L-band low-altitude data link communication transceiver circuit

Abstract

The utility model discloses an L-band low-altitude data link communication transmit-receive circuit, comprising a common channel module which comprises a numerical control delayer and a transmit-receive switch; the receiving channel module comprises a first low-noise amplifier and a second low-noise amplifier; the transmitting channel module comprises a driving amplifier and a final-stage amplifier; and the control module comprises a first beam controller and a second beam controller, and is used for receiving a control instruction in series, processing the control instruction, sending the processed control instruction to the modules in parallel and controlling the working states of the modules. According to the technical scheme of the utility model, an L-band continuous wave transmitting and receiving system is built in a microwave integrated circuit form, so that the functions of wide band, high isolation, channel continuous wave transmission and the like are realized, and a foundation is laid for serialization, miniaturization and high reliability of like products.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially relates to a kind of L wave band low altitude data link communication transceiver circuit. BACKGROUND

[0002] The existing L wave band (1-2 GHz) transceiver technology is the key support in radar, satellite communication, navigation enhancement system and other fields, and its core is to utilize the good balance between propagation loss, antenna size, penetration ability and available bandwidth, but the demand of higher power, better sensitivity, more flexible beam control for the existing L wave band transceiver technology is growing, and the contradiction between the power consumption and heat dissipation pressure, isolation limit, system complexity, cost surge and electromagnetic compatibility challenge brought by it is increasingly sharp. SUMMARY

[0003] The main purpose of the utility model is to provide a kind of L wave band low altitude data link communication transceiver circuit, which aims to build L wave band continuous wave transceiver system in the form of microwave integrated circuit, realizes the functions such as wide frequency band, high isolation and continuous wave operation of transmission path, and lays the foundation for serialization, miniaturization and high reliability of similar products.

[0004] To achieve the above purpose, the utility model provides a kind of L wave band low altitude data link communication transceiver circuit, comprising:

[0005] The common channel module includes digital control delay and transceiver switch, the digital control delay adjusts the phase / time delay control of radio frequency signal, and the transceiver switch is used to switch receiving / transmitting signal;

[0006] The receiving channel module includes first low noise amplifier and second low noise amplifier, the first low noise amplifier receives echo signal and carries out preliminary amplification, and the second low noise amplifier further amplifies the signal amplified preliminarily by the first low noise amplifier;

[0007] The transmission channel module includes drive amplifier and final stage amplifier, the drive amplifier receives small power signal from signal source and preliminarily amplifies it, and the final stage amplifier receives signal from drive amplifier and amplifies it to high power level;

[0008] The control module includes first beam controller and second beam controller, and the working state of each module is controlled after the serial reception control instruction is processed and sent in parallel.

[0009] In a possible implementation, the receiving channel module further includes π type attenuator, and the π type attenuator is connected between the first low noise amplifier and the second low noise amplifier.

[0010] In a possible implementation, the transmitting channel module further comprises an isolator for protecting the final stage amplifier from reflected power from the antenna port.

[0011] In a possible implementation, the common channel module further comprises a high power switch connected to the transmitting channel module and the receiving channel module respectively for switching transmitting / receiving signals.

[0012] The technical scheme of the utility model discloses a plurality of unit circuits such as radio frequency high power, radio frequency small signal, power supply and beam control are concentrated in a system, can complete receiving, transmitting, phase adjustment, control and numerous functions, through the working principle analysis of receiving and transmitting module, performance index decomposition, using microwave integrated circuit form has developed L waveband continuous wave receiving and transmitting system, has realized wide frequency band, high isolation, transmitting path continuous wave work and other functions. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to make the technical scheme of the embodiments of the utility model or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0014] Figure 1 It is the circuit schematic diagram of the embodiment of the utility model L waveband low altitude data link communication receiving and transmitting circuit.

[0015] The realization, functional characteristics and advantages of the utility model will be further explained by combining with the embodiments and referring to the drawings. DETAILED DESCRIPTION

[0016] In order to make the technical scheme, technical scheme and advantages of the application clearer, the following will further explain the application by combining with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and not used to limit the application.

[0017] Referring to Figure 1 The utility model discloses a kind of L waveband low altitude data link communication receiving and transmitting circuit, mainly comprising receiving channel module, transmitting channel module, common channel module and control module etc..Receiving channel module is mainly composed of low noise amplifier and subsequent amplifier etc., transmitting channel is mainly composed of driving amplifier, final stage power amplifier, isolator and power amplifier control circuit etc., common channel module is mainly composed of receiving and transmitting switch, six digit control delay timer, six digit control attenuator etc., control module includes beam controller component and power supply and other control components.

