CN112202458A - Communication module and communication terminal - Google Patents
Communication module and communication terminal Download PDFInfo
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- CN112202458A CN112202458A CN202010953777.5A CN202010953777A CN112202458A CN 112202458 A CN112202458 A CN 112202458A CN 202010953777 A CN202010953777 A CN 202010953777A CN 112202458 A CN112202458 A CN 112202458A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The application relates to a communication module and a communication terminal. The communication module includes: the receiving and transmitting antenna is used for transmitting signals of a first frequency band and receiving signals of a second frequency band, and the frequency of the first frequency band is less than that of the second frequency band; the first frequency band signal output unit is connected with the receiving and transmitting antenna to form a transmitting link and used for outputting a signal of a first frequency band and transmitting the signal through the receiving and transmitting antenna; the second frequency band signal receiving unit is connected with the transceiving antenna to form a receiving link and is used for receiving the signal of the second frequency band output after the transceiving antenna receives the signal; and the filtering unit is connected with the transmitting link and used for filtering the second harmonic of the first frequency band in the transmitting link. By adopting the method and the device, the interference of the signal of the second frequency band received by the signal transmitting and receiving antenna transmitting the second harmonic signal can be reduced, and thus the signal interference is reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication module and a communication terminal.
Background
With the development of communication technology, 5G mobile communication networks have been used on a large scale. In 5G network deployment, an EN-DC (EUTRA-NR Dual Connection) architecture in a common non-independent Networking (NSA) mode is a Dual Connection with EUTRA as a main node and NR as an auxiliary node, and is connected to a 4G core network, a 4G base station is a main station, and a 5G base station is an auxiliary station.
At present, the M.2 module adopted for communication is generally 4 antennas, and can work based on two frequency bands of EN-DC combination Band3+ n 78. The operating frequency of the Band3 is 1710Mhz-1784.9Mhz, and the operating frequency of n78 is 3300Mhz-4200Mhz, so that the second harmonic of the Band3 is just in the operating frequency Band of n 78. When the two frequency bands of the EN-DC combined Band3+ n78 work, because the receiving of the n78 frequency Band and the transmitting of the Band3 frequency Band share one antenna port, namely, the same antenna is a transmitting antenna of the Band3 frequency Band and a receiving antenna of the n78 frequency Band, and the second harmonic of the Band3 is in the working frequency Band of the n78 frequency Band, the second harmonic of the Band3 can interfere with the receiving of the n78, so that the problem of signal interference exists.
Disclosure of Invention
Accordingly, there is a need for a communication module and a communication terminal that can reduce signal interference.
A communication module, comprising:
the receiving and transmitting antenna is used for transmitting a signal of a first frequency band and receiving a signal of a second frequency band, and the frequency of the first frequency band is less than that of the second frequency band;
the first frequency band signal output unit is connected with the transceiving antenna to form a transmitting link and used for outputting the signal of the first frequency band and transmitting the signal through the transceiving antenna;
the second frequency band signal receiving unit is connected with the transceiving antenna to form a receiving link and is used for receiving the signal of the second frequency band output after the transceiving antenna receives the signal;
and the filtering unit is connected with the transmitting link and used for filtering the second harmonic of the first frequency band in the transmitting link.
In one embodiment, the filter unit comprises a resonant circuit, one end of the resonant circuit is connected with the transmitting link, and the other end of the resonant circuit is grounded.
In one embodiment, the resonant frequency of the resonant circuit is equal to a center point frequency in a frequency range corresponding to the second harmonic of the first frequency band.
In one embodiment, the resonant circuit includes an inductor and a capacitor, the inductor and the capacitor are connected in series, one end of the series is connected to the transmitting link, and the other end of the series is grounded.
In one embodiment, the filter unit further comprises a switching circuit, and the resonant circuit is connected to the transmission link through the switching circuit.
In one embodiment, the switch circuit comprises a controller and a single-pole single-throw switch, wherein a control end of the single-pole single-throw switch is connected with the controller, one of a movable end and a fixed end of the single-pole single-throw switch is connected with the transmitting link, and the other end of the single-pole single-throw switch is connected with the resonance circuit.
In one embodiment, the controller controls the single-pole single-throw switch to be closed when the first frequency band and the second frequency band are combined for communication, and otherwise controls the single-pole single-throw switch to be opened.
