WO-2025246583-A9 - RADIO FREQUENCY DEVICE AND COMMUNICATION DEVICE

WO2025246583A9WO 2025246583 A9WO2025246583 A9WO 2025246583A9WO-2025246583-A9

Abstract

A radio frequency device and a communication device. The radio frequency device comprises a first signal transmission circuit, a second signal transmission circuit, a first coupling element, and a second coupling element. A first input port and a first output port of the first coupling element are respectively connected to the first signal transmission circuit and a first antenna. A second input port and a second output port of the second coupling element are respectively connected to the second signal transmission circuit and a second antenna. A first branch and a second branch are connected between the first coupling element and the second coupling element. A first switch is provided on the first branch, a second switch is provided on the second branch, and the first switch and the second switch are controlled by a processor to be in a closed state or an open state. When the first switch and the second switch are in the closed state, the radio frequency device allocates signals to the first antenna and the second antenna, thereby achieving the optimization of communication performance.

Inventors

LIU, JINGHUI
RUAN, WEI

Assignees

华为技术有限公司

Dates

Publication Date: 20260507
Application Date: 20250325
Priority Date: 20240529

Claims (19)

A radio frequency device, characterized in that it comprises: a first signal transmission circuit and a second signal transmission circuit, as well as a first coupling element and a second coupling element; The first signal transmission circuit is connected to the first input port of the first coupling element, and the first output port of the first coupling element is used to connect to the first antenna; the second signal transmission circuit is connected to the second input port of the second coupling element, and the second output port of the second coupling element is used to connect to the second antenna. A first branch and a second branch are connected between the first coupling element and the second coupling element. A first switch is provided on the first branch, and a second switch is provided on the second branch. The first switch and the second switch are in a closed state or an open state based on the control of the processor.
The radio frequency device according to claim 1 is characterized in that the characteristic impedance between the first input port and the first connection point, the characteristic impedance between the first output port and the second connection point, the characteristic impedance between the second input port and the third connection point, the characteristic impedance between the second output port and the fourth connection point, and the characteristic impedance of the first branch and the second branch are the same. The characteristic impedance between the first connection point and the second connection point, and the characteristic impedance between the third connection point and the fourth connection point are the same; the ratio of the characteristic impedance between the first connection point and the second connection point to the characteristic impedance of the first branch is... Wherein, the first connection point is the connection point between the first branch and the first coupling element, the second connection point is the connection point between the second branch and the first coupling element, the third connection point is the connection point between the first branch and the second coupling element, and the fourth connection point is the connection point between the second branch and the second coupling element.
The radio frequency device according to claim 1 or 2, characterized in that the distance between the first connection point and the second connection point, the distance between the first connection point and the third connection point, the distance between the second connection point and the fourth connection point, and the distance between the third connection point and the fourth connection point are all... Where λ is the signal wavelength; Wherein, the first connection point is the connection point between the first branch and the first coupling element, the second connection point is the connection point between the second branch and the first coupling element, the third connection point is the connection point between the first branch and the second coupling element, and the fourth connection point is the connection point between the second branch and the second coupling element.
The radio frequency device according to any one of claims 1-3 is characterized in that the first coupling element and the second coupling element are arranged in parallel and symmetrically, and the first branch and the second branch are arranged in parallel and symmetrically.
The radio frequency device according to any one of claims 1-4 is characterized in that the first coupling element and the second coupling element are strip transmission media.
A communication device, characterized in that it includes a processor and a radio frequency device as described in any one of claims 1-5, wherein the processor is configured to send control signals to a first switch and a second switch within the radio frequency device.
The communication device according to claim 6, wherein the processor is specifically used for: The first switch and the second switch are controlled according to the first feedback information and the second feedback information; the first feedback information is used to indicate the signal transmission performance corresponding to the first antenna, and the second feedback information is used to indicate the signal transmission performance corresponding to the second antenna.
The communication device according to claim 7, wherein the processor is specifically used for: If, based on the first feedback information and the second feedback information, it is determined that the performance difference between the signal transmission performance corresponding to the first antenna and the signal transmission performance corresponding to the second antenna is within a first range, then the first switch and the second switch are controlled to open; or, If, based on the first feedback information and the second feedback information, it is determined that the performance difference between the signal transmission performance corresponding to the first antenna and the signal transmission performance corresponding to the second antenna is not within the first range, then the first switch and the second switch are controlled to close.
The communication device according to claim 7 or 8, characterized in that the first feedback information and the second feedback information come from a signal receiving device, the first feedback information includes the average signal-to-noise ratio of the first spatial stream on the resource unit, the second feedback information includes the average signal-to-noise ratio of the second spatial stream on the resource unit, the first spatial stream is transmitted through the first antenna, and the second spatial stream is transmitted through the second antenna.
The communication device according to any one of claims 6-9, wherein the first switch and the second switch are in a closed state; The processor is also used for: Align the amplitudes of the signals transmitted through the first signal transmission circuit with those transmitted through the second signal transmission circuit; The power allocation ratio of the first antenna and the second antenna is determined based on the first feedback information and the second feedback information. The first feedback information is used to indicate the signal transmission performance of the first antenna, and the second feedback information is used to indicate the signal transmission performance of the second antenna. The phase of the signal output from the first signal transmission circuit to the first input port and the phase of the signal output from the second signal transmission circuit to the second input port are determined according to the power distribution ratio.
