An ultra-wideband micro-coaxial 180° phase shifter

Abstract

The application discloses an ultra-wideband micro coaxial 180-degree phase shifter, which comprises a main path and a reference path; the main path is composed of a 180-degree reverse phase transition structure; and the reference path is composed of a 0-degree straight-through transmission structure. The application realizes the wideband 180-degree phase shifter through a rectangular micro coaxial slot structure to build an inner and outer conductor reverse connection structure, has the advantages of miniaturization and low loss, and can build a three-dimensional millimeter wave system with miniaturization, light weight, high integration and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to an ultra-wideband micro coaxial 180° phase shifter, belonging to the technical field of microwave devices and the field of phase shifters. BACKGROUND

[0002] A phase shifter is an important microwave device. The traditional differential phase shifter is to realize the phase shift by the length difference of two transmission lines, or to realize the phase shift by changing the propagation constant of the transmission line in the case of the same length.

[0003] With the continuous development of wireless communication technology, more and more electronic information systems are developing towards small size, light weight, low loss and higher performance. The existing microstrip line, stripline, coplanar waveguide and other transmission lines will have problems such as dielectric loss. With the continuous development of radio frequency micro-electromechanical systems, rectangular micro coaxial transmission lines emerge as the times require, and their performance has greater advantages than traditional transmission line structures in the field of millimeter wave broadband.

[0004] Document 1 (K. Dmitry, S. Elena, V. Irina, et al. Broadband digital phase shifter based on switchable right-and left-handed transmission line sections[J]. IEEE Microwave and Wireless Components Letters, 2006, 16(5):258~260) proposes a 180° switch line phase shifter with a coplanar waveguide multilayer structure. Although this design is theoretically clear and simple, the structure needs to load lumped elements, which makes the structure processing complex, resulting in large errors.

[0005] Document 2 (M. A. Antoniades and G. V. Eleftheriades. A broadband Wilkinson balun using microstrip metamaterial lines [J]. IEEE Antennas and Wireless Propagation Letters, 2005, 4:209~212) proposes a broadband 180° phase shifter of left and right-handed transmission lines with lumped elements. This design method has excellent return loss, isolation and pass characteristics, while still maintaining the advantage of small size, but the bandwidth is limited to 1.17GHz to 2.33GHz.

[0006] In summary, the prior art realizes the structure of the microstrip transmission line phase shifter with miniaturization, light weight, low loss and better performance, and the bandwidth is narrow, how to design and manufacture a wideband phase shifter with low loss and amplitude balance is an urgent problem to be solved in the field of microwave radio frequency. SUMMARY

[0007] The application aims to provide an ultra-wideband micro coaxial 180° phase shifter with miniaturization, compact structure and small insertion loss.

[0008] The technical solution for achieving the purpose of the application is:

[0009] An ultra-wideband micro coaxial 180° phase shifter comprises a main path, a reference path, a first input port and a first output port located at both ends of the main path, and a second input port and a second output port located at both ends of the reference path.

[0010] The main path is composed of a 180° reverse phase transition structure, and the reference path is composed of a 0° straight-through transmission structure.

[0011] As a preferred scheme of the application, the main path is composed of a first rectangular micro coaxial structure, a first coplanar waveguide structure, a rectangular micro coaxial reverse phase structure, a second coplanar waveguide structure and a second rectangular micro coaxial structure connected in sequence, and the lower surfaces of the first rectangular micro coaxial structure, the first coplanar waveguide structure and the first rectangular micro coaxial reverse phase structure are flush, and the upper surfaces of the first rectangular micro coaxial reverse phase structure, the second coplanar waveguide structure and the second rectangular micro coaxial structure are flush.

[0012] As a preferred scheme of the application, the first rectangular micro coaxial structure and the second rectangular micro coaxial structure are each composed of an outer conductor and an inner conductor, and the inner conductor is located at the central position in the air cavity of the outer conductor.

[0013] The first coplanar waveguide structure and the second coplanar waveguide structure are each composed of a ground conductor and a center conductor, and the center conductor is located directly above the ground conductor.

[0014] As a preferred scheme of the application, the inner conductor of the first rectangular micro coaxial structure, the inner conductor of the second rectangular micro coaxial structure, the center conductor of the first coplanar waveguide structure and the center conductor of the second coplanar waveguide structure have the same structure size and are located on the same straight line.

[0015] As a preferred scheme of the application, the first rectangular micro coaxial structure and the second rectangular micro coaxial structure have the same structure and size, and the first coplanar waveguide structure and the second coplanar waveguide structure have the same structure size.

