CN112350689A - Ultra-wideband digital control phase shifting device and phase control method - Google Patents
Ultra-wideband digital control phase shifting device and phase control method Download PDFInfo
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- CN112350689A CN112350689A CN202011195638.7A CN202011195638A CN112350689A CN 112350689 A CN112350689 A CN 112350689A CN 202011195638 A CN202011195638 A CN 202011195638A CN 112350689 A CN112350689 A CN 112350689A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/08—Networks for phase shifting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides an ultra-wideband digital control phase shifting device and a phase control method. The device comprises a processing module and a phase shifting module which are connected with each other, wherein the phase shifting module comprises a plurality of phase shifting units, and the positions of any phase shifting unit or any phase shifting unit and the processing module can be interchanged; the processing module comprises a power divider, two digital variable gain amplifiers and a 3dB coupler, wherein the output ends of the power divider are respectively connected with the digital variable gain amplifiers, the output ends of the digital variable gain amplifiers are connected with the 3dB coupler, the 3dB coupler comprises two output ends, the first output end is grounded, and the second output end is used as the output end of the first module; the phase shift unit comprises a phase shifter and switches connected in parallel at two ends of the phase shifter. In this way, the advantages of the active phase shifter and the passive phase shifter can be combined, the phase shifting precision can be controlled by adopting a digital control mode, and the method has the advantages of low power consumption, low loss, high precision and flexible use.
Description
Technical Field
Embodiments of the present invention relate generally to the field of phase control, and more particularly, to an ultra-wideband digitally controlled phase shifting apparatus and a phase control method.
Background
The phased array is a key technology of modern radars and 5G, the phased array radar utilizes a plurality of antenna units to form an antenna array, and the phase distribution of antenna array feed signals is changed by controlling the working state of a phase shifter, so that space beam scanning is realized. As a core device of a phased array, a phase shifter needs to meet requirements of high precision, low loss, miniaturization and the like.
Common phase shifters are classified into a passive phase shifter and an active phase shifter, and the passive phase shifter is simple in structure, low in power consumption, large in area and large in insertion loss; the active phase shifter has the advantages of small area, small insertion loss, easy integration and high power consumption. The disadvantages of both passive and active phase shifters are significant, and there is no phase shifting apparatus and phase control method that can combine the advantages of both phase shifters.
Disclosure of Invention
In a first aspect of the invention, an ultra-wideband digitally controlled phase shifting device is provided. The device includes:
the phase shift module comprises a plurality of phase shift units, wherein the positions of any phase shift unit or any phase shift unit and the processing module can be interchanged;
the processing module comprises a power divider, two digital variable gain amplifiers and a 3dB coupler, wherein the power divider is a one-to-two power divider, the output ends of the power divider are respectively connected with one digital variable gain amplifier, the output end of each digital variable gain amplifier is connected with the 3dB coupler, the 3dB coupler comprises two output ends, the first output end is grounded, and the second output end is used as the output end of the first module;
the phase shifting unit comprises a phase shifter and switches connected in parallel at two ends of the phase shifter.
Furthermore, the phase shift module comprises three identical phase shift units, each phase shift unit is a 90-degree phase shifter, and two ends of each 90-degree phase shifter are connected with a switch in parallel; or
The phase shifting module comprises two phase shifting units, wherein one phase shifting unit is a 90-degree phase shifter, and two ends of the 90-degree phase shifter are connected with a switch in parallel; the other phase shifting unit is a 180-degree phase shifter, and two ends of the 180-degree phase shifter are connected with a switch in parallel.
Further, the output end of the power divider outputs two paths of signals with the same amplitude and phase or with the same amplitude and opposite phase.
Further, the digital variable gain amplifier is configured to adjust an amplitude of a signal output by the power divider, and output the adjusted signal to the 3dB coupler.
Further, the 3dB coupler is configured to couple output signals of the two digital variable gain amplifiers to obtain a signal with an arbitrary phase in one quadrant.
Further, the signal of any phase in the quadrant is:
Z＝X+jY
wherein Z is a coupled signal in a complex form; x and Y are two paths of adjusted signals respectively.
Further, still include:
in the phase shifting module, when the switch is closed, the phase shifter connected in parallel with the switch is in a short-circuit state, and the signal of the output end of the current module is the same as the signal of the input end;
when the switch is switched off, the phase shifter connected in parallel with the switch is in a working state, so that the signal at the input end of the current module is output from the output end after phase shift.
