Reconfigurable ultra‐wideband monopole antenna with single‐, dual‐, and triple‐band notched functions

Abstract

A miniaturized ultra‐wideband (UWB) monopole antenna with reconfigurable multiple‐band notched performance is demonstrated. By modifying the shape of the patch and the ground plane, the UWB operation is achieved. The first and second band‐notches are respectively generated by etching a rectangular slot with open ends and a U‐shaped slot in the patch, and the third band‐notch is produced by loading a C‐shaped parasitic element beneath the patch. To realize the reconfigurable band‐notched functions, four PIN diodes are inserted in three band‐rejected structures. The antenna has a compact dimension of 30 mm × 26 mm. It can switch between a UWB state and several band‐notch states by alternating the states of the diodes. Also, good radiation patterns are obtained.

A planar CPW fed UWB antenna with dual rectangular notch band characteristics incorporating U‐slot, SRRs , and EBGs

“…Multiple design techniques have been provided in the literature for achieving band‐notch characteristics in the UWB antennas, that is, slot and parasiticelementloading, 10,11 using fractals, 12 embedding split‐ring resonators (SRRs) and electromagnetic bandgap (EBG) structures 1,3,13‐17 . Further, Varactor diodes, PIN diodes, variable capacitors, optically controlled switch, magnetodielectric materials and micro‐electro‐mechanical systems (MEMS) have been also used to achieve reconfigurable operation in UWB antennas with band‐notch characteristics 3,18‐23 …”

“…1,3,[13][14][15][16][17] Further, Varactor diodes, PIN diodes, variable capacitors, optically controlled switch, magnetodielectric materials and microelectro-mechanical systems (MEMS) have been also used to achieve reconfigurable operation in UWB antennas with band-notch characteristics. 3,[18][19][20][21][22][23] The aforementioned designs have a common drawback that has not been assessed meticulously, that is, all these designs have a spiculate curve for notch band…”

A miniaturized reconfigurable unlicensed ultra‐wideband antenna with multiple band‐notch performance

“…Thus, it is desirable to design UWB antennas with reconfigurable band-notch performance. Conventionally, the reconfigurable band-notch property is achieved by using radio frequency switches such as ideal switch, 5 PIN diodes, [6][7][8][9][10][11][12][13][14] MEMS 15,16 and varactor diodes. [17][18][19][20][21] In [11], the reconfigurable band-notch is realized by controlling the states of the PIN diodes inserted in the R-shaped stub and Tshaped slot.…”

“…To achieve the reconfigurable band-notches, three PIN diodes are embedded in the C-shaped slots and the parasitic strip. Compared to the reconfigurable triple band-notch UWB antennas, 5,10,11,13,20 the size of the proposed antenna is the smallest. In comparison with the reconfigurable triple band-notch antennas for similar bands, 5,10,13 the dimension of the antenna in this work reduces 34%, 64%, and 80%, respectively.…”

Field scattering localization based on compressed sensing

“…). Ultrawide band (UWB) technology refers to one of the most state‐of‐the‐art, accurate and promising technologies, 12‐14 and it has been introduced for localization 15,16 . The mentioned UWB positioning systems are primarily employed for indoor localization in the meter range 17‐19 and in K‐band, and the optimal indoor position error also falls into the centimeter range 20 .…”