Compact U-shaped dual planar EBG microstrip low-pass filter

In this paper, a novel high-performance compact dual planar electromagnetic bandgap (DP-EBG) microstrip low-pass filter with a U-shaped geometry is proposed. By employing the unique DP-EBG configuration and the U-shaped geometry of the microstrip line (MLIN), the proposed structure achieves a wide stopband with high attenuation and a high selectivity within a small circuit area. Its passband ripple level is low due to the U-shaped geometry and the electromagnetic bandgap (EBG) structure with square patches inserted at the bends of the MLIN. The Chebyshev tapering technique is used to taper components of the proposed structure in order to eliminate ripples caused by the EBG periodicity. The structure was fabricated and the measured results are in good agreement with the simulated results. This novel design demonstrates superior low-pass filtering functionality and can easily be applied to monolithic circuits.

[1]  Txema Lopetegi,et al.  Compact photonic bandgap microstrip structures , 1999 .

[2]  Yee Hui Lee,et al.  A tapered small‐size EBG microstrip bandstop filter design with triple EBG structures , 2005 .

[3]  Txema Lopetegi,et al.  High performance double-sided microstrip PBG filter , 2002 .

[4]  John,et al.  Strong localization of photons in certain disordered dielectric superlattices. , 1987, Physical review letters.

[5]  T. Itoh,et al.  A novel uniplanar compact PBG structure for filter and mixer applications , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[6]  Mario Sorolla,et al.  Enhanced patch-antenna performance by suppressing surface waves using photonic-bandgap substrates , 1999 .

[7]  Txema Lopetegi,et al.  Optimization of compact photonic bandgap microstrip structures , 2000 .

[8]  E. Yablonovitch,et al.  Inhibited spontaneous emission in solid-state physics and electronics. , 1987, Physical review letters.

[9]  Txema Lopetegi,et al.  1‐D and 2‐D photonic bandgap microstrip structures , 1999 .

[10]  Tatsuo Itoh,et al.  Novel 2-D photonic bandgap structure for microstrip lines , 1998 .

[11]  Tatsuo Itoh,et al.  Broad-band power amplifier using dielectric photonic bandgap structure , 1998 .

[12]  Yee Hui Lee,et al.  Tapered dual-plane compact electromagnetic bandgap microstrip filter structures , 2005 .

[13]  Francesco Prudenzano,et al.  Tapered photonic bandgap microstrip lowpass filters: design and realisation , 2003 .

[14]  Tatsuo Itoh,et al.  A uniplanar compact photonic-bandgap (UC-PBG) structure and its applications for microwave circuit , 1999 .

[15]  Nemai Chandra Karmakar,et al.  Investigations into nonuniform photonic-bandgap microstripline low-pass filters , 2003 .

[16]  Eli Yablonovitch,et al.  Radiation properties of a planar antenna on a photonic-crystal substrate , 1993 .