A radio frequency device, characterized in that it comprises: a first signal transmission circuit and a second signal transmission circuit, as well as a first coupling element and a second coupling element; The first signal transmission circuit is connected to the first input port of the first coupling element, and the first output port of the first coupling element is used to connect to the first antenna; the second signal transmission circuit is connected to the second input port of the second coupling element, and the second output port of the second coupling element is used to connect to the second antenna. The first coupling element includes a first part and a second part, with a first switch disposed between the first part and the second part. The second coupling element includes a third part and a fourth part, with a second switch disposed between the third part and the fourth part. A first branch is connected between the first part of the first coupling element and the third part of the second coupling element, and a third switch is disposed on the first branch. The first switch, the second switch, and the third switch are in one of the following states based on processor control: First state: The first switch and the second switch are closed, and the third switch is open; Second state: The first switch and the third switch are closed, and the second switch is open; Third state: The second switch and the third switch are closed, and the first switch is open.
The radio frequency device according to claim 11 is characterized in that the first coupling element and the second coupling element are parallel and symmetrical, and the first branch is arranged perpendicular to the first coupling element and the second coupling element.
The radio frequency device according to claim 11 or 12 is characterized in that the first coupling element and the second coupling element are strip-shaped transmission media.
A communication device, characterized in that it includes a processor and a radio frequency device as described in any one of claims 11-13, wherein the processor is configured to send control signals to a first switch, a second switch and a third switch within the radio frequency device.
The communication device according to claim 14, wherein the processor is specifically used for: The first switch, the second switch, and the third switch are controlled according to the first feedback information and the second feedback information; the first feedback information is used to indicate the signal transmission performance corresponding to the first antenna, and the second feedback information is used to indicate the signal transmission performance corresponding to the second antenna.
The communication device according to claim 15, wherein the processor is specifically used for: If, based on the first feedback information and the second feedback information, it is determined that the performance difference between the signal transmission performance corresponding to the first antenna and the signal transmission performance corresponding to the second antenna is within a first range, then the first switch and the second switch are closed, and the third switch is opened; or, If, based on the first feedback information and the second feedback information, it is determined that the performance difference between the signal transmission performance corresponding to the first antenna and the signal transmission performance corresponding to the second antenna is not within the first range, and the signal transmission performance corresponding to the first antenna is greater than the signal transmission performance corresponding to the second antenna, then the first switch and the third switch are controlled to close, and the second switch is controlled to open; or, If, based on the first feedback information and the second feedback information, it is determined that the performance difference between the signal transmission performance corresponding to the first antenna and the signal transmission performance corresponding to the second antenna is not within the first range, and the signal transmission performance corresponding to the first antenna is less than the signal transmission performance corresponding to the second antenna, then the second switch and the third switch are controlled to close, and the first switch is controlled to open.
The communication device according to claim 15 or 16, wherein the first feedback information and the second feedback information are from a signal receiving device, the first feedback information includes the average signal-to-noise ratio of the first spatial stream on the resource unit, the second feedback information includes the average signal-to-noise ratio of the second spatial stream on the resource unit, the first spatial stream is transmitted through the first antenna, and the second spatial stream is transmitted through the second antenna.
The communication apparatus according to any one of claims 14-17 is characterized in that it further comprises a third signal transmission circuit, the third signal transmission circuit being connected to a third antenna; When the first switch, the second switch, and the third switch are in the second state, the processor is further configured to: Align the amplitudes of the signals transmitted through the first signal transmission circuit with those transmitted through the second signal transmission circuit; The phase of the signal output from the first signal transmission circuit to the first input port is set according to N candidate phase differences, and the phase of the signal output from the second signal transmission circuit to the second input port is set. N received signal strengths (RSSIs) from the third signal transmission circuit are received. The N RSSIs correspond to the N candidate phase differences. The N RSSIs are the RSSIs of the signal transmitted by the third antenna to the first antenna, and N is an integer greater than 1. Select the target phase difference from the N candidate phase differences based on the N RSSIs; Based on the target phase difference, the phase of the signal output from the first signal transmission circuit to the first input port and the phase of the signal output from the second signal transmission circuit to the second input port are set.
The communication device according to any one of claims 14-17 is characterized in that it further includes a third signal transmission circuit, the third signal transmission circuit being connected to a third antenna; When the first switch, the second switch, and the third switch are in the third state, the processor is further configured to: Align the amplitudes of the signals transmitted through the first signal transmission circuit with those transmitted through the second signal transmission circuit; The phase of the signal output from the first signal transmission circuit to the first input port is set according to N candidate phase differences, and the phase of the signal output from the second signal transmission circuit to the second input port is set. N received signal strengths (RSSI) from the third signal transmission circuit are received. The N RSSIs correspond to the N candidate phase differences. The N RSSIs are the RSSIs of the signal transmitted by the third antenna to the second antenna, and N is an integer greater than 1. Select the target phase difference from the N candidate phase differences based on the N RSSIs; Based on the target phase difference, the phase of the signal output from the first signal transmission circuit to the first input port and the phase of the signal output from the second signal transmission circuit to the second input port are set.