In a second aspect of the invention, a phase control method is provided. The method comprises the following steps:
respectively carrying out first processing and second processing on the input signal to obtain an output signal;
the first processing includes:
receiving an input signal, dividing the input signal into two paths of signals through a one-to-two power divider, and outputting the two paths of signals to a digital variable gain amplifier;
adjusting the amplitudes of the two paths of signals through a digital variable gain amplifier to obtain two paths of adjusted signals, and outputting the two paths of adjusted signals to a 3dB coupler;
coupling the two paths of adjusted signals through a 3dB coupler to obtain signals of any phase in one quadrant;
the second processing includes: the input signal is phase shifted.
Further, the phase shifting the input signal includes:
the working state of the phase shifter is controlled by controlling switches connected in parallel at two ends of the phase shifter, and an input signal is input into one or more phase shifters in the working state to shift the phase.
Further, the controlling the operating state of the phase shifter by controlling switches connected in parallel at two ends of the phase shifter includes:
when the switch is closed, the phase shifter connected in parallel with the switch is in a short-circuit state, and the signal of the output end of the current module is the same as the signal of the input end;
when the switch is switched off, the phase shifter connected in parallel with the switch is in a working state, so that the signal at the input end of the current module is output from the output end after phase shift.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
The invention can combine the advantages of the active phase shifter and the passive phase shifter, adopts a digital control mode, controls the phase shifting precision through the digital variable gain amplifier, can change the cascade order according to the link condition, and has the advantages of low power consumption, low insertion loss, high precision and flexible use.
Drawings
The above and other features, advantages and aspects of various embodiments of the present invention will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
fig. 1 shows a schematic structural diagram of an ultra-wideband digitally controlled phase shifter according to an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of an ultra-wideband digitally controlled phase shifter according to another embodiment of the present invention;
fig. 3 shows a schematic structural diagram of an ultra-wideband digitally controlled phase shifter according to another embodiment of the present invention;
fig. 4 shows a schematic structural diagram of an ultra-wideband digitally controlled phase shifter according to another embodiment of the present invention;
FIG. 5 shows a flow chart of a phase control method according to an embodiment of the invention;
wherein, 1 is a processing module, 2 is a first phase shift unit, 3 is a second phase shift unit, and 4 is a third phase shift unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The invention is suitable for single-ended and differential structures, can combine the advantages of an active phase shifter and a passive phase shifter, adopts a digital control mode, controls the phase shifting precision through a digital variable gain amplifier, can change the cascade sequence according to the link condition, and has the advantages of low power consumption, low insertion loss, high precision and flexible use.
Fig. 1 shows a schematic structural diagram of an ultra-wideband digitally controlled phase shifter according to an embodiment of the present invention.
The device comprises a processing module and a phase shifting module, wherein the processing module is connected with the phase shifting module, the phase shifting module comprises a plurality of phase shifting units, and the positions of any phase shifting unit or any phase shifting unit and the processing module can be interchanged.
As an embodiment of the present invention, the phase shift module includes three identical phase shift units, each of the phase shift units is a 90-degree phase shifter, and two ends of the 90-degree phase shifter are connected in parallel with a switch.
In the phase shift module, the input end and the output end of the first phase shift unit, the second phase shift unit, the third phase shift unit and the processing module are connected, and the positions of the first phase shift unit, the second phase shift unit, the third phase shift unit and the processing module can be exchanged to be connected, for example: the output end of the processing module is connected to the input end of the first phase shifting unit, the output end of the first phase shifting unit is connected to the input end of the second phase shifting unit, and the output end of the second phase shifting unit is connected to the input end of the third phase shifting unit, as shown in fig. 1.
In the above embodiment, if the processing module and one of the phase shifting units are interchanged, the phase shifting purpose can also be achieved, as shown in fig. 2, an output end of the first phase shifting unit is connected to an input end of the second phase shifting unit, an output end of the second phase shifting unit is connected to an input end of the processing module, and an output end of the processing module is connected to an input end of the third phase shifting unit.
In this embodiment, the 90-degree phase shifters adopt a passive structure, and the number selection signals turned on and turned off by the switches are phase-shifted by several 90-degree phase shifters to select a quadrant of the output signal. The method specifically comprises the following steps:
when a switch of one of the first phase shifting unit, the second phase shifting unit and the third phase shifting unit is switched on, the 90-degree phase shifter of the phase shifting unit is short-circuited, and signals are directly connected; when a switch of one of the first phase shifting unit, the second phase shifting unit and the third phase shifting unit is switched off, the 90-degree phase shifter of the phase shifting unit works, and a signal is subjected to 90-degree phase shift. When the switches in the first phase shifting unit, the second phase shifting unit and the third phase shifting unit are all switched off, the phase shifter forms 360-degree omnibearing phase shift.
