CN218976689U

CN218976689U - Radio frequency signal power attenuation and phase delay module

Info

Publication number: CN218976689U
Application number: CN202320176987.7U
Authority: CN
Inventors: 潘安超; 戴进
Original assignee: Changsha Chixin Semiconductor Technology Co ltd
Current assignee: Changsha Chixin Semiconductor Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-05-05
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a radio frequency signal power attenuation and phase delay module which comprises a signal input end, a power divider and a plurality of paths of power attenuation and phase delay channels which are sequentially connected, wherein each path of power attenuation and phase delay channel comprises a radio frequency switch, a variable attenuator, a phase delay and an output end which are sequentially connected, and the power divider is respectively connected with the radio frequency switches in the paths of power attenuation and phase delay channels.

Description

Radio frequency signal power attenuation and phase delay module

Technical Field

The utility model relates to the field of radio frequency signal processing, in particular to a radio frequency signal power attenuation and phase delay module.

Background

In the process of testing ultra-wideband products, the amplitude of the ultra-wideband signals needs to be attenuated, and the phase of the ultra-wideband signals needs to be adjusted. Few existing schemes in the market meet the two requirements at the same time, and individual manufacturers have products meeting the two requirements at the same time, but the price is high. The multi-channel radio frequency signal attenuation control and phase control module is relatively low in cost.

Disclosure of Invention

Aiming at the defects existing in the prior art, the embodiment of the utility model aims to provide a radio frequency signal power attenuation and phase delay module which realizes the functions of multi-channel and signal attenuation by using a radio frequency switch, a power divider and a numerical control radio frequency attenuator and realizes the phase delay function by using a voltage-controlled phase delay device and a high-precision DAC.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the power divider is respectively connected with the radio frequency switches in the power attenuation and phase delay channels.

As a further scheme of the utility model, the radio frequency signal comprises 4 paths of power attenuation and phase delay channels, and after being input through a signal input end, the radio frequency signal is divided into the 4 paths of power attenuation and phase delay channels through a power divider.

As a further scheme of the utility model, the power divider comprises a power supply, a control board and a radio frequency board, wherein the input end and the power divider are positioned on the power supply and the control board.

As a further scheme of the utility model, the power supply and the power supply of the control panel adopt LDO TPS7A3901 of the module power supply LTM8049+TI of ADI as a power core device, 15V provides power for the radio frequency device, and 3.3V provides power for the digital device.

As a further scheme of the utility model, the control circuit of the power supply and the control board adopts STM32F407 as a main control MCU, adopts AD669 as a control DAC of the phase delayer, and adopts GPIO control between the MCU and the DAC.

As a further scheme of the utility model, the radio frequency switch, the variable attenuator, the phase delay and the output end are positioned on the radio frequency board.

The utility model has the following beneficial effects: the utility model utilizes the radio frequency switch, the power divider and the numerical control radio frequency attenuator to realize the functions of multi-channel and signal attenuation, and utilizes the voltage-controlled phase delay device and the high-precision DAC to realize the phase delay function; an F407 series singlechip of an artificial semiconductor is used as a main control chip, USB is used for communication with an upper PC, and functions are realized by controlling a control DAC of the attenuator and the phase retarder through a GPIO interface.

In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a block diagram of a radio frequency signal power attenuation and phase delay module according to the present utility model.

Fig. 2 is a circuit diagram of a power module in a power supply and control board provided by the utility model.

Fig. 3 is a circuit diagram of a control circuit of a power supply and a control board provided by the utility model.

Fig. 4 is a schematic structural diagram of the power supply and control board provided by the present utility model.

Fig. 5 is a schematic structural diagram of a radio frequency board provided by the present utility model.

Detailed Description

The utility model will be further described in the following clear and complete description with reference to the figures and the associated knowledge, it being evident that the described applications are only some, but not all embodiments of the utility model.

The power attenuation and phase delay module of the radio frequency signal is shown with reference to fig. 1, and comprises a signal input end 1, a power divider 2 and a plurality of paths of power attenuation and phase delay channels which are sequentially connected, wherein each path of power attenuation and phase delay channel comprises a radio frequency switch 3, a variable attenuator 4, a phase delay 5 and an output end 6 which are sequentially connected, and the power divider 2 is respectively connected with the radio frequency switch 3 in the plurality of paths of power attenuation 4 and phase delay channels. The utility model utilizes the radio frequency switch 3, the power divider 2 and the numerical control radio frequency attenuator to realize the functions of multichannel and signal attenuation, and utilizes the voltage-controlled phase delay device and the high-precision DAC to realize the phase delay function.