In one embodiment, the communication module further includes a frequency divider, and the transceiver antenna is connected to the first frequency band signal output unit and the second frequency band signal receiving unit through the frequency divider.
In one embodiment, the filter unit is connected between the frequency divider and the first frequency band signal output unit.
In the communication module, the first frequency band signal output unit is connected with the transceiving antenna to form a transmitting link, the second frequency band signal receiving unit is connected with the transceiving antenna to form a receiving link, and the transceiving antenna can transmit signals of a first frequency band and can receive signals of a second frequency band; by connecting a filtering unit on the transmitting link and filtering the second harmonic of the first frequency band in the transmitting link, the interference of the signal of the second harmonic transmitted by the transmitting and receiving antenna to the received signal of the second frequency band can be reduced, thereby reducing the signal interference.
A communication terminal comprises the communication module.
By adopting the communication module, the communication terminal can reduce the signal interference to the second frequency band when the first frequency band and the second frequency band are combined for communication, thereby improving the communication effect of the communication terminal.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a communication module in one embodiment;
fig. 2 is a block diagram of a communication module in another embodiment;
fig. 3 is a block diagram of a communication module in a further embodiment;
FIG. 4(a) is a diagram illustrating the results of a simulation experiment performed without the addition of a resonant circuit;
fig. 4(b) is a schematic diagram showing the results of a simulation experiment performed when a resonant circuit is added.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
In one embodiment, as shown in fig. 1, a communication module is provided, which includes a transceiving antenna 110, a first frequency band signal output unit 120, a second frequency band signal receiving unit 130, and a filtering unit 140. The transceiving antenna 110 is an antenna for transmitting and receiving signals in a mobile communication network; the transceiving antenna 110 is used for transmitting signals of a first frequency band and receiving signals of a second frequency band. Wherein the first frequency band comprises frequencies in a first frequency range and the second frequency band comprises frequencies in a second frequency range; the frequency of the first frequency band is smaller than the frequency of the second frequency band, specifically, the maximum frequency corresponding to the first frequency band is smaller than the minimum frequency of the second frequency band, that is, the frequencies in the first frequency range are all smaller than the frequencies in the second frequency range.
The first frequency band signal output unit 120 is connected to the transceiving antenna 110 to form a transmission link, and the transmission link is used for transmitting signals to be transmitted; the first frequency band signal output unit 120 is a device capable of outputting a signal of a first frequency band in the communication module, and specifically, the first frequency band signal output unit 120 is configured to output a signal of the first frequency band and transmit the signal through the transceiving antenna 110, that is, the first frequency band signal output unit 120 outputs the signal of the first frequency band, the signal is transmitted to the transceiving antenna 110 through a transmission link, and the transceiving antenna 110 transmits the signal of the first frequency band.
The second frequency band signal receiving unit 130 is connected to the transceiving antenna 110 to form a receiving link, where the receiving link is used to transmit a signal received by the transceiving antenna 110; the second frequency band signal receiving unit 130 is a device capable of inputting a signal of the first frequency band in the communication module, and specifically, the second frequency band signal receiving unit 130 is configured to receive a signal of the second frequency band output after being received by the transceiving antenna 110, that is, the transceiving antenna 110 receives the signal of the second frequency band and transmits the signal through a receiving link, and the receiving link transmits the signal of the second frequency band to the second frequency band signal receiving unit 130.
The filtering unit 140 is connected to the transmission link and is configured to filter the second harmonic of the first frequency band in the transmission link. The frequency of the first frequency band is less than the frequency of the second frequency band, and the second harmonic of the first frequency band can fall within the frequency range of the second frequency band; by connecting a filtering unit 140 to the transmitting link, the second harmonic in the first frequency band is filtered, and the second harmonic in the first frequency band in the signal transmitted by the transmitting/receiving antenna 110 is filtered as much as possible, so that the interference of the signal of the second harmonic in the transmitting/receiving antenna 110 to the signal in the second frequency band is reduced.
