Fig 1.
Design flow chart.
Fig 2.
Topology of the Coupling Paths. (a) traditional ML-CPW. (b) SVA-ML-CPW.
Fig 3.
Simplified equivalent circuit diagram of SVA-ML-CPW. (a) Odd mode. (b) Even mode.
Fig 4.
Simplified equivalent circuit diagram of SVA-ML-CPW. (a) Odd mode. (b) Even mode.
Fig 5.
Simplified Equivalent Circuit Diagram of ML-CPW Signal Path.
Fig 6.
Simulation model of SVA-ML-CPW. (a)Top view. (b)Bottom view.
Fig 7.
Effect of control parameters on passband mode. (a)Number of via hole elements. (b)Total length of coupled microstrip line LMall.
Fig 8.
Effect of control parameters on passband mode. (a) Microstrip coupling distance m. (b) Width of the second CPW section W1.
Fig 9.
Impact of slotline width variation G2 on the first notch band.
Fig 10.
Filter passband and transmission zero points.
Fig 11.
Topology of the dual narrowband notch paperclip structure.
Fig 12.
Dual narrowband notch paperclip structure: Branch B and Branch C.
Fig 13.
Effect of branch width and self-couple distance on notch center frequencies f B and f C.
Fig 14.
Impact of branch width and self-couple distance on the notch band.
Fig 15.
Electric field distribution and the effect of total branch length on notch center frequencies f B and f C.
Fig 16.
Second-Order Harmonics f B′ and f C′ of f B and f C.
Fig 17.
The appearance and disappearance of f B′.
Fig 18.
The open-loop resonator.
Fig 19.
Impact of coupling distances S1 and S2 on the notch center frequency and suppression depth of the open-loop resonator.
Fig 20.
Effect of varying coupling distances S1 and S2 on the wide stopband phenomenon.
Fig 21.
The inverted S-shaped EBG.
Fig 22.
Effect of three control parameters of the inverted S-shaped EBG. (a) LS2. (b) WS1. (c) LS1.
Fig 23.
Series complementary resonant rings. (a) Mounting Effect. (b) Embedded Position.
Fig 24.
Current Distribution of the Prototype Filter at 2.4 GHz.
Fig 25.
Electric Field Spectrum of the Proposed Filter at the Center Frequencies of the Six Passbands, a) 3.08 GHz, (b) 4.65 GHz, (c) 5.98 GHz, (d) 8.77 GHz, (e) 11.88 GHz, (f) 13.74 GHz.
Fig 26.
Electric Field Spectrum of the Proposed Filter at the Center Frequencies of the Five Notch Bands, (a) 3.96 GHz, (b) 5.45 GHz, (c) 6.86 GHz, (d) 11.28 GHz, (e) 12.68 GHz.
Fig 27.
Group delay.
Fig 28.
Series complementary resonant rings. (a) Mounting Effect. (b) Embedded Position.
Table 1.
Comparison of the parameters of this filter and reference filter.