[0016] As a preferred scheme of the present application, the rectangular micro coaxial reverse phase structure is achieved by slotting the outer conductor of a complete rectangular micro coaxial into two parts of upper and lower ground outer conductors, and by splitting the inner conductor of the complete rectangular micro coaxial into two parts of upper and lower ground inner conductors, thereby realizing the 180° reverse phase structure.

[0017] The upper ground outer conductor is connected with the ground conductor of the second coplanar waveguide structure, and the lower ground outer conductor is connected with the ground conductor of the first coplanar waveguide structure.

[0018] As a preferred scheme of the present application, the reference path is composed of a third rectangular micro coaxial structure, a third coplanar waveguide structure, a fourth rectangular micro coaxial structure, a fourth coplanar waveguide structure, and a fifth rectangular micro coaxial structure connected in sequence, the lower surfaces of the third rectangular micro coaxial structure, the third coplanar waveguide structure, and the fourth rectangular micro coaxial structure are flush, and the upper surfaces of the fourth rectangular micro coaxial structure, the fourth coplanar waveguide structure, and the fifth rectangular micro coaxial structure are flush.

[0019] As a preferred scheme of the present application, the third rectangular micro coaxial structure, the fourth rectangular micro coaxial structure, and the fifth rectangular micro coaxial structure are each composed of an outer conductor and an inner conductor, and the inner conductor is located at the central position in the air cavity of the outer conductor.

[0020] The third coplanar waveguide structure and the fourth coplanar waveguide structure are each composed of a ground conductor and a center conductor, and the center conductor is located directly above the ground conductor.

[0021] As a preferred scheme of the present application, the inner conductors of the third rectangular micro coaxial structure, the fourth rectangular micro coaxial structure, and the fifth rectangular micro coaxial structure, and the center conductors of the third coplanar waveguide structure and the fourth coplanar waveguide structure are of the same structure size and are located on the same straight line.

[0022] As a preferred scheme of the present application, the third rectangular micro coaxial structure, the fourth rectangular micro coaxial structure, and the fifth rectangular micro coaxial structure are of the same structure size, and the third coplanar waveguide structure and the fourth coplanar waveguide structure are of the same structure size.

[0023] Compared with the phase shifter of the conventional transmission line structure of the prior art, the present application realizes 180° phase shift by reverse connection of the inner and outer conductors in the rectangular micro coaxial reverse phase structure of the main path, so that the design structure is simple and easier to realize; the rectangular micro coaxial technology is used, and the advantages of low dispersion, high isolation, low loss, and the like are achieved; and the working performance of ultra wideband is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The figure is a structural schematic diagram of the present application.

[0025] Figure 2 The figure is a structural schematic diagram of the present application.Figure 1 Structure diagram of the main path.

[0026] Figure 3 For Figure 1 Structure diagram of the main path.

[0027] Figure 4 For Figure 1 Structure diagram of the rectangular micro-coaxial reverse phase structure of the main path.

[0028] Figure 5 For Figure 1 Structure diagram of the rectangular micro-coaxial structure.

[0029] Figure 6 For Figure 1 Size diagram of the main path from the top view.

[0030] Figure 7 For Figure 1 Size diagram of the main path from the front view.

[0031] Figure 8 For Figure 1 Size diagram of the main path from the side view.

[0032] Figure 9 For Figure 1 Size diagram of the reference path from the top view.

[0033] Figure 10 For Figure 1 Size diagram of the reference path from the front view.

[0034] Figure 11 For Figure 1 Size diagram of the reference path from the side view.

[0035] Figure 12 S-parameter diagram of the application in Ansys Electronics Desktop simulation.

[0036] Figure 13 Phase difference diagram of the application in Ansys Electronics Desktop simulation.

