TWI476803B - Wireless communication device - Google Patents

Description

Wireless communication device

The invention relates to a switch, in particular to a three-pole three-throw (3P3T) switch and a wireless communication device.

As more and more frequency bands are covered by wireless communication devices, it is often necessary to establish three or more transmission and reception paths in the communication device to meet the transmission and reception requirements of signals in different frequency bands. In the current design, a single-pole double-throw (SPDT) switch and a double-pole double-throw (DPDT) switch are often combined to form a three-pole, three-throw function. However, such a combination is not only costly but also wastes space.

Therefore, how to design a three-pole three-throw switch with a small size has become a new topic in the design of communication devices.

In view of this, it is necessary to provide a three-pole three-throw switch, which has a small size and can effectively save costs.

In addition, there is a need for a wireless communication device that can be smaller in size and cost effective with a smaller three-pole, three-throw switch.

The three-pole three-throw switch in the embodiment of the present invention includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth two in the same direction. a pole body in which a cathode of the first diode and a cathode of the second diode are common The node forms a first common end, and receives the first control signal by the first inductor; the cathode of the second diode and the common node of the anode of the third diode form a first throwing end, and Receiving, by the second inductor, the second control signal; the cathode of the third diode and the common node of the anode of the fourth diode form a second common end, and receiving the third control signal by the third inductor; a common junction of the cathode of the fourth diode and the anode of the fifth diode forms a second throwing end, and receives the first control signal by the fourth inductor; the cathode of the fifth diode and the a common junction of the anode of the sixth diode forms a third common end, and receives the second control signal by a fifth inductor; a common junction of the cathode of the sixth diode and the anode of the first diode The dot forms a third throwing end and receives the third control signal by the sixth inductor.

Preferably, the first inductor is further grounded by the first capacitor to filter the first control signal, and the second inductor is also grounded by the second capacitor to filter the second control signal, and the third inductor is further filtered by the third The capacitor is grounded to filter the third control signal.

The wireless communication device in the embodiment of the present invention includes the above-mentioned three-pole three-throw switch, an antenna group and a transceiver module. The antenna group includes three antennas respectively connected to the first throwing end, the second throwing end and the third throwing end. The transceiver module includes three transceiver submodules respectively connected to the first common end, the second common end and the third common end, and three control submodules respectively connected to the first capacitor and the first The fourth inductor, the second capacitor and the fifth inductor, and the third capacitor and the sixth inductor are configured to control the three-pole-three-throw switch by transmitting a control signal to transmit and receive the plurality of antennas and the plurality of antennas The transmission and reception path of the signal is selected between the sub-modules.

20‧‧‧Three-pole three-throw switch

P1, P2, P3‧‧‧ public end

T1, T2, T3‧‧‧ throwing end

D1, D2, D3, D4, D5, D6‧‧‧ diodes

L1, L2, L3, L4, L5, L6‧‧‧ inductance

C1, C2, C3‧‧‧ capacitors

S1, S2, S3‧‧‧ control signals

10‧‧‧Antenna group

12‧‧‧Antenna

30‧‧‧ transceiver module

31‧‧‧Control submodule

32‧‧‧ transceiver module

40‧‧‧Single pole double throw switch

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a circuit diagram of an embodiment of a three-pole, three-throw switch of the present invention.

2 is a block diagram of an embodiment of a wireless communication device of the present invention.

3 is a block diagram of another embodiment of a wireless communication device of the present invention.

Referring to FIG. 1, a circuit diagram of an embodiment of a three-pole three-throw (3P3T) switch 20 in accordance with the present invention is shown.

In the present embodiment, the three-pole three-throw switch 20 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, and a fifth diode in the same direction. D5 and sixth diode D6.

