CN214380917U

CN214380917U - Automatic dual-mode power detection device for multiple radio frequency signals

Info

Publication number: CN214380917U
Application number: CN202120556911.8U
Authority: CN
Inventors: 平旭; 徐晓勇; 王亚梅
Original assignee: Beijing Tongfang Gigamega Technology Co Ltd
Current assignee: Beijing Tongfang Gigamega Technology Co Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-10-08
Anticipated expiration: 2031-03-18

Abstract

An automatic dual-mode power detection device for multiple radio frequency signals relates to the field of radio. The utility model discloses the device includes high performance singlechip and the multichannel radio frequency input circuit who links to each other with it. Each path of radio frequency input circuit comprises a dual-mode detection circuit, and an input radio frequency signal passes through the dual-mode detection circuit and then outputs an envelope detection voltage signal and an average power detection voltage signal. The envelope detection voltage signal is divided into two paths, one path is directly connected with the AD input of the single chip microcomputer, and the other path is connected to a pulse capture input interface of the single chip microcomputer after sequentially passing through a signal scaling and shaping circuit; the average power detection voltage signal is directly connected with the AD input of the singlechip. The utility model discloses can distinguish signal type automatically and be pulse signal or non-pulse signal to handle respectively according to signal type. Under the condition of the pulse signal, the pulse width, the pulse signal repetition frequency, the peak power value and the related parameters of the pulse signal can be accurately detected.

Description

Automatic dual-mode power detection device for multiple radio frequency signals

Technical Field

The utility model relates to the radio field, concretely relates to multichannel radio frequency signal automatic power detection system detection device.

Background

There are many power detection systems at the output of the rf power amplifier, and there is usually only one display mode for power display, which displays the average power or displays the peak power. Because the signal passed by the radio frequency power amplifier during operation may be a pulse signal or a non-pulse signal, the existing ordinary power detection circuit cannot automatically distinguish whether the signal type is a pulse signal or a continuous wave signal, and thus cannot correctly detect the peak power or the average power, in view of the situation that both signals may occur on the same device. The requirement of a peak holding circuit in a peak detection circuit realized by an analog circuit is too high, and the stability is not high; some adaptive detection systems can distinguish signal types and display corresponding power values, but the systems are too complex, and devices such as an FPGA (field programmable gate array) and the like are needed to analyze a modulation mode through a software radio mode and then perform power measurement.

Disclosure of Invention

To the not enough of existence among the above-mentioned prior art, the utility model aims at providing a simple and easy automatic bimodulus power detection device of multichannel radio frequency signal who uses hardware detection circuit and singlechip as the basis. It can automatically distinguish whether the signal type is a pulse signal or a non-pulse signal; and respectively processing according to the signal types: if the average power value is taken for non-pulse signals, the peak power is taken for pulse signals. Under the condition of the pulse signal, the pulse width, the pulse signal repetition frequency, the peak power value and the related parameters of the pulse signal can be accurately detected.

In order to achieve the above object, the technical solution of the present invention is implemented as follows:

the automatic double-mode power detector for several RF signals has the structure characteristic of comprising high performance monochip computer and several RF input circuits connected to the monochip computer. Each path of radio frequency input circuit comprises a dual-mode detection circuit, and an input radio frequency signal passes through the dual-mode detection circuit and then outputs an envelope detection voltage signal and an average power detection voltage signal. The envelope detection voltage signal is divided into two paths, one path is directly connected with the AD input of the single chip microcomputer, and the other path is connected to a pulse capture input interface of the single chip microcomputer after sequentially passing through a signal scaling and shaping circuit; the average power detection voltage signal is directly connected with the AD input of the singlechip.

In the automatic dual-mode power detection device for the multiple radio-frequency signals, the single chip microcomputer captures pulse edges through built-in software, triggers pulse signal processing, and outputs pulse signal width, duty ratio, repetition frequency, peak power and average power value. The single chip microcomputer provides a data value of multi-path power detection to the upper computer through a communication bus RS458 or CAN.

