CN220067434U - Radio frequency debugging circuit and communication device - Google Patents

Abstract

The utility model discloses a radio frequency debugging circuit and a communication device, which relate to the technical field of radio frequency debugging and are used for solving the problem that the damage rate of a printed circuit board is increased when a chip communication module with high integration level is debugged by using a flying lead. The radio frequency debug circuitry includes: the device comprises a switch module, a power supply module and a communication module to be tested. The communication module to be tested is provided with a plurality of transmission lines, a first end of the switch module is electrically connected with the communication module to be tested through the plurality of transmission lines, a second end of the switch module is grounded, and the switch module is used for setting the current levels of the plurality of transmission lines to be corresponding target levels according to the frequency band to be tested so as to switch the communication module to be tested to corresponding signal paths to be tested; the power supply module is electrically connected with the switch module through a plurality of transmission lines and is used for supplying power to the switch module.

Description

Radio frequency debugging circuit and communication device

Technical Field

The present utility model relates to the field of radio frequency debugging technologies, and in particular, to a radio frequency debugging circuit and a communication device.

Background

With the rapid development of communication technology, the performance requirements of users on the communication module are also higher and higher, and the functions of the communication module are also increased. However, based on the miniaturization trend of the communication module, the size of the single module is smaller and smaller, so that the chip integration level is continuously improved.

In the prior art, flying leads are often used for debugging the radio frequency performance of the communication module, but a chip with high integration level can increase debugging complexity and even increase the damage rate of a printed circuit board (Printed Circuit Board, PCB).

Disclosure of Invention

The utility model aims to provide a radio frequency debugging circuit and a communication device, which are used for solving the problem that the damage rate of a printed circuit board is increased when a chip communication module with high integration level is debugged by using a flying lead.

In a first aspect, the present utility model provides a radio frequency debug circuit comprising: the device comprises a switch module, a power supply module and a communication module to be tested.

The communication module to be tested is provided with a plurality of transmission lines, a first end of the switch module is electrically connected with the communication module to be tested through the plurality of transmission lines, a second end of the switch module is grounded, and the switch module is used for setting the current levels of the plurality of transmission lines as corresponding target levels according to the frequency band to be tested so as to switch the communication module to be tested to corresponding signal paths to be tested;

the power supply module is electrically connected with the switch module through a plurality of transmission lines and is used for supplying power to the switch module.

Compared with the prior art, in the radio frequency debugging circuit provided by the utility model, the switch module can control the communication module to be tested to be switched to the corresponding signal path to be tested according to the frequency band to be tested to be debugged, so that other signal paths are not influenced when the path to be tested is debugged, and the accuracy of radio frequency debugging is ensured. And when the signal path to be tested is switched, the switch module can be realized by changing the level of the corresponding transmission line without flying wires, so that the damage to the circuit board during flying wire welding can be avoided, even if the radio frequency signal path to be debugged relates to the wiring of the inner layer of the PCB, the inner layer of the PCB is not required to be welded, the level of the transmission line can be controlled, the debugging complexity is not increased, the further damage to the PCB is avoided, and the damage rate of the PCB can be reduced.

In addition, the power supply module is used for supplying power to the switch module, when the communication module to be detected is not required to be debugged, the power supply module can be controlled to stop supplying power to the switch module, the switch module can stop working under the condition of power failure, and the normal use of the communication module can not be influenced.

Optionally, the switch module is a dial switch.

Optionally, the switch module is a pin header connector.

Optionally, the power supply module includes a first power supply and a plurality of resistors, and the first power supply is connected with a plurality of transmission lines in a one-to-one correspondence through each resistor respectively.

Optionally, the voltage range of the first power supply includes 1.8V to 3.3V.

Optionally, the communication module to be tested comprises a radio frequency chip, a power amplifier, a filter, at least one radio frequency switch and an antenna which are electrically connected in sequence;

the first end of the switch module is electrically connected with the radio frequency switch through a plurality of transmission lines and is used for setting the current levels of the transmission lines to corresponding target levels according to the frequency band to be tested so as to switch the radio frequency switch to a corresponding signal path to be tested.

Optionally, the communication module to be tested further includes a second power supply;

the first end of the second power supply is electrically connected with the radio frequency switch, the second end of the second power supply is electrically connected with the switch module, and the switch module is used for controlling the second power supply to supply power to the radio frequency switch.