In detail, the common junction of the cathode of the first diode D1 and the anode of the second diode D2 forms the first common terminal P1, the cathode of the second diode D2 and the anode of the third diode D3. The common node forms a first throw terminal T1, the common node of the cathode of the third diode D3 and the anode of the fourth diode D4 forms a second common terminal P2, and the cathode and the fourth diode D4 The common node of the anode of the fifth diode D5 forms a second throwing end T2, and the common node of the cathode of the fifth diode D5 and the anode of the sixth diode D6 forms a third common end P3, the sixth two The common junction of the cathode of the pole body D6 and the anode of the first diode D1 forms a third throwing end T3.

In the present embodiment, the three-pole three-throw switch 20 further includes a first inductor L1, a second inductor L2, a third inductor L3, and a fourth inductor L4 that are sequentially connected to a common node between the six diodes D1 to D6. The fifth inductor L5 and the inductor L6. In the present embodiment, the inductors L1 to L6 can simultaneously block the AC signals received from the diodes D1 to D6 by the high level control signal.

In detail, the common node of the cathode of the first diode D1 and the anode of the second diode D2 receives the first control signal S1 by the first inductor L1, and the cathode and the third of the second diode D2. The common node of the anode of the diode D3 receives the second control signal through the second inductor L2 No. S2, the common junction of the cathode of the third diode D3 and the anode of the fourth diode D4 receives the third control signal S3 by the third inductor L3, and the cathode and the fifth pole of the fourth diode D4 The common node of the anode of the body D5 receives the first control signal S1 by the fourth inductor L4, and the common node of the cathode of the fifth diode D5 and the anode of the sixth diode D6 is received by the fifth inductor L5. The second control signal S2, the common junction of the cathode of the sixth diode D6 and the anode of the first diode D1 receives the third control signal S3 via the sixth inductor L6.

In the present embodiment, the three-pole-three-throw switch 20 further includes a first capacitor C1, a second capacitor C2, and a third capacitor C3 for grounding the AC signal that the inductors L1 to L3 may leak, and can slow down the switching time.

In detail, the first inductor L1 is grounded by the first capacitor C1 to filter the first control signal S1, and the second inductor L2 is grounded by the second capacitor C2 to filter the second control signal S2, and the third inductor L3 is borrowed. The third capacitor C3 is grounded to filter the third control signal S3.

In other embodiments, adding a circuit such as a capacitor or an inductor to correct the path of the tripod switch 20 is within the scope of the present invention.

Please refer to Table 1, which shows a control signal truth value table of an embodiment of the three-pole three-throw switch 20 of the present invention.

Table 1. Control signal truth table

In this embodiment, the first control signal S1, the second control signal S2, and the third control signal S3 have only one end at a high level, and the other two ends are at a low level.

When the first control signal S1 is at a high level, the second diode D2 and the fifth diode D5 are turned on. At this time, the first common terminal P1 is connected to the first throwing terminal T1, and the third common terminal P3 is connected to the second throwing terminal T2.

When the second control signal S2 is at a high level, the third diode D3 and the sixth diode D6 are turned on. At this time, the second common terminal P2 is connected to the first throwing terminal T1, and the third common terminal P3 is connected to the third throwing terminal T3.

When the third control signal S3 is at a high level, the fourth diode D3 and the first diode D1 are turned on. At this time, the first common terminal P1 is connected to the third throwing terminal T3, and the second common terminal P2 is connected to the second throwing terminal T2.

In the present embodiment, the three-pole three-throw switch 20 realizes three-pole and three-throw functions by six diodes D1 to D6, so that the size of the product is smaller, and the cost is effectively saved. It also simplifies the logic of the control signals S1~S3.

Referring to FIG. 2, a block diagram of an embodiment of a wireless communication device 100 of the present invention is shown. In the present embodiment, the wireless communication device 100 includes an antenna group 10, a three-pole three-throw switch 20, and a transceiver module 30.

