CN203340066U - Antenna unit with high-frequency switch - Google Patents
Antenna unit with high-frequency switch Download PDFInfo
- Publication number
- CN203340066U CN203340066U CN2013204335537U CN201320433553U CN203340066U CN 203340066 U CN203340066 U CN 203340066U CN 2013204335537 U CN2013204335537 U CN 2013204335537U CN 201320433553 U CN201320433553 U CN 201320433553U CN 203340066 U CN203340066 U CN 203340066U
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- diode
- switch
- terminal
- antenna
- filter
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Abstract
The utility model relates to an antenna unit with a high-frequency switch, which comprises a high-frequency switch, an LC filter, an antenna terminal, a transmitting-side input terminal and a receiving-side output terminal, wherein the high-frequency switch comprises a first diode and a second diode, and the first diode is connected between the antenna terminal and the LC filter in series; the LC filter is connected between the first diode and the transmitting-side input terminal; and one end of the second diode is connected to a receiving-side signal path between the antenna terminal and the receiving-side output terminal in parallel, and the other end of the second diode is connected to a power input terminal. The high-frequency switch further comprises a resistor, wherein one end of the resistor is connected between the first diode and the second diode through a first capacitor, and the other end of the resistor is grounded. The antenna unit with the high-frequency switch shortens the switching time between a transmitting mode and a receiving mode of the antenna unit, and can suppress the loss in transmitting and receiving signals.
Description
Technical field
The utility model relates to field of antenna, particularly relates to a kind of antenna element with HF switch.
Background technology
As shown in Figure 1, the HF switch of prior art generally has: and the 1st diode D11 that is connected in series of the signal path between antenna terminal ANT and transmitter side input terminal Tx and and antenna terminal ANT and receiver side lead-out terminal Rx between the 2nd diode D12 that is connected in parallel of signal path, and the optionally signal path between switched antenna terminal ANT and transmitter side input terminal Tx and the signal path between antenna terminal ANT and receiver side input terminal Tx.
But, even diode is optional from same manufacture batch, the deviation of also can produce ± 10% left and right of magnitude of the stored charge.Because there is following problem in this point:, in above-mentioned HF switch, exist 1 delay of μ more than second the switching time from the sending mode to the receiving mode.
Under the state of sending mode, the 1st and the 2nd diode D11, D12 be in conducting state, and in the 1st diode D11 stored charge Q1, stored charge Q2 in the 2nd diode D12.Then, if, in order from sending mode, to be switched to receiving mode, be 0V and make power input terminal Vc, between the 1st and the 2nd diode D11, D12, discharge mutually stored charge.At this moment, if Q1 > Q2, the 2nd diode D12 comparatively fast becomes cut-off state, and the 1st diode D11 stored charge Q1 needs some times of cost to being released to 0, than the 2nd diode D12, becomes for a long time late cut-off state.Therefore, in above-mentioned HF switch, exist following problem: from sending mode, be switched to delay switching time of receiving mode, powerful transmitted signal is roundabout in the receiver side signal path.
Summary of the invention
The deficiency existed for prior art, the utility model proposes the antenna element with HF switch, and this HF switch can shorten the switching time that is switched to receiving mode from sending mode.
The technical scheme the utility model proposes is as follows:
A kind of antenna element with HF switch, comprise HF switch, the LC filter, antenna terminal, transmitter side input terminal and receiver side lead-out terminal, described HF switch comprises the 1st diode and the 2nd diode, described the 1st diode is connected between described antenna terminal and described LC filter, described LC filter is connected between described the 1st diode and described transmitter side input terminal, one end of described the 2nd diode is parallel-connected to the receiver side signal path between described antenna terminal and described receiver side lead-out terminal, the other end of described the 2nd diode is connected to power input terminal, described HF switch also comprises resistance, and an end of described resistance is connected between described the 1st diode and described the 2nd diode by the first capacitor, the other end ground connection of described resistance.
Preferably, described the 2nd diode is by the second capacitor grounding.
Preferably, described HF switch also comprises inductor, and an end of described inductor is connected between described the 1st diode and LC filter, the other end ground connection of described inductor.
The beneficial effects of the utility model are: exist the resistance be connected in parallel between the 1st and the 2nd diode be connected in series, so the charge discharge that power supply terminal switches to while disconnecting accelerates, shorten the switching time from sending mode to receiving mode; In addition, because the other end of the diode be connected in parallel with the receiver side lead-out terminal is connected on power input, simultaneously by capacitor grounding, therefore can suppresses transmitted signal and receive the loss of signal.
The accompanying drawing explanation
Fig. 1 is the circuit diagram of the HF switch of prior art;
Fig. 2 is the circuit diagram with antenna element of HF switch of the present utility model;
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further details.
