K-band adjustable microwave delay line assembly
By designing the K-band adjustable microwave delay line assembly, using multiple sets of delay line groups and fine adjustment chips, the problems of high cost and complex structure in the existing technology are solved, and high-precision delay in the K-band is achieved Controlled and low-cost engineering applications.
Patent Information
- Application Number
- CN202411520713.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-02-21
Smart Images
Figure CN119496487A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of signal transmission technology, and for example, to a K-band adjustable microwave delay line component. Background Art
[0002] A delay device is a device used to delay an electrical signal for a period of time. A device that achieves delay simply through a transmission line is called a delay line, to distinguish it from a delay device that generates delay through other mechanisms and structures. Delay devices are usually required to have a flat amplitude-frequency characteristic and a suitable delay characteristic within the passband, and to have good insertion loss and return loss characteristics. They are widely used in moving target display radars, electronic computers, communication systems, measuring instruments (such as oscilloscopes), altimeters, missile fuses, speed sensors and other systems and devices. Commonly used delay lines include acoustic delay lines and optical delay lines.
[0003] The surface acoustic wave delay line is composed of functional components such as a piezoelectric substrate, an input interdigital transducer (IDTA) and an output interdigital transducer (IDTB). The input and output interdigital transducers are integrated on the piezoelectric substrate. The surface acoustic wave delay line is based on the piezoelectric effect and the inverse piezoelectric effect. Through the secondary signal conversion of electricity to sound and sound to electricity, the propagation time delay of the input radio frequency electrical signal is achieved. However, the delay amount that can be achieved by the acoustic wave delay line is relatively large, which can reach the microsecond level. The amplitude-frequency characteristic is a bandpass type, but its bandwidth is usually narrow, and the operating frequency is generally less than 3GHz.
[0004] Fiber delay refers to the time delay caused by the transmission of an optical signal in an optical fiber of a certain length. In a broad sense, it refers to any optical fiber or passive optical fiber network that transmits optical signals with a time delay function. In a narrow sense, a fiber delay line mainly refers to an optical fiber combination device with a signal delay function including a light source, a modulator, a transmission optical fiber, and a photodetector. Optical delay has the advantages of large delay (tens to hundreds of microseconds), broadband, and low loss. It also has the characteristics of anti-interference, light weight, and small size, which is particularly important in some occasions. However, for electronic systems, the application of optical delay lines requires photoelectric conversion, which significantly increases the complexity of the system.
[0005] Obviously, optical fiber and surface acoustic wave delay devices are usually expensive and complex in structure. Although they can meet the needs of large delay, they are not economical and the processing process is complicated, which is not conducive to engineering applications.
[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention
[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.
[0008] An embodiment of the present disclosure provides a K-band adjustable microwave delay line component, comprising a first amplifier, a step delay group, a second amplifier, a small step delay chip and a phase-stable step attenuator connected in sequence, the step delay group comprising a plurality of delay line groups, the plurality of delay line groups being connected in series, each of the delay line groups comprising a delay line circuit, a through circuit and two single-pole double-throw switches, the single-pole double-throw switch being used to switch the circuit to be connected to the through circuit or to the delay line circuit.
[0009] In one embodiment, the plurality of delay line groups include eight groups, and the delays of the delay line circuits corresponding to the eight delay line groups are 0.1m, 0.2m, 0.4m, 0.8m, 1.6m, 3.2m, 6.4m and 10.4m respectively.
[0010] In one embodiment, in the delay line groups corresponding to delays of 0.1 m, 0.2 m and 0.4 m, the through circuit is provided with a first attenuator.
[0011] In one embodiment, in the delay line groups corresponding to delays of 0.8m, 1.6m, 3.2m, 6.4m and 10.4m, the delay line circuit is serially connected with a third amplifier and a second attenuator.
[0012] In one embodiment, the 3.2m, 6.4m and 10.4m delay lines are all composed of 0.8m and 1.6m delay lines.
