CN202797193U - Microwave switch matrix for testing radio-frequency signal - Google Patents

Abstract

The utility model discloses a microwave switch matrix for testing a radio-frequency signal. The microwave switch matrix disclosed by the utility model is different from the traditional switch matrix. A band-pass filter and a broadband microwave device are separately designed, so that the microwave switch matrix can have interchangeability when satellites at different frequency ranges are tested, and the functions of filtering, branching, combining and the like relevant to the frequency point and channel of the specific tested satellite are finished by a radio-frequency interface unit. The microwave switch matrix reduces the volume of the device, improves the reliability of the device, reduces the cost of a ground device when a plurality of satellites are tested, has the characteristics of generality and miniaturization, achieves the generality between the devices in batch production test of navigational satellites, and also can be suitable for a test of measuring and controlling other models of spacecrafts.

Description

A kind of radiofrequency signal test microwave switching matrix

Technical field

The utility model relates to a kind of observing and controlling switch matrix of general and dedicated separation, relates in particular to a kind of radiofrequency signal test and uses microwave switching matrix, belongs to communication technical field.

Background technology

The observing and controlling switch matrix has very important effect in spacecraft observing and controlling test macro.Traditional switch matrix is mainly finished the functions such as the power control, passage switching, filtering shunt, mixing of satellite up-downgoing radiofrequency signal, the general microwave component of existing introduction, the special-purpose member relevant with the specific model mission frequency also arranged, do not realize the separation of general/special function, like this after a model task is finished, in order to adapt to the new task needs, complete machine must again return repair in shop and change (the particularly special module relevant with frequency), so equipment volume is large, poor reliability, and does not possess the requirement of versatility and miniaturization.

The utility model content

Technology of the present utility model is dealt with problems and is: the deficiency that overcomes the conventional switch matrix, a kind of radiofrequency signal test microwave switching matrix has been proposed, the utility model adopts split-type structural, has reduced equipment volume, has improved the reliability of equipment, the cost of ground installation when having reduced many stars tests.

Technical solution of the present utility model is: microwave switching matrix is used in a kind of radiofrequency signal test, is comprised of general module and radio frequency interface module, and wherein general module comprises data feedback channel and down going channel;

Data feedback channel is by up splitter, up programmable attenuator, out-hole run and self-test switch, up switch and attenuator driver and 70MHz switch form, out-hole run and self-correcting input signal are divided into two-way through up splitter, row is measured with the self-correcting input signal and is used to carry out spectral monitoring on the way, another road out-hole run and self-correcting input signal enter up programmable attenuator, the attenuation of up switch and the up programmable attenuator of attenuator driver control, out-hole run after overdamping and self-correcting input signal enter out-hole run and self-check key, up switch and attenuator driver control out-hole run and self-check key output self-correcting signal or measuring-signal, up switch is exported a road in the up 70MHz radiofrequency signal of two-way with decay driver control 70MHz switch;

Down going channel is by descending splitter, descending programmable attenuator, down-run survey and self-test switch, downing switch and attenuator driver and downstream signal switch form, downing switch and attenuator driver control down-run survey and self-check key input self-correcting signal or measuring-signal, self-correcting signal or measuring-signal are divided into two-way through descending splitter, one tunnel self-correcting signal or measuring-signal are used to carry out spectral monitoring, another road self-correcting signal or measuring-signal enter descending programmable attenuator, the attenuation of downing switch and the descending programmable attenuator of attenuator driver control, self-correcting signal or measuring-signal after overdamping are exported by descending programmable attenuator, and downing switch is exported a road in the different frequency downlink radio-frequency signal with decay driver control downstream signal switch;

Radio frequency interface module is by splitter, the first filtering splitter, the second filtering splitter, the 70MHz filter, threeway and mixer form, one tunnel descending synthetic input radiofrequency signal is divided into two-way through splitter, wherein one tunnel descending synthetic input radiofrequency signal is divided into the radiofrequency signal output of three road different frequencies through the first filtering splitter, the descending synthetic input radiofrequency signal in another road is divided into the radiofrequency signal output of three road different frequencies through the second filtering splitter, the 70MHz input signal is exported behind the 70MHz filter filtering, the 10MHz input signal is divided into the output of three road 10MHz signals through threeway, and two-way synthetic input signal is through synthetic one road signal output of mixer.