Specifically, referring to fig. 1, a radio frequency signal has one input, is divided into 4 paths by a power divider, and reaches an output port by a variable attenuator and a phase delay. The module adopts F407 series singlechip of an artificial semiconductor as a main control chip, adopts USB to communicate with an upper PC, and realizes the functions by controlling a control DAC of the attenuator and the phase retarder through a GPIO interface.

In the present utility model, referring to fig. 2, 3 and 4, the power and control board 10 and the radio frequency board 20 are shown, wherein the input terminal 1 and the power divider 2 are located in the power and control board 10, further preferably, the power of the power and control board 10 uses the LDO TPS7a3901 of the modular power ltm8049+ti of ADI as a power core device, the power is provided for the radio frequency device by ±15v, the power is provided for the digital device by ±33.3v, and the control circuit of the power and control board uses STM32F407 as a master control MCU, uses AD669 as a control DAC of the phase retarder, and uses GPIO control between the MCU and DAC.

In the present utility model, referring to fig. 5, the radio frequency switch 3, the variable attenuator 4, the phase retarder 5 and the output terminal 6 are located on the radio frequency board 20. The utility model realizes the functions of multichannel and signal attenuation by using the radio frequency switch, the power divider and the numerical control radio frequency attenuator, realizes the phase delay function by using the voltage-controlled phase delay device and the high-precision DAC, and simultaneously realizes the functions of signal attenuation and phase delay.

The specific implementation mode is as follows:

the utility model provides a radio frequency signal power decay and phase delay module adopts disconnect-type PCB design, divide into a power and control panel 10, a radio frequency board 20, and the radio frequency signal has one way input, utilizes radio frequency switch 3, power divider 2, and the function that the numerical control radio frequency attenuator realized multichannel and signal decay utilizes voltage-controlled phase delay ware and high accuracy DAC to realize the phase delay function, specifically divide into 4 ways through the power divider, and every way passes through variable attenuator and phase delay ware again and reaches the delivery outlet. The module adopts F407 series singlechip of an artificial semiconductor as a main control chip, adopts USB to communicate with an upper PC, and realizes the functions by controlling a control DAC of the attenuator and the phase retarder through a GPIO interface.

Referring to fig. 4, the power supply and control board 10 is shown, wherein the power supply adopts LDO TPS7a3901 of modular power supply ltm8049+ti of ADI as a power core device. As shown in fig. 2, ±15V is the power supply of the radio frequency device, ±3.3v is the power supply of the digital device. Referring to fig. 3, the control circuit uses STM32F407 as a master MCU, uses AD669 as a control DAC of a phase retarder, and uses GPIO control between the MCUs and the DAC. The input end 1 and the power divider 2 are positioned on the power supply and control board 10.

Referring to fig. 5, the radio frequency board 20 is provided with a radio frequency switch 3, and the attenuators are cascaded with 3 digital control attenuators, so that attenuation control of 10dB-90dB can be realized, and the attenuation is stepped by 0.5dB. The phase retarder may support a phase delay of 180 ° -360 °. The utility model has low cost and realizes signal attenuation and phase delay, in particular to a multi-channel and signal attenuation function realized by using a radio frequency switch, a power divider and a numerical control radio frequency attenuator, and a phase delay function realized by using a voltage-controlled phase delay device and a high-precision DAC.

The technical principle of the present utility model has been described above in connection with specific embodiments, but is only the preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. Other embodiments of the utility model will occur to those skilled in the art without the exercise of inventive effort and are intended to fall within the scope of the utility model.

Claims

1. The power divider is respectively connected with the radio frequency switches in the power attenuation and phase delay channels.

2. The radio frequency signal power attenuation and phase delay module as claimed in claim 1, comprising 4 power attenuation and phase delay channels, wherein the radio frequency signal is divided into said 4 power attenuation and phase delay channels through a power divider after being inputted through a signal input terminal.

3. The radio frequency signal power attenuation and phase delay module according to claim 2, comprising a power supply and control board and a radio frequency board, wherein the input and the power divider are located on the power supply and control board.

4. A radio frequency signal power attenuation and phase delay module as claimed in claim 3 wherein the power supply and control board uses the LDO TPS7a3901 of the ADI module power ltm8049+ti as the power core device, ±15v for power supply to the radio frequency device, ±3.3v for power supply to the digital device.

5. A radio frequency signal power attenuation and phase delay module as claimed in claim 3 wherein the control circuit of the power supply and control board uses STM32F407 as the master MCU, AD669 as the control DAC of the phase delay, GPIO control between the MCU and DAC.

6. A radio frequency signal power attenuation and phase delay module as claimed in claim 3 wherein said radio frequency switch, variable attenuator, phase delay and output are located on a radio frequency board.