CN214959505U

CN214959505U - 2-6GHz broadband receiving system based on multiple channels

Info

Publication number: CN214959505U
Application number: CN202121260399.9U
Authority: CN
Inventors: 王洪英
Original assignee: Sichuan Zhongxin Weidian Electronic Technology Co ltd
Current assignee: Sichuan Zhongxin Weidian Electronic Technology Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-11-30
Anticipated expiration: 2031-06-07

Abstract

The utility model provides a 2-6GHz broadband receiving system based on multichannel sets up multiunit frequency conversion passageway module, places the wave detector at the receiving link, and real-time supervision signal amplitude and range calibration. The utility model discloses an above-mentioned setting has realized carrying out multichannel communication processing in high altitude area, still possesses range, phase correction/self-checking function simultaneously, possesses range self-checking signal test point.

Description

2-6GHz broadband receiving system based on multiple channels

Technical Field

The utility model belongs to the technical field of communication signal handles, specifically speaking relates to a 2-6GHz broadband receiving system based on multichannel.

Background

In an unmanned aerial vehicle-mounted communication system, a component for broadband receiving comprises a plurality of functional indexes, requires to have multi-channel communication processing capacity, has amplitude and phase correction/self-checking functions, has an amplitude self-checking signal test point, and CAN report a self-checking result through a CAN bus after being collected by an ADC (analog to digital converter).

Along with unmanned aerial vehicle's function extension and performance requirement are higher and higher, unmanned aerial vehicle's electromagnetic environment is more and more complicated, often to the requirement that the anti-jamming ability of receiving component is stronger and stronger, the electromagnetic shield of having done again simultaneously, prevents that electromagnetic leakage from disturbing other electronic systems. Unmanned aerial vehicle's flight altitude often is very high, need guarantee to receive the subassembly and can normally work under the low-pressure. Unmanned aerial vehicle's load requires more and more highly, requires the design lightweight of receiving the subassembly, reduces the ability of weighing to unmanned aerial vehicle.

Aiming at a 2-6GHz broadband receiving assembly, the receiving assembly is required to work at an altitude of more than 10000 m, has multi-channel communication processing capacity, has amplitude and phase correction/self-checking functions, has an amplitude self-checking signal test point, and CAN report a self-checking result function through a CAN bus after being collected by an ADC (analog to digital converter).

SUMMERY OF THE UTILITY MODEL

The utility model discloses based on prior art's above-mentioned demand, provided a 2-6GHz broadband receiving system based on multichannel, set up multiunit frequency conversion passageway module, place the wave detector at the receiving link, real-time supervision signal amplitude and range calibration. The utility model discloses an above-mentioned setting has realized carrying out multichannel communication processing in high altitude area, still possesses range, phase correction/self-checking function simultaneously, possesses range self-checking signal test point.

The utility model discloses specifically realize the content as follows:

the utility model provides a 2-6GHz broadband receiving system based on multiple channels, which is connected with 100M signals; receiving 2-6GHz broadband signals, and converting and sending the signals into intermediate frequency signals; the 2-6GHz broadband receiving system based on multiple channels comprises a control and signal processing unit, a back plate and multiple groups of frequency conversion channel modules;

each frequency conversion channel module comprises a switch filtering unit, a low noise down-conversion amplifier LNB, an equalizer, a first amplifier, a numerical control attenuator, a second amplifier and a coupler which are sequentially connected; the input end of the switch filtering unit receives 2-6GHz broadband signals, and the output end of the coupler sends out intermediate frequency signals;

the coupler of each frequency conversion channel module is also provided with a wave detector, and the frequency conversion channel module is connected with the control and signal processing unit after being connected with the back plate through the wave detector;

the control and signal processing unit is connected with 100M signals.

In order to better implement the present invention, further, each of the frequency conversion channel modules further includes a third amplifier, a first mixer, and a first filter;

the low noise down-conversion amplifier LNB is sequentially connected with the first mixer and the first filter and then connected with the equalizer;

the input end of the third amplifier is connected with an LO1 local oscillator signal, and the output end of the third amplifier is connected with the first mixer.

In order to better implement the present invention, further, each of the frequency conversion channel modules further includes a fourth amplifier, a second mixer, and a second filter;

the first amplifier is connected with the second mixer and the second filter in sequence and then is connected with the numerical control attenuator;

the input end of the fourth amplifier is connected with an LO2 local oscillator signal, and the output end of the fourth amplifier is connected with the second mixer.

In order to better realize the utility model discloses, furtherly, frequency conversion passageway module sets up four groups.

In order to better realize the utility model discloses, furtherly, be provided with CAN bus interface on the control and the signal processing unit. A

In order to better realize the utility model discloses, furtherly, be provided with MLVDS interface on the control and the signal processing unit.

In order to better realize the utility model discloses, furtherly, be provided with the LVDS interface on the control and the signal processing unit.

In order to better realize the utility model discloses, furtherly, be provided with the RS232 interface on the control and signal processing unit.

In order to better realize the utility model discloses, furtherly, be provided with the self-checking interface on the control and the signal processing unit.

