CN112904097A - System, equipment and method for optimizing isolation of internal and external antennas - Google Patents
System, equipment and method for optimizing isolation of internal and external antennas Download PDFInfo
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Abstract
The invention provides a system for optimizing isolation of internal and external antennas, which comprises: the device comprises a control module, a main radio frequency unit, an auxiliary radio frequency unit, an external radio frequency unit, a road passing unit and an inverter unit; the main radio frequency unit is connected with a first pin of the control module; the auxiliary radio frequency unit is connected with a third pin of the control module; the external radio frequency unit is connected with a second pin of the control module; a fourth pin of the control module is connected with a first conversion circuit; a fifth pin of the control module is connected with a second conversion circuit; the channel-through unit is connected with the first conversion circuit and the second conversion circuit. The system for optimizing the isolation degree of the internal and external antennas integrates the internal and external antennas and a system for adjusting frequency bands, can switch the internal and external antennas according to requirements, enables the internal and external antennas to be switched in different frequency bands within the same time period, and is high in isolation degree between the internal and external antennas and good in received signal quality.
Description
Technical Field
The invention relates to the technical field of antenna isolation control, in particular to a system, equipment and method for optimizing isolation of an internal antenna and an external antenna.
Background
With the rapid advance of industrial design technology and the rapid change of aesthetic concepts of people, the requirements on the size and performance of the terminal ID are more and more strict, the antenna is used as one of necessary components for wireless communication, the available space size is smaller and smaller, the frequency range is more and more, and the mutual interference between the internal antenna and the external antenna is more and more serious.
The following types of products are generally available on the market:
1. only the external antenna has no internal antenna, and the defects are as follows: when the external antenna is damaged, no standby internal antenna is temporarily replaced for use, and the selection for customers is reduced;
2. only the built-in antenna has no external antenna, but the disadvantage is that when the use environment of a client is severe, the signal ratio is worse than the external antenna;
3. the existing external antenna and the internal antenna are provided, but the coupling between the internal antenna and the external antenna can cause signal interference and efficiency reduction, and the interference is weakened by increasing the physical distance of each antenna bracket in the currently adopted method, so that the size of a PCB main board and a product is increased, and the cost is greatly increased.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention provides a system for optimizing the isolation of an internal antenna and an external antenna, which can respectively control the internal main antenna, the internal auxiliary antenna and the external antenna by arranging a main radio frequency unit, an auxiliary radio frequency unit and an external radio frequency unit; the switching of the internal and external antennas can be controlled by arranging the control module; the signal frequency band of the built-in antenna can be changed by arranging the circuit-through unit and the phase inverter unit, so that the signals of the built-in antenna and the external antenna are in different frequency bands, interference between the signals is prevented, and the isolation of the built-in antenna and the external antenna is improved.
A second object of the present invention is to provide an apparatus for optimizing isolation between an internal antenna and an external antenna, in which the apparatus integrates the internal antenna and the external antenna, and can switch the antennas as needed, and the internal antenna and the external antenna have sufficient isolation therebetween, so that signal coupling between the internal antenna and the external antenna can be effectively prevented, and quality of received signals can be improved.
The third objective of the present invention is to provide a method for optimizing the isolation between internal and external antennas, which is simple to operate, and can effectively optimize the isolation between the internal and external antennas and improve the quality of received signals.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a system for optimizing isolation of internal and external antennas, which comprises: the control module is used for switching the internal and external antennas, and comprises a main radio frequency unit, an auxiliary radio frequency unit, an external radio frequency unit, a path switching unit and an inverter unit;
the main radio frequency unit is connected with a first pin of the control module; the auxiliary radio frequency unit is connected with a third pin of the control module; the external radio frequency unit is connected with a second pin of the control module; a fourth pin of the control module is connected with a first conversion circuit; a fifth pin of the control module is connected with a second conversion circuit; the channel switching unit is connected with the first conversion circuit and the second conversion circuit; the inverter unit is connected to the first conversion circuit and the second conversion circuit.
In the prior art, because coupling between the internal and external antennas can cause signal interference and efficiency reduction, the physical distance of each antenna bracket is generally increased to weaken the interference, but the size of the terminal is increased, and the manufacturing cost is increased.
