CN218920419U

CN218920419U - Chip half-duplex frequency conversion receiving and transmitting channel

Info

Publication number: CN218920419U
Application number: CN202223129242.XU
Authority: CN
Inventors: 龚艾琦; 黄逸; 黄东; 赖得阳; 熊胜尧
Original assignee: Sichuan Jiuzhou Electric Group Co Ltd
Current assignee: Sichuan Jiuzhou Electric Group Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-04-25
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses a chip half-duplex variable frequency receiving and transmitting channel, which comprises a first module, a second module, a third module, a fourth module and a fifth module which are connected in sequence: the first module, the second module, the third module, the fourth module and the fifth module all comprise a receiving link and a transmitting link; in the second module and the fourth module, the receiving link and the transmitting link are the same link; and a change-over switch is arranged among the first module, the second module, the third module, the fourth module and the fifth module. The receiving and exciting functions are integrated in the same channel by adopting a receiving and exciting half-duplex design, independent receiving links and exciting links are combined into a whole, receiving or exciting work is met by a program control and a bidirectional amplifying link through receiving and transmitting time-sharing work, the comprehensive degree of the channel is improved, the channel volume is reduced, the number of channels is increased in the same module, the interconnection space between two components is reduced, and the module power consumption and the module cost are reduced.

Description

Chip half-duplex frequency conversion receiving and transmitting channel

Technical Field

The utility model relates to the field of ICNI comprehensive avionics universal modules, in particular to a chip-type half-duplex variable-frequency receiving and transmitting channel.

Background

Radar receiver technology is also evolving rapidly today with the growing popularity of radio and radar technologies. Because of the comprehensive integrated requirement of the secondary radar, the requirements of miniaturization, integration and integration of the secondary radar of the ICNI comprehensive avionics system are higher and higher, and the design of the receiving and exciting module is gradually changed into multiple channels and functions from the original single channel single function. At present, the traditional MMIC hybrid integrated independent receiving and exciting channel is mature and applied to each ICNI comprehensive avionics receiving and exciting module, and along with the continuous progress of hardware design level and chip manufacturing process and the requirements of small volume, low power consumption and multiple channels, the traditional L-band receiving and exciting module cannot meet the comprehensive multifunctional requirements, and the independent receiving and exciting channel design also cannot meet the system miniaturization requirements. The design of the receiving and transmitting sharing and the chip becomes the necessary trend of the miniaturization development of the receiving and exciting module, and the receiving and exciting module is widely applied.

Disclosure of Invention

The utility model aims to provide a chip half-duplex frequency conversion receiving and transmitting channel, which integrates receiving and exciting functions in the same channel by adopting a half-duplex design, improves the comprehensive degree of the channel, reduces the channel volume and increases the number of the channels in the same module by receiving and transmitting time-sharing work.

The utility model is realized by the following technical scheme:

the chip-type half-duplex variable-frequency transceiver channel comprises a first module, a second module, a third module, a fourth module and a fifth module which are sequentially connected:

the first module, the second module, the third module, the fourth module and the fifth module all comprise a receiving link and a transmitting link;

in the second module and the fourth module, the receiving link and the transmitting link are the same link;

and a change-over switch is arranged among the first module, the second module, the third module, the fourth module and the fifth module.

The utility model sets the first module, the second module, the third module, the fourth module and the fifth module to comprise a receiving link and a transmitting link, wherein the receiving link and the transmitting link are the same link in the second module and the fourth module; and a change-over switch is arranged among the first module, the second module, the third module, the fourth module and the fifth module. The receiving and exciting functions are integrated in the same channel by adopting a receiving and transmitting half-duplex design, the comprehensive degree of the channel is improved by receiving and transmitting time-sharing work, the channel volume is reduced, the number of the channels is increased in the same module, and the functional requirements of multiple functional items can be realized by different bandwidths and modes of the same channel through program reconstruction on a system rack.

Further, the switch is used for switching and selecting the transmitting link and the receiving link. And selecting a transmitting link or a receiving link to transmit and receive by setting a change-over switch.

Further, the first module includes: first receiving link and first transmitting link:

the first receiving link includes: the receiving switch, the AGC program-controlled attenuator, the amplifier, the filter network and the power divider are connected in sequence;

the first transmission link includes: the filter network, the amplifier and the emission switch are connected in sequence.

Further, the second module includes: the first mixing network, the temperature compensation network and the second mixing network are connected in sequence.