The utility model beneficial effect compared with prior art is: the utility model is different from traditional switch matrix, band pass filter and wideband microwave device are separated design, so that the wide-band microwave switch matrix can have interchangeability when the different frequency range satellite test, again by the radio frequency interface unit finish the filtering relevant with specific tested satellite frequency, port number, along separate routes, close the functions such as road.The utility model has reduced equipment volume, improved the reliability of equipment, the cost of ground installation possesses versatility and miniaturization characteristics when having reduced many star tests, criticize to produce in the test at navigation satellite and realized the general of equipment room, and also use applicable to other model spacecraft observing and controlling tests.The utility model with the observing and controlling switch matrix general/dedicated separation design, be about to the general utility functionss such as power control, passage switching and partly separate and make the universal switch matrix, can adapt to the observing and controlling test assignment of various models; With independent the make special-purpose radio-frequency interface units such as filter relevant with the specific model mission frequency, thereby reduced equipment volume, improved the reliability of equipment, the cost of ground installation when having reduced many star tests, realized versatility and the miniaturization requirement of test macro, be applicable to navigation satellite and criticize the product test pattern.

Description of drawings

Fig. 1 is the theory of constitution block diagram of general module in the utility model switch matrix;

Fig. 2 is the theory of constitution block diagram of radio frequency interface module in the utility model switch matrix.

Embodiment

The utility model is comprised of general module and radio frequency interface module, general module comprises that two passages realizations of uplink and downlink are to gain control and the channel selecting of radio frequency uplink and downlink signal, as shown in Figure 1, radio frequency interface module realizes fixed intermediate frequency filtering or rf filtering, and the shunt that signal is provided closes the road function, as shown in Figure 2.

Data feedback channel is by up splitter, up programmable attenuator, out-hole run and self-test switch, up switch and attenuator driver and 70MHz switch form, out-hole run and self-correcting input signal are divided into two-way through up splitter, row is measured with the self-correcting input signal and is used to carry out spectral monitoring on the way, another road out-hole run and self-correcting input signal enter up programmable attenuator, the attenuation of up switch and the up programmable attenuator of attenuator driver control, out-hole run after overdamping and self-correcting input signal enter out-hole run and self-check key, the defeated self-correcting signal of up switch and attenuator driver control out-hole run and self-check key or measuring-signal, up switch is exported a road in the up 70MHz radiofrequency signal of two-way with decay driver control 70MHz switch;

Down going channel is by descending splitter, descending programmable attenuator, down-run survey and self-test switch, downing switch and attenuator driver and downstream signal switch form, downing switch and attenuator driver control down-run survey and self-check key input self-correcting signal or measuring-signal, self-correcting signal or measuring-signal are divided into two-way through descending splitter, one tunnel self-correcting signal or measuring-signal are used to carry out spectral monitoring, another road self-correcting signal or measuring-signal enter descending programmable attenuator, the attenuation of downing switch and the descending programmable attenuator of attenuator driver control, self-correcting signal or measuring-signal after overdamping are exported by descending programmable attenuator, and downing switch is exported a road in the different frequency downlink radio-frequency signal with decay driver control downstream signal switch;

Radio frequency interface module is by filter, splitter, synthesizer forms, realize fixed intermediate frequency filtering or rf filtering, and the road function is closed in the shunt that signal is provided, its theory diagram as shown in Figure 2, radio frequency interface module is by splitter, the first filtering splitter, the second filtering splitter, the 70MHz filter, threeway and mixer form, one tunnel descending synthetic input radiofrequency signal is divided into two-way through splitter, wherein one tunnel descending synthetic input radiofrequency signal is divided into the radiofrequency signal output of three road different frequencies through the first filtering splitter, the descending synthetic input radiofrequency signal in another road is divided into the radiofrequency signal output of three road different frequencies through the second filtering splitter, the 70MHz input signal is exported behind the 70MHz filter filtering, the 10MHz input signal is divided into the output of three road 10MHz signals through threeway, and two-way synthetic input signal is through synthetic one road signal output of mixer.

