International Journal of Antennas and Propagation / 2019 / Article / Tab 2

Research Article

Novel Gysel Power Dividers with Negative Group Delay Characteristics

Table 2

Performance comparison.

Ref.f0 (GHz)NGD (ns)NGD bandwidth (MHz)IL (dB)IL bandwidth (MHz)RL (dB)Isolation (dB)FOM (10−3)Size ( × )

[9]1.00−1.10250#22.717325.023.03.430.55 × 0.04
[10]2.14−0.5315024.425020.642.20.560.50 × 0.50
[11]2.14−0.4845018.130019.938.93.560.62 × 0.34
[12]2.14−0.48540+15.041037.034.98.880.61 × 0.76
[13]2.14−1.161009.2915026.842.22.790.55 × 0.58
[14]2.14−0.56556.9710017.515.80.620.94 × 0.48
[15]2.14−0.2031014.055032.51.23.180.65 × 0.34
This work1.00−1.9731.38.2915538.341.23.680.40 × 0.39

Only one output port having NGD characteristics. #Results for two-section directional couplers. +Results for the example A in [12].