Optionally, the first power supply and the second power supply are the same power supply;

or, the first power supply and the second power supply are different power supplies.

In a second aspect, the present utility model provides a communication device, including a to-be-tested communication module, a carrier board, and a radio frequency debug circuit as described in the first aspect or any one of the first aspects;

when the communication module to be tested is arranged in the first target area of the carrier plate, the radio frequency debugging circuit is arranged in the second target area of the carrier plate.

Optionally, the carrier is a printed circuit board.

Compared with the prior art, the beneficial effects of the communication device provided by the utility model are the same as those of the radio frequency debugging circuit in the first aspect or any one of the first aspects, and the description is omitted here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.

In the drawings:

fig. 1 is a schematic structural diagram of a radio frequency debug circuit according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another RF debug circuit according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a communication module to be tested according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a radio frequency debug circuit according to another embodiment of the present utility model.

Reference numerals:

a 1-communication module to be tested, a 2-switch module,

3-power supply modules, 11-transmission lines,

21-dial switch, 31-first power source,

12-radio frequency chip, 13-power amplifier,

14-filters, 15-radio frequency switches,

16-antenna.

Detailed Description

In order to clearly describe the technical solution of the embodiments of the present utility model, in the embodiments of the present utility model, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. For example, the first threshold and the second threshold are merely for distinguishing between different thresholds, and are not limited in order. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

In the present utility model, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the present utility model, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c can be single or multiple.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

With the rapid development of communication technology, the performance requirements of users on the communication module are also higher and higher, and the functions of the communication module are also increased. However, based on the miniaturization trend of the communication module, the size of the single module is smaller and smaller, so that the chip integration level is continuously improved. And the chip with high integration level also increases the difficulty of hardware debugging.

At present, in the process of debugging performances such as radio frequency power of a communication module, when signal quality of a certain signal path is required to be analyzed or part of impedance is required to be debugged, flying wire debugging is often used, the flying wire debugging is required to be connected to the communication module to be tested through welding, if the signal path to be debugged relates to wiring of an inner layer of a PCB, debugging complexity is greatly increased, the PCB is damaged, and even the damage rate of the PCB is increased.

In view of this, referring to fig. 1, an embodiment of the present utility model provides a radio frequency debug circuit. Comprising the following steps: the device comprises a switch module 2, a power supply module 3 and a communication module 1 to be tested.

The to-be-tested communication module 1 is provided with a plurality of transmission lines 11, a first end of the switch module 2 is electrically connected with the to-be-tested communication module 1 through the plurality of transmission lines 11, a second end of the switch module 2 is grounded, and the switch module 2 is used for setting the current levels of the plurality of transmission lines 11 to corresponding target levels according to the to-be-tested frequency band so as to switch the to-be-tested communication module 1 to corresponding to-be-tested signal paths;

the power supply module 3 is electrically connected to the switch module 2 via a plurality of transmission lines 11 for supplying power to the switch module 2.

The specific implementation method comprises the following steps: the transmission line 11 is actually a general purpose input/Output (GPIO). After determining the frequency band to be debugged, the switch module 2 can determine the GPIO used by the frequency band to be debugged according to the frequency band to be debugged, so that the GPIO required by the frequency band to be debugged is turned on, and the GPIO not required to be used is turned off, so that the communication module 1 to be debugged is switched to the signal path to be debugged corresponding to the frequency band to be debugged.

According to the specific structure and implementation process of the radio frequency debugging circuit, the switch module 2 can control the to-be-tested communication module 1 to be switched to the corresponding to-be-tested signal path according to the to-be-tested frequency band to be debugged, so that other signal paths are not affected when the to-be-tested path is debugged, and the accuracy of radio frequency debugging is ensured. And when the signal path to be tested is switched, the switch module 2 can be realized by changing the level of the corresponding transmission line 11 without passing through a flying wire, so that the damage to a circuit board during flying wire welding can be avoided, even if the radio frequency signal path to be debugged relates to the wiring of the inner layer of the PCB, the inner layer of the PCB is not required to be welded, the level of the transmission line 11 can be controlled, the debugging complexity can not be increased, the further damage to the PCB is avoided, and the damage rate of the PCB can be reduced.

