Microwave All-Pass Networks

Scanlan, J.O.; Rhodes, John David

doi:10.21236/ad0659153

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…The conventional group delay equalizers typically have a 3‐dB coupler and an equalizer circuit at each output port in Figure . In this article, we propose new equalizer circuits composed of LC resonance circuits, instead of all pass type networks of the conventional structure . The proposed equalizer is designed by applying the 4 new resonator structures from first resonator to fourth resonator, shown in Figure .…”

Section: Design Of Group Delay Equalizermentioning

confidence: 99%

“…Conventional group delay equalizers have been suggested in terms of the realization of C‐type (all pass first order) or D‐type (all pass second order) network cascaded with circulators or 3‐dB hybrids. Graphical methods have been used to determine proper poles for narrow band equalization. To increase the equalized bandwidth in this scheme, several sections of C‐ or D‐type equalizers are required in a cascaded form.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, once the pole and zero are determined, the synthesis process for the equalizer design is performed. Even though various equalization methods have been suggested, we would like to introduce new type of equalizer circuit in addition to conventional method.…”

Section: Introductionmentioning

confidence: 99%

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A design of group delay equalizer using series and parallel resonator

Jang

Lee

Koo

et al. 2018

Micro & Optical Tech Letters

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A novel method of designing a group delay equalizer consisting of a typical 3‐dB hybrid coupler combined with one of newly proposed 4 types of resonator is presented. It is designed by applying the phase obtained from the reflection coefficient between the 3‐dB coupler and the proposed resonator to the group delay formula. Once the resonance frequency with the group delay as the peak is set to form a desired band by setting the parallel and series resonance frequencies, each component value of the proposed equalizer is obtained. In order to improve the group delay bandwidth, the proposed equalizers with different target frequencies are connected as cascaded. One of the proposed 4 types of equalizers was implemented using open and short stubs due to the fabrication limitation of lumped components, and its measurement results showed that the insertion loss is under −1 dB, and the group delay is 4.5 ns with ±1.5 fabrication error. This implies that the measurement results were well matched with the design method of the proposed equalizer.

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Section: Design Of Group Delay Equalizermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A design of group delay equalizer using series and parallel resonator

Jang

Lee

Koo

et al. 2018

Micro & Optical Tech Letters

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“…Arbitrarily prescribed GD responses can also be implemented using GD equalizers . In References 10 and 11, Scanlan and Rhodes presented the design procedure for the first‐ and second‐order GD equalizers based on reflection type all‐pass networks. First order is called C‐section and the D‐section is the second order all‐pass filter.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of group delay equalizers for satellite communications

Shafeghati

Ahmadi

Torabi

2020

Int J RF Microw Comput Aided Eng

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This article presents a comparative study of four different group delay (GD) equalizers with a narrow band filter used as input multiplexer for a Ku-band satellite transponder. A dual mode cylindrical filter with 36 MHz bandwidth is designed and fabricated. The filter GD is measured and two types of group-delay equalizers are designed to fulfill the requirements of the transponder's GD mask.Two rectangular and two cylindrical equalizers are designed and their performance parameters, such as insertion loss and equalized bandwidth, are compared. In addition, a comparison between the designed first order (C-section) and second order (D-section) GD equalizers is done.dual mode filter, equalizer, group delay, Ku band, satellite communication

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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: Introductionmentioning

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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Microwave All-Pass Networks

Cited by 5 publications

References 2 publications

A design of group delay equalizer using series and parallel resonator

A design of group delay equalizer using series and parallel resonator

A comparative study of group delay equalizers for satellite communications

On circuit models for quantum‐classical networks

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