Multi-frequency microstrip resonator and microwave circuit device

Abstract

The utility model discloses a multi-frequency microstrip resonator and a microwave circuit device, the multi-frequency microstrip resonator comprises a signal line, an insulating medium and a metal ground which are distributed from top to bottom, the signal line comprises at least three microstrip lines which are nested from inside to outside, and an annular coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the microstrip line at the center is linear or annular, the microstrip lines at other positions are annular, and the annular shape is an open ring or a closed ring. In the multi-frequency micro-strip resonator provided by the utility model, two adjacent layers of micro-strip lines are coupled through the annular coupling gap formed during the period to generate a coupling effect of a plurality of resonance modes, so that the whole device has a relatively wide band-pass characteristic; by adjusting geometric parameters such as width and gap size of each microstrip line, resonance characteristics of different frequency bands can be flexibly controlled, resonance frequency and bandwidth characteristics can be flexibly adjusted, and multi-frequency-band work is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of microstrip resonators, in particular to a multi-frequency microstrip resonator and a microwave circuit device. Background Art

[0002] The resonator is a basic microwave device, which is widely used in microwave circuit devices such as filters and antennas. Microstrip resonators are widely used due to their small size, easy processing and integration.

[0003] However, general microstrip resonators have only one resonant frequency and cannot realize multi-band filters and multi-band antennas; if multi-band is to be realized, multiple resonators must be used, which will inevitably increase the size of microwave circuit devices. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a multi-frequency microstrip resonator and a microwave circuit device which can realize multiple resonant frequencies in one microstrip circuit and have a small and compact volume.

[0005] In order to achieve the above object, according to the first aspect of the utility model, two multi-frequency microstrip resonators are provided, and the technical solutions are as follows:

[0006] The first multi-frequency microstrip resonator includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes at least three microstrip lines nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the shape of the microstrip line at the center is a straight line or a ring, and the shape of the microstrip lines at other positions is a ring, and the ring is an open ring or a closed ring.

[0007] In the above-mentioned multi-frequency microstrip resonator of the utility model, two adjacent layers of microstrip lines are coupled through the annular coupling gap formed therebetween, generating a coupling effect of multiple resonance modes, so that the overall device has a wider bandpass characteristic; the shape of the microstrip line at the center (straight line or ring) determines the resonance frequency of the lowest frequency band; the ring structure of the outermost microstrip line determines the frequency of the high-frequency resonance mode; by adjusting the geometric parameters of each microstrip line such as width, gap size and other parameters, the resonance characteristics of different frequency bands can be flexibly controlled, the resonance frequency and bandwidth characteristics can be flexibly adjusted, and multi-band operation can be achieved.

[0008] Therefore, the utility model utilizes the coupling between multiple layers of microstrip lines to achieve compact, multi-band resonant performance, and has the advantages of small size, simple structure, and low manufacturing cost. It can be used for filtering, resonance, coupling and other applications in microwave and millimeter wave frequency bands, and can meet the needs of frequency reuse, bandwidth expansion, etc., and has broad application prospects in 5G, the Internet of Things and other fields.

[0009] As a further improvement of the above-mentioned multi-frequency microstrip resonator: one end of the open ring is short-circuited and the other end is open-circuited. Thus, the short-circuit-open-circuit structure can effectively change the resonance characteristics of the open ring and increase the flexibility of the resonance frequency band, wherein the short-circuit end will form an electromagnetic field loop to generate a specific resonance mode, and the open-circuit end will generate electromagnetic field reflection and couple with the resonance mode of the short-circuit end; by adjusting the position of the short-circuit end and the open-circuit end and other parameters of the microstrip line, the performance of each resonance frequency band can be finely adjusted to improve the functional integration of the device.

[0010] As a further improvement of the above-mentioned multi-frequency microstrip resonator: the ring is polygonal, circular or elliptical. Therefore, the ring microstrip lines of different shapes will produce different composite resonance modes under the coupling effect with the central microstrip line, which is conducive to optimizing the performance indicators of the device, such as bandwidth, isolation, etc.; among them, the polygonal ring can finely control the resonance frequency and bandwidth by adjusting the number of sides; the circular ring has a more symmetrical electromagnetic field distribution, which is conducive to the optimization of the resonance characteristics; the elliptical ring can introduce additional degrees of freedom for adjusting the frequency interval and bandwidth of the resonance frequency band.