[0013] The K-band adjustable microwave delay line component provided by the embodiments of the present disclosure can achieve the following technical effects:
[0014] It can achieve the required delay in the frequency band of 24.25GHz to 24.75GHz, and finely adjust the delay through a small step delay chip. Combined with a phase-stable step attenuator, the performance of the microwave link, such as loss and gain, is dynamically adjusted to ensure high accuracy and stability of the signal output, ensure that the accuracy of the delay meets the application requirements, and achieve high-precision control of the step delay. The above structure is based on a microwave delay line, with a simple structure and low cost, so it can be economical on the basis of meeting the needs and is suitable for large-scale engineering applications.
[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is an overall schematic diagram of the K-band adjustable microwave delay line component structure provided in an embodiment of the present application.
[0017] Figure 2 A schematic diagram of the overall structure of the delay line group provided in an embodiment of the present application.
[0018] Figure 3 A schematic diagram of the principle block diagram of a typical 1-bit microwave delay line group provided in an embodiment of the present application.
[0019] Figure 4 Schematic diagram of the topological structure of the 0.1m, 0.2m and 0.4m microwave delay line groups provided in the embodiments of the present application.
[0020] Figure 5 Schematic diagram of the topological structure of the 0.8m and 1.6m microwave delay line groups provided in the embodiments of the present application.
[0021] Figure 6 Schematic diagram of the topological structure of the 3.2m, 6.4m and 10.4m microwave delay line groups provided in the embodiments of the present application.
[0022] Figure 7 This is a simulation diagram of a 0.8m fixed delay line provided in an embodiment of the present application.
[0023] Figure 8 This is a simulation diagram of a 1.6m fixed delay line provided in an embodiment of the present application.
[0024] Fig. 9 This is a performance parameter diagram of the attenuator provided in an embodiment of the present application.
[0025] Fig.10 A performance parameter diagram of the amplifier provided in an embodiment of the present application.
[0026] Fig.11 Another performance parameter diagram of the amplifier provided in an embodiment of the present application.
[0027] Fig.12 Another performance parameter diagram of the amplifier provided in an embodiment of the present application.
[0028] Fig.13 A performance parameter diagram of a switch provided in an embodiment of the present application.
[0029] Fig.14 Another performance parameter diagram of the switch provided in an embodiment of the present application.
[0030] Fig.15 A gain and power distribution diagram of each delay line module in the microwave delay assembly provided in an embodiment of the present application. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-15 This application is described in further detail.
[0032] An embodiment of the present disclosure provides a K-band adjustable microwave delay line component, comprising a first amplifier, a step delay group, a second amplifier, a small step delay chip and a phase-stable step attenuator connected in sequence, the step delay group comprising a plurality of delay line groups, the plurality of delay line groups being connected in series, each delay line group comprising a delay line circuit, a through circuit and two single-pole double-throw switches, the single-pole double-throw switch being used to switch the circuit to be connected to the through circuit or to the delay line circuit.
[0033] The above structure can achieve the required delay in the frequency band of 24.25GHz to 24.75GHz, and finely adjust the delay through a small step delay chip. Combined with a phase-stable step attenuator, the performance of the microwave link, such as loss and gain, is dynamically adjusted to ensure high accuracy and stability of the signal output, ensure that the accuracy of the delay meets the application requirements, and achieve high-precision control of the step delay. The above structure is based on a microwave delay line, with a simple structure and low cost, so it can be economical on the basis of meeting the needs and is suitable for large-scale engineering applications.
[0034] In one embodiment, the multiple delay line groups include eight groups, and the delays of the delay line circuits corresponding to the eight delay line groups are 0.1m, 0.2m, 0.4m, 0.8m, 1.6m, 3.2m, 6.4m and 10.4m respectively. Among them, the delay corresponding to the 0.1m fixed delay line is about 0.3333ns; the delay corresponding to the 0.2m fixed delay line is about 0.6666ns; the delay corresponding to the 0.4m fixed delay line is about 1.3333ns; the delay corresponding to the 0.8m fixed delay line is about 2.6667ns; the delay corresponding to the 1.6m fixed delay line is about 5.3333ns; the delay corresponding to the 3.2m fixed delay line is about 10.6667ns; the delay corresponding to the 6.4m fixed delay line is about 21.3333ns; and the delay corresponding to the 10.4m fixed delay line is about 34.6667ns. The above 8 groups of delay lines can achieve a dynamic delay range of 0 to 23m, that is, 0 to 76.667ns.
