A phase adjustment circuit for multi-channels

Abstract

The utility model discloses a phase adjustment circuit applied to multiple channels, belonging to the technical field of multi-channel radio frequency circuits, which includes a power supply circuit, a control circuit and a radio frequency circuit; the power supply circuit is respectively connected to the radio frequency circuit and the control circuit; the control circuit is connected to the radio frequency circuit, and the control circuit controls the radio frequency circuit through a signal; the phase adjustment circuit is arranged in different channels, and the input end of the phase adjustment circuit is connected to the output end of the bandpass filter, and the output end of the phase adjustment circuit is connected to the input end of the amplifier. The phase unit of the utility model is used to negatively and positively adjust the phase of the input radio frequency signal; the radio frequency switch is used to control the connection or disconnection of each phase unit, so as to realize the corresponding phase adjustment of the input radio frequency signal, which can effectively solve the application problems such as insufficient phase consistency of multiple radio frequency channels.

Description

Technical Field

[0001] The utility model belongs to the technical field of multi-channel radio frequency circuits, and in particular relates to a phase adjustment circuit applied to multiple channels. Background Art

[0002] Multi-channel phase consistency technology means that when signals with the same phase are simultaneously input into multiple receiving links or transmitting links, the signal phase at the output end needs to be kept within a certain error range. It is an important factor that must be considered when designing multi-channel links.

[0003] Multi-channel phase consistency technology has a wide range of applications in wireless communications, radar, electronic warfare and other fields. It plays a vital role in improving system performance, ensuring signal quality and enhancing system reliability.

[0004] In the prior art, multi-channel RF circuits have a problem of large phase differences between channels due to PCB processing errors and device assembly consistency errors. Utility Model Content

[0005] The purpose of the utility model is to provide a phase adjustment circuit applied to multiple channels in view of the above-mentioned deficiencies in the prior art, so as to solve the problem of large phase differences between channels in the multi-channel RF circuit in the prior art caused by PCB processing errors and device assembly consistency errors.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A phase adjustment circuit applied to multiple channels, comprising a power supply circuit, a control circuit and a radio frequency circuit;

[0008] The power circuit is connected to the radio frequency circuit and the control circuit respectively; the control circuit is connected to the radio frequency circuit, and the control circuit controls the radio frequency circuit through signals.

[0009] Furthermore, the phase adjustment circuit is arranged in different channels, and the input end of the phase adjustment circuit is connected to the output end of the bandpass filter, and the output end of the phase adjustment circuit is connected to the input end of the amplifier.

[0010] Furthermore, the radio frequency circuit includes a plurality of radio frequency switches and a plurality of phase units; the radio frequency switches are connected to the phase units, and different phase units are selected by controlling the radio frequency switches to switch.

[0011] Further, the radio frequency switch includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch and a twelfth switch;

[0012] The input end of the first switch is connected to the output end of the bandpass filter, one output end of the first switch is connected to the input end of the -5° phase unit, the output end of the -5° phase unit and the other output end of the first switch are respectively connected to the two input ends of the second switch, and the output end of the second switch is connected to the input end of the third switch;

[0013] One output end of the third switch is connected to the input end of the -10° phase unit, the output end of the -10° phase unit and the other output end of the third switch are respectively connected to two input ends of the fourth switch, and the output end of the fourth switch is connected to the input end of the fifth switch;

[0014] One output end of the fifth switch is connected to the input end of the -20° phase unit, the output end of the -20° phase unit and the other output end of the fifth switch are respectively connected to two input ends of the sixth switch, and the output end of the sixth switch is connected to the input end of the seventh switch;

[0015] One output end of the seventh switch is connected to the input end of the -5° phase unit, the output end of the -5° phase unit and the other output end of the seventh switch are respectively connected to the two input ends of the eighth switch, and the output end of the eighth switch is connected to the input end of the ninth switch;

[0016] An output end of the ninth switch is connected to the input end of the -10° phase unit, the output end of the -10° phase unit and the other output end of the ninth switch are respectively connected to two input ends of the tenth switch, and the output end of the tenth switch is connected to the input end of the eleventh switch;

[0017] An output end of the eleventh switch is connected to the input end of the -20° phase unit, the output end of the -20° phase unit and the other output end of the eleventh switch are respectively connected to two input ends of the twelfth switch, and the output end of the twelfth switch is connected to the input end of the amplifier.

[0018] Furthermore, the power supply circuit includes a voltage stabilizer, and the voltage stabilizer supplies power to the control circuit and the radio frequency circuit respectively.

[0019] Furthermore, the control circuit includes a displacement buffer; the displacement buffer is connected to the radio frequency switch and converts the serial input control signal into six parallel signal outputs to control the switching of the radio frequency switch.

[0020] Furthermore, the phase unit is a microstrip line.

[0021] Further, the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the eleventh switch and the twelfth switch are all single-pole double-throw switches.

