Broadband high-speed frequency hopping frequency conversion assembly

Abstract

The utility model discloses a broadband high-speed frequency hopping frequency conversion assembly, and relates to the field of wireless communication. The system comprises a first switch circuit, first to fifth frequency conversion circuits, a first low-pass filter, a second low-pass filter, a first frequency hopping source, a first local oscillator source, a second local oscillator source, a first attenuator, a second attenuator, a second switch circuit and a third local oscillator source. According to the utility model, functions of small stepping and rapid frequency hopping can be realized in a broadband working frequency range crossing multiple octaves, and characteristics of low cost, small size and wide application range are possessed. The application range of different types of communication systems is expanded, and the anti-interference capability and the reliability of the wireless communication system are improved through the high-local-oscillator rapid frequency hopping function.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless communication field especially refers to a kind of broadband high-speed frequency hopping frequency conversion assembly. BACKGROUND

[0002] In modern wireless communication system, the application of frequency conversion assembly with broadband high-speed frequency hopping function is more and more widely. Fast frequency hopping makes wireless communication have good anti-interference ability, and has wide application scenarios in various radar communication, microwave photon communication. The broadband frequency hopping frequency conversion module with working frequency across multiple frequency ranges further expands the application range of communication system. At present, broadband frequency converter across multiple frequency ranges is based on different communication system requirements, more is to combine independent modules such as frequency hopping local oscillator module, broadband frequency conversion module, resulting in the overall assembly is electronic instrument and equipment, large size, high cost. UTILITY MODEL CONTENT

[0003] Therefore, the utility model provides a broadband high-speed frequency hopping frequency conversion assembly. The assembly has the function of realizing small step, fast frequency hopping in broadband working frequency range across multiple frequency ranges, has the characteristics of low cost, small size and wide range of use. It expands the application range of different types of communication systems, and the high local oscillator fast frequency hopping function improves the anti-interference ability and reliability of wireless communication system.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A broadband high-speed frequency hopping frequency conversion assembly, comprising a first switch circuit, a first frequency conversion circuit to a fifth frequency conversion circuit, a first low-pass filter, a second low-pass filter, a first frequency hopping source, a first local oscillator source, a second local oscillator source, a first attenuator, a second attenuator, a second switch circuit and a third local oscillator source.

[0006] The common port of the first switch circuit receives or transmits radio frequency signal, the first branch port of the first switch circuit is connected with the first input / output port of the first frequency conversion circuit, the second input / output port of the first frequency conversion circuit is connected with the first input / output port of the first low-pass filter, the second input / output port of the first low-pass filter is connected with the first input / output port of the third frequency conversion circuit, the second input / output port of the third frequency conversion circuit is connected with the first input / output port of the first attenuator, and the second input / output port of the first attenuator is connected with the first branch port of the second switch circuit.

[0007] The second branch port of the first switch circuit is connected with the first input / output port of the second frequency conversion circuit, the second input / output port of the second frequency conversion circuit is connected with the first input / output port of the second low pass filter, the second input / output port of the second low pass filter is connected with the first input / output port of the fourth frequency conversion circuit, the second input / output port of the fourth frequency conversion circuit is connected with the first input / output port of the second attenuator, and the second input / output port of the second attenuator is connected with the second branch port of the second switch circuit.

[0008] The first low pass filter, the second low pass filter, the first attenuator and the second attenuator are transceiving bidirectional devices.

[0009] The first output port of the first frequency hopping source is connected with the local oscillator input port of the first frequency conversion circuit, and the second output port of the first frequency hopping source is connected with the local oscillator input port of the second frequency conversion circuit.

[0010] The output port of the first local oscillator source is connected with the local oscillator input port of the third frequency conversion circuit, and the output port of the second local oscillator source is connected with the local oscillator input port of the fourth frequency conversion circuit.

[0011] The common port of the second switch circuit is connected with the first input / output port of the fifth frequency conversion circuit, and the second input / output port of the fifth frequency conversion circuit transmits or receives an intermediate frequency signal.

[0012] The output port of the third local oscillator source is connected with the local oscillator input port of the fifth frequency conversion circuit.

[0013] Further, the first frequency conversion circuit to the fifth frequency conversion circuit all include a bidirectional amplifier, a band pass filter and a frequency mixer; the bidirectional amplifier, the band pass filter and the frequency mixer are transceiving bidirectional devices.

