CN214256304U - Signal receiving and transmitting module for WIFI radio frequency front end - Google Patents
Signal receiving and transmitting module for WIFI radio frequency front end Download PDFInfo
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- CN214256304U CN214256304U CN202120668252.7U CN202120668252U CN214256304U CN 214256304 U CN214256304 U CN 214256304U CN 202120668252 U CN202120668252 U CN 202120668252U CN 214256304 U CN214256304 U CN 214256304U
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Abstract
The utility model discloses a signal transceiver module for WIFI radio frequency front end, which comprises a DAC submodule, a signal transmitting channel, an ADC submodule, a signal receiving channel, a circulator and a signal transceiver antenna connected with the circulator; the input end of the signal transmitting channel receives a signal to be transmitted through the DAC submodule, and the output end of the signal transmitting channel is connected with the signal receiving and transmitting antenna through the circulator; the input end of the signal receiving channel is connected with the signal receiving and transmitting antenna through the circulator, the output end of the signal receiving channel is connected with the ADC submodule, the ADC submodule outputs received signals outwards, and the signal receiving and transmitting module further comprises a local oscillation signal input port used for receiving local oscillation signals input from the outside. The utility model provides a signal transceiver module can effectively restrain DAC stray and can realize adjusting the decay.
Description
Technical Field
The utility model relates to a WIFI signal receiving and dispatching especially relates to a signal receiving and dispatching module for WIFI radio frequency front end.
Background
With the development of communication technology, more and more WIFI radio frequency front ends appear in social life and work, and play more and more important roles. The signal transceiving module is an important component of the WIFI radio frequency front end, and the improvement of the signal transceiving performance of the signal transceiving module has important significance for the work of the WIFI radio frequency front end.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a signal transceiver module for WIFI radio frequency front end, can effectively restrain DAC stray and can realize adjusting the decay.
The purpose of the utility model is realized through the following technical scheme: the utility model provides a signal transceiver module for WIFI radio frequency front end which characterized in that: the device comprises a DAC submodule, a signal transmitting channel, an ADC submodule, a signal receiving channel, a circulator and a signal receiving and transmitting antenna connected with the circulator;
the input end of the signal transmitting channel receives a signal to be transmitted through the DAC submodule, and the output end of the signal transmitting channel is connected with the signal receiving and transmitting antenna through the circulator;
the input end of the signal receiving channel is connected with the signal receiving and transmitting antenna through the circulator, the output end of the signal receiving channel is connected with the ADC submodule, and the ADC submodule outputs received signals outwards.
The signal receiving and transmitting module further comprises a local oscillator signal input port for receiving an externally input local oscillator signal.
Furthermore, the signal transmitting channel comprises a first mixer and a first switch unit, the DAC sub-module is connected with a first input end of the first mixer sequentially through a first acoustic meter filter, a first attenuator and a second acoustic meter filter, a second input end of the first mixer is connected with a local oscillation signal input port, an output end of the first mixer is connected with an input end of the first switch unit sequentially through a first dielectric filter, a first AMP amplifier, a second attenuator, a second AMP amplifier, a third attenuator and a power amplifier, and an output end of the first switch unit is connected with the circulator. The first attenuator adopts a pi-type resistance attenuator. The second attenuator and the third attenuator adopt digital control attenuators. The first switch unit adopts a single-pole double-throw switch, the moving end of the single-pole double-throw switch is used as the input end of the first switch unit and is connected with the power amplifier, one fixed end of the single-pole double-throw switch is grounded, and the other fixed end of the single-pole double-throw switch is used as the output end of the first switch unit and is connected with the circulator.
Furthermore, the signal receiving channel comprises a second switch unit and a second mixer, an input end of the second switch unit is connected with the circulator, an output end of the second switch unit is connected with a first input end of the second mixer sequentially through a low noise amplifier, a second medium filter, a fourth attenuator and a third AMP amplifier, a second input end of the second mixer is connected with a local oscillation signal input port, and an output end of the second mixer is connected with the ADC submodule sequentially through a third acoustic meter filter, a fourth AMP amplifier, a fifth attenuator, a fifth AMP amplifier, a sixth attenuator, a seventh AMP amplifier and an LPF filter. And the fourth attenuator, the fifth attenuator and the sixth attenuator are all digitally controlled attenuators. The second switch unit adopts a single-pole double-throw switch, the moving end of the single-pole double-throw switch is used as the input end of the second switch unit and is connected with the circulator, one fixed end of the single-pole double-throw switch is grounded, and the other fixed end of the single-pole double-throw switch is used as the output end of the second switch unit and is connected with the low-noise amplifier.