[0022] The phase adjustment circuit applied to multiple channels provided by the utility model has the following beneficial effects:

[0023] The phase unit of the utility model is used to negatively and positively adjust the phase of the input radio frequency signal; the radio frequency switch is used to control the connection or disconnection of each phase unit, so as to achieve corresponding phase adjustment of the input radio frequency signal, which can effectively solve application problems such as insufficient phase consistency of multiple radio frequency channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a principle block diagram of a phase adjustment circuit applied to multiple channels.

[0025] Figure 2 The utility model is a circuit principle block diagram of the phase adjustment circuit applied to multiple channels. DETAILED DESCRIPTION

[0026] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0027] Example 1

[0028] This embodiment provides a phase adjustment circuit for multi-channels, which is used to solve the problem of large phase difference between channels in multi-channel RF circuits due to PCB processing errors and device assembly consistency errors in the prior art. Figure 1 , which specifically include:

[0029] Power circuit, control circuit and radio frequency circuit;

[0030] The power circuit is connected to the radio frequency circuit and the control circuit respectively; the control circuit is connected to the radio frequency circuit, and the control circuit controls the radio frequency circuit through signals.

[0031] Specifically, as a preferred embodiment of the present embodiment, the power supply circuit mainly includes a voltage regulator, preferably an LT1764 voltage regulator, which is used to provide the required power supply voltage to the control circuit and the radio frequency circuit.

[0032] The control circuit includes a serial input to parallel output displacement buffer, preferably a 74HC595 displacement buffer, which converts the serial input control signal into six parallel signal outputs, which are then respectively connected to the RF switches in the RF circuit to achieve switching of the RF switches.

[0033] The RF circuit includes a plurality of RF switches and a plurality of phase units; the phase units correspond to Figure 1 The -5° phase unit, -10° phase unit, and -20° phase unit.

[0034] The radio frequency switch is used to switch and select different phase units.

[0035] The phase unit uses the effect of the length of the microstrip line on the phase. Different phase units are microstrip lines of different lengths. When the RF switch is switched to the corresponding phase unit, the phase unit implements the corresponding phase adjustment for the input RF signal.

[0036] As a preferred embodiment of this embodiment, the radio frequency switch includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch and a twelfth switch;

[0037] The input end of the first switch is connected to the output end of the bandpass filter, one output end of the first switch is connected to the input end of the -5° phase unit, the output end of the -5° phase unit and the other output end of the first switch are respectively connected to the two input ends of the second switch, and the output end of the second switch is connected to the input end of the third switch;

[0038] One output end of the third switch is connected to the input end of the -10° phase unit, the output end of the -10° phase unit and the other output end of the third switch are respectively connected to two input ends of the fourth switch, and the output end of the fourth switch is connected to the input end of the fifth switch;

[0039] One output end of the fifth switch is connected to the input end of the -20° phase unit, the output end of the -20° phase unit and the other output end of the fifth switch are respectively connected to two input ends of the sixth switch, and the output end of the sixth switch is connected to the input end of the seventh switch;

[0040] One output end of the seventh switch is connected to the input end of the -5° phase unit, the output end of the -5° phase unit and the other output end of the seventh switch are respectively connected to the two input ends of the eighth switch, and the output end of the eighth switch is connected to the input end of the ninth switch;

[0041] An output end of the ninth switch is connected to the input end of the -10° phase unit, the output end of the -10° phase unit and the other output end of the ninth switch are respectively connected to two input ends of the tenth switch, and the output end of the tenth switch is connected to the input end of the eleventh switch;

[0042] An output end of the eleventh switch is connected to the input end of the -20° phase unit, the output end of the -20° phase unit and the other output end of the eleventh switch are respectively connected to two input ends of the twelfth switch, and the output end of the twelfth switch is connected to the input end of the amplifier.

[0043] The first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the eleventh switch and the twelfth switch of this embodiment correspond to Figure 1 Switch 1, switch 2, switch 3, switch 4, switch 5, switch 6, switch 7, switch 8, switch 9, switch 10, switch 11, and switch 12.

[0044] As a preference of this embodiment, the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the eleventh switch and the twelfth switch are all single-pole double-throw switches.

[0045] Among them, the first switch, the third switch, the fifth switch, the seventh switch, the ninth switch, and the eleventh switch are Yaguang VD7515 single-pole double-throw switches; the second switch, the fourth switch, the sixth switch, the eighth switch, the tenth switch, and the twelfth switch are all Yaguang VD7516 single-pole double-throw switches.

[0046] When performing RF signal phase modulation operations:

[0047] The external serial control signal in the control circuit is converted into a six-bit parallel control signal by 74HC595. The first control signal simultaneously controls the switching of the first switch and the second switch, ..., and the sixth control signal simultaneously controls the switching of the eleventh switch and the twelfth switch.

[0048] For example, when the first control signal is at a high level, the RFC port of the first switch is connected to the RF2 port, and the RF1 port of the second switch is connected to the RFC port. When the first control signal is at a low level, the RFC port of the first switch is connected to the RF1 port, and the RF2 port of the second switch is connected to the RFC port. The third switch, the fourth switch combination, ..., the eleventh switch, the twelfth switch combination are similar, that is, in order, two adjacent switches are used as a subunit, and one control signal controls one subunit.

