Compact slot resonator-based photonic bandgap for coplanar waveguide and its application to bandstop filter

Abstract

One-dimensional slot resonator-based photonic bandgap for coplanar waveguide (SR-PBG-CPW) is proposed in this paper. The SR-PBG-CPW unit is realized by replacing the conventional rectangular holes on ground plane with a slot resonator. The proposed SR-PBG-CPW unit exhibits more excellent bandgap and slow-wave characteristics and better selectivity at cutoff frequency than the conventional PBG-CPW unit. Furthermore, the SR-PBG-CPW is applied effectively to design a bandstop filter. Comparison between simulations and measurement confirms the validity of the proposed filter configuration and design procedure. Figure 7 Comparison of the simulated and measured transmission characteristics for the CPW bandstop filters shown in Fig. 6: (a) conventional; (b) slot resonator ABSTRACT: A new method based on the adaptive neuro-fuzzy inference system (ANFIS) is presented to calculate accurately the patch radius of circular microstrip antennas (MSAs). ANFIS combines the benefits of artificial neural networks (ANNs) and fuzzy inference systems (FISs) in a single model. A hybrid learning algorithm based on the least-squares method (LSM) and the backpropagation algorithm is usedto identify the parameters of ANFIS. The results of ANFIS are in very good agreement with the experimental results reported elsewhere.

A novel X‐band broadband bandstop filter with sharp cut‐off frequency using EBG dual‐ear structures

“…Electromagnetic bandgaps (EBGs) or electromagnetic crystals have been used in the microwave and millimeter‐wave community owing to their filtering properties or inhibition of signal propagation in certain directions. EBG structures can be patterned on metal layers, such as the ground plane or the signal line of the microstrip [1] as well as of the coplanar waveguide (CPW) transmission line [2]. Comparing with microstrip lines, the CPW structures are more attractive because of the ease of characterization and fabrication, not forgetting promising applications in the devices of microwave integrated circuits (MICs), monolithic microwave integrated circuits (MMICs), and micro‐electromechanical systems (MEMS) [3].…”

A compact CPW resonator cell with dual-bandgap characteristics

“…Recently, CPW incorporated with DGS is receiving much attention [8][9][10][11][12][13]. Similar to the case of microstrip line, some perforations were etched on the ground planes of the CPW.…”

“…The radiation effect and transmission loss are considered by including the resistors, R 1 and R 2 . The circuit parameters can be extracted using the following equations[11]:…”