In order to solve the technical problems, the invention provides a system for optimizing the isolation of internal and external antennas, which can control the switching of the internal and external antennas according to the use requirement by arranging a control module; through setting up way ware unit and phase inverter unit, can change the signal frequency channel of built-in antenna, and then changed the transmitting power of signal, make the signal of built-in antenna and external antenna be in different frequency channels, prevent to influence each other between two antennas, effectively guaranteed the isolation between built-in antenna and the external antenna.
Preferably, the main radio frequency unit is provided with a control pin, and a sixth pin of the control module is connected with the main radio frequency unit to control the level state of the control pin. By switching the level state, the work of the internal and external units, the channel unit and the inverter unit can be switched as required. Specifically, when the level state is a low level, the control module controls the external antenna to work, and the circuit breaker unit and the phase inverter unit work simultaneously to switch the frequency bands of the internal antenna, so that the internal antenna and the external antenna are in different working frequency bands, and the isolation between the internal antenna and the external antenna is effectively ensured.
Preferably, the circuit breaker unit comprises a circuit breaker module and a first capacitor; the second pin of the circuit breaker module is connected with the first pin of the first conversion circuit; a sixth pin of the circuit breaker module is connected with a second pin of the first conversion circuit; a fifth pin of the circuit breaker module is connected with a first pin of the second conversion circuit; a third pin of the circuit breaker module is connected with a second pin of the second conversion circuit; a first power supply signal is connected to an eighth pin of the circuit breaker module; the fourth pin of the circuit breaker module is grounded; one end of the first capacitor is connected with the eighth pin of the circuit breaker module, and the other end of the first capacitor is connected with the fourth pin of the circuit breaker module. A filter circuit is formed between the first capacitor and the first power supply signal, an alternating current signal in the first power supply signal can be short-circuited to the ground, and a direct current signal directly enters the pass device module to supply power.
Preferably, the circuit breaker unit further comprises a first field effect transistor, a first resistor, a second resistor, a third resistor and a fourth resistor; one end of the first resistor is connected with the control pin, and the other end of the first resistor is connected with the second pin of the first field effect transistor; one end of the second resistor is connected with the third pin of the first field effect transistor, and the other end of the second resistor is connected with a second power supply signal; one end of the third resistor is connected with the first pin of the circuit breaker module, and the other end of the third resistor is connected with the third pin of the first field-effect tube; one end of the fourth resistor is connected with the seventh pin of the circuit breaker module, and the other end of the fourth resistor is connected with the third pin of the first field-effect tube. The switch of the circuit breaker unit can be controlled through the level state of the control pin, and when the control pin is at a low level, the circuit breaker unit works; when the control pin is at a high level, the circuit breaker unit is closed.
Preferably, the inverter unit includes an inverter module and a second capacitor; a second pin of the inverter module is connected with a first pin of the first conversion circuit; a sixth pin of the inverter module is connected with a second pin of the first conversion circuit; a fifth pin of the inverter module is connected with a first pin of the second conversion circuit; a third pin of the inverter module is connected with a second pin of the second conversion circuit; a third power supply signal is connected to an eighth pin of the inverter module; a fourth pin of the phase inverter module is grounded; and one end of the second capacitor is connected with the eighth pin of the phase inverter module, and the other end of the second capacitor is connected with the fourth pin of the phase inverter module. The inverter unit can change a level state to convert a high level to a low level and a low level to a high level.
Preferably, the inverter unit further includes a fifth resistor, a sixth resistor, and a seventh resistor; one end of the fifth resistor is connected with the control pin, and the other end of the fifth resistor is connected with a fourth power supply signal; one end of the sixth resistor is connected with the first pin of the phase inverter module, and the other end of the sixth resistor is connected with the control pin; and one end of the seventh resistor is connected with the seventh pin of the phase inverter module, and the other end of the seventh resistor is connected with the control pin. The switch of the inverter unit can be controlled through the level state of the control pin, and when the control pin is at a low level, the inverter unit works; when the control pin is high, the inverter unit is turned off.
Preferably, the system of the present invention further comprises a built-in main antenna tuning circuit; the built-in main antenna tuning circuit comprises a main antenna tuning module, and a fifth pin of the main antenna tuning module is connected with a second pin of the first switching circuit; and a sixth pin of the main antenna tuning module is connected with a second pin of the second switching circuit.
