CN219740365U - Radio frequency structure based on DPDT receiving circuit - Google Patents
Radio frequency structure based on DPDT receiving circuit Download PDFInfo
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- CN219740365U CN219740365U CN202320110133.9U CN202320110133U CN219740365U CN 219740365 U CN219740365 U CN 219740365U CN 202320110133 U CN202320110133 U CN 202320110133U CN 219740365 U CN219740365 U CN 219740365U
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- radio frequency
- filter
- dpdt
- chip
- receiving circuit
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- ZCJJIQHVZCFSGZ-UHFFFAOYSA-N 2,8-bis(diphenylphosphoryl)dibenzothiophene Chemical compound C=1C=CC=CC=1P(C=1C=C2C3=CC(=CC=C3SC2=CC=1)P(=O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 ZCJJIQHVZCFSGZ-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The utility model discloses a radio frequency structure based on a DPDT receiving circuit, comprising: the antenna is connected with the first filter and the second filter, the first filter and the second filter are connected with the DPDT switch, and the DPDT switch is connected with the first radio frequency chip and the second radio frequency chip. The beneficial effects of the utility model are as follows: the number of the receiving ports of the radio frequency chip can be reduced.
Description
Technical Field
The utility model relates to the technical field of radio frequency structures, in particular to a radio frequency structure based on a DPDT receiving circuit.
Background
Currently, since the rf chips of the 4G and 5G are independent, on some frequency bands shared by the 4G and 5G, a Single Pole Double Throw (SPDT) switch is required to be used for the reception path to realize the transmission of the reception signal to the 4G rf chip and the 5G rf chip, respectively.
In the prior art, as shown in fig. 2, two SPDT switches are required, the PCB has four radio frequency traces, the 4G radio frequency chip occupies two low frequency input ports, and the 5G radio frequency chip occupies two low frequency input ports. The problem that the receiving port of the radio frequency chip occupies more is solved.
Disclosure of Invention
Aiming at the defect that a plurality of receiving ports of a radio frequency chip occupy in the prior art, the utility model provides a radio frequency structure based on a DPDT receiving circuit, which can reduce the number of the receiving ports of the radio frequency chip.
The following is a technical scheme of the utility model, a radio frequency structure based on a DPDT receiving circuit, comprising: the antenna is connected with the first filter and the second filter, the first filter and the second filter are connected with the DPDT switch, and the DPDT switch is connected with the first radio frequency chip and the second radio frequency chip.
Preferably, the first filter receives signals in the 5GN8 band and the LTEB8 band.
Preferably, the second filter is used to receive signals in the 5GN5 band and the LTEB5 band.
Preferably, the first radio frequency chip is a 4G radio frequency chip.
Preferably, the second radio frequency chip is a 5G radio frequency chip.
Preferably, the signal in the N8 frequency band received by the first filter and the signal in the N5 frequency band received by the second filter are transmitted to the 5g_rx_l1 port of the second radio frequency chip through the first radio frequency line.
Preferably, the signal in the LTEB8 band received by the first filter and the signal in the LTEB5 band received by the second filter are transmitted to the 4g_rx_l1 port of the first radio frequency chip through the second radio frequency line.
Preferably, the DPDT switch has an area of 1.65mm 2 。
The beneficial effects of the utility model are as follows: on the basis of meeting the four frequency band receiving functions, 2 radio frequency chip receiving ports are saved for other frequency bands; the layout area of the PCB device is saved; the wiring difficulty of the PCB for receiving the radio frequency wires is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a radio frequency structure based on a DPDT receiving circuit.
Fig. 2 is a schematic structural diagram of a prior art radio frequency structure.
In the figure 1: an antenna; 2: a first filter; 3: a second filter; 4: a DPDT switch; 5: a first radio frequency chip; 6: and a second radio frequency chip.
Detailed Description
The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.
Examples: as shown in fig. 1, a radio frequency structure based on a DPDT receiving circuit includes:
the antenna 1, the antenna 1 connects first filter 2 and second filter 3, and two pole double throw (DPDT) switches are connected to first filter 2 and second filter 3, and two pole double throw switches connect first radio frequency chip 5 and second radio frequency chip 6.
The first filter 2 is used to receive signals in the 5GN8 band and the LTEB8 band.
The second filter 3 is used to receive signals in the 5GN5 band and the LTEB5 band.
The first radio frequency chip 5 is a 4G radio frequency chip and is used for receiving signals of an LTEB5 frequency band and an LTEB8 frequency band.
The second rf chip 6 is a 5G rf chip, and is configured to receive signals in the 5GN5 frequency band and the 5GN8 frequency band.