[0035] In one embodiment, in the delay line group corresponding to delays of 0.1m, 0.2m and 0.4m, the through circuit is provided with a first attenuator, so as to dynamically adjust the gain and loss in the microwave link to ensure the consistency and stability of signal transmission, and at the same time have a gain matching adjustment function to improve signal quality.
[0036] In one embodiment, in the delay line groups corresponding to delays of 0.8m, 1.6m, 3.2m, 6.4m and 10.4m, the delay line circuit is connected in series with a third amplifier and a second attenuator, so as to dynamically adjust the gain and loss in the microwave link to ensure the consistency and stability of signal transmission, and at the same time have a gain matching adjustment function to improve signal quality.
[0037] In one embodiment, the first amplifier, the second amplifier, and the third amplifier may use amplifiers of the same specification.
[0038] In one embodiment, the 3.2m, 6.4m and 10.4m delay lines are constructed from the 0.8m and 1.6m delay lines.
[0039] In this embodiment, in order to meet the requirements of engineering applications, multiple fixed delay lines of the same specifications (0.1m, 0.2m, 0.4m, 0.8m and 1.6m) are used in the design, so that the entire component is easy to install, debug and maintain, and the expansibility of the system and the convenience of engineering applications are enhanced. To ensure the consistency of the delay line, fixed delay lines of various specifications are embedded in the board as standard modules. Through the standard modules of fixed delay lines of unified specifications, the design and manufacturing process of the component is simplified, the consistency and maintainability are improved, and it is suitable for large-scale engineering applications at a low cost.
[0040] like Figures 1 to 15 As shown, according to the design ideas and the basic parameters of each device, the gain and power distribution of each delay line module are sorted out. The final performance of this design can achieve: in the frequency band of 24.25GHz to 24.75GHz, a dynamic delay range of 0 to 23m (i.e. 0 to 76.667ns) is achieved, and each step progress of the delay component can reach 0.1m (0.333ns). Combined with the synergy of digitally controlled attenuators, amplifiers and switches, the gain change under different delays can meet the module gain change of less than 3dB, and each delay unit meets the flatness of less than 0.5dB. The final combined flatness is less than 2dB.
[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A K-band adjustable microwave delay line component, comprising a first amplifier, a step delay group, a second amplifier, a small step delay chip and a phase-stable step attenuator connected in sequence, wherein the step delay group comprises a plurality of delay line groups, wherein the plurality of delay line groups are connected in series, wherein each delay line group comprises a delay line circuit, a through circuit and two single-pole double-throw switches, wherein the single-pole double-throw switch is used to switch the circuit to be connected to the through circuit or to the delay line circuit.
2. The K-band tunable microwave delay line assembly according to claim 1, characterized in that: The multiple delay line groups include eight groups, and the delays of the delay line circuits corresponding to the eight delay line groups are 0.1m, 0.2m, 0.4m, 0.8m, 1.6m, 3.2m, 6.4m and 10.4m respectively.
3. The K-band tunable microwave delay line assembly according to claim 2, characterized in that: include: In the delay line group corresponding to the delays of 0.1m and 0.4m, the through circuit is provided with a first attenuator.
4. The K-band tunable microwave delay line assembly according to claim 2, characterized in that: include: In the delay line groups corresponding to delays of 0.8m, 1.6m, 3.2m, 6.4m and 10.4m, the delay line circuit is serially connected with a third amplifier and a second attenuator.
5. The K-band tunable microwave delay line assembly according to claim 2, characterized in that: include: The 3.2m, 6.4m and 10.4m delay lines are all composed of 0.8m and 1.6m delay lines.