The switching of the switching of data feedback channel realization control out-hole run and self-correcting state, control upward signal power level, the spectral monitoring port that upward signal is provided, the up different observing and controlling system signals of control 70MHz.The switching of the switching of down going channel realization control down-run survey and self-correcting state, control downstream signal power level, the spectral monitoring port that downstream signal is provided, the descending different observing and controlling system signals of control.The up-downgoing passage respectively comprises 2 programmable attenuators, and model is Agilent 8494H and Agilent 8496H.Wherein, the Agilent8494H attenuation range is: 0～11dB, stepping 1dB; Agilent 8496H attenuation range is: 0～110dB, stepping 10dB.Both make up and realize measurement/self-correcting signal power decay 0～121dB, attenuation stepping 1dB.Thereby all grammed switches and programmable attenuator all can be by gpib interface the program control or button by front panel manually control realize the function of up switch and attenuator driver or downing switch and attenuator driver, the operating state of all grammed switches and programmable attenuator can be by the gpib interface program inquiring.Be to guarantee star ground device security, the switch matrix device power or reset after, the attenuator attenuation is made as maximum automatically.

The utility model not detailed description is technology as well known to those skilled in the art.

Claims (1)

1. microwave switching matrix is used in a radiofrequency signal test, and it is characterized in that: be comprised of general module and radio frequency interface module, wherein general module comprises data feedback channel and down going channel;

Data feedback channel is by up splitter, up programmable attenuator, out-hole run and self-test switch, up switch and attenuator driver and 70MHz switch form, out-hole run and self-correcting input signal are divided into two-way through up splitter, row is measured with the self-correcting input signal and is used to carry out spectral monitoring on the way, another road out-hole run and self-correcting input signal enter up programmable attenuator, the attenuation of up switch and the up programmable attenuator of attenuator driver control, out-hole run after overdamping and self-correcting input signal enter out-hole run and self-check key, up switch and attenuator driver control out-hole run and self-check key output self-correcting signal or measuring-signal, up switch is exported a road in the up 70MHz radiofrequency signal of two-way with decay driver control 70MHz switch;

Down going channel is by descending splitter, descending programmable attenuator, down-run survey and self-test switch, downing switch and attenuator driver and downstream signal switch form, downing switch and attenuator driver control down-run survey and self-check key input self-correcting signal or measuring-signal, self-correcting signal or measuring-signal are divided into two-way through descending splitter, one tunnel self-correcting signal or measuring-signal are used to carry out spectral monitoring, another road self-correcting signal or measuring-signal enter descending programmable attenuator, the attenuation of downing switch and the descending programmable attenuator of attenuator driver control, self-correcting signal or measuring-signal after overdamping are exported by descending programmable attenuator, and downing switch is exported a road in the different frequency downlink radio-frequency signal with decay driver control downstream signal switch;

Radio frequency interface module is by splitter, the first filtering splitter, the second filtering splitter, the 70MHz filter, threeway and mixer form, one tunnel descending synthetic input radiofrequency signal is divided into two-way through splitter, wherein one tunnel descending synthetic input radiofrequency signal is divided into the radiofrequency signal output of three road different frequencies through the first filtering splitter, the descending synthetic input radiofrequency signal in another road is divided into the radiofrequency signal output of three road different frequencies through the second filtering splitter, the 70MHz input signal is exported behind the 70MHz filter filtering, the 10MHz input signal is divided into the output of three road 10MHz signals through threeway, and two-way synthetic input signal is through synthetic one road signal output of mixer.

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