[0037] Wherein: 01 - the first input port, 02 - the first output port, 03 - the second input port, 04 - the second output port, 1 - the main path, 10 - the rectangular micro coaxial structure in the main path, 11 - the coplanar waveguide structure in the main path, 12 - the rectangular micro coaxial reverse phase structure in the main path, 13 - the coplanar waveguide structure in the main path, 14 - the rectangular micro coaxial structure in the main path, 2 - the reference path, 20 - the rectangular micro coaxial structure in the reference path, 21 - the coplanar waveguide structure in the reference path, 22 - the rectangular micro coaxial structure in the reference path, 23 - the coplanar waveguide structure in the reference path, 24 - the rectangular micro coaxial structure in the reference path, 020 - the outer conductor of 20, 023 - the inner conductor of 20, 025 - the ground conductor of 13, 024 - the center conductor of 21, 026 - the inner and outer conductor of 22, 021 - the inner conductor of 22, 027 - the ground conductor of 11, 028 - the center conductor of 23, 022 - the outer conductor of 24, 026 - the inner conductor of 22, 031 - the outer conductor of 10, 030 - the inner conductor of 10, 033 - the ground conductor of 11, 032 - the center conductor of 11, 036 - the outer conductor of 14, 037 - the inner conductor of 14, 034 - the ground conductor of 13, 035 - the center conductor of 13, 304 - the upper ground outer conductor of 12, 301 - the lower ground outer conductor of 12, 303 - the upper ground inner conductor of 12, 302 - the lower inner conductor structure of 12, 401 - the outer conductor of the rectangular micro coaxial, 402 - the inner conductor of the rectangular micro coaxial, 029 - the inner conductor of 24. DETAILED DESCRIPTION

[0038] The application will be further described in conjunction with the drawings and specific embodiments.

[0039] In conjunction with Figure 1 , the application is an ultra-wideband micro coaxial 180° phase shifter, which comprises a main path 1, a reference path 2, two input ports 01, 03 and two output ports 02, 04; the main path 1 is composed of a 180° reverse phase transition structure; the reference path 2 is composed of a 0° phase shift structure.

[0040] The main path 1 sequentially passes through the rectangular micro coaxial structure 10, the coplanar waveguide structure 11, the rectangular micro coaxial reverse phase structure 12, the coplanar waveguide structure 13 and the rectangular micro coaxial structure 14 to complete the complete transmission line transition transmission; the reference path 2 sequentially passes through the rectangular micro coaxial structure 20, the coplanar waveguide structure 21, the rectangular micro coaxial structure 22, the coplanar waveguide structure 23 and the rectangular micro coaxial structure 24 to complete the transmission.

[0041] In conjunction with Figure 1 and Figure 2, the rectangular micro-coaxial structure 20 in the reference path 2 is composed of an outer conductor 020 and an inner conductor 023; the rectangular micro-coaxial structure 22 in the reference path 2 is composed of an outer conductor 021 and an inner conductor 026; the rectangular micro-coaxial structure 24 in the reference path 2 is composed of an outer conductor 022 and an inner conductor 029; the coplanar waveguide structure 21 in the reference path 2 is composed of a ground conductor 025 and a center conductor 024; the coplanar waveguide structure 23 in the reference path 2 is also composed of a ground conductor 027 and a center conductor 028.

[0042] In combination with Figure 1 , Figure 3 and Figure 4 , the rectangular micro-coaxial structure 10 in the main path 1 is composed of an outer conductor 031 and an inner conductor 030, and the inner conductor 030 of the rectangular micro-coaxial structure 10 is located at the center of the cavity of the outer conductor 031; the rectangular micro-coaxial structure 14 in the main path 1 is composed of an outer conductor 036 and an inner conductor 037; the coplanar waveguide structure 11 in the main path 1 is composed of a ground conductor 033 and a center conductor 032; the coplanar waveguide structure 13 in the main path 1 is also composed of a ground conductor 034 and a center conductor 035.

[0043] In combination with Figure 2 , Figure 3 and Figure 4 , the lower surface of the ground conductor 033 of the coplanar waveguide structure 11 in the main path 1 is flush with the lower surface of the outer conductor 031 of the rectangular micro-coaxial structure 10 in the main path 1 and the lower surface of the lower ground outer conductor 301 in the rectangular micro-coaxial inverting structure 12; the upper surface of the ground conductor 034 of the coplanar waveguide structure 13 in the main path 1 is flush with the upper surface of the outer conductor 036 of the rectangular micro-coaxial structure 14 in the main path 1 and the upper surface of the upper ground outer conductor 304 in the rectangular micro-coaxial inverting structure 12; the lower surface of the ground conductor 025 of the coplanar waveguide structure 21 in the reference path 2 is flush with the lower surface of the outer conductor 020 of the rectangular micro-coaxial structure 20 in the reference path 2 and the lower surface of the outer conductor 021 of the rectangular micro-coaxial structure 22 in the reference path 2; the upper surface of the ground conductor 027 of the coplanar waveguide structure 23 in the reference path 2 is flush with the upper surface of the outer conductor 021 of the rectangular micro-coaxial structure 22 in the reference path 2 and the upper surface of the outer conductor 022 of the rectangular micro-coaxial structure 24 in the reference path 2.