In addition, the power supply module 3 is used for supplying power to the switch module 2, and when the to-be-detected communication module 1 is not required to be debugged, the power supply module 3 can be controlled to stop supplying power to the switch module 2, and the switch module 2 can stop working under the condition of power failure and can not influence the normal use of the communication module.

In one possible implementation, as shown in fig. 2, the switch module 2 is a dial switch 21.

For example, when the LTE B1 band needs to be debugged, the correspondingly used GPIOs are GPIOs 1 and GPIOs 2, the dial switch 21 only needs to set the level of the correspondingly connected GPIOs 1 and GPIOs 2 to be high level and the level of the GPIOs 3 to be low level, and the current to-be-detected communication module 1 is located in the to-be-detected signal path corresponding to the LTE B1 band, so that only the to-be-detected signal path corresponding to the LTE B1 band can be debugged, and similarly, when other bands need to be debugged, only the level of the corresponding GPIOs needs to be set to be high level and the level of the GPIOs which does not need to be used needs to be set to be low level.

Note that the on-state may be set to the high level, the off-state may be set to the low level, or the on-state may be set to the low level, and the off-state may be set to the high level, according to actual needs. In addition, according to the number of GPIOs of the communication module 1 to be tested, the dial switch 21 may be an 8-bit dial switch 21, a 10-bit dial switch 21, a 16-bit dial switch 21, or the like, which is not particularly limited in the embodiment of the present utility model.

In one possible implementation, the switch module 2 is a pin header connector.

Specifically, the pin header connection ends on the pin header connectors are electrically connected with the corresponding transmission lines 11, so that the type of the pin header connectors, for example, single-row pins, double-row pins or three-row pins, can be determined according to the number of GPIOs of the communication module 1 to be tested, and the spacing of the pin header connectors, for example, 2.54mm (millimeters), 2.00mm, 1.27mm, 1.00mm or 0.8mm can be determined according to the size of the chip, which is not particularly limited in the embodiment of the utility model.

In some embodiments, the power supply module 3 includes a first power source 31 and a plurality of resistors R, where the first power source 31 is respectively connected to the plurality of transmission lines 11 in a one-to-one correspondence manner through each resistor R.

For example, the voltage range of the first power supply 31 includes 1.8V to 3.3V, and when power is supplied, the corresponding power supply voltage can be selected according to the specific model of the switch module 2, so as to meet the requirements of the switch module 2 for different power supply voltages.

In practical application, when the to-be-tested communication module 1 needs to be debugged, the first power supply 31 can be controlled to supply power to the switch module 2 so that the switch module 2 is in a working state, when the to-be-tested communication module 1 does not need to be debugged, the first power supply 31 can also be controlled to stop supplying power to the switch module 2 so that the switch module 2 is in a power-off state, then a passage between the to-be-tested communication module 1 and the switch module 2 is turned off, and the to-be-tested communication module 1 can be normally used.

In some embodiments, as shown in fig. 3 and 4, the communication module 1 to be tested includes a radio frequency chip 12, a power amplifier 13, a filter 14, at least one radio frequency switch 15, and an antenna 16 electrically connected in sequence. The first end of the switch module 2 is electrically connected to the radio frequency switch 15 through a plurality of transmission lines 11, and is configured to set the current levels of the plurality of transmission lines 11 to corresponding target levels according to the frequency band to be tested, so as to switch the radio frequency switch 15 to a corresponding signal path to be tested.

It can be understood that, according to the different application communication networks, the number of the radio frequency switches 15 in the corresponding communication module 1 to be tested is also different. For example, the number of the radio frequency switches 15 applied to the 5G project may be plural, and the dial switch 21 may be set to 16-bit dial switch 21, so that the plurality of radio frequency switches 15 are debugged by the same dial switch 21. Based on the method, not only can the hardware debugging cost be saved, but also the debugging efficiency can be improved. In addition, the plurality of radio frequency switches 15 are debugged through the same dial switch 21, so that debugging errors caused by differences of different dial switches 21 can be avoided to a certain extent, and the accuracy of radio frequency debugging can be improved.