[0018] This circuit mainly completes the low noise amplification and transmission of the received signal, the transmission and power amplification of the transmitted signal, the phase shift attenuation control of the radio frequency signal, the transceiver conversion control, the power amplifier monitoring, the power conversion and other functions. In the transmitting state, the power amplifier excitation signal of the module enters the driving power amplifier and the final power amplifier through the attenuator, the phase shifter and the transceiver switch, and the amplified signal is sent out by the high-power transceiver switch. In the receiving state, the received signal is fed in through the transceiver switch, and then the low noise high frequency amplification of the received signal is performed by the low noise amplifier, and then the signal is output after being switched to the phase shifter and the attenuator through the transceiver switch.

[0019] The common channel is mainly composed of a digital controlled attenuator, a digital controlled phase shifter and a transceiver switch. In order to reduce the size of the module, all circuits are in the form of micro single-chip integrated circuits. The digital controlled attenuator adopts a 6-bit digital controlled single-chip attenuator, and the digital controlled delay line adopts a 6-bit delay line. In the design of the common channel module, the digital controlled attenuator is considered to be put in. It has two advantages. First, the amplitude consistency index between modules can be adjusted through the digital controlled attenuator. Second, the user can be provided with a way of transmitting amplitude weighting. The disadvantage is that the digital controlled attenuator is placed in the common channel, which will inevitably increase the loss of the transmitting channel, so it is necessary to increase the gain of the transmitting channel power amplifier link to make up for the loss caused by the digital controlled attenuator.

[0020] The receiving channel is mainly composed of two low noise amplifiers. The insertion loss of the high-power transceiver switch is about 1 dB, and the noise coefficient of the low noise amplifier is less than 1.6 dB. According to the performance of the selected device, the total gain of the two-stage low noise amplifier is about 34 dB, so a 2dB π-type attenuator is added to the receiving channel to provide a fixed gain adjustment amount for system gain calibration and to prevent the input of the second low noise amplifier from being overloaded. This module has high requirements for the amplitude and phase consistency of the receiving channel, and there are many components in the channel. In order to meet the overall amplitude and phase consistency index requirements, in addition to the strict requirements for the amplitude and phase consistency of each component in the assembly, an adjustable transmission line is added to adjust the phase in the circuit design. This method has the characteristics of small size, easy adjustment and good in-band performance.

[0021] The transmitting channel is mainly composed of a driver amplifier, a final power amplifier and an isolator. The driver amplifier receives a small power signal from the signal source and preliminarily amplifies it. The final amplifier receives the signal from the driver amplifier and amplifies it to a high power level. The isolator protects the final amplifier from the reflected power from the antenna port.

[0022] The circuit of the control module receives the control instructions in series, processes the control instructions, and sends the processed control instructions to the remaining components in parallel to control the working states of the remaining components.

[0023] The technical scheme of the utility model discloses a plurality of unit circuits such as radio frequency high power, radio frequency small signal, power supply and beam control are concentrated in one system, a plurality of functions such as receiving, transmitting, phase adjustment and control can be completed, through the analysis of the working principle of the receiving and transmitting module and the decomposition of performance index, the L waveband continuous wave receiving and transmitting system is developed by using microwave integrated circuit form, and wide frequency band, high isolation, continuous wave working of transmitting path and other functions are realized.

[0024] In the description of the present application, it should be understood that if the orientations or position relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or position relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0025] The above is only the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An L-band low-altitude data link communication transceiver circuit, characterized in that, include: The shared channel module includes a numerically controlled delay unit and a transceiver switch. The numerically controlled delay unit adjusts the radio frequency signal to perform phase / time delay control, and the transceiver switch is used to switch between receiving and transmitting signals. The receiving channel module includes a first low-noise amplifier and a second low-noise amplifier. The first low-noise amplifier receives the echo signal and performs preliminary amplification, while the second low-noise amplifier further amplifies the signal that has been preliminarily amplified by the first low-noise amplifier. The transmitting channel module includes a driver amplifier and a final stage amplifier. The driver amplifier receives a low-power signal from a signal source and initially amplifies it. The final stage amplifier receives the signal from the driver amplifier and amplifies it to a high-power level. The control module, including a first beam controller and a second beam controller, receives control commands serially, processes them, and sends them in parallel to the aforementioned modules to control their operating status.

2. The L-band low-altitude data link communication transceiver circuit according to claim 1, characterized in that, The receiving channel module further includes a π-type attenuator, which is connected between the first low-noise amplifier and the second low-noise amplifier.

3. The L-band low-altitude data link communication transceiver circuit according to claim 2, characterized in that, The transmit channel module also includes an isolator to protect the final stage amplifier from damage caused by reflected power from the antenna port.

4. The L-band low-altitude data link communication transceiver circuit according to claim 3, characterized in that, The shared channel module also includes a high-power switch, which is connected to both the transmit channel module and the receive channel module to switch transmit / receive signals.

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