Inverted Diamond-shaped Notched Substrate and Patch for High-frequency Interference on Ultra-wideband Antenna

Abdulhasan, Raed Abdulkareem; Ramli, Khairun Nidzam; Alias, Rozlan; Audah, Lukman; Mumin, Abdul Rashid O.

doi:10.11591/ijece.v7i6.pp2929-2935

Cited by 6 publications

(6 citation statements)

References 10 publications

(15 reference statements)

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“…The first resonance frequency ( f 1 ) of the proposed asymmetrical side length of the hexagonal antenna was derived based on its radius ( R ) and the angle ( a ) instead of the unknown sides' length S 1 and S 2 . To the best of the author knowledge, the general Equation () is derived only in this study to calculate the f 1 of any asymmetrical hexagonal patch as:

f_{1} goodbreak= \frac{14.4}{([], ((), 2 goodbreak\times R) goodbreak+ italicLg goodbreak+ ((), \frac{2 \times R \times \sin (a) \times \cos^{3} (a)}{π \sqrt{ε_{eff}}}) goodbreak+ \frac{{italicWg}_{total}}{2 π \sqrt{ε_{eff}}} goodbreak+ p) \times k} .

where f 1 was the first frequency of the antenna in GHz, ε eff was the effective dielectric constant, R was the radius of the circle that attached the patch corners in cm (see Figure 2B), a ° was the angle between the side S 1 , and the ground plane edge (0° < a ° < 45°), p was the prop spacing, and k = 1.15 was the constant dielectric loss for the FR4 substrate, Lg was the ground plane length in cm and Wg was the single ground plate width in cm (for CPW total area of two plates Wg total = 2 × Wg ) 27 …”

Section: Uwb Antennamentioning

confidence: 99%

Directional and isolated UWB‐MIMO antenna‐based uniplanar UWB‐FSS array and T‐strip for bi‐static microwave imaging: Baggage‐scanner

Abdulhasan

Alias

Ramli

et al. 2021

Int J RF Mic Comp-Aid Eng

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This article presented a novel compact multi‐input‐multi‐output (MIMO) hexagonal monopole antenna with a uniplanar compact frequency‐selective‐surface (FSS) array for microwave imaging (MWI). The ultra‐wideband (UWB) dual‐element linear MIMO antenna was designed on the FR4 substrate with 50 Ω coplanar waveguide feed, T‐strip isolation, novel numerical calculation and equivalent circuit analyses. The main issues of realising high‐resolution images based on planer UWB antenna for MWI are the low gain, omnidirectional pattern, design size and mutual coupling of MIMO design. A novel technique was proposed to solve a hybrid issue (mutual coupling) of the MIMO reflected‐waves from the FSS array and direct‐wave. The uniplanar UWB‐FSS unit cell was compacted by combining a square‐loop and cross‐dipole with a size of 0.095λ × 0.095λ. The novel‐isolated UWB‐MIMO antenna and UWB‐FSS array (IMAF) were integrated, after investigating the distance between the antenna and FSS. The fabricated IMAF with a stable gain improvement of 4.5 dBi higher than the antenna without FSS, directional radiation pattern, size of 30 × 73.8 × 21.6 mm3 observed that a low mutual coupling of −27 dB, and operation bandwidth of 3.0–11.7 GHz. Moreover, a handbag was scanned experimentally via the bi‐static approach to detect a small concealed object. The MWI system based on the MIMO antenna with FSS was displayed image resolution of 55% higher than that of MIMO antenna without FSS. The new baggage‐scanner approach confirmed that the proposed MIMO antenna with FSS array can lead the humanity for healthy MWI applications.

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f_{1} goodbreak= \frac{14.4}{([], ((), 2 goodbreak\times R) goodbreak+ italicLg goodbreak+ ((), \frac{2 \times R \times \sin (a) \times \cos^{3} (a)}{π \sqrt{ε_{eff}}}) goodbreak+ \frac{{italicWg}_{total}}{2 π \sqrt{ε_{eff}}} goodbreak+ p) \times k} .

