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Simulated and measured E-plane and H-plane radiation patterns for the proposed antenna at (a) 4 and (b) 9 GHz.
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In this letter, a novel planar monopole antenna with a variable frequency band-notch characteristic for ultrawideband (UWB) applications is presented. The UWB property is achieved by embedding two shorted rectangular quarter-wavelength resonators. Two other L-shaped quarter-wavelength resonators coupled to the radiating patch are also used in order...
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... the simulated input impedance for the proposed antenna with two optimized rectangular resonators has a new resonant frequency, within the circle, with respect to the same antenna without strips. This provides a great enhancement in the bandwidth. Fig. 8 shows the measured antenna's VSWR curves for different combinations of resonator elements. Fig. 9 shows the simulated and measured normalized far-field radiation patterns in the yz and xz planes at two different frequencies of 4 and 9 GHz. The proposed antenna has a relatively omnidirectional xz-plane (H-plane) radiation pattern at these frequencies. It is noted that the H-plane is the xz plane (i.e., ) and the E-plane is the yz ...
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A novel dual-band-aperture coupled microstrip antenna with corrugated ground plane is proposed to improve radiation performance in this letter. The dual-band operation is obtained by embedding an S-shaped slot in the radiating patch. To achieve the high gain and the reduced half power beam bandwidth (HPBW) for each frequency, the double- periodic c...
Citations
... In [13], a UWB circlelike slot antenna with stable omnidirectional patterns and a very wideband from 2.7 to 19.5 GHz (151%) is presented. The antenna is composed of a circle-like slot and [15], Fig. 3.10a, bandwidth enhancement is achieved by new additional resonant modes of two embedded shorted rectangular quarter-wavelength resonators near the feed line at the top edge of the ground plane. In [16], Fig. 3.10b, a UWB monopole antenna with a small size of 23 mm × 26.5 mm, a relatively good impedance matching, and a wideband response consists of a twotapered radiating patch with different slopes separated by a gap of length 16.8 mm and width of 0.2 mm is presented. ...
... By increasing the iterations of the modified star-triangular fractal, the antenna bandwidth will be extended. [15], (b) [16], (c) [17], (d) [18] ...
... 15 Size miniaturization of different antennas with halving technique antenna consists of a trapezoid patch radiator with a bandwidth of over 2.6-13.8 GHz is presented. ...
Ultra-wideband (UWB) communications provide a large bandwidth with a high data rate, low transmission power with lengthened battery life and secure communications, and short pulse time modulation with reduced multipath fading. Also, UWB technology has many applications such as localization, imaging, radars, wireless body sensor networks, and short-range large bandwidth communications. Recently, printed UWB antennas have received much attention because of their attractive advantages such as lightweight, low profile, compact area, low cost, broadband bandwidth, and easy fabrication. This chapter provides a detailed description of the design and principle of printed UWB antennas. A variety of printed UWB antennas are presented to investigate the state of development of UWB antennas. Furthermore, the topics of bandwidth enhancement techniques for UWB antennas, size miniaturization, incorporating single or multi-notched band(s) characteristics, broadband circularly polarized UWB antennas, reconfigurability, and UWB MIMO/diversity antennas are addressed. This comprehensive study will provide a practical viewpoint for engineers and researchers to properly select varieties of figures in terms of antenna geometry, integration, compactness, impedance bandwidth, gain, polarization, transfer function, group delay, and radiation properties.
... UWB antennas with single band rejection characteristics are designed to avoid interference from existing different narrowband radio technologies operating at frequencies covered by the UWB band or its nearby frequencies. Different methods/ researchers, like using slotted radiating or ground surface, placing parasitic patches [45][46][47][48][49][50][51][52][53][54][55][56] or installing open-ended stubs to the radiating patch, [57][58][59][60][61][62][63] and multiple other techniques [64][65][66][67][68][69][70][71][72][73][74][75][76][77] have been proposed for obtaining single band-notch characteristics. Here these different methods are reviewed in different sub-sections A, B, C, and D, respectively. ...
... Different other techniques [64][65][66][67][68][69][70][71][72][73][74][75][76][77] are also proposed for obtaining single notch characteristics in case of UWB antennas. An UWB dipole antenna with flat and sharp band notch characteristics is proposed for obtaining both WLAN band notch and a compact UWB RF-front structure. ...
