Ka-band up-down conversion system

Abstract

The utility model relates to a Ka-band up-down conversion system, which relates to the technical field of radar transmit-receive system electronic countermeasure, and comprises an up-conversion channel, a down-conversion channel, a local oscillator fundamental frequency generation circuit, a frequency multiplication power division amplification circuit and a power supply control communication circuit, wherein the up-conversion channel comprises a first attenuator, a first filter, a second filter, a first amplifier, a first equalizer, a second amplifier, a third filter, a coupler and a second attenuator which are connected in sequence; and the down-conversion channel comprises a third attenuator, a fourth filter, a fifth filter, a second equalizer, a third amplifier, a third equalizer, a fourth amplifier, a third attenuator and a fifth amplifier which are connected in sequence. On the basis that the system structure is not greatly changed, the Ka wave band up-down frequency conversion module is additionally arranged, so that the whole machine system can obtain a higher working frequency spectrum range, and the efficiency of the whole machine system is improved.

Description

Technical Field

[0001] This application relates to the field of electronic countermeasure technology for radar transceiver systems, and particularly to a Ka-band up / down conversion system. Background Art

[0002] Existing up / down conversion systems are mostly used in radar, communication systems, navigation systems, etc., and the working frequency band range can cover from P-band to Ka-band. In radar systems, different carrier frequencies correspond to different working fields and functions.

[0003] Generally speaking, the higher the radar carrier frequency, the higher the available instantaneous working bandwidth, and then the corresponding resolution is also higher, which can effectively identify "low, small, slow" targets. In the field of electronic countermeasures, broadband electronic systems can more effectively weaken and disrupt the enemy's use of the electromagnetic spectrum, while protecting our effective use of the electromagnetic spectrum, enabling our various electronic devices and systems to fully exert their combat effectiveness. Therefore, for existing frequency conversion systems in the radar and countermeasure fields, especially those designed below 18 GHz, how to improve the working efficiency of the system is an important issue. Utility Model Content

[0004] A Ka-band up / down conversion system provided by this application adopts the following technical solutions:

[0005] A Ka-band up / down conversion system, characterized by comprising:

[0006] An up-conversion channel, including a first attenuator, a first filter, a second filter, a first amplifier, a first equalizer, a second amplifier, a third filter, a coupler, and a second attenuator connected in sequence;

[0007] A down-conversion channel, including a third attenuator, a fourth filter, a fifth filter, a second equalizer, a third amplifier, a third equalizer, a fourth amplifier, a third attenuator, and a fifth amplifier connected in sequence;

[0008] A local oscillator fundamental frequency generation circuit, including an internal crystal oscillator and a phase-locked loop;

[0009] A frequency multiplication power distribution and amplification circuit, including a sixth filter, a frequency multiplier, a seventh filter, and a power divider connected in sequence. The power divider is connected to an eighth filter and a ninth filter. The eighth filter is connected to a sixth amplifier, and the ninth filter is connected to a seventh amplifier; the sixth amplifier is connected between the first filter and the second filter, and the seventh amplifier is connected between the fourth filter and the fifth filter;

[0010] A power supply control and communication circuit, connected to the phase-locked loop.

[0011] In one embodiment, the up-conversion channel is used to convert an intermediate-frequency signal into a radio-frequency signal, and the down-conversion channel is used to convert a radio-frequency signal into an intermediate-frequency signal; wherein, the frequency range of the Ka-band radio-frequency signal is 32 GHz - 40 GHz, and the frequency range of the intermediate-frequency signal is 8 GHz - 16 GHz.

[0012] In one embodiment, the local oscillator fundamental frequency generation circuit generates a local oscillator drive fundamental frequency signal of 24 GHz.

[0013] A Ka-band up-down conversion system provided by an embodiment of the present disclosure can achieve the following technical effects:

[0014] On the basis of not making major changes to the system structure, by adding a Ka-band up-down conversion module, the entire machine system can obtain a higher operating frequency spectrum range, thereby improving the efficiency of the entire machine system.

[0015] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a Ka-band up-down conversion system provided by an embodiment of the present application.

[0017] Description of the reference numerals: 1. First attenuator; 2. First filter; 3. Second filter; 4. First amplifier; 5. First equalizer; 6. Second amplifier; 7. Third filter; 8. Coupler; 9. Second attenuator; 10. Third attenuator; 11. Fourth filter; 12. Fifth filter; 13. Second equalizer; 14. Third amplifier; 15. Third equalizer; 16. Fourth amplifier; 17. Third attenuator; 18. Fifth amplifier; 19. Phase-locked loop; 20. Sixth filter; 21. Frequency multiplier; 22. Seventh filter; 23. Power divider; 24. Eighth filter; 25. Ninth filter; 26. Sixth amplifier; 27. Seventh amplifier; 28. Power control communication circuit. Detailed Embodiments

[0018] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the following further elaborates on the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0020] The following is combined with Figure 1 This application is described in further detail.

[0021] A Ka-band up-down conversion system includes an up-conversion channel, a down-conversion channel, a local oscillator base frequency generating circuit, a frequency multiplication power division amplifier circuit and a power supply control communication circuit 28.

[0022] The up-conversion channel comprises a first attenuator 1, a first filter 2, a second filter 3, a first amplifier 4, a first equalizer 5, a second amplifier 6, a third filter 7, a coupler 8 and a second attenuator 9 which are connected in sequence.

