X-band four-channel up-down frequency conversion assembly

Abstract

The utility model discloses an X-band four-channel up-and-down frequency conversion assembly, which comprises a down-conversion assembly, an up-conversion assembly and a frequency source, the down-conversion assembly comprises four groups of receiving channels, the up-conversion assembly comprises four groups of transmitting channels, and synthesis output is performed through a power divider; the frequency source part is composed of four frequency synthesizers and two dot frequency sources, the four frequency synthesizers and the two dot frequency sources respectively provide L01, L03, 100MHz local oscillators and 2.5 GHz clock signals, and eight paths of L02 are output after the 100MHz signals are subjected to power division. The component is compact in design, stable in performance and suitable for the field of X-band signal processing of radar, communication and the like, and the flexibility and efficiency of signal processing are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of microwave, especially a kind of X wave band 4 channel up-down frequency conversion assembly. BACKGROUND

[0002] In microwave communication system, up-down frequency conversion assembly is the key equipment to realize signal frequency conversion. Especially in the application of X wave band (8-12GHz), 4 channel up-down frequency conversion assembly needs to meet the requirements of high performance, high reliability and miniaturization. The existing technical solutions often have the problems of complex structure and low space utilization, resulting in the overall system not being compact and efficient enough. SUMMARY

[0003] The utility model aims at providing a kind of X wave band 4 channel up-down frequency conversion assembly integrated with three microwave units of transmitting and receiving and local oscillator, to realize the goal of high performance and miniaturization through ingenious design and reasonable space allocation.

[0004] The utility model aims at realizing as follows: a kind of X wave band 4 channel up-down frequency conversion assembly, including down conversion assembly, up conversion assembly, frequency source;

[0005] The down conversion assembly is composed of four groups of receiving channels, and the four groups of receiving channels are sequentially connected by a first bandpass filter, a first amplifier, a first programmable attenuator, a first frequency mixer, a second bandpass filter, a second amplifier, a second frequency mixer, a third bandpass filter, a third amplifier, a fourth bandpass filter, an equalizer and a second programmable attenuator;

[0006] The up conversion assembly is composed of four groups of transmitting channels, and the four groups of transmitting channels are combined into one output by a four-in-one power divider, and the four groups of transmitting channels are sequentially connected by a switch filter group, a fourth amplifier, a first programmable attenuator, a fifth amplifier, a first programmable attenuator, a third frequency mixer, a second filter, a sixth amplifier, a fourth frequency mixer, a first filter, a seventh amplifier, a low-pass filter and a single-pole single-throw switch;

[0007] The frequency source is composed of four frequency synthesizers and two point frequency sources;The two point frequency sources respectively output 100MHz local oscillator signals and 2.5GHz clock signals, and the 100MHz local oscillator signals are output as eight L02 channels by a power divider;The four frequency synthesizers output L01 and L03.

[0008] Preferably, the L01 and L03 output frequencies are 22-26GHz;The L02 output frequency is 15.85GHz.

[0009] Preferably, the receiving channel input frequency is 8-12GHz, the output frequency is 1.35-2.35GHz, the output channel input frequency is 1.35-2.35GHz, and the output frequency is 8-12GHz.

[0010] Preferably, the first mixer access signal is L01 or L03, the second mixer access signal is L02, and the third mixer access signal is L01.

[0011] Preferably, each of the frequency synthesizers is composed of a frequency multiplier, a filter, a first power divider, and a second power divider, the first power divider outputs two paths, one of which is connected with a single-pole four-throw switch, and the other of which is connected with the second power divider, and the second power divider outputs two paths L01.

[0012] Preferably, the single-pole four-throw switch is connected with a power divider through an amplifier and outputs four paths L03.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] 1. Three micro unit structures including transmitting, receiving and local oscillator are reasonably distributed in space. Overall, the design is ingenious and the space design is reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The flowchart of the down-conversion assembly of the utility model is shown.

[0016] Figure 2 The flowchart of the up-conversion assembly of the utility model is shown.