[0011] As a further improvement of the above-mentioned multi-frequency microstrip resonator: the ring is a rectangular ring. Therefore, compared with other shapes of rings, the rectangular structure is conducive to the miniaturization and mass production of devices in the integrated circuit manufacturing process, and by adjusting the ratio of the long side to the short side and the local electromagnetic field distribution difference generated at the four corners, the resonant frequency can be finely adjusted to generate a more complex resonant mode, which is conducive to achieving a wider bandpass characteristic.

[0012] As a further improvement of the above multi-frequency microstrip resonator: the opening position of the split ring is set in the middle of any side. Therefore, the middle opening will produce additional electromagnetic field reflection and coupling effects. Compared with the end openings, the middle opening can bring more uniform electromagnetic field distribution, which is conducive to improving the stability of the resonance characteristics.

[0013] As a further improvement of the above multi-frequency microstrip resonator: when the microstrip line at the center is straight, both ends are open circuit. Thus, on the one hand, the reflection effect of the electromagnetic field can be generated to form a specific boundary condition, and on the other hand, the electromagnetic field distribution on the central microstrip line can be changed, thereby affecting the resonance characteristics of the lowest frequency band; by adjusting the length of the microstrip line at the center, the resonance frequency and bandwidth of the lowest frequency band can be finely controlled.

[0014] As a further improvement of the above multi-frequency microstrip resonator: when two adjacent microstrip lines are open loops, the opening directions are different. Therefore, by cleverly adjusting the directions of the openings of adjacent microstrip lines, the coupling strength of different frequency bands can be further optimized to obtain ideal bandwidth and isolation.

[0015] The second multi-frequency microstrip resonator includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line, a second microstrip line and a third microstrip line nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line is a straight line and both ends are open; the second microstrip line is a closed loop; and the third microstrip line is an open loop, one end of which is short-circuited and the other end is open.

[0016] The above-mentioned multi-frequency microstrip resonator in the utility model integrates multiple optimization design points, including microstrip line shape, boundary conditions, open ring structure, etc., has strong structural design flexibility, and can achieve fine control of the resonance characteristics, thereby meeting the performance requirements of multi-band and wideband.

[0017] In order to achieve the above object, according to the second aspect of the utility model, a microwave circuit device is provided, and the technical solution is as follows:

[0018] A microwave circuit device comprises any one of the multi-frequency microstrip resonators described in the first aspect above.

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present invention are used to assist the understanding of the present invention. The contents provided in the drawings and their related descriptions in the present invention can be used to explain the present invention, but do not constitute an improper limitation on the present invention.

[0021] In the attached picture:

[0022] Figure 1 This is a front view of the multi-frequency microstrip resonator of Example 1 of the utility model.

[0023] Figure 2 This is a front view of the multi-frequency microstrip resonator of Example 2 of the utility model.

[0024] Figure 3 This is a front view of the multi-frequency microstrip resonator of Example 3 of the utility model.

[0025] Figure 4 This is a front view of the multi-frequency microstrip resonator of Example 4 of the utility model.

[0026] Figure 5 This is a front view of the multi-frequency microstrip resonator of Example 5 of the utility model.

[0027] Figure 6This is a front view of the multi-frequency microstrip resonator of Example 6 of the utility model.

[0028] Figure 7 This is a front view of the multi-frequency microstrip resonator of Example 7 of the utility model.

[0029] Figure 8 This is a front view of the multi-frequency microstrip resonator of Example 8 of the utility model.

[0030] Fig. 9 This is a front view of the multi-frequency microstrip resonator of Example 9 of the utility model.

[0031] Fig.10 It is a front view of the multi-frequency microstrip resonator of embodiment 10 of the utility model.

[0032] Fig.11 This is a front view of the multi-frequency microstrip resonator of Example 11 of the utility model.

