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In this paper, compact size band pass filters are proposed and designed for WLAN applications. The coupled DGS resonators are considered the main block of proposed band pass filters. The three proposed filters are designed by using the same defected ground structure shape, but with different feed line configurations. The feed line configuration affects the presence of transmission zeros in the rejection...
A novel compact defected ground structure (DGS) lowpass filter (LPF) and tunable bandpass filter (BPF) are proposed in this paper. The designed filter consists of one TDGS resonator, which is excited by 50 ohm microstrip line, placed on top layer between the input and output this structure. The addition of compensated patch capacitor improves the low insertion loss and ultra-wide stopband with 15...
Compact lowpass filter (LPF) and bandpass filter (BPF) are introduced in this paper. The proposed LPF presents small size, low insertion loss and ultra-wide stopband with 20 dB attenuation from 6 GHz to more than 20 GHz. The length of the proposed multilayer LPF is reduced to 0.143 λg @ 3 GHz in comparison with 0.2 λg for the cascaded topology with λg = 0.157 m. The proposed BPF is utilizing a simple...
In this paper, we present a small size third order band pass coupled resonator filter. The filter consists of defected ground structure resonators (DGSs). The reduction of the size is achieved by loading the resonator with lumped capacitor. The insertion of lumped capacitor within resonator increases the effective capacitance and reduces the resonant frequency, so the dimensions of the filter will...
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