A Technology Independent Synthesis Approach for Integrated mmWave Coupled Line Circuits

Background: A new wireless multiple access technology enabled by using Time Modulated Arrays (TMAs) is proposed in this paper. Methods: It benefits due to the requirement of only a single Radio Frequency (RF) chain, compared with other multiple-RF-chain schemes. Results: As a result, it is able to greatly reduce the system cost, energy consumption, and complexity. Conclusion: In addition, the signal through the single RF chain is narrow-band modulated, reducing the signal Peak-to-Average-Power-Ratio (PAPR), thus, further enhancing the power efficiency of the RF chain, especially for power amplifiers. The operation principle and synthesis approach are elaborated in this paper, and are demonstrated with two examples.

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A UHF Compact Complex Impedance-transforming Balun with High Isolation

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2352096513666200212103557 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1135-1144

Author(s):

Kittipong Nithiporndecha ◽

Chatrpol Pakasiri

Keyword(s):

Complex Impedance ◽

Output Port ◽

Reflection Coefficients ◽

Coupled Line ◽

High Isolation ◽

Line Structure ◽

Source Impedance ◽

Phase Balance ◽

High Output

Background: A compact complex impedance-transforming balun for UHF frequencies, which is based on a coupled-line structure that matched all ports and provided high output port isolation, was designed in this paper. Methods: A lumped component transformation was used to minimize circuit size. The implemented circuit operated at 433 MHz with the reflection coefficients less than -16 dB at all ports, 0.22 dB amplitude balance and 180° phase balance at the output ports. The signal coupling between the output ports was -16.8 dB. The circuit size is small at 0.032λ. Results: Complex impedance-transforming baluns were designed to operate at 433 MHz. The source impedance at port 1 was set at Zs = 12 - j12Ω and the load impedances at port 2 and 3 were set at ZL = 80 + j30Ω. Conclusion: A compact complex impedance-transforming balun at UHF frequency, with all ports matched and high isolations, was designed and illustrated in this paper.

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Synthesis approach to the study of a class of nonlinear systems

Electronics Letters ◽

10.1049/el:19700420 ◽

1970 ◽

Vol 6 (19) ◽

pp. 602 ◽

Cited By ~ 1

Author(s):

B.V. Dasarathy

Keyword(s):

Nonlinear Systems ◽

Synthesis Approach

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Novel Dual-Band Bandpass Filters Using Short-Circuited Coupled-Line Resonator

2020 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) ◽

10.1109/imws-amp49156.2020.9199672 ◽

2020 ◽

Author(s):

Wei Nie ◽

Zhi Chao Han ◽

Ying Hao Wang ◽

Liang Bo Xie ◽

Mu Zhou

Keyword(s):

Bandpass Filters ◽

Dual Band ◽

Coupled Line

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Couplinator: A simple computational tool for synthesis of multi-section coupled-line filter based on MPCM-TLM technique

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721000167 ◽

2021 ◽

pp. 1-10

Author(s):

E. Faghand ◽

S. Karimian ◽

E. Mehrshahi ◽

N. Karimian

Keyword(s):

Comparative Analysis ◽

Transmission Line ◽

High Frequency ◽

Computational Tool ◽

Cad Tools ◽

Coupled Line ◽

High Frequency Structure Simulator ◽

Transmission Line Method ◽

Set Up ◽

Planar Circuit

Abstract A new simple computational tool is proposed for the synthesis of multi-section coupled-line filters based on combined modified planar circuit method (MPCM) and transmission line method (TLM) analysis, referred to as MPCM-TLM. Due to its fundamentally simple architecture, the presented tool offers significantly faster optimization of coupled-line filters – for exactly the same initial simulation set-up – than other costly commercially-available tools, giving equally reliable results. Validity and accuracy of the proposed tool have been verified through the design of 3rd, 5th, and 7th order coupled-line filters and comparative analysis between results obtained from the proposed approach and the high-frequency structure simulator. A remarkable 99% time reduction in the analysis is recorded in the case of 7th order filter using the proposed tool, for almost identical results to HFSS. Therefore, it can be confidently claimed that the proposed technique can be used as a reliable alternative to existing complex, costly, processor-intensive CAD tools.

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