Assessment of microstrip patch antenna performance based on dielectric substrate

Mumin, Abdulrashid O.; Alias, Rozlan; Awaleh, A. A.; Abdulhasan, Raed Abdulkareem

doi:10.1109/i4ct.2015.7219621

Cited by 12 publications

(4 citation statements)

References 5 publications

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“…Figure 1 illustrates the proposed antenna's geometry. A copper‐clad with a thickness of 0.0035 mm on FR4 substrate was used to design the antenna with size of 1.6 × 30 × 31.9 mm 3 and a relative permittivity of 4.3 24 …”

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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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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show abstract

“…where parameters G and B can be defined by (15) and (16), respectively, by using (13) and 14: Thereafter, by assuming R L = Z 0 and by using t = tan βL 1 = tan 2π L 1 , the distance of stub impedance from BLC, L 1 can be determined using (19):…”

Section: Andmentioning

confidence: 99%

5G planar branch line coupler design based on the analysis of dielectric constant, loss tangent and quality factor at high frequency

Shukor

Seman

2020

Sci Rep

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This study focuses on the effect of different dielectric properties in the design of 3-dB planar branch line coupler (BLC) using RT5880, RO4350, TMM4 and RT6010, particularly at high frequency of 26 GHz, the fifth generation (5G) operating frequency. The analysis conducted in this study is based on the dielectric constant, loss tangent and quality factor (Q-factor) associated with the dielectric properties of the substrate materials. Accordingly, the substrate that displayed the best performance for high frequency application had the lowest dielectric constant, lowest loss tangent and highest Q-factor (i.e., RT5880), and it was chosen to enhance our proposed 3-dB BLC. This enhanced 3-dB BLC was designed with the inclusion of microstrip-slot stub impedance at each port for bandwidth enhancement, and the proposed prototype had dimensions of 29.9 mm × 19.9 mm. The design and analysis of the proposed 3-dB BLC were accomplished by employing CST Microwave Studio. The performance of scattering parameters and the phase difference of the proposed BLC were then assessed and verified through laboratory measurement.

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“…Table 1 summarizes the dimension of the proposed antenna while Table 2 shows the comparisons of the proposed antenna with other references. In order to achieve the desired resonant frequency, the following mathematical approach is applied [20].…”

Section: Antenna Design 21 Antenna Geometrymentioning

confidence: 99%

“…61 GHz Yagi-Uda antennas is presented for on-body communication [17]. Microstrip, planar and vertical monopole antennas were presented and their suitability as wearable antennas [18][19][20][21][22][23][24]. Alternatively, the electromagnetic bandgap structure (EBG) is included in the design of the antenna, which can be used to provide a high level of isolation from the human body 371 and to reduce SAR in tissue.…”

Section: Introductionmentioning

confidence: 99%

Design a compact square ring patch antenna with AMC for SAR reduction in WBAN applications

Mumin¹,

Alias²,

Abdullah³

et al. 2020

Bulletin EEI

Self Cite

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In this paper presents a compact square ring patch antenna with miniaturized AMC structure at 5.8 GHz for WBAN applications. To minimize detuning, keeping its radiation efficiency high and acceptable gain while keeping the SAR levels low for safety is a challenging task. One of the critical issues in WBAN antenna design is the size of the antenna for portable devices, because the size affects the gain and bandwidth. The AMC configuration decreases the back radiation and the effect frequency detuning results from the high loss in the human body. Furthermore, the AMC also increases the front-to-back ratio (FBR) of 15.3 dB. The proposed antenna has dimensions of 15.27×15.27×2.2 mm3 and provides a 404 MHz impedance bandwidth, with a gain improvement of 8.69 dBi and a 93.7% reduction of the initial SAR value. For this reason, the antenna is suitable for WBAN application in various fields, particularly in medical technology.

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Assessment of microstrip patch antenna performance based on dielectric substrate

Cited by 12 publications

References 5 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

5G planar branch line coupler design based on the analysis of dielectric constant, loss tangent and quality factor at high frequency

Design a compact square ring patch antenna with AMC for SAR reduction in WBAN applications

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