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Composite left and right handed transmission line and its design method and duplexer based on the transmission line

A technology that combines left and right hands and transmission lines. It is used in impedance networks, electrical components, and multi-terminal-pair networks. It can solve the problems of high frequency, cumbersome processing, and high price.

Active Publication Date: 2011-12-28
许河秀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing duplexer technology has some defects, such as complex design methods, limited by the resonance of lumped components, the frequency cannot be made high, the processing process is cumbersome and expensive, or the circuit size is large and difficult to promote, etc.

Method used

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  • Composite left and right handed transmission line and its design method and duplexer based on the transmission line
  • Composite left and right handed transmission line and its design method and duplexer based on the transmission line
  • Composite left and right handed transmission line and its design method and duplexer based on the transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Such as figure 1 A composite left and right handed transmission line is shown, including a pair of complementary open single-ring resonators 2 etched on the ground layer 1 of the microstrip line and a microstrip slot 3 etched on the conduction band 4 of the microstrip line, the The microstrip slot 3 is located directly above the pair of complementary split single-ring resonators 2 . The pair of complementary split-ring resonators 2 includes two split-ring resonators with the same structure and size and arranged symmetrically. The split-ring resonators are etched on the ground layer 1 of the microstrip line and one side There is a resonant ring with an opening in the middle, and two of the openings of the two opening single-ring resonators are arranged in the middle of the pair of complementary opening single-ring resonators 2 . The microstrip line ground layer 1, the pair of complementary open single-ring resonators etched on the microstrip line ground layer 1, the mic...

Embodiment 2

[0101] Such as Figure 4 As shown, the difference between the composite left-handed left-handed transmission line described in this embodiment and the CRLH TL unit A described in Embodiment 1 is that the two split-ring resonators in the complementary split-ring resonator pair 2 are It is symmetrically arranged left and right, and there are two upper and lower annular grooves etched inside the resonant ring in the open single-ring resonator. The structure and size of the upper and lower two annular grooves are the same, and the centerline of the resonant ring Symmetrically arranged for the symmetrical axis, the starting ends of the upper and lower two annular grooves are respectively connected to the two ends of the opening of the resonant ring; the number of the annular grooves set inside the complementary open single ring resonator pair There are four ring grooves inside the two open single-ring resonators arranged symmetrically from left to right, and the ring grooves are fr...

Embodiment 3

[0141] In this example, if Figure 7 Shown in CRLH TL unit B with Example 2 Figure 4 The difference between the shown CRLHTL unit B is that: four slant grooves 10 for adjusting the operating frequency of the CRLH TL unit B are also etched in the CRLH TL unit B, and the structure and size of the four slant grooves 10 are the same , and the starting ends of the four chutes 10 are respectively connected to the ends of the fractal curves 4 in the four fractal geometric structures 9, and the four chutes 10 are carried out with the center line of the CRLH TL unit B as the line of symmetry Symmetrical arrangement. In this embodiment, K-ECSSRRP is also made up of a square outer ring and four fractal extended small inner rings with exactly the same structure, but an inclined linear groove (i.e. the chute) is extended on the fourth side of the inner ring. to adjust the frequency.

[0142] In this example, if Figure 7 The shown CRLH TL unit B operates at 2.2GHz and has a size of on...

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Abstract

The invention discloses a composite right / left handed transmission line and a design method thereof as well as a duplexer based on the transmission line. The composite right / left handed transmission line is a CRLH TL (composite right / left handed transmission line) unit A consisting of a complementary open single ring resonator pair and a micro-band gap or a CRLH TL unit B consisting of the complementary open single ring resonator pair, a fractal geometry structure and the micro-band gap. The design method comprises the following steps: 1. constructing an equivalent circuit model; 2.fitting a plurality of lumped circuit parameter values; 3. verifying the lumped circuit parameter values; and 4. confirming physical structure parameters. The duplexer comprises two CRLH TL units A or two CRLH TL units B. Seamless transition between left hand and right hand pass bands of the CRLH TL units adopted by the invention can be realized, the left hand and right hand pass bands are very easy to adjust so as to operate at a balance state, simultaneously the optimization and design method are simple and are convenient to realize, the design effect is good, additionally the composite duplexer has a compact structure, small volume, wide band width and good selection.

Description

technical field [0001] The invention belongs to the technical field of microwave communication, and in particular relates to a composite left-handed transmission line, a design method thereof and a duplexer based on the transmission line. Background technique [0002] As early as 1968, the former Soviet scientist veselago theoretically predicted the existence of left-handed materials with negative permittivity and magnetic permeability at the same time and the strange electromagnetic physical properties that traditional electromagnetic media do not have, such as negative refractive index, evanescence, etc. Evanescent wave amplification, inverse Doppler effect, inverse Cerenkov radiation, perfect prism, etc. However, its theoretical achievements have not attracted international attention for a long time. It was not until 2000 that Smith made the first left-handed material with space-periodically arranged metal wires and split-ring resonators based on the work of Pendry et al...

Claims

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Application Information

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IPC IPC(8): H03H7/01
Inventor 许河秀王光明张晨新
Owner 许河秀
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