... An inverted U-shaped slot is implemented on the feed line for obtaining notch characteristics in. 67,68 Ghobadi et al, 69 have proposed two shorted quarter wavelength L-shaped stubs connected to ground plane via holes for generating frequency notch performance. Then a coupled resonator has been implemented in order to obtain notch band functioning by Xie et al, 70 Moghadasi et al, 71 implement three different techniques such as: slotted patch, slotted ground and a conductor backed plane structure for eliminating the undesired WLAN band. ...
Ultra‐wideband technology has experienced a rapid growth over the last decade for its contribution in different sectors of human society. Printed antennas are considered as preferred platform for implementing this technology because of its alluring characteristics like light weight, low cost, ease of fabrication, integration capability with other systems, etc. Antennas developed for ultra‐wideband applications are desired to have notch characteristics for avoiding interference with other existing radio communication systems. The techniques related to design and developments of printed band‐notched antennas are continuously upgraded for improving the antenna performance. In this article, a comprehensive review has been carried out on ultra‐wideband antennas with band notch characteristics proposed in around last decade. The band notched UWB antennas available in the literature have broadly been classified into five different categories based on their notch characteristics like single band‐notch, dual band‐notch, triple band‐notch, quad/multiple band‐notch, and reconfigurable/tunable band‐notch, respectively. This review exercise may be helpful for beginners working on ultra‐wideband band‐notched antennas and also such a review process is not available in the open literature to the best of author's knowledge.
... Monopole Antennas are widely used in microwave application for their low cost and easy fabrication; however, their performances have not been targeted to focus on high gain and large bandwidth for decades [1,3]. Recent research work has been shown that the monopole antennas could be loaded with dielectrics or meta-material to improve their gain and bandwidth [4,5]. ...
... Schematic diagram of the slot antenna wrapped around the sensor Slot antennas which are fed with a stripline[7] can be considered a good option for wearable application because of the presence of a full ground plane and compact size. wireless sensor with a standard meander line printed monopole was designed and fabricated at Griffith University. ...
A 3D dual band slot antenna is presented for waterproof wearable wireless sensors. The size of the antenna is 52mm × 36mm × 12mm and the slot is etched on the internal walls of a waterproof plastic box which accommodates the sensor electronics. Numerical modeling of the structure against the body revealed a 10 dB impedance bandwidth of 12.3% at 2.45 GHz and 21% at 5.2 GHz respectively. The antenna features a full ground plane underneath which reduces the interaction between the human body and the radiator and so avoids the huge drop in antenna efficiency. The total efficiency of antenna is more than 90% in free space and reduces to 54% at 2.45 GHz and 70% at 5 GHz when located against the body.
... Various methods for designing band-notched UWB antenna have been presented and reported. Designs of using parasitic stubs as resonators to achieve band-notched function were presented in [5][6][7][8]. In [5], single band-notched and multiband-notched antennas have been implemented by integrating wideband planar monopole antennas with various types of microstrip resonator. ...
... A monopole antenna with band-notched function using a complex resonator was presented in [7]. A printed monopole antenna with controllable band-notched performance for UWB applications was presented in [8]. Its band-notched characteristic is achieved by embedding two shorted rectangular resonators. ...
A novel ultrawide band (UWB) antenna with dual band-notched characteristics is presented. The first band rejection is provided by an arc H-shaped slot on the radiating patch. The parametric study of the arc H-shaped slot shows that this structure enables rejectband characteristic with improved control compared to traditional H-shaped slot. Based on the single band-notched UWB antenna, the second notched band is realized by etching narrow slots on the ground plane. By tuning the parameters of these slots, the proposed UWB antenna can operate from 2.9 GHz to above 10 GHz, except for the bandwidth of 3.3–3.6 GHz for WiMAX application and 5.1–5.9 GHz for WLAN application. Simulated and measured results show that the proposed antenna provides excellent band rejection and is a good candidate for future UWB application.
... Antennas with multiple notched bands have been proposed recently. [4][5][6] Design involving rejecting WLAN band typically rejects the 5-6 GHz frequency band completely. Hence, any useful information contained within the range 5.4-5.7 GHz will be lost. ...