Preferably, the system of the present invention further comprises a built-in auxiliary antenna tuning circuit; the built-in auxiliary antenna tuning circuit comprises an auxiliary antenna tuning module, and a fifth pin of the auxiliary antenna tuning module is connected with a second pin of the first switching circuit; and a sixth pin of the auxiliary antenna tuning module is connected with a second pin of the second switching circuit.
The invention also provides a device for optimizing the isolation of the internal and external antennas, which comprises: the antenna comprises a shell, an external antenna, an internal main antenna and an internal auxiliary antenna; the external antenna is arranged outside the shell; the built-in main antenna and the built-in auxiliary antenna are arranged inside the shell; the shell is also internally provided with a control chip, and the system is integrated on the control chip; the system is respectively connected with the external antenna, the internal main antenna and the internal auxiliary antenna to control the switching of the antennas.
In the prior art, a terminal device generally only adopts an internal antenna or an external antenna, thereby bringing about the following problems: when only the external antenna is used, the external antenna is broken, and no standby internal antenna is used for temporary replacement; when only the built-in antenna is used, it cannot be used in a severe environment.
In order to solve the technical problem, the invention provides a device which is integrated with an internal antenna and an external antenna and can be switched according to requirements; and the isolation between the built-in antenna and the external antenna is optimized and adjusted through the circuit system, the size of equipment does not need to be increased, the signal quality is guaranteed, and the cost is saved.
The invention also provides a method for optimizing the isolation of the internal and external antennas, which applies the system and comprises the following steps:
detecting the level state of a control pin; switching the internal and external antennas according to the level state; when the antenna is switched to the external antenna, the signal frequency band of the internal antenna is changed to improve the isolation of the internal antenna and the external antenna.
The method of the invention has simple operation, effectively optimizes the isolation between the internal and external antennas and has good received signal quality.
Compared with the prior art, the invention has the beneficial effects that:
(1) the system can respectively control the built-in main antenna, the built-in auxiliary antenna and the external antenna by arranging the main radio frequency unit, the auxiliary radio frequency unit and the external radio frequency unit;
(2) the switching of the internal and external antennas can be controlled by arranging the control module;
(3) the signal frequency band of the built-in antenna can be changed by arranging the circuit-through unit and the phase inverter unit, so that the signals of the built-in antenna and the external antenna are in different frequency bands, interference between the signals is prevented, and the isolation of the built-in antenna and the external antenna is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a system for optimizing isolation between internal and external antennas according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a circuit breaker unit provided in the embodiment of the present invention;
FIG. 3 is a circuit diagram of an inverter unit according to an embodiment of the present invention;
fig. 4-5 are schematic circuit diagrams of a main rf unit according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of an external rf unit according to an embodiment of the present invention;
fig. 7 is a circuit diagram of an auxiliary rf unit according to an embodiment of the present invention;
FIG. 8 is a circuit diagram of a first converting circuit according to an embodiment of the present invention;
FIG. 9 is a circuit diagram of a second conversion circuit according to an embodiment of the present invention;
FIG. 10 is a circuit diagram of a power supply circuit according to an embodiment of the present invention;
fig. 11 is a circuit diagram of a built-in main antenna tuning circuit according to an embodiment of the present invention;
fig. 12 is a circuit diagram of a tuning circuit with an auxiliary antenna provided therein according to an embodiment of the present invention;
FIG. 13 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
fig. 14 is a flowchart of a method for optimizing the isolation between internal and external antennas according to an embodiment of the present invention.
Description of the drawings:
10-a housing; 20-an external antenna;
30-a control chip; 301-a control module;
302-a main radio frequency unit; 303-external radio frequency unit;
304-an auxiliary radio frequency unit; 305-a first conversion circuit;
306-a second conversion circuit; 307-a passer unit;
308-an inverter cell; 40-built-in main antenna;
50-built-in auxiliary antenna.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly illustrate the technical solution of the present invention, the following description is made in the form of specific embodiments.
