Satellite internet integrated plane millimeter wave oscillator based on glass-based material

Abstract

The invention discloses a satellite internet integrated plane millimeter wave oscillator based on a glass-based material, and belongs to the field of microwave circuit design. The oscillator comprises a DGS resonance module based on a glass substrate, two paths of same sub-oscillator modules, duplexer modules and a combiner module, wherein the two paths of sub-oscillator modules share the same DGS resonance module based on the glass substrate, and outputs of the two paths of sub-oscillator modules are respectively connected with the two duplexer modules; and the output with higher frequency is synthesized by the combiner module to form total output. The DGS resonance module adopts a glass-based process and has the advantages of miniaturization, low loss and low cost; the two sub-oscillators share one resonator module, strong coupling is achieved, and phase noise can be optimized; the duplexer module separates fundamental waves from second harmonics, so that good matching can be realized, and spurious suppression is improved. The LED lamp is easy to process, low in cost, good in heat dissipation performance and capable of effectively achieving miniaturization and integration.

Description

Technical Field

[0001] The invention belongs to the field of microwave circuit design and relates to a satellite Internet integrated planar millimeter wave oscillator based on glass-based materials. Background Art

[0002] The oscillator provides a stable frequency and clock signal for the satellite Internet system, ensuring the reliability and stability of communication. With the development of future communication technology, the requirements for system synchronization are becoming increasingly higher. As a key component for providing clock signals, the accuracy and stability of the oscillator will directly affect the synchronization performance and overall performance of the system.

[0003] In order to meet the requirements of modern microwave communication systems for signal transmission quality and capacity, it is crucial to design a signal source with high stability and low phase noise. The push-push oscillator is based on the principle of fundamental wave and odd harmonic cancellation and even harmonic superposition, which increases the output frequency by multiples. Since the output signal frequency is twice the operating frequency of the sub-oscillator, it realizes the functions of oscillator and frequency multiplier at the same time, effectively expanding the operating frequency range of active devices in microwave and millimeter wave oscillator circuits, reducing the noise generated by active devices, thereby reducing the overall phase noise of the oscillator and improving the overall performance of the oscillator.

[0004] The traditional push-push oscillator outputs the second harmonic through the combiner, but due to the fundamental wave reverse direction, the fundamental wave signal is cancelled after combining, resulting in the waste of the fundamental wave signal. Connecting a duplexer module after the sub-oscillator module to separate the fundamental wave and the second harmonic signal can effectively improve the spurious suppression and fundamental wave utilization.

[0005] DGS interferes with the waveguide characteristics of planar transmission lines by etching specific patterns on the ground plane, thereby increasing the effective inductance and capacitance. DGS breaks the traditional design method of microstrip and coplanar waveguide components and adds additional degrees of freedom in the design stage, which can effectively improve the overall performance of the circuit without adding any additional circuits.

[0006] At present, in the research in this direction at home and abroad, traditional substrates usually use silicon, gallium arsenide, ceramics and other materials. However, silicon-based materials have problems such as high loss and low quality factor, which will affect the insertion loss and phase noise of the oscillator. Ceramic materials have problems such as poor shrinkage, which will cause large errors in the processing accuracy of the oscillator and deteriorate performance.

[0007] Oscillators made based on glass substrates have the following advantages over oscillators made based on traditional materials such as silicon and ceramics: compared with silicon, glass has lower dielectric loss and higher quality factor; compared with ceramic, glass has smoother dimensional profile and good dimensional stability, can define smaller feature sizes, and has higher alignment accuracy; glass can be implemented in a simpler way, has lower processing costs and the potential for large-scale production.

[0008] Oscillators using glass-based technology can effectively achieve circuit integration, planarization, and miniaturization, and improve the overall performance of the circuit. As the requirements of communication systems for oscillators continue to increase, the use of glass-based technology to achieve low-noise, high-stability oscillators has broad application prospects. Summary of the invention

[0009] In view of this, the purpose of the present invention is to provide a satellite Internet integrated planar millimeter wave oscillator based on glass-based materials. The oscillator adopts glass-based technology and utilizes DGS structure to reduce the overall size of the device, promote the miniaturization and planarization of the oscillator, and make the oscillator have better high-frequency performance and isolation, thereby improving the overall performance.