Compared with the prior art, the utility model have following advantage and beneficial effect:

the utility model has the multi-channel signal processing capability, and a wave detector is arranged on a receiving link; the utility model discloses CAN real-time supervision signal amplitude and amplitude calibration, the level after the detection is reported to the system by the CAN bus after sampling through the ADC module that sets up in control and the signal processing unit.

Drawings

Fig. 1 is a schematic block diagram of the present invention;

FIG. 2 is a schematic diagram of the modules of the present invention;

fig. 3 is a schematic structural diagram of a single frequency conversion channel module according to the present invention.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments, and therefore should not be considered as limitations to the scope of protection. Based on the embodiments in the present invention, all other embodiments obtained by the staff of ordinary skill in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

the embodiment provides a 2-6GHz broadband receiving system based on multiple channels, as shown in fig. 1, fig. 2, and fig. 3, a 100M signal is connected; receiving 2-6GHz broadband signals, and converting and sending the signals into intermediate frequency signals; the 2-6GHz broadband receiving system based on multiple channels comprises a control and signal processing unit, a back plate and multiple groups of frequency conversion channel modules;

the control and signal processing unit is connected with 100M signals.

The working principle is as follows: the detector detects the output signal of the receiving channel, and the detection level and the signal level are in one-to-one correlation. The detection level can be sampled and reported to the system after being processed, so that the amplitude information of the signal can be monitored in real time and corrected. After the system processes the input and output signals of the signal, the phase information of each channel of the receiving assembly can be obtained, and therefore the phase of each channel is monitored and corrected.

The 2-6GHz link has 4 input paths and 5 output paths, and each path is in a twice frequency conversion superheterodyne mode. Because the input frequency range is wide, a first-stage switch filter bank is required to be arranged at the front end of the input for segmented filtering, the out-of-band spurious is restrained, and meanwhile, in order to reduce the channel noise, a low-noise amplifier is arranged at a proper position at the front end. And a filter is placed after primary and secondary frequency mixing, the bandwidth is set to be 1GHz, and out-of-band spurious signals are further filtered. Due to the wide frequency range of the input signal, an equalizer needs to be placed at a proper position for amplitude equalization of the broadband signal. And detection is output at an output intermediate frequency port (the output intermediate frequency is 1.8 GHz), the self-checking function of the system is realized, and the self-checking result is reported by a CAN bus after the acquisition of the ADC. Meanwhile, a numerical control attenuator is placed at a proper position of the link, and the flatness of the channel in the full frequency range is ensured.

The MLVDS interface is a radio frequency module control MLVDS bus interface, and is mainly used for module control, and a communication protocol of the MLVDS interface is undetermined.

4 pairs of LVDS interfaces are set, and 1.8V differential pairs are reserved.

CAN1_ H +/CAN1_ L: the state CAN bus has the data rate of 1Mbps and is mainly used for reporting the state of a module, and the bus is driven by STM32F407 in a unified mode. The CAN address is read in by the FPGA according to GA 0-GA 3 and is distributed to STM32 through SPI.

It should be noted that fig. 3 is a schematic structural diagram of a single frequency conversion channel module in fig. 2, and the structure shown in fig. 3 is completely the same as that of the single frequency conversion channel module in fig. 2, because the number of modules in fig. 2 is relatively dense, please refer to the schematic in fig. 2 if the single module in fig. 2 is not clearly shown.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.

Claims

1. A2-6 GHz broadband receiving system based on multichannel is connected with 100M signals; receiving 2-6GHz broadband signals, and converting and sending the signals into intermediate frequency signals; the device is characterized by comprising a control and signal processing unit, a back plate and a plurality of groups of frequency conversion channel modules;

the control and signal processing unit is connected with 100M signals.

2. The multi-channel based 2-6GHz wideband receiving system of claim 1, wherein each of the frequency conversion channel modules further comprises a third amplifier, a first mixer, and a first filter;

3. The multi-channel based 2-6GHz wideband receiving system of claim 2, wherein each of the frequency conversion channel modules further comprises a fourth amplifier, a second mixer, and a second filter;

4. The multi-channel based 2-6GHz wideband receiving system of claim 1, wherein each of the frequency conversion channel modules further comprises a fourth amplifier, a second mixer, and a second filter;

5. A2-6 GHz broadband receiving system based on multiple channels as claimed in claim 1 or 2 or 3 or 4 characterized in that, the frequency conversion channel modules are arranged in four groups.

6. The multi-channel based 2-6GHz broadband receiving system of claim 5, wherein the control and signal processing unit is provided with a CAN bus interface.

7. A multi-channel based 2-6GHz broadband reception system according to claim 5 characterized in that said control and signal processing unit is provided with an MLVDS interface.

8. The multi-channel based 2-6GHz broadband receiving system according to claim 5, wherein the control and signal processing unit is provided with an LVDS interface.

9. The multi-channel based 2-6GHz broadband receiving system of claim 5 wherein the control and signal processing unit is provided with an RS232 interface.

10. A multi-channel based 2-6GHz broadband receiving system according to claim 5 and characterized in that the control and signal processing unit is provided with a self-test interface.