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This manuscript proposes a triple band filtering antenna operating in the frequency range of 2.4 to 2.484 GHz, 4.2 to 4.5 GHz, and 5.15 to 5.825 GHz for possible application in WLAN and aeronautical radio navigation. Initially, a conventional square shaped monopole antenna is designed at 4 GHz, in which staircases are introduced at the edges to enh...
Citations
... A dual-band notch antenna using sectorial and inverted U-shaped slots over a rectangular patch is reported in the article [16]. Paper [17] presents a fractal dual-band UWB antenna with a C-shaped complementary split-ring resonator on the patch's transmission line to perform dual-notch filtering. A dual-notch band UWB antenna is proposed in the article [18] using C-slot and inverted U-slot. ...
This paper discusses an elliptical ultrawideband (UWB) antenna and a dual-band UWB notch antenna. To achieve a UWB bandwidth, two corner cuts are etched into the rectangular slot on the partial ground plane. An inverted-U-shaped and conductor-shaped resonator are utilized to achieve dual-band notch characteristics on a partial ground plane. The suggested antenna has an overall dimension of . The suggested UWB antenna has a gain of 4.9 dB, a bandwidth of 2.5–11 GHz, a linear phase response, a group delay of less than 1 ns, and a steady radiation pattern. The suggested UWB notch rejects WLAN and ITU bands from 5.2–5.7 GHz and 7.2–8.5 GHz, respectively, with an impedance bandwidth of 2.5–11 GHz. The UWB notch antenna features a linear phase, a group delay of less than 1 ns, and a stable radiation pattern.
... The simulated antenna gain and antenna radiation efficiency are presented in Fig. 11. It shows that the antenna exhibits reasonable values of the gain ranging almost between 3.17 dBi and 6 dBi within the operating bandwidth; the achieved values are better than the ones obtained in (Hosain et al., 2020). Moreover, high radiation efficiency values are achieved which are almost over than 80% within the working bandwidth; these values are better than the ones presented in (Saeidi et al., 2019). ...
A novel Circularly Polarized (CP) Ultra Wideband (UWB) antenna for Ground Penetrating Radar (GPR) applications is presented and discussed in this paper. The proposed antenna is constructed by a question mark shaped radiating patch and a truncated ground plane. A prototype of the designed antenna is fabricated on the FR4-substrate with an overall volume of 0.7λ0×0.793λ0×0.035λ0 at 7 GHz. The simulated results show that the designed antenna has an Impedance Bandwidth (IBW) ranging from 3.14 GHz to 11.88 GHz (116.38%). The CP feature is analyzed and discussed confirming that the antenna maintains a CP radiation characteristic in a broadband with a 3-dB Axial Ratio Bandwidth (ARBW) ranging from 4.13 GHz to 9.28 GHz (76.81%). The measurements were done by utilizing a well calibrated R&S®ZNB Vector Network Analyzer indicating that the fabricated prototype has an IBW nearly ranging from 3.47 GHz to 12.11GHz (110.91%). The results are favorable that ensure the usefulness of this antenna for GPR applications.
... Figure 12 indicates that the gain and the radiation efficiency simulated by the designed antenna throughout the operating frequency are acceptable and rea- sonable because their values are better than the values obtained by some recently published works. The gain is varying between 1.39 and 5.68 dBi which is better than the one attained in [24]. Whereas, the radiation efficiency is almost over 90% during the working bandwidth which is better than the one achieved in [25]. ...
A compact coplanar waveguide (CPW) fed cauliflower-shaped antenna is presented and discussed in this paper. To extend the impedance bandwidth and to improve the impedance matching, fractal geometry having a cauliflower shape is introduced along the edges of the radiator. To validate the simulated results by experimental ones, a prototype of the designed antenna was fabricated on the RO-4350B substrate having a compact size of 0.3623λ0 × 0.41λ0 × 0.01524λ0 at 3 GHz. An Agilent 8722ES vector network was used for the reflection coefficient measurement revealing that the –10 dB bandwidth of the fabricated antenna offers an impedance bandwidth of 113% extending from 3.05 to 10.96 GHz. Besides, the antenna’s radiation patterns are measured in an anechoic chamber showing consistent radiation patterns characteristic over the entire working band. Furthermore, the proposed antenna has a peak gain of around 6 dBi and an average radiation efficiency almost over 90% across the entire operating band. Thus, the proposed antenna could be useful in many modern ultra-wideband (UWB) communication systems.
... Thus, as the phase increases with time, the principal current rotates in anti-clockwise orientation that illustrates a right-handed CP in the +Z-direction. [19]. Besides, the radiation efficiency values are nearly over than 75% that are superior to the ones achieved in [20]. ...
In this paper, a Circularly Polarized (CP) rectangular patch Ultra-Wideband
(UWB) antenna is presented for Ground Penetrating Radar (GPR) applications.
The designed geometry is constructed of a quasi-rectangular radiator and a
partial ground plane. It is printed on the low-cost FR-4 substrate that has
a compact size of 25×30×1.5 mm3. The calculated Impedance Bandwidth (IBW) of
the proposed CP quasi-rectangular patch antenna is spanning from 3.16 GHz to
13.7 GHz (125.03%). Moreover, the measured IBW of the fabricated prototype
is spanning from 3.2 GHz to greater than 14 GHz (>125.58%) which covers the
entire UWB range. Besides, the designed antenna reveals a wide Axial Ratio
Band-Width (ARBW) extending from 4.23 GHz to 7.02 GHz (49.6%). Therefore,
stable radiation patterns with an agreeable peak gain and high radiation
efficiency are simulated over the whole working bandwidth.
