Infinitely adjustable range phase shifter, stable-phase transmission link and loop oscillator

Abstract

The invention discloses an infinitely adjustable range phase shifter, a stable-phase transmission link and a loop oscillator. The infinitely adjustable range phase shifter comprises a first coupler, a first gain control module, N gain control modules, a second coupler and a phase-control signal resolving unit, an input signal is connected with an IN port of the first coupler, and an OUT port of the first coupler is correspondingly connected with an IN port of the second coupler through the gain control module; a phase shift signal is connected with an S port of the phase-control signal resolving unit, and a C port of the phase-control signal resolving unit is correspondingly connected with a C port of the gain control module; an OUT port of the second coupler outputs a phase-shifted signal; the phase-control signal resolving unit realizes distribution of different weights to each path of signals by independently controlling the gain of each path. According to the invention, the problem that the phase adjustment range of the existing phase shifter technology is limited in scenes such as a long-delay signal transmission link and a long-delay oscillation loop can be solved.

Description

Technical Field

[0001] The invention belongs to the field of optoelectronics and microwaves, and in particular relates to an infinitely adjustable range phase shifter, a phase-stable transmission link, and a ring oscillator. Background Art

[0002] Phase control is crucial in the microwave and optical fields, and is widely used in key technologies such as phased array antennas, optical communications, long-delay link signal transmission, frequency synthesis, and oscillation loops. Its accuracy directly affects the stability and performance of the system. Current research and technology are mostly limited to phase adjustment within a 360° range, which can meet the needs of conventional signal control. However, in scenarios such as long-delay links or long-delay oscillation loops, signal transmission will accumulate more than 360° of phase changes. Existing technologies often require complex methods such as phase resetting to achieve continuity, which increases system complexity and introduces additional instability. However, in these practical applications, achieving continuous, large-range, and stable phase control is crucial to improving signal transmission integrity and loop stability. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide an infinitely adjustable range phase shifter, a phase-stable transmission link, and a ring oscillator, which can solve the problem of limited phase adjustment range of existing phase shifter technology in scenarios such as long-delay signal transmission links and long-delay oscillation loops.

[0004] Technical solution: An infinitely adjustable range phase shifter of the present invention comprises a first coupler, a first gain control module, N gain control modules, a second coupler and a phase-control signal solving unit;

[0005] The input signal is connected to the IN port of the first coupler, and the N OUT ports of the first coupler are correspondingly connected to the N IN ports of the second coupler through N gain control modules;

[0006] The phase-shifted signal is connected to the S port of the phase-control signal solving unit, and the N C ports of the phase-control signal solving unit are correspondingly connected to the C port of each gain control module in the N gain control modules; the OUT port of the second coupler outputs the phase-shifted signal;

[0007] The phase-control signal solving unit independently controls the gain of each channel and assigns different weights to each channel signal.

[0008] Furthermore, the input signal passes through the first coupler and is phase-shifted and divided into N paths. The N paths of input signals are aggregated into one path through the second coupler and then output.

[0009] Furthermore, the phase-shifted signal is demodulated by a phase-control signal solving unit, which calculates the gains required for the N channels according to the phases required for the phase shift and inputs them into the C ports of the corresponding gain control modules, thereby controlling the gain control modules of each channel.

[0010] Furthermore, the input signal is an optical signal or an electrical signal.

[0011] Based on the same inventive concept, a phase-stable transmission link of the present invention comprises a signal transmission link and the infinitely adjustable range phase shifter mentioned above, wherein the signal transmission link and the infinitely adjustable range phase shifter are connected in series.

[0012] Furthermore, by controlling the phase of the infinitely adjustable range phase shifter, anti-phase compensation is performed on the phase fluctuation introduced in the signal transmission link.

[0013] Furthermore, the range of the reverse phase compensation is infinite.

[0014] Based on the same inventive concept, a ring oscillator of the present invention comprises a signal delay unit, a gain control unit, the above-mentioned infinitely adjustable range phase shifter, a frequency selection unit and a coupling unit;

[0015] The signal delay unit, the gain control unit, the infinitely adjustable range phase shifter, the frequency selection unit and the coupling unit are connected end to end to form an oscillation loop.

[0016] Based on the same inventive concept, the A port of the coupling unit of the present invention is connected in sequence to a signal delay unit, a gain control unit, a phase shifter with an infinitely adjustable range, and a frequency selection unit, and the output end of the frequency selection unit is connected to the S port of the coupling unit.

[0017] Furthermore, the coupling unit has a B port for outputting an oscillation loop signal.

[0018] Beneficial effects: Compared with the prior art, the significant technical effects of the present invention are as follows:

[0019] Able to achieve unlimited phase adjustment range: Breaking through the limitation of 360° adjustment range of traditional phase shifters, it can continuously and seamlessly adjust phase changes in any large range to meet the phase stability control requirements of long-delay links and long-delay oscillation loops.