Examples
Referring to fig. 1-14, the present embodiment provides a system for optimizing isolation between internal and external antennas, including: a control module 301 for switching an internal antenna and an external antenna, a main radio frequency unit 302, an auxiliary radio frequency unit 304, an external radio frequency unit 303, a circuit breaker unit 307 and an inverter unit 308;
as shown in fig. 1, the master rf unit 302 is connected to a first pin ANT _ MAIN of the control module 301; the auxiliary rf unit 304 is connected to the third pin ANT _ DIV of the control module 301, and in fact, the auxiliary rf unit 304 is connected to the pass unit 307 and the inverter unit 308 through the ANT _ DIV; the external radio frequency unit 303 is connected with a second pin ANT _ GPS of the control module 301; the fourth pin GPIO _ ANT1 of the control module 301 is connected to a first conversion circuit 305; the fifth pin GPIO _ ANT2 of the control module 301 is connected to a second conversion circuit 306; the circuit breaker unit 307 is connected to the first conversion circuit 305 and the second conversion circuit 306; the inverter unit 308 is connected to the first conversion circuit 305 and the second conversion circuit 306.
The master rf unit 302 is provided with a control pin ANT _ SW, and a sixth pin LTE _ ANT _ SW of the control module 301 is connected to the master rf unit 302 to control a level state of the control pin ANT _ SW. By switching the level state, the operations of the internal and external units, the pass device unit 307, and the inverter unit 308 can be switched as necessary. Specifically, when the level state is a low level, the control module 301 controls the external antenna to operate, and the circuit breaker unit 307 and the phase inverter unit 308 operate at the same time, so as to switch the frequency bands of the internal antenna, so that the internal antenna and the external antenna are in different operating frequency bands, thereby effectively ensuring the isolation between the internal antenna and the external antenna. The circuitry of the main rf unit 302 is shown in fig. 4-5.
As shown in fig. 2, the passer unit 307 comprises a passer module U508 and a first capacitance C546; the second pin of the circuit breaker module is connected with the first pin ANT1 of the first conversion circuit 305; the sixth pin of the circuit breaker module is connected with the second pin ANT Y1 of the first conversion circuit 305; the fifth pin of the circuit breaker module is connected with the first pin ANT2 of the second conversion circuit 306; the third pin of the circuit breaker module is connected with the second pin ANT Y2 of the second conversion circuit 306; a first power supply signal is connected to an eighth pin of the circuit breaker module; the fourth pin of the circuit breaker module is grounded; one end of the first capacitor C546 is connected to the eighth pin of the passer module U508, and the other end is connected to the fourth pin of the passer module U508. The first capacitor C546 and the first power signal form a filter circuit therebetween, so that an alternating current signal in the first power signal can be shorted to the ground, and a direct current signal directly enters the pass device module for power supply.
The circuit breaker unit 307 further comprises a first field effect transistor Q500, a first resistor R520, a second resistor R521, a third resistor R522 and a fourth resistor R523; one end of the first resistor R520 is connected with the control pin ANT _ SW, and the other end of the first resistor R is connected with the second pin of the first field-effect transistor Q500; one end of the second resistor R521 is connected with the third pin of the first field-effect transistor Q500, and the other end of the second resistor R521 is connected with a second power supply signal; one end of the third resistor R522 is connected with the first pin of the circuit breaker module U508, and the other end of the third resistor R522 is connected with the third pin of the first field-effect transistor Q500; one end of the fourth resistor R523 is connected to the seventh pin of the circuit breaker module U508, and the other end is connected to the third pin of the first fet Q500. The switch of the circuit breaker unit 307 can be controlled by controlling the level state of the pin ANT _ SW, and when the control pin ANT _ SW is at a low level, the circuit breaker unit 307 works; when the control pin ANT _ SW is at a high level, the bypass unit 307 is turned off.
As shown in fig. 3, the inverter unit 308 includes an inverter module U507 and a second capacitor C547; a second pin of the inverter module U507 is connected to a first pin ANT1 of the first conversion circuit 305; the sixth pin of the inverter module U507 is connected to the second pin ANT Y1 of the first conversion circuit 305; the fifth pin of the inverter module U507 is connected to the first pin ANT2 of the second conversion circuit 306; the third pin of the inverter module U507 is connected to the second pin ANT Y2 of the second conversion circuit 306; a third power supply signal is connected to an eighth pin of the inverter module U507; the fourth pin of the inverter module U507 is grounded; one end of the second capacitor is connected with the eighth pin of the inverter module U507, and the other end of the second capacitor is connected with the fourth pin of the inverter module U507. The inverter unit 308 can change a level state to convert a high level to a low level and a low level to a high level.