... GHz) need to be filtered out to avoid interference [3]. To realize a band notch, different methods have been stated in the literature [3][4][5][6][7][8]. In [3], a semicircular slot antenna excited by an extended semicircular patch with dimensions of 30 × 28 mm2 was presented. ...
... Two notches are achieved by adding an L-shaped slit in the ground plane and a C-shaped slot in the tuning stub. In [4], a fractal sunflower shape with a size of 32.42 × 64.3 mm2 introduces triple notches. Filtering is introduced by inserting C-shaped complementary split-ring resonator slots on the feed line. ...
A quad-port multiple-input multiple-output (MIMO) filtenna with compact dimensions of 50 × 50 mm2 are configured, in which each element is placed orthogonally to its adjacent to enhance the isolation. The MIMO element is configured based on the novel COVID-19 virus shape with a co-planar waveguide feeding structure (CPW) and dimensions 17 × 22 mm2. The element bandwidth is ranging from 3.3 GHz to more than 60 GHz. Three frequency notches are designed at 3.5 GHz for WiMAX and 5.5 GHz for WLAN, and 8.5 GHz for X-band applications. A bandpass filter (BPF) with high out of band rejection is used as a decoupling structure (DS) to improve the isolation to more than 30 dB across most of the bandwidth. The equivalent circuit model is scrutinized to investigate the enactment of the decoupling structure. The proposed MIMO filtenna system provides an impedance bandwidth of 2.4–18 GHz, a peak gain of 13.2 dBi, and an envelope correlation coefficient (ECC) less than 0.00021. In turn, channel capacity loss does not exceed 0.2. The MIMO filtenna is fabricated and measured. Good agreement between the measured and simulation results is achieved.
... Besides, the far-field radiation patterns undergo very feeble deformations in form at higher frequencies due to the excitation of higher order modes. Fig. 9 indicates that the values of the gain are alomst varying between 1.1 dBi and 6.25 dBi which are superior than the values attained in [28]. Furthermore, higher radiation efficiency values of more than 80% are obtained in the considered band which are superior than those obtained in [29]. ...
A new design of a Coplanar Waveguide-Fed (CPW) Ultra Wideband (UWB) Rhombus-shaped antenna for Ground Penetrating Radar (GPR) applications is designed and discussed in this work. The antenna has a simple design which is composed by a rhombus-shaped patch and a modified ground plane. The working bandwidth is improved by removing the metal from the upper part of the ground plane surrounding the patch and by introducing a corrugation geometry in the ground plane. The proposed antenna was designed on a low-cost FR4-substrate having a compact size of 0.2721λ0×0.2093λ0×0.0157λ0 at 3.14 GHz. All the simulations were carried out by using the commercially software CST Microwave Studio TM. The simulated results show that the designed antenna covers an UWB extending from 3.14 GHz to 13.82 GHz (125.94%) and indicate excellent radiation performances throughout the operating bandwidth. The measured bandwidth is nearly extending between 3.95 GHz and 13.92 GHz (111.58%). Besides, the antenna bandwidth response was checked in close proximity to a mass of Concrete. The obtained results are satisfactory and assure the efficiency of the designed antenna to work as a GPR antenna.
... This has been achieved by embedding band-stop filters (BSF) and band pass filters (BPF) in the UWB antennas, often referred to as filtennas , which is a single module that provides filtering and radiation simultaneously. The BSF is implemented using various methods like resonators [5][6][7][8], DMS [9][10][11][12][13][14], and DGS [15][16][17][18]. Some use a mixed combination of resonators, DMS, and DGS to create BSF and BPF [19][20][21][22][23][24][25][26][27][28][29][30]. ...
... Various techniques have been proposed and implemented to achieve band notch characteristics within an antenna [5][6][7][8][9][10][11][12][13][14], or for the structure to act as a filtenna. Filtenna offers advantages of size reduction, simple design, and multi-task operation. ...
... In [11], half wavelength stubs and slits on the patch were employed to create pass band notch. A fractal shaped antenna and filtenna were proposed for WLAN and ARN applications [14] which exhibited fair bandwidth but low gain. Embedding DGS in [15][16][17][18] produced a notch, but the generated DGS caused wave leakage which thereby affected the radiation properties at higher frequencies. ...
This manuscript proposes an Ultra-Wide band (UWB) Filtering Antenna (Filtenna) with application-based notches at Wi-MAX (3.3–3.7 GHz), WLAN (5.15–5.875 GHz), and ITU (7.725–8.275 GHz) bands.
Initially, a monopole antenna is designed. To enhance bandwidth and bring about impedance matching, its ground plane is modified by introducing a triangular shaped defected ground structure (DGS) under the feedline, smoothening of upper edges of the ground plane, and a rectangular DGS. Later, the triple notched bands is created at 3.5 GHz, 5.5 GHz and 8 GHz by utilizing the notches generated by Inverted-U shaped defected microstrip structure (DMS) on the patch, U-type DMS on feedline, and C-shaped resonator adjacent to the feedline respectively. The filtenna is an omni-directional radiation pattern antenna which works within the proposed frequency band of operation having low insertion loss and good selectivity. Also, the VSWR is found to be < 2, and peak gain is found to be 4 dBi. While studying the proposed filtenna, the simulated and measured frequency responses were observed to be in almost unison as if following each other.
