High-isolation high-temperature superconductive diplexer and design method thereof

A high-isolation, high-temperature superconducting technology, applied in the field of microwave communication, can solve the problems of discontinuous matching impedance, deterioration of multiplexer performance, large-scale structure, etc., and achieve the effect of feasible operation, excellent performance, and improved isolation.

Active Publication Date: 2017-02-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Isolation has always been one of the most important indicators of duplexers. Improving isolation can effectively prevent signal crosstalk between two channels. Literature [1] C.Feng, X.B.Guo, X.P.Zhang, X.X.Lu, B.Wei, W.Chen, Y.Zhang, Q.R.Li, Z.J.Ying, B.S.Cao, Design and performance of a compact superconducting duplexer at VHF-band, Physica C: Superconductivity.470(2010)1959-1961 designed a VHF band superconducting duplexer In this method, the two-channel filters are packaged in two shielding boxes, and then a metal partition is added between the two channels for isolation, and connected by spot welding, which effectively improves the isolation between the channels. This is the most widely used method of improving isolation. The advantage of this method is that it can make the structure

Method used

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  • High-isolation high-temperature superconductive diplexer and design method thereof
  • High-isolation high-temperature superconductive diplexer and design method thereof
  • High-isolation high-temperature superconductive diplexer and design method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0031] Example 1, see attached figure 2 , A high-isolation high-temperature superconducting duplexer, including two filter channels composed of two or more resonators and a common port;

[0032] The two filter channels are located on the left and right sides of the common port, forming a T-shaped structure with the common port, and are connected to each other through a microstrip line; the two filter channels, the common port and the microstrip line are processed on the upper layer 1 of the substrate 2. The lower layer of sheet 2 is ground layer 3; substrate 2 is made of magnesium oxide MgO material, or lanthanum aluminate LaAlO3 material, sapphire material, dielectric constant is set to 9.7, thickness h is 0.5mm, upper layer 1 and ground layer 3 are both yttrium Barium copper oxide YBCO superconducting film.

Example Embodiment

[0033] Example 2: See attached Figure 2-10 , The resonator in the high-isolation high-temperature superconducting duplexer described in Embodiment 1 is further limited, and the resonator is determined based on the center frequencies of the two filter channels being 9.9 GHz and 10.02 GHz, respectively Both the first resonator 5 and the second resonator 6 of a double bending line structure;

[0034] The uppermost protrusion 50 of the first resonator 5 is at the left end, and the uppermost protrusion 60 of the second resonator 6 is at the middle. The body width and gap of the first resonator 5 and the second resonator 6 are both 0.3mm; 9.9GHz filter The filter channel includes six symmetrically arranged first resonators 5, and the 10.02GHz filter channel includes six symmetrical second resonators 6; the overall size of the two filter channels is 24mm×8mm, and the input end feeder 57 or 67 and the first section of resonator 51 or 61, the output end feed line 58 or 68 and the sixth s...

Example Embodiment

[0036] Example 3: See attached Figure 11-18 , The resonator in the high-isolation high-temperature superconducting duplexer described in Embodiment 1 is further limited, and the resonator is determined based on the center frequencies of the two filter channels being 2.69 GHz and 2.84 GHz, respectively Both the third resonator 7 and the fourth resonator 8 of a single spiral structure;

[0037] The body width of the third resonator 7 and the fourth resonator 8 are both 0.2mm, and the gap is 0.24mm; the height of the third resonator 7 is 2.96mm, and the length of the first section is 2.4mm; the height of the fourth resonator 8 It is 2.88mm, and the length of the first section is 2.36mm;

[0038] The 2.69GHz filter channel includes eight third resonators 7. The distance between the first resonator 71 and the second resonator 72, and the distance between the seventh resonator 77 and the eighth resonator 78 is 0.66. mm, the distance between the second section of resonator 72 and the t...

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Abstract

The invention belongs to the technical field of microwave communication, and specifically relates to a high-temperature superconductive diplexer. The technical scheme of the high-isolation high-temperature superconductive diplexer is that two filter channels are respectively arranged at the left and right sides of a common port, and form a T-shaped structure together with the common port, and are mutually connected with each other through a microstrip line; the filter channels, the common port and the microstrip line are processed on an upper layer (1) of a substrate (2); an lower layer of the substrate (2) is a ground layer (3); the substrate (2) is made of magnesium oxide MgO material, or lanthanum aluminate LaAlO3 material and sapphire material; the dielectric constant of the substrate (2) is set as 9.7, and the thickness of the substrate (2) is set as 0.5mm; and both the upper layer (1) and the ground layer (3) are yttrium barium copper oxygen (YBCO) superconductive films. The high-isolation high-temperature superconductive diplexer and the design method thereof can effectively improve the isolation and avoid discontinuity of the microstrip line because of spot welding connection so as to enable the impedance characteristic of a transmission line after preparation to be identical to the design. Therefore, a diplexer with high performance can be obtained.

Description

technical field [0001] The invention belongs to the technical field of microwave communication, and in particular relates to a high-temperature superconducting duplexer. Background technique [0002] High-temperature superconducting filters have the advantages of low insertion loss, high band edge steepness and good out-of-band suppression, which can effectively improve the sensitivity and anti-interference ability of the system, so they are widely used in the fields of mobile communication, radio astronomy and radar detection. As multi-channel communication and frequency hopping communication systems tend to be miniaturized and integrated, superconducting filter technology shows important application value. [0003] A duplexer is a frequency divider consisting of two filters of different frequencies connected in parallel or in series. Split into two narrow-band signal outputs. The trend of wireless communication systems is developing toward miniaturization and integration...

Claims

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Application Information

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IPC IPC(8): H01P1/213
Inventor 魏斌曹必松郭旭波王翔姜立楠
Owner TSINGHUA UNIV
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