Description

A radio frequency device and a communication device Cross-reference of related applications This application claims priority to Chinese Patent Application No. 202410687969.4, filed on May 29, 2024, entitled "A Radio Frequency Device and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field This application relates to the field of wireless communication technology, and in particular to a radio frequency device and a communication device. Background Technology Multiple-Input Multiple-Output (MIMO) is a wireless technology that uses multiple transmit antennas and multiple receive antennas to transmit data simultaneously. From the transmitting device to the receiving device, the wireless signal corresponds to a spatial stream; that is, each spatial stream can be regarded as an independent signal transmission channel. Therefore, multiple spatial streams are transmitted through multiple transmit antennas and multiple receive antennas. However, under specific channel conditions or environments, such as when there are differences in the quality of signals transmitted from the transmitting device to the receiving device (or when there are differences in the reception quality of multiple receiving antennas of the receiving device), how to optimize communication performance is a technical problem that needs to be solved. Summary of the Invention This application provides a radio frequency device and a communication device for optimizing communication performance. In a first aspect, this application provides a radio frequency (RF) device that can be applied to a transmitting device. The transmitting device can be an access network device on the network side or a terminal device on the terminal side. The RF device includes a first signal transmission circuit and a second signal transmission circuit, as well as a first coupling element and a second coupling element; wherein the first signal transmission circuit is connected to a first input port of the first coupling element, and a first output port of the first coupling element is used to connect to a first antenna; the second signal transmission circuit is connected to a second input port of the second coupling element, and a second output port of the second coupling element is used to connect to a second antenna; a first branch and a second branch are connected between the first coupling element and the second coupling element, a first switch is provided on the first branch, and a second switch is provided on the second branch; the first switch and the second switch are controlled by a control signal and are either in a closed state or an open state. Using the aforementioned radio frequency device, when the first and second switches are closed under processor control, the first output port acts as a direct-through port to the first input port, the second output port acts as a coupling port to the first input port, and the first output port acts as a coupling port to the second input port, while the second output port acts as a direct-through port to the second input port. Therefore, the signal output from the first output port can be a mixture of the signal from the first input port and the phase-shifted signal from the second input port, and the signal output from the second output port can be a mixture of the phase-shifted signal from the first input port and the signal from the second input port. Alternatively, the signal fed into the first input port is distributed to both the first and second output ports, and the signal fed into the second input port is also distributed to both the first and second output ports, allowing the signal fed into either the first or second input port to be transmitted in two spatial streams, thus optimizing communication performance. When the first switch and the second switch are in the off state based on the processor's control, the signal fed into the first input port and the signal fed into the second input port are transmitted through the first antenna and the second antenna respectively, that is, they are transmitted in different spatial streams, reducing interference of transmitted signals and optimizing communication performance. In one possible implementation, the characteristic impedances between the first input port and the first connection point, the first output port and the second connection point, the second input port and the third connection point, the second output port and the fourth connection point, and the characteristic impedances of the first branch and the second branch are the same; the characteristic impedances between the first connection point and the second connection point, and the third connection point and the fourth connection point are the same; the ratio of the characteristic impedance between the first connection point and the second connection point to the characteristic impedance of the first branch is... Wherein, the first connection point is