Section: Uwb Antennamentioning

confidence: 99%

Directional and isolated UWB‐MIMO antenna‐based uniplanar UWB‐FSS array and T‐strip for bi‐static microwave imaging: Baggage‐scanner

Abdulhasan

Alias

Ramli

et al. 2021

Int J RF Mic Comp-Aid Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…The band-rejection can be achieved by implementing slots of certain lengths in the radiating patch or the feed line [6,[15][16][17][18][19][20]. In this design, a rotated C-shape slot is etched in the radiating patch as shown in Figure 4.…”

Section: The Single Notch Antennamentioning

confidence: 99%

UWB elliptical patch monopole antenna with dual-band notched characteristics

Majeed

Sayidmarie²

2019

IJECE

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In this paper, a new approach to the design of an UWB monopole antenna with dual band-notched characteristics is presented. The antenna has the form of an elliptical monopole over a ground plane having an elliptical slot to achieve the UWB. The dual-band notch function is created by inserting a U-shaped and a C-shaped slots on the radiating patch, thus no extra size is needed. The proposed antenna shows a good omnidirectional radiation pattern across the band from 3.2 to more than 14 GHz. The dual band-rejection is for 4.88-5.79GHz centered at 5.4GHz and 7.21-8.46 GHz centered at 7.8 GHz. The antenna prototype using the FR-4 substrate with εr=4.3 has a compact size of 25mm×25 mm ×1.45mm. The fabricated prototype showed experimental results comparable to those obtained from the simulations.

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“…High data rates, large operation bandwidth, flat gain, and compactness the merits offered by microstrip ultra wide band antennas were so attractive for the new demands of the fast grow in mobile communications world [1]. But unfortunately, portions of the range (3.1-10.3 GHz) that is declared by federal communications commission (FCC) for ultra wide band (UWB) communications [2] can be used by other wireless technologies like WiMax, Cband, wireless local area network (WLAN), Xband, and international telecommunication union (ITU) that are granted the bands (3.3-3.6 GHz), (3.7-4.2 GHz), (5.15-5.825 GHz), (7.25-7.75 GHz), and (8.02-8.4 GHz) respectively [3]. Clearly, this dual use of the same frequencies by different wireless technologies can result in interference that requires antennas with filtering capabilities to prohibit the undesired radiation.…”

Section: Introductionmentioning

confidence: 99%

A single port frequency reconfigurable antenna for underlay/interweave cognitive radio

Abdullah

Sallomi

Jassim

2022

IJEECS

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A frequency reconfigurable antenna is presented in this paper as a novel single port system gathering the functionalities of both underlay and interweave cognitive radio. This 25×30×0.8 mm3 system involves a wide slot antenna to cover the ultra wide band (UWB) range with resonating stubs that are used to prohibit/work-only-in specific bands within the UWB frequencies. Here, six positive intrinsic negative (PIN) diodes are used to decide the active sections of the antenna that leads to select its operation as UWB/filtering/multiband antenna. Diodes' configuration results in eight useful operation modes that include a scanning mode, four single band-notch modes and three dual band communication modes. The scanning mode covers the entire UWB range while one of the bands allocated for WiMax, Cband, WLAN or Xband is to be excluded in each of the band-notch modes. On the other hand, each communaication mode is able to work in one of the ranges that cover WiMax/Cband, Cband/WLAN or Xband/international telecommunication union (ITU). S11, realized gain, voltage standing wave ratio (VSWR) outcomes of this design that is simulated by computer simulation technology (CST) v.10 all confirms the proposed system's ability to work in the intended modes. Its novelity to work as interweave/underlay cognitive radio system, highly candidates this design to address many of the UWB communication issues related interference and multiband operation

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Inverted Diamond-shaped Notched Substrate and Patch for High-frequency Interference on Ultra-wideband Antenna

Cited by 6 publications

References 10 publications

Directional and isolated UWB‐MIMO antenna‐based uniplanar UWB‐FSS array and T‐strip for bi‐static microwave imaging: Baggage‐scanner

Directional and isolated UWB‐MIMO antenna‐based uniplanar UWB‐FSS array and T‐strip for bi‐static microwave imaging: Baggage‐scanner

UWB elliptical patch monopole antenna with dual-band notched characteristics

A single port frequency reconfigurable antenna for underlay/interweave cognitive radio

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