[0020] Improve system stability and reliability: By eliminating the phase reset and compensation process, signal jumps and system interference are reduced, ensuring the integrity of signal transmission and the frequency stability of the closed-loop system.

[0021] Simplify system design and adapt to multi-scenario applications: No complex reset mechanism and compensation algorithm are required, which greatly reduces the design difficulty and can be widely used in microwave, optical communication, precision measurement and other fields.

[0022] The tuning speed is fast. Compared with mechanical or temperature adjustment, this solution has a large tuning bandwidth and a quick response. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of an infinitely adjustable range phase shifter disclosed in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a phase-stable transmission link disclosed in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of a ring oscillator disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described in detail below in conjunction with specific implementation methods and the accompanying drawings of the specification.

[0027] Example 1

[0028] like Figure 1 As shown, the infinitely adjustable range phase shifter of the present invention comprises a first coupler 1, a first gain control module 2, N gain control modules, a second coupler 5 and a phase-control signal solving unit 6. The input signal is connected to the IN port of the first coupler 1, and the N OUT ports of the first coupler 1 are correspondingly connected to the N IN ports of the second coupler 5 through the N gain control modules; specifically, the input signal is connected to the IN port of the first coupler 1, the OUT1 port of the first coupler 1 is connected to the I port of the first gain control module 2, the OUT2 port of the first coupler 1 is connected to the I port of the second gain control module 3, and so on, the OUTN port of the first coupler 1 is connected to the I port of the Nth gain control module 4. The O port of the first gain control module 2 is connected to the IN1 port of the second coupler 5, the O port of the second gain control module 3 is connected to the IN2 port of the second coupler 5, and so on, the O port of the Nth gain control module 4 is connected to the INN port of the second coupler 5. The output of the OUT port of the second coupler 5 is the phase-shifted signal. In this embodiment, the input signal may be an optical signal or an electrical signal.

[0029] The phase-shifted signal is connected to the S port of the phase-control signal solving unit 6, and the N C ports of the phase-control signal solving unit 6 are correspondingly connected to the C port of each gain control module in the N gain control modules; specifically, the phase-shifted signal is connected to the S port of the phase-control signal solving unit 6, the C1 port of the phase-control signal solving unit 6 is connected to the C port of the first gain control module 2, the C2 port of the phase-control signal solving unit 6 is connected to the C port of the second gain control module 3, and the CN port of the phase-control signal solving unit 6 is connected to the C port of the Nth gain control module 4.

[0030] The input signal first passes through the first coupler 1, and the phase-shifted signal is divided into N paths, which pass through the first gain control module 2, the second gain control module 3, ..., the Nth gain control module 4 respectively; the phase-control signal solution unit 6 independently controls the gain of each path and assigns different weights to each signal. The N input signals are summarized into one path through the second coupler 5 and then output, where N≥3. For example, when N=3, the phase of each path can be: 0°, 120°, 240° respectively. When a phase shift value of any angle is required, it is only necessary to use the adjustable gain module to control the gain of each path, and then control the weight of each path, and combine them into an output of any phase through vector superposition. The adjustment process is continuously adjustable. When the phase exceeds the range of 360 degrees, it is only necessary to periodically adjust the weight of each path. The adjustment process is continuously adjustable, and there is no reset, phase jump and other operations, which can achieve an unlimited range of phase shifting function.

[0031] The phase-shifted signal is demodulated by the phase-control signal solving unit 6, which calculates the required gains of the N channels according to the phases required for the phase shift and inputs them into the C ports of the corresponding gain control modules, thereby controlling the gain control modules of each channel.

[0032] The present invention utilizes a coupler to divide the input signal into multiple output signals with different phases, and the gain of each phase signal can be controlled separately to obtain signals with adjustable weights for each signal. Signals with different weights and different phases are superimposed on the same output end through a coupler to achieve an output signal with adjustable phase. The phase shifting device has a simple structure, precise control, continuous tuning, and an infinite phase tuning range. It has important application value in the field of microwave and optical signal processing, and can meet the needs of a variety of scenarios with high requirements for precise phase control and tuning range.

[0033] The technical solution of the present invention can break through the limitations of the existing technology, not only meet the needs of multi-cycle phase adjustment, but also significantly simplify system design and improve reliability, which is of great significance to the stability assurance of signal processing and precision systems.

[0034] Example 2

[0035] like Figure 2 As shown, the phase-stable transmission link of the present invention includes a signal transmission link 101 and the infinitely adjustable range phase shifter 102 described in Example 1, and the signal transmission link 101 and the infinitely adjustable range phase shifter 102 are connected in series.