In the communication module, the first frequency band signal output unit 120 is connected to the transceiving antenna 110 to form a transmitting link, the second frequency band signal receiving unit 130 is connected to the transceiving antenna 110 to form a receiving link, and the transceiving antenna 110 can transmit a signal of a first frequency band and can receive a signal of a second frequency band; by connecting a filtering unit 140 to the transmitting chain, the second harmonic of the first frequency band in the transmitting chain is filtered, so that the interference of the signal of the second harmonic transmitted by the transceiving antenna 110 to the received signal of the second frequency band can be reduced, thereby reducing the signal interference.
In one embodiment, the first frequency Band is a Band3 frequency Band, and the second frequency Band is an n78 frequency Band. The frequency of the Band3 frequency Band is 1710Mhz-1784.9Mhz, and the frequency of the n78 frequency Band is 3300Mhz-4200 Mhz. The transceiving antenna 110 can transmit signals in a Band3 frequency Band and can also receive signals in an n78 frequency Band, and the second harmonic of the Band3 frequency Band can interfere with the reception of the n78 frequency Band; by connecting the filtering unit 140 to the transmitting chain, the second harmonic of the Band3 frequency Band is filtered, and the interference of the second harmonic to the reception of the n78 frequency Band is reduced.
In one embodiment, the communication module further includes a plurality of receiving antennas and a plurality of signal receiving units; the signal receiving unit is a device which can input signals in the communication module. The receiving antenna is connected with the corresponding signal receiving unit and used for outputting the received signal to the corresponding signal receiving unit. For example, the first receiving antenna is connected to the first signal receiving unit to form a first receiving chain, and the first receiving antenna transmits the received signal to the first signal receiving unit through the first receiving chain. And a plurality of receiving antennas are adopted, so that the use is convenient.
Specifically, the receiving antenna may be an antenna for receiving a signal in the second frequency band, and specifically may be an antenna for receiving a signal in the n78 frequency band, where multiple antennas are implemented to receive a signal in the n78 frequency band. Further, the number of the receiving antennas may be 3, that is, the communication module includes 4 antennas, wherein 3 receiving antennas receive signals of n78 frequency Band, and one transceiving antenna 110 is used for receiving signals of n78 frequency Band and transmitting signals of Band3 frequency Band. For example, as shown in fig. 2, RX indicates reception, the antenna ANT0 is a transmission/reception antenna 110, and the antennas ANT2, ANT3, and ANT5 are reception antennas for receiving signals in the n78 band.
In one embodiment, the filter unit 140 includes a resonant circuit having one end connected to the transmission link and the other end connected to ground.
The resonant circuit can filter out the interference frequency and reserve useful frequency components through resonance; specifically, the resonant frequency can be close to or equal to the frequency to be filtered by adjusting the parameters of the electronic element in the resonant circuit, the resonant circuit generates resonance corresponding to the resonant frequency when working, signals of the frequencies above and below the resonant frequency are short-circuited to the ground by grounding, and the frequency to be filtered is close to or equal to the resonant frequency, so that the frequency to be filtered can be filtered. The resonant circuit is added to the ground on the transmitting link of the first frequency band, and the resonant circuit is adopted for filtering, so that the device is simple and the cost is low.
In one embodiment, the resonant frequency of the resonant circuit is equal to a center point frequency in a frequency range corresponding to the second harmonic of the first frequency band. The first frequency band corresponds to a frequency range, and the second harmonic of the first frequency band also corresponds to a frequency range. The center point frequency in the frequency range corresponding to the second harmonic is a middle value of the corresponding frequency range, and may be specifically an average value of a minimum value and a maximum value of the corresponding frequency range.
By setting the resonant frequency of the resonant circuit to be equal to the center point frequency in the frequency range corresponding to the second harmonic, and the difference between the center point frequency and the minimum value and the maximum value of the corresponding frequency range is almost equal, the downward or upward floating frequency can cover the whole corresponding frequency range to a greater extent by taking the center point frequency as a base point; when the resonant circuit works, the frequencies above and below the frequency of the central point can be filtered, so that the filtered frequency can cover the frequency of the second harmonic to a greater extent, and the second harmonic is effectively filtered.