The inverter unit 308 further includes a fifth resistor R526, a sixth resistor R524, and a seventh resistor R525; one end of the fifth resistor R526 is connected with the control pin ANT _ SW, and the other end of the fifth resistor R is connected with a fourth power supply signal; one end of the sixth resistor R524 is connected to the first pin of the inverter module U507, and the other end is connected to the control pin ANT _ SW; one end of the seventh resistor R525 is connected to the seventh pin of the inverter module U507, and the other end is connected to the control pin ANT _ SW. The switch of the inverter unit 308 can be controlled by the level state of the control pin, and when the control pin ANT _ SW is at a low level, the inverter unit 308 operates; when the control pin ANT _ SW is at a high level, the inverter unit 308 is turned off.
As shown in fig. 11, the system of this embodiment further includes a built-in main antenna tuning circuit, which includes a main antenna tuning module U505, and a fifth pin VCTL1 of the main antenna tuning module U505 is connected to a second pin ANT Y1 of the first converting circuit 305; the sixth pin VCTL2 of the main antenna tuning module U505 is connected to the second pin ANT Y2 of the second switching circuit 306.
As shown in fig. 12, the system of the present embodiment further includes a built-in auxiliary antenna tuning circuit; the built-in auxiliary antenna tuning circuit comprises an auxiliary antenna tuning module U503, and a fifth pin VCTL1 of the auxiliary antenna tuning module U503 is connected to a second pin ANT Y1 of the first conversion circuit 305; the sixth pin VCTL2 of the auxiliary antenna tuning module U503 is connected to the second pin ANT Y2 of the second switching circuit 306.
In this embodiment, the first power signal, the second power signal, the third power signal, and the fourth power signal are all connected to the power supply through the power supply circuit, and the power supply circuit is as shown in fig. 10.
It should be noted by those skilled in the art that the specific circuit connections of the main rf unit, the auxiliary rf unit, the external rf unit, the internal main antenna tuning circuit, the internal auxiliary antenna tuning circuit, the first converting circuit, the second converting circuit, and the power supply circuit used in this embodiment are all the prior art, and therefore, the circuits thereof are not described in detail in this embodiment.
As shown in fig. 13, this embodiment further provides an apparatus for optimizing the isolation between internal and external antennas, including: a housing 10, an external antenna 20, an internal main antenna 40 and an internal auxiliary antenna 50; the external antenna 20 is arranged outside the shell 10; the built-in main antenna 40 and the built-in auxiliary antenna 50 are disposed inside the housing 10; the casing 10 is further provided with a control chip 30, the above-mentioned system is integrated on the control chip 30, and the system is respectively connected with the external antenna 20, the internal main antenna 40 and the internal auxiliary antenna 50 to control the switching of the antennas. Specifically, the external antenna 20 is connected through the external rf unit 303, the internal main antenna 40 is connected through the main rf unit 302, and the internal auxiliary antenna 50 is connected through the auxiliary rf unit 304.
As shown in fig. 14, when the system for optimizing the isolation between the internal and external antennas is used, the control module 301 detects the level state of the control pin ANT _ SW; switching the internal and external antennas according to the level state; when the antenna is switched to the external antenna, the signal frequency band of the internal antenna is changed to improve the isolation of the internal antenna and the external antenna. Specifically, when the control pin ANT _ SW is at a low level, the control pin ANT _ SW is switched to an external antenna, and the pass unit 307 and the inverter unit 308 are triggered to operate, when the external antenna 20 transmits power, the levels of the GPIO _ ANT1 and the GPIO _ ANT2 are both at a high level, after passing through the pass unit 307 and the inverter unit 308, the levels of the ANT Y1 and the ANT Y2 are both at a low level, and at this time, the frequency band of the internal antenna changes to a frequency band different from that of the external antenna 20, so that the function of improving the isolation performance is achieved.
The following table is a frequency Band mapping table of the main antenna tuning module U505 and the auxiliary antenna tuning module U503, the main antenna tuning module U505 and the auxiliary antenna tuning module U503 are antenna tuning switches, and the frequency Band wavelength Band is controlled by the levels of VCTL1 and VCTL 2. The main antenna tuning module U505 and the auxiliary antenna tuning module U503 are both semiconductor material SP 4T.
