Simple dual band‐notched UWB antenna loaded with single U‐shaped resonator

Abstract

A simple dual band‐notched antenna is proposed for ultra‐wideband (UWB) applications. The basic UWB antenna, which consists of a half ring‐shaped patch and a trapezoidal ground, occupies a compact area of 25 × 25 mm2. By introducing a single U‐shaped resonator on the patch, dual band‐notched function is realized without increasing the antenna size. An additional resonance near 3 GHz can be excited by the U‐shaped resonator combined with the half ring‐shaped radiator. And the antenna impedance at 3.5 GHz is also affected which leads to a notched band. Besides, reverse currents can be produced along the resonator to produce the other notched band at 5.5 GHz. Experimental results show that the designed antenna has a wide impedance bandwidth (return loss ≤10 dB) ranging from 2.97 to 12 GHz with two rejection bands operating at 3.5 and 5.5 GHz. Meanwhile, the antenna also exhibits moderate gains and omnidirectional radiation patterns over the operating bands except at the undesired frequencies, which make it a suitable candidate for UWB applications. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2129–2134, 2015

Design of a Compact CPW-Fed Monopole Antenna With Asymmetrical Hexagonal Slot Loaded Ground Structure for C/X/Ku Band Applications

“…Hence, the compact size antenna can easily be imbedded in small devices and MMICs for modern applications. However, the impedance bandwidth (4.86 to 13.66) / 8.8 GHz of the proposed antenna is greater than the impedance bandwidth of the antennas reported in [16], [17], [19], [20] by 800 MHz, 750 MHz, 1800 MHz and 390 MHz, respectively, and lesser than that of the antenna reported in [18] by 200 MHz.…”

“…From the comparative overview of the peak gain (dBi) between the proposed antenna and reported antennas, it can be observed that peak gain of the proposed patch antenna is greater than that of antennas reported in [17], [20], equal to that of the antenna in [19] and marginally smaller than that of the antennas reported in [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.…”

“…The authors in [8] used squared patch with partial ground and slotted conductor packed plane, by inserting on the slotted conductor packed pair of mirror L-shaped slots, and U-shaped slot receiving a rejection of WLAN and WiMAX bands respectively. Different planer antenna shaped have been investigated by using one or more U-shaped slot on the patch to achieve WiMAX and WLAN band rejection [9][10][11]. A compact lamp-shaped antenna was designed and inserted a quarter L-shaped slot on the patch and two quarter L-shaped on the ground in order to eliminate the effect of WiMAX and WLAN respectively [12].…”

Circular Patch Antenna with Defected Ground for UWB Communication with WLAN Band Rejection

“…The conventional patch antennas having infinite ground plane have narrow bandwidth, low gain and normally operate at a single frequency corresponding to their dominant mode of excitation 3 . Looking these limitations and possible applications of these antennas in UWB systems, extensive work on UWB antennas has been reported in recent times [4][5][6][7] . Jang and Hwang 4 achieved a circular slot type UWB antenna that displays excellent band rejection characteristics in 5GHz rejection band.…”