[0010] In order to achieve the above object, the present invention provides the following technical solutions:

[0011] A satellite internet integrated planar millimeter wave oscillator based on glass-based materials is characterized in that the oscillator comprises two identical sub-oscillator modules, a glass-based DGS resonance module is connected in series between the two sub-oscillator modules, a fundamental wave and a second harmonic are separated at the output ends of the two sub-oscillator modules through a duplexer module, and the separated second harmonics are synthesized by a combiner module to become a total output.

[0012] The glass-based DGS resonant module adopts a quartz glass material to fill the substrate, has the advantages of low loss, low cost, high stability, high quality factor, etc., and is easy to process and integrate with other planar circuits.

[0013] Furthermore, the sub-oscillator modules share a glass-based DGS resonant module, which has strong coupling and can optimize the phase noise of the circuit.

[0014] Furthermore, the glass-based DGS resonant module adopts a substrate integrated waveguide structure, and forms an electrical boundary similar to a metal waveguide by drilling some metalized through holes on the dielectric substrate according to a certain rule, which is easy to integrate with a planar circuit, so that the circuit has a higher quality factor.

[0015] Furthermore, the defect pattern of the glass-based DGS resonant module is bilaterally symmetrical. By adjusting the resonant unit and its size, its resonant frequency can be changed to obtain the required operating frequency. Due to the characteristics of the resonant structure, the DGS can generate corresponding transmission zeros or poles around the resonant frequency. Adjusting the positions of these zeros and poles can further optimize the frequency selectivity and out-of-band suppression performance of the resonator.

[0016] Furthermore, the duplexer module is composed of a bandpass filter operating at the fundamental frequency and a bandpass filter operating at the second harmonic, which can achieve good matching at the fundamental and second harmonics, separate the fundamental and second harmonics, and improve the spurious suppression and harmonic suppression of the fundamental and second harmonic outputs.

[0017] The beneficial effects of the present invention are as follows: the present invention adopts a glass-based process, and the glass material has the advantages of low dielectric loss, low cost, high quality factor, high stability, etc., and can achieve better high-frequency performance and isolation performance; the DGS defect ground structure realizes the frequency selection filtering of the resonance module, and can effectively reduce the circuit size and realize circuit planarization; the duplexer module can effectively separate the fundamental wave and the second harmonic, and solve the problem of deterioration of harmonic suppression; the glass-based DGS resonance module circuit structure is simple and easy to process, and is easy to integrate with other microwave circuits, and has good practicality and application prospects.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 This is a circuit diagram of an integrated planar millimeter wave oscillator based on glass-based materials and applied to satellite internet according to the present invention;

[0021] Figure 2 This is a schematic diagram of the front structure of the glass-based DGS resonance module of the present invention;

[0022] Figure 3 This is a schematic diagram of the back structure of the glass-based DGS resonance module of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the DGS unit in the DGS resonance module of the present invention;

[0024] Reference numerals: a first sub-oscillator module 1 , a second sub-oscillator module 2 , a glass-based DGS resonance module 3 , a first duplexer module 4 , a second duplexer module 5 , and a combiner module 6 . DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] like Figure 1-4 As shown, the present invention provides a satellite internet integrated planar millimeter wave oscillator based on glass-based materials, including two identical first sub-oscillator modules 1 and second sub-oscillator modules 2, wherein a glass-based DGS resonance module 3 is connected in series between the first sub-oscillator module 1 and the second sub-oscillator module 2, and the two sub-oscillators share the same resonator; the output ends of the two sub-oscillator modules are respectively separated from the fundamental wave and the second harmonic by a first duplexer module 4 and a second duplexer module 5, and the separated second harmonics are synthesized by a combiner module 6 to become the total output.

[0029] The SIW structure of the glass-based DGS resonant module comprises 12 metallized through holes arranged side by side, the height of the through holes being the same as the thickness of the substrate, forming a structure similar to the metal wall of a rectangular waveguide, so that electromagnetic waves can propagate in a dielectric-filled region, forming an electromagnetic field distribution similar to that of a rectangular metal waveguide, the length of the glass-based DGS resonant module is ls, the width is wsiw, the length of the front substrate integrated waveguide is lsiw, the width is wsiw, the length of the front microstrip line is l, the width is w, the diameter of the metallized through hole is r, the distance between the centers of the through holes is rd, and the distance between the center of the through hole and the substrate is d.