In the above embodiment, a phase shift module including three 90-degree phase shifters is provided to realize 360-degree omni-directional phase shift, and in another embodiment, three 90-degree phase shifters may be replaced with one 90-degree phase shifter and one 180-degree phase shifter to realize 360-degree omni-directional phase shift.
As another embodiment of the present invention, the phase shift module includes two phase shift units, wherein the first phase shift unit includes a 90-degree phase shifter, and two ends of the 90-degree phase shifter are connected in parallel with a switch; the second phase shifting unit comprises a 180-degree phase shifter, and a switch is connected in parallel with two ends of the 180-degree phase shifter.
In this embodiment, as shown in fig. 3, an output end of the processing module is connected to an input end of the first phase shifting unit, and an output end of the first phase shifting unit is connected to an input end of the second phase shifting unit.
In the above embodiment, if the processing module and one of the phase shifting units are interchanged, the phase shifting purpose can also be achieved, as shown in fig. 4, the output end of the first phase shifting unit is connected to the input end of the processing module, and the output end of the processing module is connected to the input end of the second phase shifting unit.
In this embodiment, both the 90-degree phase shifter and the 180-degree phase shifter adopt passive structures, and the number of the signals switched on and off is selected through the phase shift of the 90-degree phase shifter and/or the phase shift of the 180-degree phase shifter, so as to select the quadrant of the output signal. The method specifically comprises the following steps:
when the switch of one of the first phase shifting unit and the second phase shifting unit is conducted, the phase shifter of the phase shifting unit is short-circuited, and signals are straight; when a switch of one of the first phase shifting unit and the second phase shifting unit is switched off, a phase shifter of the phase shifting unit works, and if the current phase shifter is a 90-degree phase shifter, a signal is subjected to 90-degree phase shifting; if the current phase shifter is a 180 degree phase shifter, the signal is 180 degree phase shifted. When the switches in the first phase shifting unit and the second phase shifting unit are both off, the phase shifter forms 360-degree omni-directional phase shift.
In some embodiments, the processing module includes a power divider, two digital variable gain amplifiers, and a 3dB coupler, where the power divider is a one-to-two power divider and is configured to generate two paths of signals with the same amplitude, the same phase, or the same amplitude, and 180 degrees of phase difference; it can be made in any form, such as balun, etc.
The power divider is divided into two output ends, and the output ends of the power divider are respectively connected with a digital variable gain amplifier. The digital variable gain amplifier is used for adjusting the amplitude of the signal output by the power divider, for example, adjusting the amplitudes of the two input signals to X and Y, respectively. The digital variable gain amplifier may be configured in a common source structure, a gilbert cell structure, or other forms.
The phase shift precision can be controlled through the digital variable gain amplifier, and the phase shift precision is improved.
And the output end of the digital variable gain amplifier is connected with the 3dB coupler, and the adjusted signal is output to the 3dB coupler. The 3dB coupler comprises two output terminals, wherein a first output terminal is connected to one end of a resistor, the other end of the resistor is grounded, and the resistor is, for example, a 50 Ω resistor; the second output end is used as the output end of the first module. The 3dB coupler is used for combining two paths of input signals X and Y into a signal Z (X + jY) with an arbitrary phase in a quadrant 90 degrees. Wherein Z is a coupled signal in a complex form; x and Y are two paths of adjusted signals respectively. The 3dB coupler may be, for example, a coupled line coupler, a Lange coupler, etc., or may take other forms.
The above is a description of an embodiment of the apparatus, and the following is a further description of the solution according to the invention by way of an embodiment of the method.
As shown in fig. 5, the phase control method of the phase shifting apparatus includes:
and respectively carrying out first processing and second processing on the input signal to obtain an output signal.
Wherein the first processing includes:
receiving an input signal, dividing the input signal into two paths of signals through a one-to-two power divider, and outputting the two paths of signals to a digital variable gain amplifier;
adjusting the amplitudes of the two paths of signals through a digital variable gain amplifier to obtain two paths of adjusted signals, and outputting the two paths of adjusted signals to a 3dB coupler;
and coupling the two paths of adjusted signals through a 3dB coupler to obtain signals of any phase in one quadrant.
The second processing includes phase shifting the input signal, and specifically includes:
the working state of the phase shifter is controlled by controlling switches connected in parallel at two ends of the phase shifter, and an input signal is input into one or more phase shifters in the working state to shift the phase.