One side of a DPDT switch 4 is connected with a first filter 2 and a second filter 3, the other side of the DPDT switch is connected with a first radio frequency chip 5 and a second radio frequency chip 6, signals are received by the first filter 2 and the second filter 3 through changing the passage of the DPDT switch 4, signals received by a 5GN5 frequency band and a 5GN8 frequency band are switched through the DPDT switch 4 and enter a 5G radio frequency chip 5G_RX_L1 port, and signals received by an LTEB5 frequency band and an LTEB8 frequency band enter a 4G radio frequency chip 4G_RX_L1 port.
The signal is received by the first filter 2 and the second filter 3 through the antenna 1, wherein the first filter 2 is used for receiving signals of 5GN8 frequency band and LTEB8 frequency band, the second filter 3 is used for receiving signals of 5GN5 frequency band and LTEB5 frequency band, the signals are switched through the DPDT switch 4, the signal of N8 frequency band received by the first filter 2 and the signal of N5 frequency band received by the second filter 3 are transmitted to the 5g_rx_l1 port of the second radio frequency chip 6, and the signal of LTEB8 frequency band received by the first filter 2 and the signal of LTEB5 frequency band received by the second filter 3 are transmitted to the 4g_rx_l1 port of the first radio frequency chip 5. The reception signals of N5 and N8 are transmitted to the same 5G reception port 5g_rx_l1 and the reception signals of B5 and B8 are transmitted to the same 4G reception port 4g_rx_l1 by the switching characteristics of DPDT.
Meanwhile, in the case of PCB layout, the packages of the DPDT switch 4 are 1.5×1.1mm respectively. From the device area, the DPDT switch 4 has an area of 1.65mm 2 。
In the prior art, 2 Single Pole Double Throw (SPDT) switches are usually used, but the VCC power supply filter circuit and the CTRL logic control circuit are added to the switching devices, and in the scheme, the number of circuit devices required by 1 DPDT is only half of the number of the 2 SPDT switching circuit devices, so that a part of area can be saved again in the layout area of the PCB devices. From the SPDT switch to the first rf chip 5 and the second rf chip 6, 4 rf receive wires are required to the receive port; in the scheme, 1 DPDT switch 4 is used, 1 radio frequency receiving wire is walked from DPDT switch 4 to first radio frequency chip 5 and second radio frequency chip 6,5GN5 frequency channel and 5GN8 frequency channel to 5G radio frequency chip receiving port, and 1 radio frequency receiving wire is walked to LTEB5 frequency channel and LTEB8 frequency channel to 4G radio frequency chip receiving port, and 2 receiving radio frequency wires are walked to the total PCB that only needs, has also obviously reduced the degree of difficulty on the PCB is walked.
By adopting the scheme, on the basis of meeting the four frequency band receiving functions of N5 (B5) and N8 (B8), 2 radio frequency chip receiving ports are saved for other frequency bands; the layout area of the PCB device is saved; the wiring difficulty of the PCB for receiving the radio frequency wires is reduced.
Claims (8)
1. A DPDT receiving circuit based radio frequency structure, comprising: the antenna is connected with the first filter and the second filter, the first filter and the second filter are connected with the DPDT switch, and the DPDT switch is connected with the first radio frequency chip and the second radio frequency chip.
2. A radio frequency structure based on a DPDT receiving circuit according to claim 1, wherein the first filter receives signals in 5GN8 band and LTEB8 band.
3. A radio frequency structure based on a DPDT receiving circuit according to claim 1 or 2, wherein the second filter is used to receive signals in 5GN5 band and LTEB5 band.
4. The radio frequency structure based on a DPDT receiving circuit according to claim 1, wherein the first radio frequency chip is a 4G radio frequency chip.
5. The radio frequency structure based on a DPDT receiving circuit according to claim 1, wherein the second radio frequency chip is a 5G radio frequency chip.
6. The radio frequency structure based on a DPDT receiving circuit according to claim 1, wherein the signal in the N8 band received by the first filter and the signal in the N5 band received by the second filter are transmitted to the 5g_rx_l1 port of the second radio frequency chip through the first radio frequency line.
7. The radio frequency structure based on a DPDT receiving circuit according to claim 1 or 6, wherein the signal in the LTEB8 band received by the first filter and the signal in the LTEB5 band received by the second filter are transmitted to the 4g_rx_l1 port of the first radio frequency chip through the second radio frequency line.
8. A radio frequency structure based on a DPDT receiving circuit according to claim 1, wherein the area of the DPDT switch is 1.65mm 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320110133.9U CN219740365U (en) | 2023-01-18 | 2023-01-18 | Radio frequency structure based on DPDT receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320110133.9U CN219740365U (en) | 2023-01-18 | 2023-01-18 | Radio frequency structure based on DPDT receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219740365U true CN219740365U (en) | 2023-09-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320110133.9U Active CN219740365U (en) | 2023-01-18 | 2023-01-18 | Radio frequency structure based on DPDT receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219740365U (en) |
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2023
- 2023-01-18 CN CN202320110133.9U patent/CN219740365U/en active Active
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