[0017] Figure 3 The flowchart of the frequency source of the utility model is shown. DETAILED DESCRIPTION

[0018] The embodiments of the utility model are described below by specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the disclosed content.

[0019] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1 As shown, an X-band 4-channel up-conversion component includes an up-conversion component, an up-conversion component, and a frequency source.

[0022] The downconversion component consists of four receiving channels. Each of the four receiving channels is composed of a first bandpass filter, a first amplifier, a first programmable attenuator, a first mixer, a second bandpass filter, a second amplifier, a second mixer, a third bandpass filter, a third amplifier, a fourth bandpass filter, an equalizer, and a second programmable attenuator connected in series. The series connection of multiple filters, amplifiers, programmable attenuators, and mixers in each of the four receiving channels ensures high-quality signal reception and processing. The use of multiple filters effectively removes noise and interference, improving the signal-to-noise ratio. Simultaneously, the use of programmable attenuators allows for flexible adjustment of the signal gain to accommodate input signals of varying strengths.

[0023] The up-conversion assembly is composed of four groups of transmitting channels, the four groups of transmitting channels are combined into one output through a four-in-one power divider, and the four groups of transmitting channels are composed of a switch filter group, a fourth amplifier, a first program-controlled attenuator, a fifth amplifier, a first program-controlled attenuator, a third mixer, a second filter, a sixth amplifier, a fourth mixer, a first filter, a seventh amplifier, a low-pass filter and a single-pole single-throw switch in sequence; the four groups of transmitting channels are combined into one output through a four-in-one power divider, so that the stability and efficient transmission of signals are ensured; in the transmitting channel, filters, amplifiers and mixers are connected in series, so that high-quality signal transmission is ensured, and through the use of the four-in-one power divider, power combination of signals is realized, and output power and efficiency are improved.

[0024] The frequency source is composed of four frequency synthesizers and two point frequency sources; the two point frequency sources respectively output 100MHz local oscillator signals and 2.5GHz clock signals, the 100MHz local oscillator signals are output through a power divider to obtain eight L02s; the four frequency synthesizers output L01s and L03s.

[0025] The output frequencies of the L01s and the L03s are 22-26GHz; the output frequency of the L02 is 15.85GHz.

[0026] The input frequency of the receiving channel is 8-12GHz, the output frequency is 1.35-2.35GHz, the input frequency of the output channel is 1.35-2.35GHz, and the output frequency is 8-12GHz.

[0027] The input signal of the first mixer is L01 or L03, the input signal of the second mixer is L02, and the input signal of the third mixer is L01.

[0028] Each frequency synthesizer is composed of a frequency multiplier, a filter, a first power divider and a second power divider, the first power divider outputs two paths, one path is connected with a single-pole four-throw switch, and the other path is connected with the second power divider, the second power divider outputs two L01s.

[0029] The single-pole four-throw switch is connected with a power divider through an amplifier and outputs four L03s.

[0030] The working principle of the utility model is described as follows:

[0031] Down conversion assembly: the receiving channel receives 8-12GHz X-band microwave signal, the signal is filtered by the first band-pass filter first, removes the noise and interference, then is amplified by the first amplifier, the first programmable attenuator attenuates according to the signal strength to protect the subsequent circuit from being damaged, the signal enters the first mixer and is mixed with the L01 or L03 (22-26GHz) local oscillator signal provided by the frequency source, generates an intermediate frequency signal, after the intermediate frequency signal is filtered by the second band-pass filter and amplified by the second amplifier, the signal is mixed with the L02 (15.85GHz) local oscillator signal in the second mixer, generates a lower frequency intermediate frequency signal, after the signal is filtered by the third band-pass filter and amplified by the third amplifier, the signal is amplitude equalized by the equalizer to ensure the signal quality, finally, the signal is adjusted in amplitude by the second programmable attenuator, and 1.35-2.35GHz low frequency signal is output.

