Analog reflection topology building blocks for adaptive microwave signal processing applications

Lucyszyn, S.; Robertson, I.D.

doi:10.1109/22.372106

Cited by 127 publications

(86 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of NGD is observed within a limited frequency band when the absorption or attenuation is at a maximum. Therefore, conventional approaches to realize the NGD circuits are based on bandstop structures using either series or shunt RLC resonators [4][5][6][7][8][9][10][11]. The NGD circuits have been used in various practical applications in communication systems, such as shortening or reducing delay lines [11], enhancing the efficiency of feedforward linear amplifiers [12,13], designing broadband and constant phase shifters [14], realization of non-Foster reactive elements [15], and minimizing beam-squint in series-fed antenna arrays [16].…”

Section: Introductionmentioning

confidence: 99%

Negative Group Delay Phenomenon Analysis Using Finite Unloaded Quality Factor Resonators

Chaudhary¹,

Jeong²

2016

PIER

View full text Add to dashboard Cite

Abstract-This paper presents a comprehensive method to analyze negative group delay (NGD) phenomenon at microwave frequency. This method is based on a coupling matrix with finite unloaded quality factor resonators. Unlike conventional NGD circuit topologies that use a lumped resistor R along with bandstop resonators, the proposed topology does not require any R for generating NGD and therefore, provides fully distributed circuit realization. The proposed topology has both source to load and inter-resonator coupling structures. Analytical design equations are provided to obtain predefined NGD with matched input/output ports; the proposed structure therefore does not require any extra matching networks. From analytical analysis, it is also found that the NGD bandwidth as well as magnitude flatness can be controlled by inter-resonator couplings. The proposed design theory is proven through fabrications of NGD circuit at a center frequency of 2.14 GHz. The measurement results are in good agreement with simulations and predicted theoretical results.

show abstract

Section: Introductionmentioning

confidence: 99%

Negative Group Delay Phenomenon Analysis Using Finite Unloaded Quality Factor Resonators

Chaudhary¹,

Jeong²

2016

PIER

View full text Add to dashboard Cite

show abstract

“…To reduce such perturbations, Lucyszyn et al [3], [4] have put forward an original negative group delay synthesizer. This narrow band Microwave Integrated Circuit synthesizer, built with varactors, field effect transistors (FET) and lumped components, operates in reflection and needs a coupler to pass into transmission.…”

mentioning

confidence: 99%

Active Microwave Circuit With Negative Group Delay

Ravelo

Pérennec

Roy

et al. 2007

IEEE Microw. Wireless Compon. Lett.

View full text Add to dashboard Cite

Abstract-In this letter, we report on the design, simulation and implementation of an active negative group delay circuit that operates at 1 GHz with a group delay and a gain, respectively, around 2 ns and 2 dB. Analytical formulas are proposed to demonstrate that the adopted topology is able to simultaneously achieve negative group delay (NGD) and gain while fulfilling active device constraints. The theoretical and simulated results are both validated by frequency measurements of a two-stage active microwave circuit.Index Terms-Active devices, negative group delay (NGD).

show abstract

“…Section 2 reports the architecture of the proposed beamforming SOC in details to illustrate how to reduce the group delay variation in the receiving path of the proposed architecture. All the TL elements in the passive attenuators and phase shifter [8] are realized by the on-chip synthetic transmission lines [9,10]. The cascode amplifier with dual-feedback loops, as the first stage in each receiving path, provides 20 dB amplifier gain to compensate all the insertion losses of the passive attenuator, phase shifter, and the power combiner.…”

Section: Introductionmentioning

confidence: 99%

K-band 100.8 mW beamforming SOC with 249.8 ± 22.8 pico-second group-delay in 0.13 µm CMOS

Zhang

Tzuang

2017

IEICE Electron. Express

View full text Add to dashboard Cite

A K-band four-element beamforming system-on-chip (SOC) is presented. In the SOC, the attenuators and the phase shifters, designed in the reflection topology, are realized by two types of the on-chip synthetic transmission lines. The cascode amplifier, as the first stage in the receiving path, provides a gain of 20 dB to compensate all the losses of the passive components, and use dual feedback loops to minimize the group delay variation. The SOC prototype is fabricated by using 0.13 µm CMOS technology, and characterized through the on-wafer measurements. The measured input and output return loss are less than −9.8 and −14.8 dB in the 50 Ω system. The total receiving gain and the noise figure are 5.9 dB and 7.5 dB, respectively. The prototype can continuously make 360°phase shifting with root-mean-square (RMS) errors less than 1.5°and 0.6 dB. The measured group-delay is 249.8 pico-second (ps) with a variation of ²22.8 ps from 22 to 26 GHz. The input P 1dB and IIP3 are −19.8 dBm and −8.3 dBm at 24 GHz. The channel-to-channel isolation is higher than 31.6 dB in a chip area of 0.00632 λ 0 2 at 24 GHz.

show abstract

Analog reflection topology building blocks for adaptive microwave signal processing applications

Cited by 127 publications

References 10 publications

Negative Group Delay Phenomenon Analysis Using Finite Unloaded Quality Factor Resonators

Negative Group Delay Phenomenon Analysis Using Finite Unloaded Quality Factor Resonators

Active Microwave Circuit With Negative Group Delay

K-band 100.8 mW beamforming SOC with 249.8 ± 22.8 pico-second group-delay in 0.13 µm CMOS

Contact Info

Product

Resources

About