and

- when the first antenna (1a) is inserted into the connector (10), grounding the controlling conductor (31) through the shell conductor (20) of the connector (10), electrically connecting the first antenna (1a) and the RF circuit (60) through the signal conductor (15) and the signal switch (40), and electrically disconnecting the second antenna (2a) and the RF circuit (60) through the signal switch (40).
The method according to claim 8 or 9, characterized by further comprising steps of:
- when the first antenna (1a) is inserted into the connector (10), pushing the insulator (16) toward the flexible conductor (17) by the first antenna (1a);

- compressing the flexible conductor (17) by the insulator (16) till the connecting end (17b) is electrically connected to the controlling conductor (31); and

- grounding the control circuit (30) through the controlling conductor (31) electrically connected to the connecting end (17b).
The method according to any one of claims 8-10, characterized by further comprising steps of:
- when the control circuit (30) is grounded, electrically connecting the first antenna (1a) and the RF circuit (60), and electrically disconnecting the second antenna (2a) and the RF circuit (60) through the signal switch (40).
The method according to any one of claims 8-11, characterized by further comprising steps of:
- providing a first and a second potential signals to the signal switch (40) from the control circuit (30); and

- switchaing the signal switch (40) according to the first and the second potential signals.
The method according to any one of claims 8-12, characterized in that
- the first potential signal is provided from a pull-up circuit (33) included in the control circuit (30); and

- the second potential signal is provided from an inverter (32) included in the control circuit (30).
The method according to any one of claims 8-12, characterized by further comprising steps of:
- when the signal switch (40) is provided with the first potential signal in high and the second potential signal in low, switching the signal switch (40) to form a second electrically connection between the second antenna (2a) and the RF circuit (60); and

- when the signal switch (40) is provided with the first potential signal in low and the second potential signal in high, switching the signal switch (40) to form a first electrical connection between the first antenna (1a) and the RF circuit (60).