Compact Planar Monopole Uwb Antenna With Quadruple Band-Notched Characteristics

Abstract

Abstract-A compact planar monopole UWB antenna with quadruple band-notched characteristics is analyzed and presented. By introducing a C-shaped slot, nested C-shaped slot in the radiating patch and U-shaped slot in the feed line, quadruple band-notched characteristics are achieved at frequencies of 2.5, 3.7, 5.8 and 8.2 GHz. The proposed antenna has been fabricated and tested. Measured impedance bandwidth of the antenna is 2.35-12 GHz, which covers Bluetooth and UWB band, for VSWR < 2 and also has four stop bands of 2.44-2.77, 3.42-3.97, 5.45-5.98 and 8-8.68 GHz, for VSWR > 2, for rejecting 2.5/3.5 GHz WiMAX, WLAN and ITU 8 GHz band signals, respectively. The average gain of this antenna is 4.30 dBi with a variation of ±1.8 dBi over the whole impedance bandwidth. Significant gain reduction over the rejected band is also observed. The antenna shows good omnidirectional radiation patterns in the passband with a compact size of 40 mm × 34 mm.

A modified split ring resonator based printed compact monopole UWB antenna with spiked elliptical radiator having five band rejection features

“…The group delay is more or less stable for the entire resonance band, but there is a sharp and huge change in the notches. Table depicts a comparison of the proposed antenna with some recently reported antennas in References . Some major conclusions can be drawn after doing the comparative study, that is, size of the proposed antenna is minimum among the various listed antennas, the whole impedance bandwidth of the specified frequency bands has been covered for which notches had been designed, no additional use of thin parasitic elements which ultimately make the fabrication procedure difficult and novelty of antenna geometrical configuration.…”

“…But both these antennas have the limitation of large size. A compact monopole UWB antenna of dimension 34 × 40 mm 2 has been reported in which four band notches have been achieved by using C and U shaped slots . In this particular article the WLAN band has not been completely notched as it rejects only the frequencies between 5.45 and 5.98 and thus interference exists in UWB antenna because of 5.15 to 5.45 bands.…”

Gain enhancement of a quad notched CPW fed UWB antenna

“…Two pairs of modified C shaped slots in the ground plane and two modified inverted U shaped slots (MIUSS) in radiating patch are integrated to filter two higher and two lower frequencies respectively with the notch centered at 3.56, 3.9, 5.32, and 7.74 GHz. Previous to this work, different researchers [12][13][14] have also proposed quad notched antenna with different techniques but with the less gain. Different techniques for high gain antenna is reported [15][16][17][18][19][20][21] recently by using concept of artificial magnetic conductor, 15 beam steering, 16 and metamaterial.…”

Design and Analysis of Two Novel CPW-Fed Dual Band-Notched Uwb Antennas With Modified Ground Structures

“…Recently, many band-notched UWB antennas have been proposed in the literature [14][15][16][17][18][19][20][21][22], and they are fed by microstrip line with metallisation on both sides of the substrate, and hence they cannot be integrated with other circuits. For easier integration with active devices and realization of series and shunt connections on one side of the substrate, some CPW-fed dual band reject UWB antennas have also been proposed [23][24][25].…”

“…For easier integration with active devices and realization of series and shunt connections on one side of the substrate, some CPW-fed dual band reject UWB antennas have also been proposed [23][24][25]. The size of these mentioned antennas [14][15][16][17][18][19][20][21][22][23][24][25] is larger than our proposed antennas of size 30 × 30 × 1.6 mm 3 . One of the challenges to design dual-or multi-band notched monopole UWB antenna is to maintain good antenna performance in terms of gain and radiation pattern characteristics.…”