[0014] The second input / output port of the bidirectional amplifier is connected with the first input / output port of the band pass filter, the second input / output port of the band pass filter is connected with the first input / output port of the frequency mixer; the local oscillator input port of the frequency mixer is the local oscillator input port of the corresponding frequency conversion circuit.

[0015] For the first frequency conversion circuit and the second frequency conversion circuit, the first input / output port of the bidirectional amplifier is the first input / output port of the corresponding frequency conversion circuit, and the second input / output port of the frequency mixer is the second input / output port of the corresponding frequency conversion circuit.

[0016] For the third frequency conversion circuit to the fifth frequency conversion circuit, the first input / output port of the bidirectional amplifier is the second input / output port of the corresponding frequency conversion circuit, and the second input / output port of the frequency mixer is the first input / output port of the corresponding frequency conversion circuit.

[0017] Further, the first frequency hopping source comprises a first frequency hopping local oscillator signal, a second frequency hopping local oscillator signal, a first frequency hopping switch circuit, a four times frequency multiplier, a second frequency hopping switch circuit;

[0018] The first frequency hopping local oscillator signal and the second frequency hopping local oscillator signal are connected with a first branch port and a second branch port of the first frequency hopping switch circuit respectively;

[0019] A common port of the first frequency hopping switch circuit is connected with an input port of the four times frequency multiplier, and an output port of the four times frequency multiplier is connected with a common port of the second frequency hopping switch circuit;

[0020] A first branch port and a second branch port of the second frequency hopping switch circuit are a first output port and a second output port of the first frequency hopping source respectively.

[0021] Further, the first local oscillator source comprises a first local oscillator signal and a first two times frequency multiplier, the first local oscillator signal is connected with an input port of the first two times frequency multiplier, and an output port of the first two times frequency multiplier is an output port of the first local oscillator source;

[0022] The second local oscillator source comprises a second local oscillator signal and a second two times frequency multiplier, the second local oscillator signal is connected with an input port of the second two times frequency multiplier, and an output port of the second two times frequency multiplier is an output port of the second local oscillator source.

[0023] Further, the third local oscillator source comprises a third local oscillator signal, a fourth local oscillator signal and a local oscillator switch circuit;

[0024] The third local oscillator signal and the fourth local oscillator signal are connected with a first branch port and a second branch port of the local oscillator switch circuit respectively;

[0025] A common port of the local oscillator switch circuit is an output port of the third local oscillator source.

[0026] Compared with the prior art, the utility model has the beneficial effects that:

[0027] 1. The utility model contains multiple frequency conversion circuits, which convert the entire 4-16GHz wideband radio frequency signal across multiple frequency conversion ranges to an intermediate frequency signal, and convert the fixed intermediate frequency signal to a wideband radio frequency signal across 4 frequency conversion ranges, thereby realizing the transmission and reception frequency conversion function of the ultra-wideband 12GHz signal.

[0028] 2. The utility model contains a group of wideband high-speed high local oscillator frequency hopping circuits and three fixed local oscillator circuits, which realize the frequency hopping anti-interference function of the entire wideband frequency conversion module.

[0029] 3. The utility model contains a highly integrated wideband frequency conversion circuit across multiple frequency conversion ranges, which greatly reduces the size of the wideband frequency conversion assembly, widens the application range and saves the volume.

[0030] 4. The utility model discloses two groups of switching circuit and four variable frequency circuits for switching different frequency bands to realize wide-band high-quality and low-stray variable frequency functions. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the principle block diagram of a kind of wideband high-speed frequency hopping variable frequency assembly in the utility model embodiment.

[0032] Figure 2 It is the circuit principle diagram of a kind of wideband high-speed frequency hopping variable frequency assembly in the utility model embodiment. DETAILED DESCRIPTION

[0033] The content of the utility model is further explained in conjunction with the drawings and specific embodiments.