[0033] Fig.12 This is a front view of the multi-frequency microstrip resonator of Example 12 of the utility model.

[0034] Fig.13 This is a front view of the multi-frequency microstrip resonator of Example 13 of the utility model.

[0035] Fig.14 This is a front view of the multi-frequency microstrip resonator of Example 14 of the utility model.

[0036] The relevant marks in the above drawings are:

[0037] 100 - first microstrip line, 200 - second microstrip line, 300 - third microstrip line, 400 - fourth microstrip line. DETAILED DESCRIPTION

[0038] The utility model is described clearly and completely below in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the utility model based on these descriptions. Before describing the utility model in conjunction with the accompanying drawings, it should be particularly noted that:

[0039] The technical solutions and technical features provided in each part of the utility model, including the following description, can be combined with each other if there is no conflict.

[0040] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] About the terms and units in the present invention: The terms "include", "have" and any variations thereof in the specification and claims of the present invention and related parts are intended to cover non-exclusive inclusions.

[0042] Example 1

[0043] Figure 1 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0044] like Figure 1 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a straight line and both ends are open; the second microstrip line 200 is a closed loop; and the third microstrip line 300 is an open loop, one end of which is short-circuited and the other end is open.

[0045] The resonant frequency and quality factor (Q value) of the multi-frequency microstrip resonator were tested using electromagnetic field simulation software (HFSS15.0). The Q value is an indicator of the ratio of energy storage and loss of the resonator. A high Q value means low resonant loss, and the loss near the resonant frequency is relatively small. The test shows that the multi-frequency microstrip resonator has three resonant frequencies. The resonant frequencies of the first microstrip line 100, the second microstrip line 200, and the third microstrip line 300 are 2.09547 GHz, 1.85639 GHz, and 1.10845 GHz, respectively, and the Q values ​​are 232.959, 206.467, and 123.604, respectively, all of which have high Q values.

[0046] Example 2

[0047] Figure 2 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0048] like Figure 2 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom. The signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 arranged in a nested manner from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a straight line and both ends are open; the second microstrip line 200 and the third microstrip line 300 are both closed loops.

[0049] Example 3

[0050] Figure 3 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0051] like Figure 3 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a straight line and both ends are open; the second microstrip line 200 and the third microstrip line 300 are both open rings with opposite opening directions, both ends of the second microstrip line 200 are open, and one end of the third microstrip line 300 is short-circuited and the other end is open.

[0052] Example 4

[0053] Figure 4 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0054] like Figure 4 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom. The signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a straight line and both ends are open; the second microstrip line 200 is an open ring with one end short-circuited and the other end open; the third microstrip line 300 is a closed ring.

[0055] Example 5

[0056] Figure 5 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0057] like Figure 5 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom. The signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 arranged in a nested manner from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 and the second microstrip line 200 are both closed loops; and the third microstrip line 300 is an open loop with one end short-circuited and the other end open-circuited.

[0058] Example 6

[0059] Figure 6 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0060] like Figure 6The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100, the second microstrip line 200 and the third microstrip line 300 are all closed loops.

[0061] Example 7

[0062] Figure 7 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0063] like Figure 7 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a closed loop; the second microstrip line 200 and the third microstrip line 300 are both open loops with opposite opening directions, one end of the second microstrip line 200 is short-circuited and the other end is open-circuited, and both ends of the third microstrip line 300 are open-circuited.

[0064] Example 8

[0065] Figure 8 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0066] like Figure 8 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom. The signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a closed loop; the second microstrip line 200 is an open loop with one end short-circuited and the other end open-circuited; and the third microstrip line 300 is a closed loop.

[0067] Example 9

[0068] Fig. 9 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0069] like Fig. 9 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom. The signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is an open ring with both ends open; the second microstrip line 200 is a closed ring; and the third microstrip line 300 is an open ring with one end short-circuited and the other end open.

[0070] Example 10

[0071] Fig.10 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0072] like Fig.10 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom. The signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 arranged nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is an open ring with one end short-circuited and the other end open-circuited; the second microstrip line 200 and the third microstrip line 300 are both closed loops.