[0032] Up conversion assembly: the transmitting channel receives 1.35-2.35GHz low frequency signal, the signal is filtered by the switch filter set first, then is amplified by the fourth amplifier, the first programmable attenuator attenuates according to the signal strength, the signal enters the third mixer and is mixed with the L02 local oscillator signal, generates an intermediate frequency signal, after the intermediate frequency signal is amplified by the fifth amplifier and adjusted by the second programmable attenuator, the signal is mixed with the L01 in the fourth mixer, generates a high frequency signal, after the high frequency signal is filtered and amplified by the first filter, the sixth amplifier and the second filter, the signal is finally amplified by the seventh amplifier, the signal is removed by the low-pass filter, and finally the signal is selected and output by the single-pole single-throw switch, and an 8-12GHz X-band microwave signal is synthesized;

[0033] The down conversion assembly and the up conversion assembly are converted by ADC (analog-to-digital converter) and DAC (digital-to-analog converter).

[0034] The specific indexes of the utility model are as follows,

[0035] Down conversion channel index: input frequency range: 8-12GHz; output frequency range: 1.35-2.35GHz; input power: -60-0dBm; Ps≤10dBm; P-1≥5dBm; channel gain: ≥30dB; in-band fluctuation: ≤±2dB; spurious suppression: ≤-43dBm; gain adjustment range: ≥60dB, step 1dB (four single controllable) ;

[0036] Up conversion channel index: input frequency range: 1.35-2.35GHz; output frequency range: 8-12GHz; input power: -10±2dBm; output power: 15±3dBm; spurious suppression: ≥60dBc (narrow), ≥50dBc (wide); power management: 0-60dB (step 1dB).

[0037] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the concept and scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design concept of the present application shall fall within the protection scope of the present application, and the technical content of the present application claimed for protection has been entirely recorded in the claims.

Claims

1. An X-band 4-channel up-down conversion assembly, characterized by, The down-conversion component, the up-conversion component and the frequency source; The down-conversion component is composed of four groups of receiving channels, each of which is composed of a first band-pass filter, a first amplifier, a first programmable attenuator, a first mixer, a second band-pass filter, a second amplifier, a second mixer, a third band-pass filter, a third amplifier, a fourth band-pass filter, an equalizer and a second programmable attenuator connected in series. The up-conversion component is composed of four groups of transmitting channels, which are combined into one output through a four-in-one power divider, and each of the four groups of transmitting channels is composed of a switch filter group, a fourth amplifier, a first programmable attenuator, a fifth amplifier, a first programmable attenuator, a third mixer, a second filter, a sixth amplifier, a fourth mixer, a first filter, a seventh amplifier, a low-pass filter and a single-pole single-throw switch connected in series. The frequency source is composed of four frequency synthesizers and two point frequency sources; the two point frequency sources respectively output 100MHz local oscillator signals and 2.5GHz clock signals, and the 100MHz local oscillator signals are output through a power divider to generate eight L02 signals; the four frequency synthesizers output L01 and L03 signals.

2. The X-band 4-channel up-down conversion assembly of claim 1, wherein, The output frequency of the L01 and L03 signals is 22-26GHz, and the output frequency of the L02 signal is 15.85GHz.

3. The X-band 4-channel up-down converter assembly of claim 1, wherein, The input frequency of the receiving channel is 8-12GHz, and the output frequency is 1.35-2.35GHz; the input frequency of the output channel is 1.35-2.35GHz, and the output frequency is 8-12GHz.

4. The X-band 4-channel up-down conversion assembly of claim 1, wherein, The first mixer is connected to the L01 or L03 signal, the second mixer is connected to the L02 signal, and the third mixer is connected to the L01 signal.

5. The X-band 4-channel up-down converter assembly of claim 1, wherein, Each frequency synthesizer is composed of a frequency multiplier, a filter, a first power divider and a second power divider, the first power divider outputs two paths, one of which is connected to a single-pole four-throw switch, and the other of which is connected to the second power divider, and the second power divider outputs two L01 signals.

6. The X-band 4-channel up-down conversion assembly of claim 5, wherein, The single-pole four-throw switch is connected to an amplifier and a power divider and outputs four L03 signals.

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