Negative Group Delay Phenomenon Analysis Using Finite Unloaded Quality Factor Resonators

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.

[1]  Stepan Lucyszyn,et al.  Negative group delay synthesiser , 1993 .

[2]  B. Ravelo,et al.  Active Microwave Circuit With Negative Group Delay , 2007, IEEE Microwave and Wireless Components Letters.

[3]  Yongchae Jeong,et al.  Transmission-Line Negative Group Delay Networks With Improved Signal Attenuation , 2014, IEEE Antennas and Wireless Propagation Letters.

[4]  Yongchae Jeong,et al.  A design of compact wideband negative group delay network using cross coupling , 2014 .

[5]  C. M. Hymel,et al.  Temporally advanced signal detection: A review of the technology and potential applications , 2011, IEEE Circuits and Systems Magazine.

[6]  Yongchae Jeong,et al.  Distributed Transmission Line Negative Group Delay Circuit With Improved Signal Attenuation , 2014, IEEE Microwave and Wireless Components Letters.

[7]  Greg E. Bridges,et al.  LIMITS OF NEGATIVE GROUP DELAY PHENOMENON IN LINEAR CAUSAL MEDIA , 2011 .

[8]  D. Peroulis,et al.  New Bandstop Filter Circuit Topology and Its Application to Design of a Bandstop-to-Bandpass Switchable Filter , 2013, IEEE Transactions on Microwave Theory and Techniques.

[9]  Heungjae Choi,et al.  Bandwidth enhancement of an analog feedback amplifier by employing a negative group delay circuit , 2010 .

[10]  Yongchae Jeong,et al.  Microstrip Line Negative Group Delay Filters for Microwave Circuits , 2014, IEEE Transactions on Microwave Theory and Techniques.

[11]  Chul-Dong Kim,et al.  Experimental verification for time advancement of negative group delay in RF electronic circuits , 2010 .

[12]  Yongchae Jeong,et al.  A design of composite negative group delay circuit with lower signal attenuation for performance improvement of power amplifier linearization techniques , 2011, 2011 IEEE MTT-S International Microwave Symposium.

[13]  Blaise Ravelo,et al.  Application of negative group delay active circuits to the design of broadband and constant phase shifters , 2008 .

[14]  Yongchae Jeong,et al.  Low Signal-Attenuation Negative Group-Delay Network Topologies Using Coupled Lines , 2014, IEEE Transactions on Microwave Theory and Techniques.

[15]  Nicholas Chako,et al.  Wave propagation and group velocity , 1960 .

[16]  M. Nakayama,et al.  Negative Group Delay Circuit for Feed-Forward Amplifier , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[17]  Hassan Mirzaei,et al.  Realizing Non-Foster Reactive Elements Using Negative-Group-Delay Networks , 2013, IEEE Transactions on Microwave Theory and Techniques.

[18]  Yongchae Jeong,et al.  Synthesis of reflection type negative group delay circuit using transmission line resonator , 2009, 2009 European Microwave Conference (EuMC).

[19]  Tatsuo Itoh,et al.  Maximally Flat Negative Group-Delay Circuit: A Microwave Transversal Filter Approach , 2014, IEEE Transactions on Microwave Theory and Techniques.

[20]  Jeremy Everard,et al.  Broadband negative group delay networks for compensation of microwave oscillators and filters , 2000 .

[21]  Yongchae Jeong,et al.  Synthesis of negative group delay time circuit , 2008, 2008 Asia-Pacific Microwave Conference.

[22]  G. Bridges,et al.  Bilateral Gain-Compensated Negative Group Delay Circuit , 2011, IEEE Microwave and Wireless Components Letters.

[23]  Greg E. Bridges,et al.  Asymptotic Limits of Negative Group Delay in Active Resonator-Based Distributed Circuits , 2011, IEEE Transactions on Circuits and Systems I: Regular Papers.

[24]  Stepan Lucyszyn,et al.  Analog reflection topology building blocks for adaptive microwave signal processing applications , 1995 .

[25]  D. Peroulis,et al.  Switchless Tunable Bandstop-to-All-Pass Reconfigurable Filter , 2012, IEEE Transactions on Microwave Theory and Techniques.

[26]  Hassan Mirzaei,et al.  Arbitrary-Angle Squint-Free Beamforming in Series-Fed Antenna Arrays Using Non-Foster Elements Synthesized by Negative-Group-Delay Networks , 2015, IEEE Transactions on Antennas and Propagation.

[27]  Yongchae Jeong,et al.  Efficiency Enhancement of Feedforward Amplifiers by Employing a Negative Group-Delay Circuit , 2010, IEEE Transactions on Microwave Theory and Techniques.