[0034] A kind of wideband high-speed frequency hopping variable frequency assembly, as shown in Figure 1 It includes first switching circuit, first variable frequency circuit~fifth variable frequency circuit, first low pass filter, second low pass filter, first frequency hopping source, first local oscillator source, second local oscillator source, first attenuator, second attenuator, second switching circuit and third local oscillator source;

[0035] The common port of the first switching circuit receives or emits radio frequency signal, the first branch port of first switching circuit is connected the first input / output port of first variable frequency circuit, the second input / output port of first variable frequency circuit is connected the first input / output port of first low pass filter, the second input / output port of first low pass filter is connected the first input / output port of third variable frequency circuit, the second input / output port of third variable frequency circuit is connected the first input / output port of first attenuator, the second input / output port of first attenuator is connected the first branch port of second switching circuit;

[0036] The second branch port of first switching circuit is connected the first input / output port of second variable frequency circuit, the second input / output port of second variable frequency circuit is connected the first input / output port of second low pass filter, the second input / output port of second low pass filter is connected the first input / output port of fourth variable frequency circuit, the second input / output port of fourth variable frequency circuit is connected the first input / output port of second attenuator, the second input / output port of second attenuator is connected the second branch port of second switching circuit;

[0037] The first low pass filter, second low pass filter, first attenuator and second attenuator are all transceiving bidirectional devices;

[0038] The first output port of first frequency hopping source is connected the local oscillator input of first variable frequency circuit, the second output port of first frequency hopping source is connected the local oscillator input of second variable frequency circuit;

[0039] The output port of the first local oscillator source is connected to the local oscillator input port of the third frequency conversion circuit, and the output port of the second local oscillator source is connected to the local oscillator input port of the fourth frequency conversion circuit.

[0040] The common port of the second switch circuit is connected to the first input / output port of the fifth frequency conversion circuit, and the second input / output port of the fifth frequency conversion circuit transmits or receives an intermediate frequency signal.

[0041] The output port of the third local oscillator source is connected to the local oscillator input port of the fifth frequency conversion circuit.

[0042] Further, as shown in the figure, Figure 2 The first frequency conversion circuit to the fifth frequency conversion circuit each include a bidirectional amplifier, a bandpass filter, and a frequency mixer; the bidirectional amplifier, the bandpass filter, and the frequency mixer are all transceiving bidirectional devices.

[0043] The second input / output port of the bidirectional amplifier is connected to the first input / output port of the bandpass filter, and the second input / output port of the bandpass filter is connected to the first input / output port of the frequency mixer; the local oscillator input port of the frequency mixer is the local oscillator input port of the corresponding frequency conversion circuit.

[0044] For the first frequency conversion circuit and the second frequency conversion circuit, the first input / output port of the bidirectional amplifier is the first input / output port of the corresponding frequency conversion circuit, and the second input / output port of the frequency mixer is the second input / output port of the corresponding frequency conversion circuit.

[0045] For the third frequency conversion circuit to the fifth frequency conversion circuit, the first input / output port of the bidirectional amplifier is the second input / output port of the corresponding frequency conversion circuit, and the second input / output port of the frequency mixer is the first input / output port of the corresponding frequency conversion circuit.

[0046] Specifically, in the embodiment, the first frequency conversion circuit, the first low-pass filter, the third frequency conversion circuit, and the first attenuator work in a low-frequency band interval; the second frequency conversion circuit, the second low-pass filter, the fourth frequency conversion circuit, and the second attenuator work in a high-frequency band interval.

[0047] Further, as shown in the figure, Figure 2 The first frequency hopping source includes a first frequency hopping local oscillator signal, a second frequency hopping local oscillator signal, a first frequency hopping switch circuit, a four times frequency multiplier, and a second frequency hopping switch circuit.

[0048] The first frequency hopping local oscillator signal and the second frequency hopping local oscillator signal are respectively connected to the first branch port and the second branch port of the first frequency hopping switch circuit.

[0049] The common port of the first frequency hopping switch circuit is connected to the input port of the quadruple frequency multiplier, and the output port of the quadruple frequency multiplier is connected to the common port of the second frequency hopping switch circuit.

[0050] The first branch port and the second branch port of the second frequency hopping switch circuit are the first output port and the second output port of the first frequency hopping source, respectively.

[0051] Furthermore, such as Figure 2 As shown, the first local oscillator source includes a first local oscillator signal and a first frequency multiplier. The first local oscillator signal is connected to the input port of the first frequency multiplier, and the output port of the first frequency multiplier is the output port of the first local oscillator source.

[0052] The second local oscillator source includes a second local oscillator signal and a second frequency multiplier. The second local oscillator signal is connected to the input port of the second frequency multiplier, and the output port of the second frequency multiplier is the output port of the second local oscillator source.