[0036] The phase fluctuation introduced in the signal transmission link 101 is reversely compensated by controlling the phase of the infinitely adjustable range phase shifter 102. In this embodiment, the range of reverse phase compensation is infinite.

[0037] The infinitely adjustable range phase shifter 102 is connected in series to the signal transmission link 101, which can offset the phase change caused by transmission and achieve phase shift compensation with an infinite phase range.

[0038] Example 3

[0039] like Figure 3 As shown, the ring oscillator of the present invention comprises a signal delay unit 201, a gain control unit 202, the infinitely adjustable range phase shifter 102 described in Example 1, a frequency selection unit 204 and a coupling unit 205. The signal delay unit 201, the gain control unit 202, the infinitely adjustable range phase shifter 102, the frequency selection unit 204 and the coupling unit 205 are connected end to end to form an oscillation loop, and the infinitely adjustable range phase shifter 102 can be used to offset the phase fluctuation of the loop, so as to realize an oscillator with a large temperature range, continuous tunability and stable oscillation.

[0040] The A port of the coupling unit 205 is connected in sequence to the signal delay unit 201, the gain control unit 202, the infinitely adjustable range phase shifter 102, and the frequency selection unit 204, and the output end of the frequency selection unit 204 is connected to the S port of the coupling unit 205. The coupling unit 205 has a B port for outputting an oscillation loop signal.

[0041] The signal delay unit 201 provides delay, the gain control unit 202 provides loop gain, the infinitely adjustable range phase shifter 102 provides phase compensation, the frequency selection unit 204 is used to select several oscillation modes that meet the oscillation requirements, and the coupling unit 205 is used to couple part of the oscillation power in the loop as the output of the oscillator. Through this topological structure, the generation of high-stability signals can be achieved.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An infinitely adjustable range phase shifter, characterized in that: It comprises a first coupler (1), a first gain control module (2), N gain control modules, a second coupler (5) and a phase-control signal solving unit (6); The input signal is connected to the IN port of the first coupler (1), and the N OUT ports of the first coupler (1) are correspondingly connected to the N IN ports of the second coupler (5) through N gain control modules; The phase-shifted signal is connected to the S port of the phase-control signal solving unit (6), and the N C ports of the phase-control signal solving unit (6) are correspondingly connected to the C port of each gain control module in the N gain control modules; the OUT port of the second coupler (5) outputs the phase-shifted signal; The phase-control signal solving unit (6) achieves different weights assigned to each signal path by independently controlling the gain of each path.

2. The infinitely adjustable range phase shifter according to claim 1, characterized in that: The input signal passes through the first coupler (1), is phase-shifted and divided into N paths, and then enters the corresponding gain control module. After exiting, the N paths of input signals are aggregated into one path through the second coupler (5) and then output.

3. The infinitely adjustable range phase shifter according to claim 1, characterized in that: The phase-shifted signal is demodulated by a phase-control signal solving unit (6), and the phase-control signal solving unit (6) calculates the gains required by the N channels respectively according to the phases required for the phase shifting and inputs the gains into the C ports of the corresponding gain control modules, thereby controlling the gain control modules of each channel.

4. The infinitely adjustable range phase shifter according to claim 1, characterized in that: The input signal is an optical signal or an electrical signal.

5. A phase-stable transmission link, characterized in that: The invention comprises a signal transmission link (101) and the infinitely adjustable range phase shifter (102) as claimed in claim 1, wherein the signal transmission link (101) and the infinitely adjustable range phase shifter (102) are connected in series.

6. The phase-stable transmission link according to claim 5, characterized in that: By controlling the phase of the infinitely adjustable range phase shifter (102), anti-phase compensation is performed on the phase fluctuation introduced in the signal transmission link (101).

7. The phase-stable transmission link according to claim 6, characterized in that: The range of the reverse phase compensation is infinite.

8. A ring oscillator, characterized in that: It comprises a signal delay unit (201), a gain control unit (202), the infinitely adjustable range phase shifter (102) as claimed in claim 1, a frequency selection unit (204) and a coupling unit (205); The signal delay unit (201), the gain control unit (202), the infinitely adjustable range phase shifter (102), the frequency selection unit (204) and the coupling unit (205) are connected end to end to form an oscillation loop.

9. The ring oscillator according to claim 8, characterized in that: The A port of the coupling unit (205) is connected in sequence to a signal delay unit (201), a gain control unit (202), an infinitely adjustable range phase shifter (102), and a frequency selection unit (204); the output end of the frequency selection unit (204) is connected to the S port of the coupling unit (205).

10. The ring oscillator according to claim 8, characterized in that: The coupling unit (205) has a B port for outputting an oscillation loop signal.

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