[0030] The DGS unit of the glass-based DGS resonant module is composed of an I-type and a 90° bent C-type. The I-type has an upper width of W1, a length of L1, a side width of W2, a length of L2, a lower width of W3, and a length of L3; the C-type has a width of W4, an upper length of L4, and a side length of L5; the distance between the I-type and the C-type is d. By adjusting the interval between the I-type and the C-type and the size of the DGS unit, the coupling of the resonator unit and its resonant frequency can be changed to obtain the required working frequency band.

[0031] The first sub-oscillator module 1, the second sub-oscillator module 2, the glass-based DGS resonant module 3, the first duplexer module 4, the second duplexer module 5 and the combiner module 6 are all laid on a glass substrate. The glass substrate is made of quartz glass material with a dielectric constant of 3.8 and a loss tangent tgσ≤10 -3 , with a thickness of 0.4mm, which can better realize the performance of the oscillator.

[0032] The integrated planar millimeter wave oscillator for satellite internet of the present invention adopts a glass-based process and has the advantages of miniaturization, low loss and low cost, can improve the quality factor and heat dissipation performance of the circuit, is simple to process and easy to integrate, and can effectively improve the overall performance of the circuit.

[0033] By adjusting the size of the glass-based DGS resonant structure, changing the coupling degree and the resonant frequency, the DGS resonator is composed of a microstrip line structure, can be formed in one step during processing, and the circuit is planarized, effectively reducing the circuit size; when the working center frequency of the resonator is about 15 GHz, the output frequency of the push-push oscillator is about 30 GHz, and the initial values ​​of the internal parameters of the glass-based DGS resonant structure are determined by simulation to be ls=10 mm, wsiw=6 mm, lsiw=6 mm, l=2 mm, w=0.75 mm, r=0.5 mm, rd=1 mm, d=0.75 mm, W1=0.5 mm, L1=5 mm, W2=0.87 mm, L2=0.8 mm, W3=0.4 mm, L3=3.6 mm, W4=0.3 mm, L4=1.6 mm, and L5=4.6 mm.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A satellite internet integrated planar millimeter wave oscillator based on glass-based materials, characterized in that: The invention comprises two identical first sub-oscillator modules and a second sub-oscillator module, wherein the two sub-oscillator modules are connected in series with a glass-based DGS resonance module; the output ends of the two sub-oscillator modules are separated from the fundamental wave and the second harmonic by two duplexer modules; the separated second harmonics are synthesized by a combiner module to become the total output.

2. The satellite internet integrated planar millimeter wave oscillator based on glass-based materials according to claim 1, characterized in that: The glass-based DGS resonant module adopts a quartz glass material to fill the substrate, has the advantages of low loss, low cost, high stability, high quality factor, etc., and is easy to process and integrate with other planar circuits.

3. The satellite internet integrated planar millimeter wave oscillator based on glass-based materials according to claim 1, characterized in that: The defective ground structure of the glass-based DGS resonance module can be equivalent to a resonant circuit of an inductor and a capacitor, and is provided with a bending structure, which can effectively reduce the circuit size and suppress high-order harmonics.

4. The satellite internet integrated planar millimeter wave oscillator based on glass-based materials according to claim 1, characterized in that: The two-way sub-oscillator modules have the same structure and share a glass-based DGS resonance module, which has strong coupling and can optimize the phase noise of the circuit.

5. The satellite internet integrated planar millimeter wave oscillator based on glass-based materials according to claim 1, characterized in that: The duplexer module is composed of a bandpass filter operating at a fundamental frequency and a bandpass filter operating at a second harmonic frequency, and can achieve good matching at the fundamental and second harmonics, thereby improving spurious suppression and harmonic suppression of the fundamental and second harmonic outputs.

6. The satellite internet integrated planar millimeter wave oscillator based on glass-based materials according to claim 1, characterized in that: The glass-based DGS resonant module, sub-oscillator module, duplexer module and synthesizer module are all laid on a glass substrate. The glass substrate is made of quartz glass material with a dielectric constant of 3.8 and a loss tangent tgσ≤10 -3 , thickness is 0.4mm.

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