When the switch is closed, the phase shifter connected in parallel with the switch is in a short-circuit state, and the signal of the output end of the current module is the same as the signal of the input end;
when the switch is switched off, the phase shifter connected in parallel with the switch is in a working state, so that the signal at the input end of the current module is output from the output end after phase shift.
The first and second processes described above can be interchanged in logical position.
The invention can combine the advantages of the active phase shifter and the passive phase shifter, adopts a digital control mode, controls the phase shifting precision through the digital variable gain amplifier, can change the cascade sequence according to the link condition, and has the advantages of low power consumption, low loss, high precision and flexible use
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (10)
1. An ultra-wideband digitally controlled phase shifting device, comprising: the phase shift module comprises a plurality of phase shift units, wherein the positions of any phase shift unit or any phase shift unit and the processing module can be interchanged;
the processing module comprises a power divider, two digital variable gain amplifiers and a 3dB coupler, wherein the power divider is a one-to-two power divider, the output ends of the power divider are respectively connected with one digital variable gain amplifier, the output end of each digital variable gain amplifier is connected with the 3dB coupler, the 3dB coupler comprises two output ends, the first output end is grounded, and the second output end is used as the output end of the first module;
the phase shifting unit comprises a phase shifter and switches connected in parallel at two ends of the phase shifter.
2. The ultra-wideband digital control phase shifting device according to claim 1, wherein the phase shifting module comprises three identical phase shifting units, each phase shifting unit is a 90-degree phase shifter, and two ends of the 90-degree phase shifter are connected in parallel with a switch; or
The phase shifting module comprises two phase shifting units, wherein one phase shifting unit is a 90-degree phase shifter, and two ends of the 90-degree phase shifter are connected with a switch in parallel; the other phase shifting unit is a 180-degree phase shifter, and two ends of the 180-degree phase shifter are connected with a switch in parallel.
3. The ultra-wideband digitally controlled phase shifting apparatus according to claim 1, wherein the output end of the power divider outputs two paths of signals with the same amplitude and phase or with the same amplitude and phase opposite to each other.
4. The ultra-wideband digitally controlled phase shifting device according to claim 1, wherein the digital variable gain amplifier is configured to adjust the amplitude of the signal outputted from the power divider and output the adjusted signal to the 3dB coupler.
5. The ultra-wideband digitally controlled phase shifting device of claim 1, wherein said 3dB coupler is configured to couple the output signals of said two digital variable gain amplifiers to obtain a signal with any phase in one quadrant.
6. The ultra-wideband digitally controlled phase shifting device of claim 5, wherein the signal of any phase in said one quadrant is:
Z＝X+jY
wherein Z is a coupled signal in a complex form; x and Y are two paths of adjusted signals respectively.
7. The ultra-wideband digitally controlled phase shifting device of claim 1, further comprising:
in the phase shifting module, when the switch is closed, the phase shifter connected in parallel with the switch is in a short-circuit state, and the signal of the output end of the current module is the same as the signal of the input end;
when the switch is switched off, the phase shifter connected in parallel with the switch is in a working state, so that the signal at the input end of the current module is output from the output end after phase shift.
8. A phase control method of the phase shift device according to claims 1 to 7, comprising: respectively carrying out first processing and second processing on the input signal to obtain an output signal;
the first processing includes:
receiving an input signal, dividing the input signal into two paths of signals through a one-to-two power divider, and outputting the two paths of signals to a digital variable gain amplifier;
adjusting the amplitudes of the two paths of signals through a digital variable gain amplifier to obtain two paths of adjusted signals, and outputting the two paths of adjusted signals to a 3dB coupler;
coupling the two paths of adjusted signals through a 3dB coupler to obtain signals of any phase in one quadrant;
the second processing includes: the input signal is phase shifted.
9. The phase control method of claim 8, wherein the phase shifting the input signal comprises:
the working state of the phase shifter is controlled by controlling switches connected in parallel at two ends of the phase shifter, and an input signal is input into one or more phase shifters in the working state to shift the phase.
10. The phase control method according to claim 9, wherein the controlling the operating state of the phase shifter by controlling switches connected in parallel across the phase shifter comprises:
when the switch is closed, the phase shifter connected in parallel with the switch is in a short-circuit state, and the signal of the output end of the current module is the same as the signal of the input end;
when the switch is switched off, the phase shifter connected in parallel with the switch is in a working state, so that the signal at the input end of the current module is output from the output end after phase shift.
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