In one embodiment, the resonant circuit comprises an inductor and a capacitor, the inductor and the capacitor are connected in series, one end of the series connection is connected with the transmitting link, and the other end of the series connection is grounded. For example, as shown in fig. 2, one end of the inductor may be connected to the transmission link, the other end of the inductor may be connected to one end of the capacitor, and the other end of the capacitor may be grounded. It is understood that in other embodiments, one end of the capacitor may be connected to the transmission link, the other end of the capacitor may be connected to one end of the inductor, and the other end of the inductor may be grounded. The inductor and the capacitor are connected in series to form a resonant circuit, and the structure is simple. Specifically, the resonant frequency of the resonant circuit can be made equal to the center point frequency in the frequency range corresponding to the second harmonic of the first frequency band by selecting the inductance and the capacitance with certain parameters.
In one embodiment, the filtering unit 140 further comprises a switching circuit, and the resonant circuit is connected to the transmission link through the switching circuit. The switch circuit is used for controlling the on-off of the loop; specifically, if the switching circuit is turned on, the resonant circuit is connected to the transmission link; if the switch circuit is disconnected, the resonant circuit is not connected with the transmitting link, and the transmitting link is not filtered. By connecting the switch circuit between the transmitting link and the resonant circuit, the switch circuit is adopted to control whether the transmitting link is filtered or not, so that the filtering controllability is realized.
In one embodiment, the switch circuit comprises a controller and a single-pole single-throw switch, wherein the control end of the single-pole single-throw switch is connected with the controller, one of the movable end and the fixed end of the single-pole single-throw switch is connected with the transmitting link, and the other end of the single-pole single-throw switch is connected with the resonant circuit; that is, the moving end of the single-pole single-throw switch may be connected to the transmitting link and the stationary end may be connected to the resonant circuit, or the stationary end of the single-pole single-throw switch may be connected to the transmitting link and the moving end may be connected to the resonant circuit. As shown in fig. 3, the moving end of the single-pole single-throw switch is connected to the transmitting link, and the stationary end is connected to the inductor in the resonant circuit. The controller is adopted to control the on-off of the single-pole single-throw switch so as to realize the on-off switching of the whole switch circuit, and the method is simple and convenient.
In one embodiment, the controller controls the single-pole single-throw switch to be closed when the first frequency band and the second frequency band are combined for communication, and otherwise controls the single-pole single-throw switch to be opened. The first frequency band and the second frequency band are used for combined communication, and the controller is specifically used for directly receiving a signal for indicating the combined communication of the first frequency band and the second frequency band, or storing a program in advance, configuring when to drive the combined communication of the first frequency band and the second frequency band in the program, and controlling the single-pole single-throw switch to be turned on and turned off at other times when to drive the combined communication of the first frequency band and the second frequency band.
Because integrated devices are mostly adopted in the communication module, a group of front-end matching is commonly used in the middle and high frequency bands of 4G, if a resonance circuit is added in a transmitting link, the frequency Band close to the secondary harmonic frequency range of Band3, 3420Mhz-3569.8Mhz, is greatly influenced (for example, Band 41); as shown in fig. 4(a) and 4(b), simulation experiments are performed on two cases of connecting a resonant circuit and not connecting the resonant circuit to a transmission link, where fig. 4(a) is an experiment result of not adding the resonant circuit, fig. 4(b) is an experiment result of adding the resonant circuit, where an abscissa represents frequency and an ordinate represents difference loss, and the result shows that the difference loss of other bands of 4G increases after adding the resonant circuit, so that the addition of the resonant circuit affects the performance of other bands of 4G. By adding the single-pole single-throw switch between the resonant circuit and the transmitting link, when the first frequency band and the second frequency band work in a combined mode, the single-pole single-throw switch is controlled to be closed, and when the first frequency band and the second frequency band work in a combined mode, the single-pole single-throw switch is controlled to be in an off state, so that the influence of second harmonic waves on the second frequency band such as n78 can be reduced when the first frequency band and the second frequency band work in a combined mode, the receiving sensitivity of the second frequency band such as n78 is improved, meanwhile, the performance influence on other 4G frequency bands cannot be generated in other times, and the problem that the 4G frequency band performance is sacrificed due to the fact that the receiving sensitivity.