Further, a temperature compensation network and a second mixing network are arranged between the two networks: a calibrator and amplifier for the receive chain, and a programmer and filter for the transmit chain.

Further, the third module includes: a receive link logarithmic amplification network and a receive link linear amplification network.

Further, the fourth module includes a number of bandwidth conversion networks.

Further, the fifth module includes: fifth receiving link and fifth transmitting link:

the fifth receiving link includes: the program control attenuator, the amplifier, the power divider and the receiving signal output end are connected in sequence;

the fifth transmit chain includes: the switching switch, the filter, the amplifier and the transmitting signal input end are connected in sequence.

Further, the power dividers of the first receiving link and the fifth receiving link are connected with detectors.

Further, a temperature compensator is arranged between the fourth module and the fifth module.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

the receiving and exciting functions are integrated in the same channel by adopting a receiving and transmitting half-duplex design, and the receiving and transmitting time-sharing work improves the comprehensive degree of the channel, reduces the channel volume and increases the number of channels in the same module.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model. In the drawings:

fig. 1 is a schematic diagram of a single-way transceiving link according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a first module of a single-way transceiver link in an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a second module of a single-way transceiver link in an embodiment of the present utility model;

fig. 4 is a schematic diagram of a third module of a single-path transceiver link according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a fourth module of a single-path transceiver link in an embodiment of the present utility model;

fig. 6 is a schematic diagram of a fifth module of a single-path transceiver link in an embodiment of the present utility model.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

Example 1

As shown in fig. 1, embodiment 1 provides a chipped half-duplex variable frequency transceiver channel, which includes a first module, a second module, a third module, a fourth module and a fifth module that are sequentially connected:

The receiving and exciting functions are integrated in the same channel by adopting a receiving and transmitting half-duplex design, the comprehensive degree of the channel is improved by receiving and transmitting time-sharing work, the channel volume is reduced, the number of the channels is increased in the same module, and the functional requirements of multiple functional items can be realized by different bandwidths and modes of the same channel through program reconstruction on a system rack.

In some possible embodiments, a switch is used to switch between the transmit and receive links. And selecting a transmitting link or a receiving link to transmit and receive by setting a change-over switch.

As shown in fig. 2 to 6, the first module includes: first receiving link and first transmitting link: the first receiving link includes: the receiving switch, the AGC program-controlled attenuator, the amplifier, the filter network and the power divider are connected in sequence; the first transmission link includes: the filter network, the amplifier and the emission switch are connected in sequence.

The second module includes: the first mixing network, the temperature compensation network and the second mixing network are connected in sequence. The temperature compensation network and the second mixing network are provided with: a calibrator and amplifier for the receive chain, and a programmer and filter for the transmit chain.

The third module includes: a receive link logarithmic amplification network and a receive link linear amplification network.

The fourth module includes a number of bandwidth conversion networks. The bandwidth conversion network specifically includes five bandwidths: 20.5MHz, 8MHz, 73kHz, 43MHz, 800kHz.

The fifth module includes: fifth receiving link and fifth transmitting link: the fifth receiving link includes: the program control attenuator, the amplifier, the power divider and the receiving signal output end are connected in sequence; the fifth transmit chain includes: the switching switch, the filter, the amplifier and the transmitting signal input end are connected in sequence. The power dividers of the first receiving link and the fifth receiving link are connected with detectors.

A temperature compensator is arranged between the fourth module and the fifth module. The plurality of temperature compensators are arranged because the working temperature of the chip is-55 ℃ -70 ℃, the device characteristics of various devices on the receiving link and the transmitting link at different temperatures are different, and the plurality of temperature compensators are needed to carry out amplitude consistency compensation in the full temperature range.

In some possible embodiments, the receiving channel and the transmitting channel are designed in a cavity, the receiving channel performs amplification, secondary down-conversion, intermediate frequency filtering, program-controlled attenuation and detection functions on the received signals, the transmitting channel performs amplification, secondary up-conversion, filtering and detection functions on the intermediate frequency signals from the DA, and the transceiver up-conversion and down-conversion share resources to realize half-duplex operation. The functions of receiving five bandwidths in each two working modes, bandwidth switching, amplifying, filtering, secondary frequency conversion, program control, detection and the like are completed; exciting four bandwidth switching, amplifying, filtering, secondary frequency conversion, exciting power back-off, detecting and other functions.