[0073] Embodiment 11

[0074] Fig.11 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0075] like Fig.11 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100, the second microstrip line 200 and the third microstrip line 300 are all open rings, and the opening directions of the two connected open rings are opposite, one end of the first microstrip line 100 is short-circuited and the other end is open-circuited, both ends of the second microstrip line 200 are open-circuited, and one end of the third microstrip line 300 is short-circuited and the other end is open-circuited.

[0076] Example 12

[0077] Fig.12 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0078] like Fig.12 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200 and a third microstrip line 300 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 and the second microstrip line 200 are both open rings with opposite opening directions, both ends of the first microstrip line 100 are open circuits, one end of the second microstrip line 200 is short circuited and the other end is open circuit; the third microstrip line 300 is a closed loop.

[0079] Example 13

[0080] Fig.13 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0081] like Fig.13 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200, a third microstrip line 300 and a fourth microstrip line 400 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a straight line and both ends are open; the second microstrip line 200 is a closed loop; the third microstrip line 300 and the fourth microstrip line 400 are both open loops, one end of the third microstrip line 300 is short-circuited and the other end is open, and one end of the fourth microstrip line 400 is short-circuited and the other end is open.

[0082] The ring in the above embodiment is a rectangular ring. The opening position of the open ring is set in the middle of the edge.

[0083] Embodiment 14

[0084] Fig.14 4 is a front view of the multi-frequency microstrip resonator of this embodiment.

[0085] like Fig.14 The multi-frequency microstrip resonator shown includes a signal line, an insulating medium and a metal ground distributed from top to bottom, the signal line includes a first microstrip line 100, a second microstrip line 200, a third microstrip line 300 and a fourth microstrip line 400 nested from inside to outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line 100 is a circular open ring with both ends open; the second microstrip line 200 is a circular closed ring; the third microstrip line 300 is a circular open ring with one end short-circuited and the other end open.

[0086] An embodiment of the microwave circuit device of the utility model includes the multi-frequency microstrip resonator described in any one of the above embodiments.

[0087] The above is an explanation of the relevant contents of the utility model. A person skilled in the art will be able to implement the utility model based on these explanations. Based on the above contents of the utility model, all other embodiments obtained by a person skilled in the art without creative work shall fall within the scope of protection of the utility model.

Claims

1. A multi-frequency microstrip resonator, comprising a signal line, an insulating medium and a metal ground distributed from top to bottom, characterized in that: The signal line includes at least three microstrip lines nested from the inside to the outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the shape of the microstrip line at the center is a straight line or a ring, and the shape of the microstrip lines at other positions is a ring, and the ring is an open ring or a closed ring.

2. The multi-frequency microstrip resonator according to claim 1, characterized in that: One end of the split ring is short-circuited, and the other end is open-circuited.

3. The multi-frequency microstrip resonator according to claim 1, characterized in that: The ring shape is polygonal, circular or elliptical.

4. The multi-frequency microstrip resonator according to claim 3, characterized in that: The ring shape is a rectangular ring.

5. The multi-frequency microstrip resonator according to claim 4, characterized in that: The opening position of the open ring is set at the middle of any side.

6. The multi-frequency microstrip resonator according to claim 1, characterized in that: When the microstrip line at the center is straight, both ends are open circuits.

7. The multi-frequency microstrip resonator according to claim 1, characterized in that: When two adjacent microstrip lines are open rings, the opening directions are different.

8. A multi-frequency microstrip resonator, comprising a signal line, an insulating medium and a metal ground arranged from top to bottom, characterized in that: The signal line includes a first microstrip line, a second microstrip line and a third microstrip line which are nested from the inside to the outside, and a ring-shaped coupling gap with uniform width is formed between two adjacent microstrip lines; wherein the first microstrip line is a straight line with both ends open; the second microstrip line is a closed loop; and the third microstrip line is an open loop with one end short-circuited and the other end open.

9. A microwave circuit device, characterized in that: The multi-frequency microstrip resonator comprises the multi-frequency microstrip resonator as claimed in any one of claims 1 to 8.

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