[0023] In one embodiment, the up-conversion channel has a conversion gain of 0 dB, an in-band flatness of ±3 dB at full temperature, and a transmit-receive isolation greater than 40 dB.

[0024] The down-conversion channel includes a third attenuator 1710, a fourth filter 11, a fifth filter 12, a second equalizer 13, a third amplifier 14, a third equalizer 15, a fourth amplifier 16, a third attenuator 1710 and a fifth amplifier 18 which are connected in sequence.

[0025] In one embodiment, the down-conversion channel has a conversion gain of 0 dB, an in-band flatness of ±3 dB at full temperature, and a noise figure less than 6 dB.

[0026] The local oscillator baseband generation circuit includes an internal crystal oscillator and a phase-locked loop 19. The phase-locked loop 19 inside the local oscillator baseband generation circuit generates a 24 GHz baseband signal with an output power of +5 dBm.

[0027] The frequency multiplying power divider amplifier circuit includes a sixth filter 20, a frequency multiplier 21, a seventh filter 22 and a power divider 23 connected in sequence, the power divider 23 is connected to an eighth filter 24 and a ninth filter 25, the eighth filter 24 is connected to a sixth amplifier 26, and the ninth filter 25 is connected to a seventh amplifier 27; the sixth amplifier 26 is connected between the first filter 2 and the second filter 3, and the seventh amplifier 27 is connected between the fourth filter 11 and the fifth filter 12.

[0028] The frequency doubler 21 in the frequency doubling power splitting and amplifying circuit is a frequency doubler 21 that doubles the frequency. The input power drive level is 0 dBm. The sixth filter 20 and the seventh filter 22 corresponding to the respective frequencies are matched before and after frequency doubling to filter out spurious signals other than the local oscillator signal.

[0029] The power supply control and communication circuit 28 is connected to the phase-locked loop 19.

[0030] In one embodiment, the up-conversion channel is used to convert the intermediate frequency signal into a radio frequency signal, and the down-conversion channel is used to convert the radio frequency signal into an intermediate frequency signal; wherein, the frequency range of the Ka-band radio frequency signal is 32 GHz - 40 GHz, and the frequency range of the intermediate frequency signal is 8 GHz - 16 GHz.

[0031] In one embodiment, the local oscillator drive fundamental frequency signal generated by the local oscillator fundamental frequency generation circuit is 24 GHz.

[0032] The up-conversion channel up-converts the input intermediate frequency signal in the range of 8 GHz - 16 GHz to a radio frequency signal in the range of 32 GHz - 40 GHz for output. The down-conversion channel down-converts the radio frequency signal in the range of 32 - 40 GHz received by the antenna to an intermediate frequency signal in the range of 8 - 16 GHz for output. Both the up-conversion and down-conversion are single-mixing architectures. The local oscillator signal is 48 GHz, which is generated by frequency doubling and filtering of the internal crystal oscillator and the local oscillator drive fundamental frequency signal 24 GHz of the phase-locked loop 19 chip product. The power supply control and communication circuit 28 converts the external voltage into the voltages required by each internal functional circuit. The core of the control circuit is a microprocessor, which controls the phase-locked loop 19 chip through the SPI bus, and at the same time reads the current, voltage, temperature, and self-test status through the serial port or I / O port, and then transmits the data in the form of RS422 differential levels through the serial port conversion chip.

[0033] With the above structure, on the basis of not making major changes to the system structure, by adding the Ka-band up-conversion and down-conversion modules, the entire machine system can obtain a higher working frequency spectrum range, thereby improving the efficiency of the entire machine system.

[0034] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A Ka-band up / down conversion system, characterized in that, Comprising: An up-conversion channel, including a first attenuator, a first filter, a second filter, a first amplifier, a first equalizer, a second amplifier, a third filter, a coupler, and a second attenuator connected in sequence; A down-conversion channel, including a third attenuator, a fourth filter, a fifth filter, a second equalizer, a third amplifier, a third equalizer, a fourth amplifier, a third attenuator, and a fifth amplifier connected in sequence; A local oscillator fundamental frequency generation circuit, including an internal crystal oscillator and a phase-locked loop; A frequency multiplication power splitting and amplification circuit, including a sixth filter, a frequency multiplier, a seventh filter, and a power splitter connected in sequence. The power splitter is connected to an eighth filter and a ninth filter. The eighth filter is connected to a sixth amplifier, and the ninth filter is connected to a seventh amplifier. The sixth amplifier is connected between the first filter and the second filter, and the seventh amplifier is connected between the fourth filter and the fifth filter; A power supply control and communication circuit, connected to the phase-locked loop.

2. The Ka-band up / down conversion system according to claim 1, wherein: The up-conversion channel is used to convert an intermediate frequency signal into a radio frequency signal, and the down-conversion channel is used to convert a radio frequency signal into an intermediate frequency signal. Among them, the frequency range of the Ka-band radio frequency signal is 32 GHz - 40 GHz, and the frequency range of the intermediate frequency signal is 8 GHz - 16 GHz.

3. The Ka-band up / down conversion system according to claim 1, wherein: The local oscillator driving fundamental frequency signal generated by the local oscillator fundamental frequency generation circuit is 24 GHz.

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