The utility model has the advantages that: DAC is effectively restrained from being stray, so that new energy of signal receiving and sending is improved, attenuation adjustment can be achieved, and great convenience is provided for adjustment of channel consistency of the whole WIFI radio frequency front end.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1, a signal transceiver module for a WIFI radio frequency front end is characterized in that: the device comprises a DAC submodule, a signal transmitting channel, an ADC submodule, a signal receiving channel, a circulator and a signal receiving and transmitting antenna connected with the circulator;
the input end of the signal transmitting channel receives a signal to be transmitted through the DAC submodule, and the output end of the signal transmitting channel is connected with the signal receiving and transmitting antenna through the circulator;
the input end of the signal receiving channel is connected with the signal receiving and transmitting antenna through the circulator, the output end of the signal receiving channel is connected with the ADC submodule, and the ADC submodule outputs received signals outwards.
The signal receiving and transmitting module further comprises a local oscillator signal input port for receiving an externally input local oscillator signal.
Furthermore, the signal transmitting channel comprises a first mixer and a first switch unit, the DAC sub-module is connected with a first input end of the first mixer sequentially through a first acoustic meter filter, a first attenuator and a second acoustic meter filter, a second input end of the first mixer is connected with a local oscillation signal input port, an output end of the first mixer is connected with an input end of the first switch unit sequentially through a first dielectric filter, a first AMP amplifier, a second attenuator, a second AMP amplifier, a third attenuator and a power amplifier, and an output end of the first switch unit is connected with the circulator. The first attenuator adopts a pi-type resistance attenuator. The second attenuator and the third attenuator adopt digital control attenuators. The first switch unit adopts a single-pole double-throw switch, the moving end of the single-pole double-throw switch is used as the input end of the first switch unit and is connected with the power amplifier, one fixed end of the single-pole double-throw switch is grounded, and the other fixed end of the single-pole double-throw switch is used as the output end of the first switch unit and is connected with the circulator.
Furthermore, the signal receiving channel comprises a second switch unit and a second mixer, an input end of the second switch unit is connected with the circulator, an output end of the second switch unit is connected with a first input end of the second mixer sequentially through a low noise amplifier, a second medium filter, a fourth attenuator and a third AMP amplifier, a second input end of the second mixer is connected with a local oscillation signal input port, and an output end of the second mixer is connected with the ADC submodule sequentially through a third acoustic meter filter, a fourth AMP amplifier, a fifth attenuator, a fifth AMP amplifier, a sixth attenuator, a seventh AMP amplifier and an LPF filter. And the fourth attenuator, the fifth attenuator and the sixth attenuator are all digitally controlled attenuators. The second switch unit adopts a single-pole double-throw switch, the moving end of the single-pole double-throw switch is used as the input end of the second switch unit and is connected with the circulator, one fixed end of the single-pole double-throw switch is grounded, and the other fixed end of the single-pole double-throw switch is used as the output end of the second switch unit and is connected with the low-noise amplifier.
When signal transmission is carried out, the output frequency of a DAC 1120MHz is amplified, filtered and mixed to a 4700MHz-5600MHz frequency band, then filtering and amplifying are carried out, because the maximum single-tone transmission signal of the DAC can reach 0dBm, the spurious ratio is large, a 2-level acoustic meter filter cascade filtering is adopted to reach the intermediate frequency input end of the mixer, the nominal value of the intermediate frequency input power of the LTC5576 is-10 dBm, and pi attenuation is added between the acoustic meter filters to adjust the intermediate frequency input power. A digitally controlled attenuator HMC792 with one-step 0.25dB attenuation step added to the transmit chain is used to adjust channel uniformity. When receiving signals, the input signals are mixed to the intermediate frequency of 1120MHz after being amplified by LNA and filtering, and then are amplified and filtered, and then are sampled by ADC. A digitally controlled attenuator HMC792 with one-step 0.25dB attenuation step added to the receive chain is used to adjust channel uniformity.
It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit and essence of the invention, and these changes and modifications should fall within the scope of the appended claims.