[0049] In the initial state, the first switch to the sixth switch are switched to the through end, and the seventh switch to the twelfth switch are switched to the phase unit.

[0050] When the third to sixth switches are switched to the through-end and the seventh to twelfth switches are switched to the phase unit, the first and second switches are switched from the through-end to the -5° phase unit, which realizes a -5° phase shift for the RF signal. ……. When the first to sixth switches are switched to the through-end and the ninth to twelfth switches are switched to the phase unit, the seventh and eighth switches are switched from the -5° phase unit to the through-end, which realizes a +5° phase shift for the RF signal. ……. It is also possible to switch the six-position switch in combination, and finally realize a phase shift range of -35° to +35° for the input RF signal.

[0051] Example 2

[0052] This embodiment applies the phase adjustment circuit to a multi-channel RF circuit and cooperates with other RF devices to build a phase test and analysis system for RF signals. The RF signal test and analysis system includes existing technologies such as a DC power supply and a vector network signal analyzer. Figure 2 , which specifically includes the following:

[0053] The phase adjustment circuit is arranged in different channels, and the input end of the phase adjustment circuit is connected to the bandpass filter, and the output end of the phase adjustment circuit is connected to the input end of the amplifier.

[0054] First, switch all the RF switches in the phase adjustment circuit to the initial state, use a vector network analyzer to measure the phase of each channel 1 to channel 4, and select the channel with the middle phase value as the reference channel.

[0055] If the phase value of a channel is smaller than that of the reference channel, the phase adjustment circuit is set to an appropriate positive phase adjustment value through digital control according to the phase value difference value. This makes the difference between the channel phase and the reference channel phase as small as possible. If the phase value of a channel is larger than that of the reference channel, the phase adjustment circuit is set to an appropriate negative phase adjustment value through digital control according to the phase value difference value. This makes the difference between the channel phase and the reference channel phase as small as possible. This ultimately achieves multi-channel phase consistency.

[0056] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A phase adjustment circuit for multi-channels, characterized in that: Including power circuit, control circuit and radio frequency circuit; The power supply circuit is connected to the radio frequency circuit and the control circuit respectively; the control circuit is connected to the radio frequency circuit, and the control circuit controls the radio frequency circuit through signals; The phase adjustment circuit is arranged in different channels, and the input end of the phase adjustment circuit is connected to the output end of the bandpass filter, and the output end of the phase adjustment circuit is connected to the input end of the amplifier; The radio frequency circuit includes a plurality of radio frequency switches and a plurality of phase units; the radio frequency switches are connected to the phase units, and different phase units are selected by controlling the radio frequency switches to switch; The control circuit includes a displacement buffer; the displacement buffer is connected to the radio frequency switch and converts a serial input control signal into six parallel signal outputs to control the switching of the radio frequency switch.

2. The phase adjustment circuit for multi-channels according to claim 1, characterized in that: The radio frequency switch includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch and a twelfth switch; The input end of the first switch is connected to the output end of the bandpass filter, one output end of the first switch is connected to the input end of the -5° phase unit, the output end of the -5° phase unit and the other output end of the first switch are respectively connected to the two input ends of the second switch, and the output end of the second switch is connected to the input end of the third switch; One output end of the third switch is connected to the input end of the -10° phase unit, the output end of the -10° phase unit and the other output end of the third switch are respectively connected to two input ends of the fourth switch, and the output end of the fourth switch is connected to the input end of the fifth switch; One output end of the fifth switch is connected to the input end of the -20° phase unit, the output end of the -20° phase unit and the other output end of the fifth switch are respectively connected to two input ends of the sixth switch, and the output end of the sixth switch is connected to the input end of the seventh switch; One output end of the seventh switch is connected to the input end of the -5° phase unit, the output end of the -5° phase unit and the other output end of the seventh switch are respectively connected to two input ends of the eighth switch, and the output end of the eighth switch is connected to the input end of the ninth switch; One output end of the ninth switch is connected to the input end of the -10° phase unit, the output end of the -10° phase unit and the other output end of the ninth switch are respectively connected to two input ends of the tenth switch, and the output end of the tenth switch is connected to the input end of the eleventh switch; One output end of the eleventh switch is connected to the input end of the -20° phase unit, the output end of the -20° phase unit and the other output end of the eleventh switch are respectively connected to two input ends of the twelfth switch, and the output end of the twelfth switch is connected to the input end of the amplifier.

3. The phase adjustment circuit applied to multiple channels according to claim 1, characterized in that: The power supply circuit includes a voltage stabilizer, and the voltage stabilizer supplies power to the control circuit and the radio frequency circuit respectively.

4. The phase adjustment circuit applied to multiple channels according to claim 1, characterized in that: The phase unit is a microstrip line.

5. The phase adjustment circuit applied to multiple channels according to claim 2, characterized in that: The first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the eleventh switch and the twelfth switch are all single-pole double-throw switches.

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