Illustratively, the to-be-tested communication module 1 further includes a second power supply; the first end of the second power supply is electrically connected with the radio frequency switch 15, the second end of the second power supply is electrically connected with the switch module 2, and the switch module 2 is used for controlling the second power supply to supply power to the radio frequency switch 15. Based on this, the switch module 2 not only can be used for controlling the radio frequency switch 15 to switch the signal path, but also can control the power supply of the radio frequency switch 15, when the radio frequency switch 15 is required to be powered off due to the occurrence of abnormality in the debugging process, the power supply of the second power supply to the radio frequency switch 15 can be immediately turned off only through the switch module 2, and the damage of the radio frequency switch 15 can be avoided.

Illustratively, the first power source 31 is the same power source as the second power source; alternatively, the first power source 31 and the second power source are different power sources.

It will be appreciated that when the supply voltage required by the rf switch 15 and the switch module 2 are consistent, only the first power supply 31 may be provided to supply power to both the rf switch 15 and the switch module 2, and thus the hardware cost of the circuit element may be saved to some extent.

When the power supply voltages required by the radio frequency switch 15 and the switch module 2 are inconsistent, the first power supply 31 is required to supply power to the switch module 2, and the second power supply is required to supply power to the radio frequency switch 15, so that the first power supply 31 can be turned off when the to-be-detected communication module 1 is not required to be debugged, the normal use of the communication module is not influenced, and the energy loss can be reduced to a certain extent.

The embodiment of the utility model also provides a communication device which comprises a communication module to be tested, a carrier plate and the radio frequency debugging circuit provided by the embodiment. When the communication module to be tested is arranged in the first target area of the carrier plate, the radio frequency debugging circuit is arranged in the second target area of the carrier plate.

It is understood that the carrier board is a printed circuit board.

Based on the above, the area where the radio frequency debugging circuit is located is not overlapped with the area where the communication module to be tested is located, and when the radio frequency debugging is not needed to be carried out on the communication module, the radio frequency debugging circuit does not have adverse effect on the normal use of the communication module.

The communication device may be any communication device applied to narrowband internet of things communication (Narrow Band Internet Of Things, NB-Iot), 4G communication or 5G communication, which is not particularly limited in the embodiment of the present utility model.

Compared with the prior art, the beneficial effects of the communication device provided by the utility model are the same as those of the radio frequency debugging circuit provided by the embodiment, and the description is omitted here.

Although the utility model is described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed utility model, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the utility model has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the utility model. Accordingly, the specification and drawings are merely exemplary illustrations of the present utility model as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A radio frequency debug circuit, comprising: switch module, power module, communication module that awaits measuring, wherein:

the switch module is used for setting the current levels of the transmission lines as corresponding target levels according to the frequency bands to be tested so as to switch the communication module to a corresponding signal path to be tested;

the power supply module is electrically connected with the switch module through a plurality of transmission lines and is used for supplying power to the switch module.

2. The radio frequency debug circuitry of claim 1, wherein the switch module is a dial switch.

3. The radio frequency debug circuitry of claim 1, wherein the switch module is a pin header connector.

4. The radio frequency debug circuitry of claim 1, wherein the power module comprises a first power source and a plurality of resistors, the first power source being connected in one-to-one correspondence with the plurality of transmission lines through each of the resistors, respectively.

5. The radio frequency debug circuitry of claim 4, wherein the voltage range of the first power source comprises 1.8V to 3.3V.

6. The radio frequency debug circuitry of claim 4, wherein the communication module to be tested comprises a radio frequency chip, a power amplifier, a filter, at least one radio frequency switch, and an antenna electrically connected in sequence;

the first end of the switch module is electrically connected with the radio frequency switch through a plurality of transmission lines and is used for setting the current levels of the transmission lines to the corresponding target levels according to the frequency band to be tested so as to switch the radio frequency switch to the corresponding signal path to be tested.

7. The radio frequency debug circuitry of claim 6, wherein the communication module under test further comprises a second power source;

the first end of the second power supply is electrically connected with the radio frequency switch, the second end of the second power supply is electrically connected with the switch module, and the switch module is used for controlling the second power supply to supply power to the radio frequency switch.

8. The radio frequency debug circuitry of claim 7, wherein the first power source and the second power source are the same power source;

or, the first power supply and the second power supply are different power supplies.

9. A communication device, comprising a communication module to be tested, a carrier plate and the radio frequency debugging circuit of any one of claims 1-8;

when the communication module to be tested is arranged in the first target area of the carrier plate, the radio frequency debugging circuit is arranged in the second target area of the carrier plate.

10. The communication device of claim 9, wherein the carrier board is a printed circuit board.