Frequency band corresponding table
When the LTE Band71 transmits power, the levels of GPIO _ ANT1 and GPIO _ ANT2 are both high level, after passing through a pass-through and an inverter, ANT Y1 and ANT Y2 are both low level, and then the frequency Band of the built-in antenna is LTE Band 2/LTE Band 4/LTE Band 5/LTE Band 66; at the moment, the function of improving the isolation performance is achieved; when the LTE Band13 transmits power, the levels of GPIO _ ANT1 and GPIO _ ANT2 are high and low, respectively; after passing through the pass filter and the inverter, ANT Y1 and ANT Y2 both become low and high level, and are switched to LTE Band 12, so that the interference of LTE Band13 double frequency to AGPS performance is optimized.
In a word, the system for optimizing the isolation of the internal and external antennas integrates the internal and external antennas and the system for adjusting the frequency band, can switch the internal and external antennas according to the requirements, enables the internal and external antennas to be switched in different frequency bands in the same time period, and has high isolation between the internal and external antennas and good received signal quality.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A system for optimizing isolation of internal and external antennas, comprising: the control module is used for switching the internal and external antennas, and comprises a main radio frequency unit, an auxiliary radio frequency unit, an external radio frequency unit, a path switching unit and an inverter unit;
the main radio frequency unit is connected with a first pin of the control module; the auxiliary radio frequency unit is connected with a third pin of the control module; the external radio frequency unit is connected with a second pin of the control module; a fourth pin of the control module is connected with a first conversion circuit; a fifth pin of the control module is connected with a second conversion circuit; the channel switching unit is connected with the first conversion circuit and the second conversion circuit; the inverter unit is connected to the first conversion circuit and the second conversion circuit.
2. The system for optimizing isolation between internal and external antennas of claim 1, wherein a control pin is disposed on the main rf unit, and a sixth pin of the control module is connected to the main rf unit to control a level state of the control pin.
3. The system for optimizing the isolation of the internal and external antennas as claimed in claim 2, wherein the circulator unit comprises a circulator module and a first capacitor; the second pin of the circuit breaker module is connected with the first pin of the first conversion circuit; a sixth pin of the circuit breaker module is connected with a second pin of the first conversion circuit; a fifth pin of the circuit breaker module is connected with a first pin of the second conversion circuit; a third pin of the circuit breaker module is connected with a second pin of the second conversion circuit; a first power supply signal is connected to an eighth pin of the circuit breaker module; the fourth pin of the circuit breaker module is grounded; one end of the first capacitor is connected with the eighth pin of the circuit breaker module, and the other end of the first capacitor is connected with the fourth pin of the circuit breaker module.
4. The system for optimizing the isolation between the internal antenna and the external antenna as claimed in claim 3, wherein the circulator unit further comprises a first field effect transistor, a first resistor, a second resistor, a third resistor and a fourth resistor; one end of the first resistor is connected with the control pin, and the other end of the first resistor is connected with the second pin of the first field effect transistor; one end of the second resistor is connected with the third pin of the first field effect transistor, and the other end of the second resistor is connected with a second power supply signal; one end of the third resistor is connected with the first pin of the circuit breaker module, and the other end of the third resistor is connected with the third pin of the first field-effect tube; one end of the fourth resistor is connected with the seventh pin of the circuit breaker module, and the other end of the fourth resistor is connected with the third pin of the first field-effect tube.
5. The system for optimizing isolation between internal and external antennas of claim 2, wherein the inverter unit comprises an inverter module and a second capacitor; a second pin of the inverter module is connected with a first pin of the first conversion circuit; a sixth pin of the inverter module is connected with a second pin of the first conversion circuit; a fifth pin of the inverter module is connected with a first pin of the second conversion circuit; a third pin of the inverter module is connected with a second pin of the second conversion circuit; a third power supply signal is connected to an eighth pin of the inverter module; a fourth pin of the phase inverter module is grounded; and one end of the second capacitor is connected with the eighth pin of the phase inverter module, and the other end of the second capacitor is connected with the fourth pin of the phase inverter module.
