A Compact UWB Band-Notched Printed Monopole Antenna With Defected Ground Structure

Ultra-Wideband Antenna and Design

“…A transmission line with a bandstop characteristic to feed the UWB antenna can be considered as an integration design of the printed UWB antenna and the filter, which may have little affection to the antenna radiation. Several designs of microstrip feedline with the notched-band function are proposed, as shown in Fig.29 i.e., Zhang et al [79] proposed a Ushaped slot embedded in a microstrip feedline, and a band-notched characteristic was realized. Later, Nouri et al [80] used the defect ground technique to realize the microstrip filter, where a vertical metal strip connected to the rectangular ring is embedded in the shovel-shaped slot that is located under the feedline at the center of ground plane.…”

“…By adjusting the length of two open circuited stubs approximately to one quarter of wavelength, a destructive interference of the current distribution takes place causing the antenna non-radiating at that notched frequency. Various bandstop transmission lines [79][80][81][82] .…”

Reconfigurable Band-Notched Slot Antenna Using Short Circuited Quarter Wavelength Microstrip Resonators

“…The UWB antennas with the rejection of single band [4][5][6], dual bands [7][8][9], multiband [10], and reconfigurable bands [11] have been presented and investigated [4][5][6][7][8][9][10][11]. Some of the recently used approaches include using electromagnetic band-gap (EBG) structure [12,13], defected ground structure (DGS) [14], etching different slots on the patch or the ground [15,16], employing a band-reject filter into the feed line of the antenna [17], Varactor diodes [18], optical switches [19], PIN diodes [20], and rotational motion using a stepper motor [21]. Slots in the radiator have been widely implemented to obtain tunable notched-bands.…”

Microstrip-fed Triangular UWB Microstrip Antenna Based on DGS

“…Therefore the printed forms of that designs can be successfully exploited for ultra-wideband systems. Over the past years, several monopole antenna structures, such as rectangular [10], circular [11], elliptical [12], conical [13], tapered [14,15], slot-loaded [16][17][18] and defected ground [19][20][21][22] configurations, have been suggested for ultrawideband applications. The popularity of defected ground structure (DGS) in antenna study has increased immensely [19][20][21][22].…”