[0044] In combination with Figure 3 and Figure 4The rectangular micro coaxial reverse phase structure 12 in the main path 1 is achieved by slotting a complete rectangular micro coaxial outer conductor 401 into two parts of upper and lower ground outer conductors 304 and 301, and by dividing a complete rectangular micro coaxial inner conductor 402 into two parts of upper and lower ground inner conductors 303 and 302, thereby achieving a 180° reverse phase structure.

[0045] The upper ground outer conductor 304 in the rectangular micro coaxial reverse phase structure 12 in the main path 1 is connected with the ground conductor 025 in the coplanar waveguide structure 13 in the main path 1; the lower ground outer conductor 30 in the rectangular micro coaxial reverse phase structure 12 in the main path 1 is connected with the ground conductor 027 in the coplanar waveguide structure 11 in the main path 1.

[0046] In combination with Figure 1 , Figure 2 , Figure 3 and Figure 4 The rectangular micro coaxial structure 10 in the main path 1 is consistent with the rectangular micro coaxial structure 14 in size; the rectangular micro coaxial structure 20, the rectangular micro coaxial structure 22 and the rectangular micro coaxial structure 24 in the reference path 2 are consistent in size. The coplanar waveguide structure 11 and the coplanar waveguide structure 13 in the main path 1 are not consistent with the coplanar waveguide structure 21 and the coplanar waveguide structure 23 in the reference path 2 in size.

[0047] The main path 1 and the reference path 2 together present a central symmetric structure. The conductor material of the main path 1 and the reference path 2 is copper.

[0048] The application will be further described in detail below in combination with specific embodiments. Embodiment

[0049] The structure of the wideband micro coaxial 180° phase shifter is shown in Figure 1 The reference path is shown in Figure 2 The main path and the rectangular micro coaxial reverse phase structure in the main path are shown in Figure 3 and Figure 4 The complete rectangular micro coaxial structure is shown in Figure 5 The sizes of the three views of the main path 1 and the reference path 2 are shown in Figures 6 to 11 The conductor material used in the application is copper. In combination with Figures 6 to 8The size parameters of the main path 1 of the phase shifter shown are as follows: G1=0.6mm, G2=0.3mm, L1=13.4mm, L22=1.4mm, L23=4mm, LW1=1.3mm, W2=0.9mm, W3=0.32mm, W4=0.2mm, W5=0.95mm, H1=0.9mm, H2=0.3mm, H3=0.3mm, h1=0.1mm, h2=0.2mm, h3=0.1mm. In combination Figures 9 to 11 , the size parameters of the reference path 2 of the phase shifter are as follows:

[0050] W1=1.3mm, W2=0.9mm, W3=0.32mm, W0=0.25mm, L12=2mm, L11=4mm, H1=0.9mm, H2=0.3mm, h1=0.1mm, H0=0.5mm, ww=1.2mm, L0=14mm. The impedances of the two input ports (01), (03) and the two output ports (02), (04) in this example are 50Ω±1Ω.

[0051] The ultra-wideband micro coaxial 180° phase shifter in this example is modeled and simulated in the HFSS block of the electromagnetic simulation software Ansys Electronics Desktop. Figure 12 The S parameter graphs of the present application in Ansys Electronics Desktop simulation, namely the insertion loss S(2,1) and return loss S(1,1) of the main path 1 and the insertion loss S(4,3) and return loss S(3,3) of the reference path 2, are shown in Figures 1 and 2. Figure 13 It can be seen that the center frequency of the 180° phase shifter is 10.5GHz, which is an all-pass band phase shifter, the insertion loss in the passband of the main path 1 is 0±0.56dB, the return loss is less than 20dB, the insertion loss S(4,3) in the passband of the reference path 2 is 0±0.2dB, and the return loss S(3,3) is less than 25dB. Figure 7 The phase difference of S(2,1) and S(4,3) in the simulation of the present application is shown in Figure 3, that is, the phase shifter realizes a phase of 180°±4° through the main path and the reference path, with a small error.

[0052] In summary, the ultra-wideband micro coaxial 180° phase shifter of the present application realizes a small, light, low-loss and ultra-wideband 180° phase shifter with good performance through rectangular micro coaxial technology, and is suitable for millimeter wave radio frequency micro electro mechanical systems.

[0053] It should be noted that the above description of the embodiments is only used to help understand the method of the present application and its core idea. Those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications are also within the protection scope of the claims of the present application.

