A compact printed UWB monopole antenna with triple band notch characteristics

A novel isolation improvement technique using fractal neutralization line with dual band rejection attributes in a compact UWB MIMO antenna

“…The implementation of fractal geometry for designing the band rejection elements will allow higher miniaturization of the overall band notch structure. The gross stretch S Gross of the 2nd order HFNL is computed using (1) and is more or less equal to one by two of the guided wavelength in the corresponding rejection band (3.3 GHz) shown in (2) [25,26]. Isolation improvement is achieved by using defects in the ground plane along with the use of the neutralization line.…”

Triple band Quasi-Yagi Antenna for Mutiband Applications

“…Many techniques have been suggested in this area. Various studies have been carried out on applications and technologies for the design of multi-band antennas, including inverted F-planar antennas (PIFA) [2]- [4], internal compact fourband antenna [5], multi-band antenna with multiple ring in [6] distinct from a wide-band antenna, compact printed triple band-notched Ultra Wideband (UWB) antenna in [7], Multiband antenna designs are also used to meet the requirements of multi-service and multiband communication systems, multifunctional antenna design for high-capacity and high-speed transmission rates [8]- [13], ring antennas using fractals can also provide multi-band responses by offering different modes of operation [14]- [15], however the design of the corresponding frequency bands is subject to certain restrictions and the applications are therefore limited. Due to its plane geometry and simplicity in the design process, the Yagi antenna has been commonly used to enhance the directivity [16]- [18].…”

A planar UWB semicircular-shaped monopole antenna with quadruple band notch for WiMAX, ARN, WLAN, and X-Band

“…To reject these unwanted narrow bands different method was investigated by inserting filters within the UWB antenna with a rejection characteristic, to eliminate the effect of electromagnetic interference (EMI). Many works concentrated the rejection of more than one band, many designers have been published works including dual-band reject [6][7][8][9][10][11][12][13], triple band reject [14][15][16][17], four band reject [18][19][20][21][22][23][24][25][26]. The researchers used different antenna types configuration and different slots configurations to achieve the desired notch filter for a desired narrow band rejection, the slot configuration was inserted on the radiating elements of the patch, depending on the notch frequency and the calculated length of the slot for each notch filter.…”

“…Different methods of design have been presented for an effective narrow band rejection by introducing different etching slots on the patch or ground obtaining desired notched bands in UWB, introducing three notched bands. In [14,15], they introduced three band notched UWB antenna by inserting a Hiulbert slot etched on the half eleptic shaped patch, and a slot rectangular shaped etched on the half eleptic ground [14], or etching out 2 elliptic single complementary split ring resonator on the patch with a proper dimensions and placing 2 rectangular on the pack [15]. An UWB triple band-notched antenna has been proposed in [16] by inserting a rectangular strip and two nested U-shaped slots in the antenna patch and feed, which can filter WiMAX, C-band, WLAN and X-band applications.…”