[0053] Furthermore, such as Figure 2 As shown, the third local oscillator source includes a third local oscillator signal, a fourth local oscillator signal, and a local oscillator switching circuit;

[0054] The third local oscillator signal and the fourth local oscillator signal are respectively connected to the first branch port and the second branch port of the local oscillator switching circuit;

[0055] The common port of the local oscillator switching circuit is also the output port of the third local oscillator source.

[0056] The circuit of this invention can operate in both up-conversion and down-conversion modes.

[0057] The frequency conversion circuits 1, 2, 3, 4, and 5 of this invention provide frequency conversion channels for two high- and low-frequency radio frequency signals, respectively. When the system operates as a receiving module, the radio frequency signal is input to the module's radio frequency port. The signal passes through the switching circuit and enters the corresponding frequency conversion channel and filtering channel, realizing the down-conversion function of the broadband signal. When the system operates as a transmitting module, the intermediate frequency signal is input to the module's intermediate frequency port. The intermediate frequency signal first undergoes one frequency conversion, and then passes through the switching circuit to enter the corresponding frequency conversion channel and filtering channel, realizing the up-conversion function of the broadband signal.

[0058] The working principle of this utility model is as follows:

[0059] The working principle of the broadband high-speed frequency hopping converter component for wireless broadband signal communication in this utility model is as follows: Figure 2When the component works as a down-conversion component, a broadband radio frequency signal sent from outside passes through a switch circuit to select high frequency band and low frequency band conversion circuit, and frequency hopping works in ping-pong frequency conversion. The high frequency signal after once frequency conversion passes through a high band filter, and enters twice frequency conversion to convert the signal to a fixed low intermediate frequency frequency; for the low frequency band, the same frequency conversion link is performed twice, and the low frequency band filter filters out the low frequency band signal, and finally the switch circuit switches to the last frequency conversion to a fixed low intermediate frequency frequency output.

[0060] When the component works as an up-conversion component, an intermediate frequency signal sent from outside passes through once up-conversion to two different high intermediate frequency frequencies, and passes through a switch circuit to select twice up-conversion to convert the high frequency signal, and then passes through high and low frequency band filters to filter out the used frequency band. Finally, after the last frequency conversion to the corresponding working frequency band, the radio frequency signal is output through the switch circuit.

[0061] The frequency hopping function of the above broadband frequency conversion component is realized by using ping-pong frequency hopping function at radio frequency. In order to realize frequency hopping function in a range of three times frequency, 12GHz bandwidth, the frequency hopping source adopts four times frequency local oscillator frequency, and the ping-pong frequency hopping mode is realized. The frequency hopping source works with high local oscillator, which increases the design difficulty of the frequency source, but because the frequency hopping range is widened, the anti-interference ability of the whole frequency conversion component is enhanced. In order to avoid the spurious signal generated by broadband frequency conversion falling into the working frequency band, three times frequency conversion is adopted to realize high quality output of the frequency conversion signal. The difficulty of circuit design is increased, and more reasonable frequency planning and circuit design are needed, combined with advanced assembly level to realize broadband frequency conversion function and widen the use scene of the whole component.

[0062] In summary, the utility model has the function of realizing small step, fast frequency hopping in the broadband working frequency range of multiple frequency conversion, has the characteristics of low cost, small size, wide use range. It expands the application range of different types of communication systems, and the high local oscillator fast frequency hopping function improves the anti-interference ability and reliability of the wireless communication system.

[0063] Those skilled in the art will appreciate that the embodiments described are to assist the reader in understanding the principles of the utility model and should be understood as the scope of protection of the utility model is not limited to the embodiments described. The utility model can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the scope of claims of the utility model.