In some possible embodiments, after the transceiver performance index is simulated by using ADS simulation software, the channel secondary frequency conversion part is designed into an independent sub-module by using full-chip. The sub-module has high density, and because of the volume limitation of the module, RT4350B plates of Rogowski company are adopted, multi-layer wiring is adopted, and power lines and program control attenuator control lines in the module are all arranged in the middle layer of the printed board, so that the size of the printed board is compressed to the greatest extent. During assembly, the bare chips are bonded and pressed. Because the part adopts the full-chip design, the volume of a receiving and transmitting channel is greatly reduced, and the circuit volume and the weight of the part are reduced to 1/10 of those of the traditional circuit. The bare chip has better stability and circuit matching performance than the packaged device, and the stability of the partial circuit is enhanced.

In some possible embodiments, the utility model is two-in-one of a receiving and transmitting channel and a frequency conversion assembly, and in order to ensure the isolation of a receiving and transmitting circuit and the interference of a redundant local vibration source to a circuit, two power supply modulation chips are adopted to carry out power supply management on the receiving and transmitting circuit and an amplifier in the local vibration source through enabling control, and the receiving and transmitting power is cut off when the receiving and transmitting power is cut off.

In some possible embodiments, due to the complex channel functions and performances, the number of the heating devices such as amplifiers in the channel is large in design, and all the devices are powered on at the same time, so that the module power consumption and the heat consumption are large. In order to reduce the power consumption and the heat consumption of the module, a power supply modulation technology is adopted on the transceiving power supply, and independent power-off treatment is carried out on devices independently used by transceiving on a channel during transceiving time-sharing work, so that the power consumption and the heat consumption of the module are reduced.

In some possible embodiments, one half-duplex frequency conversion transceiver channel comprises two excitation channels of two receiving channels, and the link transceiver secondary frequency conversion part adopts a secondary subcavity full-bare chip design. The low-frequency signals such as switch control, transceiver control, program control attenuator control and the like in the channel are connected with each other by blind plugging of the same-series connectors on the middle-aviation photoelectric J30JG1 series connector and the digital processing board, and the input radio-frequency signals, the output intermediate-frequency signals and the two local oscillation signals are connected with each other by adopting a miniaturized radio-frequency connector SMP on the cavity wall. By adopting the mode, the isolation between channels is increased, and the external field fault positioning and maintenance are also convenient.

In some possible embodiments, the receiving link respectively places detectors at the radio frequency part and the intermediate frequency part, the transmitting link places detectors at the radio frequency part, and the design of multiple detectors can locate the fault position of the channel more accurately through detection amplitude; the detector of the receiving link is also used for judging and adjusting the self-adaptive AGC amplitude, and the rear-end digital processing board automatically adjusts the attenuation amplitude of the AGC program-controlled attenuator of the link by collecting the receiving detection amplitude, so that the receiving intermediate frequency output amplitude is stabilized in a required range.

In some possible embodiments, the transceiver links are respectively provided with programmable attenuators for performing full-temperature and full-frequency amplitude consistency calibration.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The chip-based half-duplex variable-frequency transceiver channel is characterized by comprising a first module, a second module, a third module, a fourth module and a fifth module which are sequentially connected:

2. The chipped half-duplex variable frequency transmit-receive channel of claim 1 wherein the switch is configured to switch between a transmit link and a receive link.

3. The chipped half-duplex variable frequency transceiver channel of claim 1, wherein said first module comprises: first receiving link and first transmitting link:

4. The chipped half-duplex variable frequency transceiver channel of claim 1, wherein said second module comprises a first mixing network, a temperature compensation network and a second mixing network connected in sequence.

5. The chipped half-duplex variable frequency transmit-receive channel according to claim 4, wherein between the temperature compensation network and the second mixing network is provided: a calibrator and amplifier for the receive chain, and a programmer and filter for the transmit chain.

6. The chipped half-duplex variable frequency transmit-receive channel of claim 1 wherein the third module comprises a receive link logarithmic amplification network and a receive link linear amplification network.

7. The chipped half-duplex variable frequency transceiver channel of claim 1, wherein said fourth module comprises a plurality of bandwidth conversion networks.

8. A chipped half-duplex translational receive channel according to claim 3, wherein the fifth module comprises: fifth receiving link and fifth transmitting link:

9. The chipped half-duplex variable frequency transmit-receive channel of claim 8 wherein the power splitters of the first and fifth receive chains are each connected to a detector.

10. The chipped half-duplex variable frequency transmit-receive channel according to claim 1, wherein a temperature compensator is disposed between the fourth and fifth modules.