Compact wideband multi-section quarter-wave-like transformers

Satitchantrakul, Thanatcha; Akkaraekthalin, Prayoot; Silapunt, Rardchawadee; Torrungrueng, Danai

doi:10.1080/09205071.2018.1482239

Cited by 7 publications

(14 citation statements)

References 19 publications

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“…Moreover, the RRTs using CCITLs will be implemented using microstrips to verify the proposed technique. In order to implement these, Z c  in ( 8) can be written in terms of the ABCD parameters as [15][16][17] ± c 2 2 j 4 ( )…”

Section: Rrts Implemented Using Ccitlsmentioning

confidence: 99%

“…where the ABCD parameters in ( 16) are associated with the implemented RRT circuit using CCITLs. In addition, θ c in ( 14) can be written in terms of the ABCD parameters as [15][16][17] c cos . 2…”

Section: Rrts Implemented Using Ccitlsmentioning

confidence: 99%

“…This paper proposes the novel method to reduce size of reactance-to-reactance transformers (RRTs) by using conjugately characteristic-impedance transmission lines (CCITLs). Note that CCITLs have been first proposed in 2004 [10] and widely applied later [11][12][13][14][15][16][17]. CCITLs are lossless transmission lines (TLs) with conjugate characteristic impedances for forward (Z c + ) and backward (Z c -) propagation directions.…”

Section: Introductionmentioning

confidence: 99%

“…CCITLs are lossless transmission lines (TLs) with conjugate characteristic impedances for forward (Z c + ) and backward (Z c -) propagation directions. Interestingly, CCITLs can be applied to miniaturize microwave components [14][15][16]. To intuitively and effectively design CCITLs, Meta-Smith charts (MSCs) can be applied [17].…”

Section: Introductionmentioning

confidence: 99%

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Design of Reactance-to-Reactance Impedance Transformers Based on Conjugately Characteristic-Impedance Transmission Lines (CCITLs) and Meta-Smith Charts (MSCs)

Satitchantrakul¹,

Torrungrueng²

2021

RADIOENGINEERING

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This paper proposes a novel technique to miniaturize the size of any reactance-to-reactance transformers (RRTs). These transformers are designed based on conjugately characteristic-impedance transmission lines (CCITLs)and Meta-Smith charts (MSCs). Note that the proposed technique can be effectively applied to popular microwave circuits; i.e., open-circuited and short-circuited tuning stubs as special cases. Numerical results are calculated, analyzed and compared with those of conventional stubs. In addition, the RRT prototype based on CCITLs is designed, simulated and measured to verify the proposed technique. It is found that the properly designed RRT prototype based on CCITLs can provide shorter electrical and physical lengths than those of the conventional RRT prototype indeed.

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Section: Rrts Implemented Using Ccitlsmentioning

confidence: 99%

Section: Rrts Implemented Using Ccitlsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of Reactance-to-Reactance Impedance Transformers Based on Conjugately Characteristic-Impedance Transmission Lines (CCITLs) and Meta-Smith Charts (MSCs)

Satitchantrakul¹,

Torrungrueng²

2021

RADIOENGINEERING

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“…Вказано, що його хвильовий опір повинен дорівнювати модулю опору навантаження. Розрахунок значення активного трансформованого опору за формулою (10) дає завжди додатне значення вхідного опору, величина якого зростає зі збільшенням реактивного опору навантаження. Достовірність отриманих формул підтверджена збіжністю за одиницями вимірювання та графіками залежностей зміни зовнішнього радіуса коаксіальної лінії живлення b (її хвильового опору), а також товщини та місця включення узгоджувального діелектричного трансформатора 1 l .…”

Section: H ) для досягнення мети використовувалися методи теорій антен й електродинаміки зокрема теорія довгих ліній розроблено математичunclassified

Irradiator With Minimal Losses of Parabolic Antenna for Radio Monitoring Systems of Information Channels of Radio Relay Communication Lines

Karaschuk

Tsikalov

Savenko

2021

Проблеми Створення, Випробування, Застосування Та Експлуатації Складних Інформаційних Систем

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Analysis of the experience of modern struggle shows that the success of combat missions to sone extent depends on the timely detection of information from communication channels, in particular, radio relay communication lines. Increasing the detection range of the radio monitoring station can be achieved by using a mirror parabolic antenna with a radiation in the form of a conical horn with low losses due to the use of a matching device. The constructive decisions of matching devices are analysed and it is determined that most of them are resonant. The substantiation and selection of the design of the dielectric transformer with the length ( – wavelength in a round waveguide, m) for coordination of the conical horn irradiator in the whole band of its operating frequencies for the wave type is carried out. To achieve the goal, the methods of antenna theories and electrodynamics were used, in particular the theory of long lines. A mathematical apparatus has been developed for calculating the parameters of a dielectric transformer (the length ). It is stated that its impedance must be equal to the modulus of load resistance. The calculation of the value of the active transformed resistance according to the formula (10) always gives a positive value of the input resistance, the value of which is greater the greater the reactive load reactance. The reliability of the obtained formulas is confirmed by the convergence of units and graphs of dependences of the changes of the outer radius of the coaxial power line (its impedance), as well as the thickness and place of inclusion on the matching dielectric transformer . The practical significance of the research results lies in the possibility of improving the matching of a horn antenna based on a circular waveguide in the range of its operating frequencies for a certain type of wave.

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Design of Reactance-to-Reactance Transformers in Single Stub Tuning

Satitchantrakul

Torrungrueng

2021

2021 9th International Electrical Engineering Congress (iEECON)

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Compact wideband multi-section quarter-wave-like transformers

Cited by 7 publications

References 19 publications

Design of Reactance-to-Reactance Impedance Transformers Based on Conjugately Characteristic-Impedance Transmission Lines (CCITLs) and Meta-Smith Charts (MSCs)

Design of Reactance-to-Reactance Impedance Transformers Based on Conjugately Characteristic-Impedance Transmission Lines (CCITLs) and Meta-Smith Charts (MSCs)

Irradiator With Minimal Losses of Parabolic Antenna for Radio Monitoring Systems of Information Channels of Radio Relay Communication Lines

Design of Reactance-to-Reactance Transformers in Single Stub Tuning

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