Electronic device and method for transmitting and receiving radio frequency signals

A technology of radio frequency signals and electronic equipment, applied in the electronic field, can solve problems such as low receiving sensitivity of electronic equipment, decreased receiving performance, and interference of transmitted signals with received signals, so as to achieve the effects of improving receiving sensitivity, reducing mutual interference, and improving communication quality

Active Publication Date: 2021-05-18
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in existing electronic equipment, there will be a problem that the transmitted signal interferes with the received signal, resulting in low receiving sensitivity of the electronic equipment and a decline in receiving performance.

Method used

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  • Electronic device and method for transmitting and receiving radio frequency signals
  • Electronic device and method for transmitting and receiving radio frequency signals
  • Electronic device and method for transmitting and receiving radio frequency signals

Examples

Experimental program
Comparison scheme
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example 1

[0116] in such as Figure 6 In the electronic equipment shown, the front end of the FDD radio frequency architecture uses a duplexer, and the transceiver sends a signal with a frequency of F(Tx), which is transmitted to the TX port of the duplexer to the ANT port through path 1, and then sent to the antenna for transmission through path 2. Going out, the reception is to receive the signal with frequency F(Rx) through the antenna to the ANT port of the duplexer through path 3 and then to the RX port, and then send it to the transceiver for demodulation through path 4. Since the isolation of the duplexer itself cannot be infinite, some energy of the F(Tx) signal will leak to the RX port, and then enter the transceiver through path 4. At this moment, there are signals of two frequencies F(Tx) and F(Rx) on the path 4, assuming that the power of F(Tx) on the path is 25dBm, and the duplex isolation is 55dBm, then the power leaked to the RX port is 25-55=-30dBm, usually the minimum ...

example 2

[0124] Such as Figure 8 As shown, this example provides another electronic device, including:

[0125] Antenna 1, antenna 1 is connected to the duplexer through path 2 and path 3; the transmit (TX) port through the duplexer is connected to pin 1 of the switch through path 1, and is connected to the transceiver with the power amplifier; at the same time, the antenna 1 is also connected to the transceiver through the receive (RX) port of the duplexer and path 4.

[0126] Antenna 2 is connected to the power amplifier and to the transceiver through path 6 and pin 2 of the switch. On path 6 there is also a transmit (TX) filter. Pin 3 of the switch is connected to the transceiver via path 5.

[0127] Here, the power amplifier is an abbreviation of the power amplifier.

[0128] Add a single-pole double-throw switch between the power amplifier and the duplexer. The 3 pins of the common end of the switch are connected to the output port of the power amplifier, the 1 pin of the swi...

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Abstract

The embodiment of the present application discloses an electronic device and a method for transmitting and receiving radio frequency signals. The electronic device includes: a first antenna; a second antenna; a transceiver, wherein the first antenna is connected to the transceiver through a transmitting radio frequency path and connected to the transceiver through a receiving radio frequency path; the first antenna can The radio frequency signal of the uplink frequency band is obtained through the transmitting radio frequency path and radiated while the first antenna can receive the radio frequency signal of the downlink frequency band and send it to the transceiver through the receiving radio frequency path; wherein, if the first antenna receives The radio frequency signal in the downlink frequency band is sent to the transceiver through the receiving radio frequency path to meet the interference condition, and the second antenna is connected to the transceiver through the auxiliary radio frequency path to suppress interference.

Description

technical field [0001] The present application relates to the field of electronic technology, and in particular to an electronic device and a method for transmitting and receiving radio frequency signals. Background technique [0002] In frequency division duplexing (Frequency Division Duplexing, FDD), generally one antenna is used as a transmitting antenna and a receiving antenna at the same time, but the transmitting frequency of the transmitting antenna is different from the receiving frequency of the receiving antenna. However, in existing electronic devices, there is a problem that the transmitted signal interferes with the received signal, which leads to low receiving sensitivity of the electronic device and a decrease in receiving performance. Contents of the invention [0003] In view of this, the embodiments of the present application are expected to provide an electronic device and a method for transmitting and receiving radio frequency signals. [0004] The tec...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04B1/00H04B1/40H04B1/525
Inventor洪晓锋
OwnerLENOVO (BEIJING) LTD