A compact planar microstrip-fed ultra wideband antenna for triple bands is presented and analyzed. The proposed antenna consists of semi-circular shaped radiating patch with two I-shaped stubs. It provides a wide bandwidth of 3.05–11.7 GHz. A pair of spiral loop resonators merges with radiating patch to create the first notched band in 3.3–3.7 GHz for the WiMAX system. In addition, integrated microstrip resonators are coupled with ground to generate the second- and third-notched bands in 5.2–5.4 GHz for lower WLAN and 5.7–6 GHz for upper WLAN, respectively. Experimental results of the proposed antenna exhibit good radiation pattern, stable gain, and consistent group delay performances. The time domain behavior of the antenna with and without resonator is analyzed.
... In these designs, by employing fractal-shaped tuning stubs [5], embedding a pair of L-shaped slots in the interior of the polygon slot [1], and using a pair of short L-shaped stubs [6], one or two rejected bands have been obtained. In this letter, a novel compact coplanar waveguide (CPW)-fed slot antenna with increased impedance bandwidth and dual band-notched characteristic is proposed. ...
A novel single-layer dual band-notched printed circle-like slot antenna for ultrawideband (UWB) applications is presented. The proposed antenna comprises a circle-like slot, a trident-shaped feed line, and two nested C-shaped stubs. By using a trident-shaped feed line, much wider impedance bandwidth is obtained. Due to inserting a pair of nested C-shaped stubs on the back surface of the substrate, two frequency band-notches of 5.1–6.2 (WLAN) and 3–3.8 GHz (WiMAX) are achieved. The nested stubs are connected to the tuning stub using two cylindrical via pins. The designed antenna has a total size of 26$\,\times\,$ 30 mm$^{2}$ and operates over the frequency band between 2.5 and 25 GHz. Throughout this letter, experimental results of the impedance bandwidth, gain, and radiation patterns are compared and discussed .
... Antennas with multiple notched bands have been proposed recently. [4][5][6] Design involving rejecting WLAN band typically rejects the 5-6 GHz frequency band completely. Hence, any useful information contained within the range 5.4-5.7 GHz will be lost. ...
This article presents the compact planar antenna with 3.5/5.5/8.2 GHz triple band-notched characteristics. The antenna consists of an octagon shape patch with 50 Ω transmission line. By etching two C-shaped slots in the patch and adding pair of L-shaped resonator coupled to the radiating patch, band-rejected filtering properties in the WiMAX/WLAN/ITU bands are achieved. The proposed ultrawide band (UWB) antenna is optimized to operate in the frequency band from 3 to 11 GHz for VSWR < 2. Measured results confirm that the antenna is suitable for UWB applications because of its compact size and high performance. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:539–543, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26581
... An antenna has been designed by making use of complementary split resonant rings to obtain dual band-notched characteristic [4] that has been reported recently. Single band-notch functions are achieved using rectangular patch coupled to the radiating patch [5,6]. The dual-notched bands were formed by two nested C-shaped slots embedded in the patch [7]. ...
... The composite right/light-handed transmission line (CRLH TL) is a combination of a right-handed transmission line (RH TL) and a light-handed transmission line (LH TL) [6]. The equivalent lumped element model of the LH TL or RH TL exhibits a positive or negative phase response, respectively. ...
This article presents the compact planar antenna with 3.5/5.5/8.2 GHz triple band-notched characteristics. The antenna consists of an octagon shape patch with 50 X transmission line. By
etching two C-shaped slots in the patch and adding pair of L-shaped resonator coupled to the radiating patch, band-rejected filtering properties in the WiMAX/WLAN/ITU bands are achieved. The proposed
ultrawide band (UWB) antenna is optimized to operate in the frequency band from 3 to 11 GHz for VSWR < 2. Measured results confirm that the antenna is suitable for UWB applications because of its compact
size and high performance.
... An antenna has been designed by making use of complementary split resonant rings to obtain dual band-notched characteristic [4] that has been reported recently. Single band-notch functions are achieved using rectangular patch coupled to the radiating patch [5,6]. The dual-notched bands were formed by two nested C-shaped slots embedded in the patch [7]. ...
... The composite right/light-handed transmission line (CRLH TL) is a combination of a right-handed transmission line (RH TL) and a light-handed transmission line (LH TL) [6]. The equivalent lumped element model of the LH TL or RH TL exhibits a positive or negative phase response, respectively. ...