The utility model discloses owing to adopted above-mentioned structure, gather the rising edge condition of actual detection voltage and envelope signal with the singlechip, calculate the target power value that detection voltage corresponds according to the voltage and the power corresponding relation table of setting for in the procedure. Automatically distinguishing whether the signal type is a pulse signal or a non-pulse signal; and respectively processing according to the signal types: if the average power value is taken for non-pulse signals, the peak power is taken for pulse signals. Under the condition of the pulse signal, the pulse width, the pulse signal repetition frequency, the peak power value and the related parameters of the pulse signal can be accurately detected.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is a schematic diagram of a circuit principle framework of the present invention;

fig. 2 is a schematic diagram of a port of the single chip microcomputer according to an embodiment of the present invention;

fig. 3 is a block diagram of the embedded software functional module of the single chip in the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiment is only one embodiment of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained without creative work in the field all belong to the protection scope of the present invention.

Referring to fig. 1, the hardware circuit in the power detection system of the present invention includes a dual-mode detection circuit 2 for rf envelope detection and average power detection, a single chip 1, and an interface driving circuit. The input of the singlechip 1 is respectively connected with an envelope pulse detection circuit, an envelope signal voltage detection circuit and an average power voltage detection circuit. Each path of power monitoring is from a radio frequency signal input to an output digital power value, two detection voltages, an envelope detection voltage signal and an average power detection voltage signal need to be output through a dual-mode detection circuit 2.1, and one path of the envelope detection voltage signal is connected to a pulse capturing input interface of a single chip microcomputer 1 after being subjected to signal scaling 3 and a shaping circuit 4; meanwhile, the other path of the envelope detection voltage signal is directly transmitted to the AD interface of the single chip microcomputer 1, and the average power detection voltage signal output by the dual-mode detection circuit 2 is directly connected to the AD interface of the single chip microcomputer 1.

Fig. 3 is a block diagram of a functional module of the single chip microcomputer. After the single chip microcomputer system is initialized, the single chip microcomputer system enters a normal working state, firstly, whether a pulse edge signal exists is judged, if yes, the ADC is triggered to collect peak power, and meanwhile, the single chip microcomputer collects relevant parameters (pulse width, duty ratio, repetition frequency and the like) of the pulse signal. If no pulse signal is detected, an average power value is acquired. And carrying out data processing after AD acquisition. When the upper computer issues the query command through the communication bus, the upper computer generates interruption and enters the data communication module, and the program returns to the infinite loop processing process after the interruption is finished.

The utility model discloses a there is three routes power detection voltage control circuit among the power detection device, the principle is the same, singlechip 1 of sharing. Referring to fig. 2, each input rf signal is detected by a dual-mode detector circuit 2 to be dc. The detection modes include envelope detection and average power detection. After the signal output by the envelope detection is processed by the signal conditioning and the pulse trigger signal is output, the signal is sent to

pins

22,23 and 24 of the single chip microcomputer for pulse input and capture. The voltage output by the envelope detection mode and the average power detection mode is respectively sent to

pins

30 and 25,34 and 35, and

pins

16 and 32 of the single chip microcomputer for analog-to-digital conversion. And inquiring the corresponding power value according to a preset table. Meanwhile,

pins

70 and 71 of the singlechip 1 are connected to a communication bus driving chip and are communicated with an upper computer. And receiving an instruction sent by the upper computer, comparing the internal parameters, and uploading power information.

Claims

1. An automatic dual-mode power detection device for multiple radio-frequency signals is characterized by comprising a high-performance single chip microcomputer (1) and multiple radio-frequency input circuits connected with the single chip microcomputer, wherein each radio-frequency input circuit comprises a dual-mode detection circuit (2), the input radio-frequency signals pass through the dual-mode detection circuit (2) and then output envelope detection voltage signals and average power detection voltage signals, the envelope detection voltage signals are divided into two paths, one path of the envelope detection voltage signals is directly connected with an AD (analog-to-digital) input of the single chip microcomputer (1), and the other path of the envelope detection voltage signals sequentially passes through a signal scaling circuit (3) and a shaping circuit (4) and then is connected to a pulse capture input interface of the single chip microcomputer (1); the average power detection voltage signal is directly connected with the AD input of the singlechip (1).

2. The automatic dual-mode power detection device for the multiple radio-frequency signals according to claim 1, wherein the single chip microcomputer (1) captures pulse edges through built-in software, triggers pulse signal processing, and outputs pulse signal width, duty ratio, repetition frequency, peak power and average power value.