DOI: 10.1109/TMTT.2025.3542251   IEEEXplore: https://ieeexplore.ieee.org/document/10907267

RF-input-quasi-reflectionless filtering dispersive-delay structures based on complementary-diplexer architectures utilized for 5th and 7th order bandpass filter synthesis.

2 GHz prototype demonstration.

A two-step design process of 1) separate polynomial/coupling-matrix synthesis of the main and auxiliary channels for the desired bandpass filtering dispersive delay structures (DDS) specifications in transmission and the complementary band- stop filtering functionality, respectively, and 2) coupling-matrix optimization of the overall RF-input-quasi-absorptive bandpass filtering DDS.

RF applications such as beyond-5G wireless communications and Internet-of-Everything (IoE) wireless sensor networks that require dynamically reconfigurable transceivers.

1.985-GHz center frequency, 3-dB bandwidth of 317 MHz (15.97%), >2.32 dB in-band insertion loss, >12.6 dB in-band power matching levels, 4.3 ns maximum group delay (three-step), 1.36 BW3 dB x ∆τmaxg (3 dB BW x group delay variation); 1.33 to 2.99 GHz quasi-reflectionless range, >7.85 dB power matching level.