Fig. 2 is the circuit diagram with antenna element of HF switch of the present utility model, the antenna element with HF switch as shown in Figure 2 comprises HF switch 11, LC filter 12, antenna terminal ANT, transmitter side input terminal Tx and receiver side lead-out terminal Rx, described HF switch 11 comprises the 1st diode D1 and the 2nd diode D2, described the 1st diode D1 is connected between described antenna terminal ANT and described LC filter 12, described LC filter 12 is connected between described the 1st diode D1 and described transmitter side input terminal Tx, the end of described the 2nd diode D2 is parallel-connected to the receiver side signal path between described antenna terminal ANT and described receiver side lead-out terminal Rx, the other end of described the 2nd diode D2 is connected to power input terminal Vc, described HF switch 11 also comprises resistance R, and an end of described resistance R is connected between described the 1st diode D1 and described the 2nd diode D2 by the first capacitor C1, the other end ground connection of described resistance R.
Preferably, described the 2nd diode D2 is by the second capacitor C2 ground connection.
Preferably, described HF switch 11 also comprises inductor SL1, and the end of described inductor SL1 is connected between described the 1st diode D1 and LC filter 12, the other end ground connection of described inductor SL1.
Next the work of above-mentioned antenna element is described: at first, in the situation that transmitted signal is sent (sending mode), by power input terminal Vc is added to for example 2.5V, and make the 1st diode D1 and the 2nd diode D2 be conducting state, from the transmitted signal of transmitter side input terminal Tx input, pass through LC filter 12, HF switch 11, then send from antenna terminal ANT.
Otherwise, in situation about being received to received signal (receiving mode), by power input terminal Vc is added to for example 0V, and make the 1st diode D1 and the 2nd diode D2 be cut-off state, electric capacity and inductor SL1 during by the 1st diode D1 cut-off form high pass filter, in frequency acceptance band, owing to becoming high impedance, and it is not roundabout to transmitter side input terminal Tx to make to receive signal, from the reception signal of antenna terminal ANT input, to receiver side lead-out terminal Rx, exports.
The action of the switching from sending mode to receiving mode is described here.When being sending mode, the 1st diode D1 and the 2nd diode D2 are conducting state.At this moment, establishing the electric charge of storing in the 1st diode D1 is Q1, and the electric charge of storing in the 2nd diode D2 is Q2.In this state, if in order from sending mode, to be switched to receiving mode, and power input terminal Vc is added to 0V, because connect the resistance R of ground connection between the 1st diode D1 be connected in series and the 2nd diode D2, so the charge Q 1 of storing during conducting, Q2 directly electric discharge by resistance R, thereby shorten the time of switching from sending mode to receiving mode.
Usually, although the 1st and the 2nd diode D1, D2 are used the product mix of identical manufacture batch, magnitude of the stored charge Q1, Q2 exist deviation.Particularly, if the magnitude of the stored charge Q1 of the 1st diode D1 is large, switching time slack-off, but adopt the utility model can eliminate such unfavorable condition.
Finally it should be noted that above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment, the utility model is had been described in detail; those of ordinary skill in the field are to be understood that; still can modify or the part technical characterictic is equal to and replaces and do not break away from the spirit of technical solutions of the utility model embodiment of the present utility model, it all should be contained in the middle of the technical scheme scope that the utility model asks for protection.
Claims (3)
1. the antenna element with HF switch, comprise HF switch, the LC filter, antenna terminal, transmitter side input terminal and receiver side lead-out terminal, described HF switch comprises the 1st diode and the 2nd diode, described the 1st diode is connected between described antenna terminal and described LC filter, described LC filter is connected between described the 1st diode and described transmitter side input terminal, one end of described the 2nd diode is parallel-connected to the receiver side signal path between described antenna terminal and described receiver side lead-out terminal, the other end of described the 2nd diode is connected to power input terminal, described HF switch also comprises resistance, and an end of described resistance is connected between described the 1st diode and described the 2nd diode by the first capacitor, the other end ground connection of described resistance.
2. the antenna element with HF switch as claimed in claim 1, wherein, described the 2nd diode is by the second capacitor grounding.
3. the antenna element with HF switch as claimed in claim 1 or 2, wherein, described HF switch also comprises inductor, an end of described inductor is connected between described the 1st diode and LC filter, the other end ground connection of described inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204335537U CN203340066U (en) | 2013-07-20 | 2013-07-20 | Antenna unit with high-frequency switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204335537U CN203340066U (en) | 2013-07-20 | 2013-07-20 | Antenna unit with high-frequency switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203340066U true CN203340066U (en) | 2013-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204335537U Expired - Fee Related CN203340066U (en) | 2013-07-20 | 2013-07-20 | Antenna unit with high-frequency switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203340066U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113557671A (en) * | 2019-03-13 | 2021-10-26 | 株式会社村田制作所 | Multiplexer, high-frequency module and communication device |
-
2013
- 2013-07-20 CN CN2013204335537U patent/CN203340066U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113557671A (en) * | 2019-03-13 | 2021-10-26 | 株式会社村田制作所 | Multiplexer, high-frequency module and communication device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20140720 |
|
| EXPY | Termination of patent right or utility model |