Claims (9)
1. The utility model provides a signal transceiver module for WIFI radio frequency front end which characterized in that: the device comprises a DAC submodule, a signal transmitting channel, an ADC submodule, a signal receiving channel, a circulator and a signal receiving and transmitting antenna connected with the circulator;
the input end of the signal transmitting channel receives a signal to be transmitted through the DAC submodule, and the output end of the signal transmitting channel is connected with the signal receiving and transmitting antenna through the circulator;
the input end of the signal receiving channel is connected with the signal receiving and transmitting antenna through the circulator, the output end of the signal receiving channel is connected with the ADC submodule, and the ADC submodule outputs received signals outwards.
2. The signal transceiver module for the WIFI radio frequency front end of claim 1, wherein: the signal receiving and transmitting module further comprises a local oscillator signal input port for receiving an externally input local oscillator signal.
3. The signal transceiver module for the WIFI radio frequency front end of claim 2, characterized in that: the signal transmitting channel comprises a first mixer and a first switch unit, the DAC submodule is connected with a first input end of the first mixer sequentially through a first acoustic meter filter, a first attenuator and a second acoustic meter filter, a second input end of the first mixer is connected with a local oscillation signal input port, an output end of the first mixer is connected with an input end of the first switch unit sequentially through a first medium filter, a first AMP amplifier, a second attenuator, a second AMP amplifier, a third attenuator and a power amplifier, and an output end of the first switch unit is connected with the circulator.
4. The signal transceiver module for the WIFI radio frequency front end of claim 3, wherein: the first attenuator adopts a pi-type resistance attenuator.
5. The signal transceiver module for the WIFI radio frequency front end of claim 3, wherein: the second attenuator and the third attenuator adopt digital control attenuators.
6. The signal transceiver module for the WIFI radio frequency front end of claim 3, wherein: the first switch unit adopts a single-pole double-throw switch, the moving end of the single-pole double-throw switch is used as the input end of the first switch unit and is connected with the power amplifier, one fixed end of the single-pole double-throw switch is grounded, and the other fixed end of the single-pole double-throw switch is used as the output end of the first switch unit and is connected with the circulator.
7. The signal transceiver module for the WIFI radio frequency front end of claim 2, characterized in that: the signal receiving channel comprises a second switch unit and a second mixer, the input end of the second switch unit is connected with the circulator, the output end of the second switch unit is connected with the first input end of the second mixer sequentially through a low noise amplifier, a second medium filter, a fourth attenuator and a third AMP amplifier, the second input end of the second mixer is connected with the local oscillation signal input port, and the output end of the second mixer is connected with the ADC submodule sequentially through a third sound meter filter, a fourth AMP amplifier, a fifth attenuator, a fifth AMP amplifier, a sixth attenuator, a seventh AMP amplifier and an LPF filter.
8. The signal transceiver module for the WIFI radio frequency front end of claim 7, wherein: and the fourth attenuator, the fifth attenuator and the sixth attenuator are all digitally controlled attenuators.
9. The signal transceiver module for the WIFI radio frequency front end of claim 7, wherein: the second switch unit adopts a single-pole double-throw switch, the moving end of the single-pole double-throw switch is used as the input end of the second switch unit and is connected with the circulator, one fixed end of the single-pole double-throw switch is grounded, and the other fixed end of the single-pole double-throw switch is used as the output end of the second switch unit and is connected with the low-noise amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120668252.7U CN214256304U (en) | 2021-04-01 | 2021-04-01 | Signal receiving and transmitting module for WIFI radio frequency front end |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120668252.7U CN214256304U (en) | 2021-04-01 | 2021-04-01 | Signal receiving and transmitting module for WIFI radio frequency front end |
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| CN214256304U true CN214256304U (en) | 2021-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111683343A (en) * | 2020-06-05 | 2020-09-18 | 成都玖锦科技有限公司 | ATC and DME combined comprehensive test system |
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2021
- 2021-04-01 CN CN202120668252.7U patent/CN214256304U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111683343A (en) * | 2020-06-05 | 2020-09-18 | 成都玖锦科技有限公司 | ATC and DME combined comprehensive test system |
| CN111683343B (en) * | 2020-06-05 | 2022-07-05 | 成都玖锦科技有限公司 | ATC and DME combined comprehensive test system |
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