Claims

1. An ultra-wideband micro-coaxial 180° phase shifter, characterized in that: It comprises a main path (1), a reference path (2), a first input port (01) and a first output port (02) located at two ends of the main path (1), and a second input port (03) and a second output port (04) located at two ends of the reference path (2); The main path (1) is composed of a 180° anti-phase transition structure, and the reference path (2) is composed of a 0° straight-through transmission structure; The main path (1) is composed of a first rectangular micro-coaxial structure (10), a first coplanar waveguide structure (11), a rectangular micro-coaxial anti-phase structure (12), a second coplanar waveguide structure (13), and a second rectangular micro-coaxial structure (14) connected in sequence, and the lower surfaces of the first rectangular micro-coaxial structure (10), the first coplanar waveguide structure (11), and the first rectangular micro-coaxial anti-phase structure (12) are flush, and the upper surfaces of the first rectangular micro-coaxial anti-phase structure (12), the second coplanar waveguide structure (13), and the second rectangular micro-coaxial structure (14) are flush; The reference path (2) is composed of a third rectangular micro-coaxial structure (20), a third coplanar waveguide structure (21), a fourth rectangular micro-coaxial structure (22), a fourth coplanar waveguide structure (23), and a fifth rectangular micro-coaxial structure (24) connected in sequence, wherein the lower surfaces of the third rectangular micro-coaxial structure (20), the third coplanar waveguide structure (21), and the fourth rectangular micro-coaxial structure (22) are flush, and the upper surfaces of the fourth rectangular micro-coaxial structure (22), the fourth coplanar waveguide structure (23), and the fifth rectangular micro-coaxial structure (24) are flush; The rectangular micro-coaxial anti-phase structure (12) is achieved by slotting a complete rectangular micro-coaxial outer conductor into an upper grounded outer conductor (304) and a lower grounded outer conductor (301), and by splitting the complete rectangular micro-coaxial inner conductor into an upper grounded inner conductor (303) and a lower grounded inner conductor (302), thereby achieving a 180° anti-phase structure. The upper grounding outer conductor (304) is connected to the grounding conductor (025) of the second coplanar waveguide structure (13), and the lower grounding outer conductor (301) is connected to the grounding conductor (027) of the first coplanar waveguide structure (11).

2. The ultra-wideband micro-coaxial 180° phase shifter according to claim 1, characterized in that: The first rectangular micro-coaxial structure (10) and the second rectangular micro-coaxial structure (14) are both composed of an outer conductor and an inner conductor, and the inner conductor is located at the exact center of the air cavity of the outer conductor; The first coplanar waveguide structure (11) and the second coplanar waveguide structure (13) are both composed of a ground conductor and a center conductor, and the center conductor is located directly above the ground conductor.

3. The ultra-wideband micro-coaxial 180° phase shifter according to claim 2, characterized in that: The inner conductor (030) of the first rectangular micro-coaxial structure (10), the inner conductor (037) of the second rectangular micro-coaxial structure (14), the central conductor (032) of the first coplanar waveguide structure (11), and the central conductor (035) of the second coplanar waveguide structure (13) have the same structural dimensions and are located on the same straight line.

4. The ultra-wideband micro-coaxial 180° phase shifter according to claim 1, characterized in that: The first rectangular micro-coaxial structure (10) and the second rectangular micro-coaxial structure (14) have the same structure and size, and the first coplanar waveguide structure (11) and the second coplanar waveguide structure (13) have the same structure and size.

5. The ultra-wideband micro-coaxial 180° phase shifter according to claim 1, characterized in that: The third rectangular micro-coaxial structure (20), the fourth rectangular micro-coaxial structure (22), and the fifth rectangular micro-coaxial structure (24) are all composed of an outer conductor and an inner conductor, and the inner conductor is located at the exact center of the air cavity of the outer conductor; The third coplanar waveguide structure (21) and the fourth coplanar waveguide structure (23) are both composed of a ground conductor and a center conductor, and the center conductor is located directly above the ground conductor.

6. The ultra-wideband micro-coaxial 180° phase shifter according to claim 5, characterized in that: The inner conductor (023) of the third rectangular micro-coaxial structure (20), the inner conductor (026) of the fourth rectangular micro-coaxial structure (22), the inner conductor (029) of the fifth rectangular micro-coaxial structure (24), the central conductor (024) of the third coplanar waveguide structure (21), and the central conductor (028) of the fourth coplanar waveguide structure (23) have the same structural dimensions and are located on the same straight line.

7. The ultra-wideband micro-coaxial 180° phase shifter according to claim 1, characterized in that: The third rectangular micro-coaxial structure (20), the fourth rectangular micro-coaxial structure (22), and the fifth rectangular micro-coaxial structure (24) have the same structural dimensions, and the third coplanar waveguide structure (21) and the fourth coplanar waveguide structure (23) have the same structural dimensions.

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