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Progress In Electromagnetics Research C
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A MINIATURIZED SELF-MATCHED NEGATIVE GROUP DELAY MICROWAVE CIRCUIT

By T. Shao, Z. Wang, S.-J. Fang, H. Liu, and S. Fu

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Abstract:
A miniaturized self-matched negative group delay (NGD) microwave circuit without the need for external matching networks is proposed. The NGD circuit is based on a modified parallel-type RLC resonator, in which lumped elements (capacitors and inductors) are implemented by microstrip gaps and high-impedance and short-circuited microstrip lines. To verify the design concept, an NGD circuit with the size of 0.21λg×0.29λg is designed and fabricated. From the measurement results, the NGD time of -5.9 ns at the center frequency of 1.532 GHz is obtained with insertion loss of less than 12.5 dB, return losses of more than 25 dB and the NGD bandwidth of 45 MHz.

Citation:
T. Shao, Z. Wang, S.-J. Fang, H. Liu, and S. Fu, "A miniaturized self-matched negative group delay microwave circuit," Progress In Electromagnetics Research C, Vol. 79, 149-157, 2017.
doi:10.2528/PIERC17083001

References:


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