Realisation of microwave brune sections

Rhodes, John David; Scanlan, J.O.; Levy, R.

doi:10.1049/el:19650242

Cited by 9 publications

(11 citation statements)

References 1 publication

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“…One of the seminal contributions presented at this meeting was a paper by Sean O. Scanlan and David Rhodes on the cascade synthesis of distributed circuits [29]. They applied Dante Youla's theory of cascade synthesis [30], and opened an important new trend in microwave circuit design [30][31][32][33][34][35][36][37]. Synthesis of transmission line networks has not only become an important tool in microwave communication and radar engineering but later also played a crucial role in mobile telephony [38].…”

Section: Synthesis Of Passive N -Ports As a Model For Designmentioning

confidence: 99%

On circuit models for quantum‐classical networks

Csurgay

2007

Circuit Theory & Apps

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SUMMARYPhysics is not scale invariant, and today the scale of atoms and molecules challenges designers of machines in which quantum effects have dominant sway. What role could circuit theory play in designing machines described by quantum-classical models? Classical equivalent circuits do exist for systems composed of metal contacted and wired devices, such as resonant tunneling diodes, single electron transistors, metalinsulator-metal diodes, etc. circuits, but not for quantum-entangled networks, such as multi-quantum-state atoms.If devices were not contacted and wired by macroscopic metals, i.e. devices were classically field coupled, then generalized circuit models can be introduced. Case studies have been presented on the role of circuit models in quantum-classical systems. However, there are no ideal circuit elements capable of capturing the port properties of quantum-mechanical and/or quantum-optical subsystems and their coupling to classical waveguides or cavities.

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Section: Synthesis Of Passive N -Ports As a Model For Designmentioning

confidence: 99%

On circuit models for quantum‐classical networks

Csurgay

2007

Circuit Theory & Apps

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“…One configuration is the dual of the other, so we will limit our consideration to the former. For the realization of the realfrequency transmission zeros, this configuration is termed as Brune section lowpass prototype filter since it is the cascaded connection of Brune sections, a T-network with a shunt arm of a series LC resonator sandwiched between two inductances [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…In this situation, the Brune section is realized with the aid of the mutual coupled inductances, and its microwave realization involves coupled transmission line [10]. Although many efforts have been made to improve its realization structures [12], the appearances of coupled inductances are always troublesome in the RF filter design for the reason of its complex configuration. There are some criteria, which is said the Fujisawa's conditions, to determine whether occurring the negative elements, and some principles for guidance to eliminate the negative elements [4].…”

Section: Introductionmentioning

confidence: 99%

Three element resonator lowpass filter

Wang

Chen

2023

IET Microwaves Antenna & Prop

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The conventional lowpass prototype filter with the finite transmission zeros close‐to‐band edge often yields negative circuit elements that lead to a practical difficulty of physical realizations. This paper presents an alternative topology of the lowpass prototype filter named three element resonator lowpass filter, which is composed of series inductances and shunt three element resonators. For one‐section three element resonator lowpass filter, the closed‐form solutions of the non‐negative circuit elements are deduced based on its characteristic function recovered from a prescribed transmission zero. For multi‐section one, the associated numerical synthesis procedure using gradient‐based optimization is presented. In physical realization, a much more practical configuration of three element resonator is proven by the equivalent circuit transformation. A synthesis example of lowpass prototype filter with 12 pairs of transmission zeros illustrates the effectiveness of the numerical synthesis method. Also, a design example of five‐section three element resonator lowpass filter, which has a passband up to 1775 MHz, is implemented by the distributed elements based on its prototype circuit of the numerical synthesis. The measured results of the fabricated lowpass filter experimentally validate the prototype filter.

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“…From the practical implementation point of view however, such mutual inductances are hard to implement at high frequencies 6,7 . Therefore, for practical design, ladder network topologies without mutual inductances are in general most preferred way for the synthesis of Brune sections.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, determination of the conditions on the design parameters, which will ensure mutual inductance free realizations was a major issue in the literature. As far as ladder filters are considered, important progress toward this goal has been achieved and several synthesis techniques are already presented in the literature 5,6 . However the synthesis issue has not been completely resolved in literature especially for matching networks.…”

Section: Introductionmentioning

confidence: 99%

Design of multiband matching ladders without mutual coupling using parametric representation of Brune functions

Yildiz

Aksen

Yarman

2020

Int J RF Microw Comput Aided Eng

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In this study, a semianalytical method for the design of mutual coupling free multiband matching networks is introduced. A new parametric representation of Brune functions is used for the construction of multiband ladder network topologies without mutual induction. The method involves the use of Fujisawa's constraints for low pass ladders having finite transmission zeros, in a parametric representation of driving point impedance function resulting in mutual inductance free Brune sections. The developed parametric representation is incorporated with Real Frequency Techniques to design matching networks with a plurality of pass bands. Several illustrative design examples are presented to validate the method.

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Realisation of microwave brune sections

Cited by 9 publications

References 1 publication

On circuit models for quantum‐classical networks

On circuit models for quantum‐classical networks

Three element resonator lowpass filter

Design of multiband matching ladders without mutual coupling using parametric representation of Brune functions

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