Claims

1. A wideband high-speed frequency hopping frequency conversion assembly, comprising: The first switch circuit, the first to fifth frequency conversion circuits, the first low-pass filter, the second low-pass filter, the first frequency hopping source, the first local oscillator source, the second local oscillator source, the first attenuator, the second attenuator, the second switch circuit, and the third local oscillator source are included. The common port of the first switch circuit receives or transmits a radio frequency signal, the first branch port of the first switch circuit is connected to the first input / output port of the first frequency conversion circuit, the second input / output port of the first frequency conversion circuit is connected to the first input / output port of the first low-pass filter, the second input / output port of the first low-pass filter is connected to the first input / output port of the third frequency conversion circuit, the second input / output port of the third frequency conversion circuit is connected to the first input / output port of the first attenuator, and the second input / output port of the first attenuator is connected to the first branch port of the second switch circuit. The second branch port of the first switch circuit is connected to the first input / output port of the second frequency conversion circuit, the second input / output port of the second frequency conversion circuit is connected to the first input / output port of the second low-pass filter, the second input / output port of the second low-pass filter is connected to the first input / output port of the fourth frequency conversion circuit, the second input / output port of the fourth frequency conversion circuit is connected to the first input / output port of the second attenuator, and the second input / output port of the second attenuator is connected to the second branch port of the second switch circuit. The first low-pass filter, the second low-pass filter, the first attenuator, and the second attenuator are transceiving bidirectional devices. The first output port of the first frequency hopping source is connected to the local oscillator input port of the first frequency conversion circuit, and the second output port of the first frequency hopping source is connected to the local oscillator input port of the second frequency conversion circuit. The output port of the first local oscillator source is connected to the local oscillator input port of the third frequency conversion circuit, and the output port of the second local oscillator source is connected to the local oscillator input port of the fourth frequency conversion circuit. The common port of the second switch circuit is connected to the first input / output port of the fifth frequency conversion circuit, and the second input / output port of the fifth frequency conversion circuit transmits or receives an intermediate frequency signal. The output port of the third local oscillator source is connected to the local oscillator input port of the fifth frequency conversion circuit.

2. A wideband high-speed frequency hopping transducer assembly according to claim 1, characterized in that, The first to fifth frequency conversion circuits each include a bidirectional amplifier, a band-pass filter, and a frequency mixer; the bidirectional amplifier, the band-pass filter, and the frequency mixer are transceiving bidirectional devices. The second input / output port of the bidirectional amplifier is connected to the first input / output port of the band-pass filter, and the second input / output port of the band-pass filter is connected to the first input / output port of the frequency mixer; the local oscillator input port of the frequency mixer is the local oscillator input port of the corresponding frequency conversion circuit. For the first frequency conversion circuit and the second frequency conversion circuit, the first input / output port of the bidirectional amplifier is the first input / output port of the corresponding frequency conversion circuit, and the second input / output port of the frequency mixer is the second input / output port of the corresponding frequency conversion circuit. For the third to fifth frequency conversion circuits, the first input / output port of the bidirectional amplifier is the second input / output port of the corresponding frequency conversion circuit, and the second input / output port of the frequency mixer is the first input / output port of the corresponding frequency conversion circuit.

3. The wideband high-speed frequency hopping transducer assembly of claim 1, wherein, The first frequency hopping source comprises a first frequency hopping local oscillator signal, a second frequency hopping local oscillator signal, a first frequency hopping switch circuit, a four times frequency multiplier, and a second frequency hopping switch circuit; The first frequency hopping local oscillator signal and the second frequency hopping local oscillator signal are respectively connected to a first branch port and a second branch port of the first frequency hopping switch circuit; A common port of the first frequency hopping switch circuit is connected to an input port of the four times frequency multiplier, and an output port of the four times frequency multiplier is connected to a common port of the second frequency hopping switch circuit; A first branch port and a second branch port of the second frequency hopping switch circuit are respectively a first output port and a second output port of the first frequency hopping source.

4. The wideband high-speed frequency hopping transducer assembly of claim 1, wherein, The first local oscillator source comprises a first local oscillator signal and a first two times frequency multiplier, the first local oscillator signal is connected to an input port of the first two times frequency multiplier, and an output port of the first two times frequency multiplier is an output port of the first local oscillator source; The second local oscillator source comprises a second local oscillator signal and a second two times frequency multiplier, the second local oscillator signal is connected to an input port of the second two times frequency multiplier, and an output port of the second two times frequency multiplier is an output port of the second local oscillator source.

5. The wideband high-speed frequency hopping transducer assembly of claim 1, wherein, The third local oscillator source comprises a third local oscillator signal, a fourth local oscillator signal, and a local oscillator switch circuit; The third local oscillator signal and the fourth local oscillator signal are respectively connected to a first branch port and a second branch port of the local oscillator switch circuit; A common port of the local oscillator switch circuit is an output port of the third local oscillator source.

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