In one embodiment, as shown in fig. 2 and3, the communication module further includes a frequency divider 150, and the transceiver antenna 110 is connected to the first frequency band signal output unit 120 and the second frequency band signal receiving unit 130 through the frequency divider 150. The frequency divider divides the frequency of the received and transmitted signals, so that different links are adopted for transmission according to different frequency bands, and signal mixing is avoided. Specifically, the frequency divider includes a medium-high frequency port MHB and a high-high frequency port UHB, where the medium-high frequency port MHB is used to connect the transceiving antenna 110 and the first frequency band signal output unit 120, and the high-high frequency port UHB is used to connect the transceiving antenna 110 and the second frequency band signal receiving unit 130.
In one embodiment, the filtering unit 140 is connected between the frequency divider 150 and the first frequency band signal output unit 120. That is, the transmission chain includes a front-end chain between the frequency divider 150 and the first frequency band signal output unit 120, and a back-end chain between the frequency divider 150 and the transceiving antenna 110, and the filtering unit 140 is connected to the front-end chain. The signal of the first frequency band output by the first frequency band signal output unit 120 passes through the front-end link, then passes through the back-end link, and finally passes through the transmitting antenna 110, and the front-end link is connected to the filtering unit 140, so that the front-end link for signal transmission is filtered by the filtering unit 140, and the signal interference is reduced more effectively.
In one embodiment, a communication terminal is provided, comprising the communication module of any of the above embodiments. By adopting the communication module, similarly, when the first frequency band and the second frequency band are combined for communication, the signal interference to the second frequency band can be reduced, and thus the communication effect of the communication terminal is improved.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A communication module, comprising:
the receiving and transmitting antenna is used for transmitting a signal of a first frequency band and receiving a signal of a second frequency band, and the frequency of the first frequency band is less than that of the second frequency band;
the first frequency band signal output unit is connected with the transceiving antenna to form a transmitting link and used for outputting the signal of the first frequency band and transmitting the signal through the transceiving antenna;
the second frequency band signal receiving unit is connected with the transceiving antenna to form a receiving link and is used for receiving the signal of the second frequency band output after the transceiving antenna receives the signal;
and the filtering unit is connected with the transmitting link and used for filtering the second harmonic of the first frequency band in the transmitting link.
2. The communication module of claim 1, wherein the filter unit comprises a resonant circuit having one end connected to the transmit chain and the other end grounded.
3. The communication module of claim 2, wherein the resonant circuit has a resonant frequency equal to a center point frequency of the frequency range corresponding to the second harmonic of the first frequency band.
4. The communication module of claim 2, wherein the resonant circuit comprises an inductor and a capacitor, the inductor and the capacitor are connected in series, one end of the series is connected to the transmit chain, and the other end of the series is connected to ground.
5. The communication module according to any of claims 2-4, wherein the filter unit further comprises a switching circuit, the resonant circuit being connected to the transmit chain via the switching circuit.
6. The communication module of claim 5, wherein the switch circuit comprises a controller and a single-pole single-throw switch, wherein a control terminal of the single-pole single-throw switch is connected to the controller, one of a moving terminal and a stationary terminal of the single-pole single-throw switch is connected to the transmit chain, and the other is connected to the resonant circuit.
7. The communication module of claim 6, wherein the controller controls the SPDT switch to close when the first frequency band and the second frequency band are combined for communication, and otherwise controls the SPDT switch to open.
8. The communication module according to claim 1, further comprising a frequency divider, wherein the transceiver antenna is connected to the first frequency band signal output unit and the second frequency band signal receiving unit through the frequency divider.
9. The communication module according to claim 8, wherein the filter unit is connected between the frequency divider and the first frequency band signal output unit.
10. A communication terminal, characterized in that it comprises a communication module according to any one of claims 1-9.
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| CN202010953777.5A CN112202458A (en) | 2020-09-11 | 2020-09-11 | Communication module and communication terminal |
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| CN202010953777.5A CN112202458A (en) | 2020-09-11 | 2020-09-11 | Communication module and communication terminal |
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Cited By (1)
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| CN114598352A (en) * | 2022-05-07 | 2022-06-07 | 北京全路通信信号研究设计院集团有限公司 | Antenna unit |
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| CN111181590A (en) * | 2020-01-07 | 2020-05-19 | 维沃移动通信有限公司 | Radio frequency control circuit and electronic equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114598352A (en) * | 2022-05-07 | 2022-06-07 | 北京全路通信信号研究设计院集团有限公司 | Antenna unit |
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Application publication date: 20210108 |