An improvement of defected ground structure lowpass/bandpass filters using H-slot resonators and coupling matrix method

Abstract

Abstract-In order to overcome these disadvantages, a method has been proposed in [6,7], which uses both DGS resonators and a compensated microstrip line to design the desired LPF.

Synthesis of the compact low pass filter using dumbbell-shaped slot resonators

“…Такий тип фільтра має чітко відокремлену смугу пропускання в характеристиці коефіцієнту передачі, а також широку смугу запирання. Це забезпечує відсічення небажаних частот гармонік [1,2,4] і зменшення фізичного розміру [1,5] у порівнянні з традиційними фільтрами.…”

Application of Defected Ground Structure to Suppress Out-of-Band Harmonics for WLAN Microstrip Antenna

“…To suppress higher harmonics, various techniques like PBG (photonic band gap structure) [7][8][9][10], Filter, and EBG (electromagnetic band gap structure) [11,12] have been proposed. The conducting metal etched off in specific shape from the ground plane provides wide rejection band covering some frequency range [13][14][15][16][17]. The structure of this type is known as defected ground structure (DGS).…”

Parametric studies on effects of defected ground structure (DGS) for 6 GHz bandpass filter

“…Then, the good quality of service (QoS) provide with no error of transmission of data as well so that no problem occurred to the service. [1] The microwave application such as filter is chosen to achieve the frequency selectivity in the various wireless systems operating. Bandpass Filter acts as the backbone components that provide overall performance of various communication systems.…”