6. The system for optimizing isolation between internal and external antennas of claim 5, wherein the inverter unit further comprises a fifth resistor, a sixth resistor and a seventh resistor; one end of the fifth resistor is connected with the control pin, and the other end of the fifth resistor is connected with a fourth power supply signal; one end of the sixth resistor is connected with the first pin of the phase inverter module, and the other end of the sixth resistor is connected with the control pin; and one end of the seventh resistor is connected with the seventh pin of the phase inverter module, and the other end of the seventh resistor is connected with the control pin.
7. The system for optimizing isolation between internal and external antennas of claim 1, further comprising an internal main antenna tuning circuit; the built-in main antenna tuning circuit comprises a main antenna tuning module, and a fifth pin of the main antenna tuning module is connected with a second pin of the first switching circuit; and a sixth pin of the main antenna tuning module is connected with a second pin of the second switching circuit.
8. The system for optimizing isolation between internal and external antennas of claim 1, further comprising an internal auxiliary antenna tuning circuit; the built-in auxiliary antenna tuning circuit comprises an auxiliary antenna tuning module, and a fifth pin of the auxiliary antenna tuning module is connected with a second pin of the first switching circuit; and a sixth pin of the auxiliary antenna tuning module is connected with a second pin of the second switching circuit.
9. An apparatus for optimizing isolation of internal and external antennas, comprising: the antenna comprises a shell, an external antenna, an internal main antenna and an internal auxiliary antenna; the external antenna is arranged outside the shell; the built-in main antenna and the built-in auxiliary antenna are arranged inside the shell; the shell is also internally provided with a control chip, and the control chip is integrated with the system as claimed in any one of claims 1 to 8, and the system is respectively connected with the external antenna, the internal main antenna and the internal auxiliary antenna to control the switching of the antennas.
10. A method for optimizing isolation between internal and external antennas, wherein the system of any of claims 1-8 is applied, comprising:
detecting the level state of a control pin; switching the internal and external antennas according to the level state; when the antenna is switched to the external antenna, the signal frequency band of the internal antenna is changed to improve the isolation of the internal antenna and the external antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110346655.4A CN112904097A (en) | 2021-03-31 | 2021-03-31 | System, equipment and method for optimizing isolation of internal and external antennas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110346655.4A CN112904097A (en) | 2021-03-31 | 2021-03-31 | System, equipment and method for optimizing isolation of internal and external antennas |
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| CN112904097A true CN112904097A (en) | 2021-06-04 |
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| CN202110346655.4A Pending CN112904097A (en) | 2021-03-31 | 2021-03-31 | System, equipment and method for optimizing isolation of internal and external antennas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102594383A (en) * | 2011-12-31 | 2012-07-18 | 中兴通讯股份有限公司 | Realization method and device of internal antennas of mobile television and FM (Frequency Modulation) receiver |
| WO2013131230A1 (en) * | 2012-03-05 | 2013-09-12 | 华为终端有限公司 | Antenna switching circuit and wireless terminal device |
| CN204332053U (en) * | 2014-12-30 | 2015-05-13 | 浙江威星智能仪表股份有限公司 | A kind of double antenna wireless remote installed meter |
| CN107039754A (en) * | 2017-04-20 | 2017-08-11 | 深圳市拓频通讯设备有限公司 | A kind of mobile phone loss prevention external antenna |
| CN214750576U (en) * | 2021-03-31 | 2021-11-16 | 德明通讯（上海）股份有限公司 | System and equipment for optimizing isolation of internal and external antennas |
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2021
- 2021-03-31 CN CN202110346655.4A patent/CN112904097A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594383A (en) * | 2011-12-31 | 2012-07-18 | 中兴通讯股份有限公司 | Realization method and device of internal antennas of mobile television and FM (Frequency Modulation) receiver |
| WO2013131230A1 (en) * | 2012-03-05 | 2013-09-12 | 华为终端有限公司 | Antenna switching circuit and wireless terminal device |
| CN204332053U (en) * | 2014-12-30 | 2015-05-13 | 浙江威星智能仪表股份有限公司 | A kind of double antenna wireless remote installed meter |
| CN107039754A (en) * | 2017-04-20 | 2017-08-11 | 深圳市拓频通讯设备有限公司 | A kind of mobile phone loss prevention external antenna |
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