In the present embodiment, the antenna group 10 includes three antennas 12 connected to the first throwing end T1, the second throwing end T2 and the third throwing end T3, respectively. In the present embodiment, the three antennas 12 of the antenna group 10 are multi-frequency or wide-band antennas, so that the antenna group 10 can cover three frequency bands. Taking a wideband antenna as an example, the antenna group 10 needs to cover WIFI in the 2.3 GHz band, LTE in 2.3 GHz, and WiMAX in 2.5 GHz. In other embodiments, the antenna group 10 can also cover three other frequency bands that are not adjacent.

The transceiver module 30 includes three control sub-modules 31 and three transceiver sub-modules 32. The three control sub-modules 31 are respectively connected to the first capacitor C1 and the fourth inductor L4, the second capacitor C2 and the fifth inductor L5, and the third capacitor C3 and the sixth inductor L6 for outputting a high level and a low level. The control signals S1 to S3 are used to control the three-pole-three-throw switch switch 20 to select a transmission path of the signal between the plurality of antennas 10 and the plurality of transceiver sub-modules 30. In the present embodiment, the high level is 1 and the low level is 0. The three transceiver sub-modules 32 are respectively connected to the common ends P1 P P3 of the three-pole three-throw switch 20 for switching between the plurality of antennas 12 and the plurality of transceiver sub-modules 32 by the three-pole three-throw switch 20 Signal transmission and reception path. In the embodiment, the wireless communication device 100 realizes the function of three-pole and three-throw by the six diodes D1 to D6, so that the size of the product is smaller, the cost is effectively saved, and the control signal S1 is simplified. The logic of S3.

Referring to FIG. 3, a block diagram of another embodiment of a wireless communication device 100 of the present invention is shown. 3 is divided into a receiving sub-module 321 and a transmitting sub-module 322 on the basis of FIG. 2, and three single-pole double-throw switches 40 are added. Single pole double throw switch 40 The common ends are respectively connected to the three common terminals P1 P P3 of the three-pole three-throw switch 20, and the first throwing position and the second throwing position are respectively connected to the receiving sub-module 321 and the transmitting sub-module 322 of the transceiver module 30, The reception of the signal in Figure 2 is separated from the path of transmission.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

20‧‧‧Three-pole three-throw switch

P1, P2, P3‧‧‧ public end

T1, T2, T3‧‧‧ throwing end

D1, D2, D3, D4, D5, D6‧‧‧ diodes

L1, L2, L3, L4, L5, L6‧‧‧ inductance

C1, C2, C3‧‧‧ capacitors

S1, S2, S3‧‧‧ control signals

Claims (1)

A wireless communication device includes: a three-pole three-throw switch, including a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth in the same direction a diode, wherein a common junction of a cathode of the first diode and an anode of the second diode forms a first common end, and receives a first control signal by a first inductor; the second diode a common junction of the cathode of the body and the anode of the third diode forms a first throwing end, and receives a second control signal by the second inductor; a cathode of the third diode and the fourth diode a common node of the anode forms a second common end, and receives a third control signal by a third inductor; a cathode of the fourth diode and a common node of the anode of the fifth diode form a second throw Receiving, by the fourth inductor, the first control signal; the cathode of the fifth diode and the common node of the anode of the sixth diode form a third common end, and receiving the fifth inductor a second control signal; a cathode of the sixth diode and a common junction of the anode of the first diode The third control terminal receives the third control signal by the sixth inductor; the first inductor is also grounded by the first capacitor to filter the first control signal, and the second inductor is also grounded by the second capacitor. The second control signal is filtered, the third inductor is also grounded by the third capacitor to filter the third control signal; the antenna group includes three antennas respectively connected to the first throwing end and the second throwing end. The third throwing end; and the transceiver module includes three transceiver submodules respectively connected to the first common end, the second common end and the third common end, and three control submodules respectively connected The first capacitor and the fourth inductor, the second capacitor and the fifth inductor, and the third capacitor and the sixth inductor are used to control the three-pole-three-throw switch by transmitting a control signal to The transmission and reception paths of the signals are selected between the plurality of antennas and the plurality of transceiver submodules.