Resonant characteristics of aperture type FSS and its application in directivity improvement of microstrip antenna

Peddakrishna, Samineni; Khan, Taimoor; Kanaujia, Binod Kumar

doi:10.1016/j.aeue.2017.06.007

Cited by 33 publications

(16 citation statements)

References 27 publications

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“…Both EBG and AMC unit cells were not only large in size, but also generated a narrow bandwidth and nonlinear phase reflection coefficient . Typically, the uniplanar compact photonic‐band gap band‐pass layers were suspended above the antenna patch as lens or aperture to enhance antenna gain . Conversely, the multilayer band‐stop frequency selective surfaces (FSSs) were proposed to reflect the back radiation of patch monopole antennas for MWI applications.…”

Section: Introductionmentioning

confidence: 99%

“…Demonstrating a finite FSS array size for practical devices by increasing the number of array elements, however, was constricted due to electrical length. Hence, miniaturizing the unit cell size of FSS may exert performances of an infinite array …”

Section: Introductionmentioning

confidence: 99%

“…8,10 Typically, the uniplanar compact photonic-band gap band-pass layers were suspended above the antenna patch as lens or aperture to enhance antenna gain. [11][12][13] Conversely, the multilayer bandstop frequency selective surfaces (FSSs) were proposed to reflect the back radiation of patch monopole antennas 6,7 for MWI applications. Although multilayer FSSs can reflect radiation in a wide bandwidth, it can increase both design profile and intricacy.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, miniaturizing the unit cell size of FSS may exert performances of an infinite array. 12 With that, the primary objective of this study is to design broadband, compact-size, and low-profile FSS array in order to attain UDR and high gain, as well as maintaining the bandwidth of UWB planar monopole antenna. Reflection bandwidth refers to a property of reflecting radiation at a frequency range of 3.1 to 10.6 GHz of UWB with S 21 < −10 dB.…”

Section: Introductionmentioning

confidence: 99%

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High gain CPW‐fed UWB planar monopole antenna‐based compact uniplanar frequency selective surface for microwave imaging

Abdulhasan

Alias

Ramli

et al. 2019

Int J RF Microw Comput Aided Eng

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In this article, a novel uniplanar ultra‐wideband (UWB) stop frequency selective surface (FSS) was miniaturized to maximize the gain of a compact UWB monopole antenna for microwave imaging applications. The single‐plane FSS unit cell size was only 0.095λ × 0.095λ for a lower‐operating frequency had been introduced, which was miniaturized by combining a square‐loop with a cross‐dipole on FR4 substrate. The proposed hexagonal antenna was printed on FR4 substrate with coplanar waveguide feed, which was further backed at 21.6 mm by 3 × 3 FSS array. The unit cell was modeled with an equivalent circuit, while the measured characteristics of fabricated FSS array and the antenna prototypes were validated with the simulation outcomes. The FSS displayed transmission magnitude below −10 dB and linear reflection phase over the bandwidth of 2.6 to 11.1 GHz. The proposed antenna prototype achieved excellent gain improvement about 3.5 dBi, unidirectional radiation, and bandwidth of 3.8 to 10.6 GHz. Exceptional agreements were observed between the simulation and the measured outcomes. Hence, a new UWB baggage scanner system was developed to assess the short distance imaging of simulated small metallic objects in handbag model. The system based on the proposed antenna displayed a higher resolution image than the antenna without FSS.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High gain CPW‐fed UWB planar monopole antenna‐based compact uniplanar frequency selective surface for microwave imaging

Abdulhasan

Alias

Ramli

et al. 2019

Int J RF Microw Comput Aided Eng

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“…However, these structures have bulky size. In [12], the microstrip antenna (MA) with interdigital capacitance FSS superstrate achieved a high directivity and compactness of FSS size. However, the interdigital capacitance FSS superstrate must be additional designed.…”

Section: Introductionmentioning

confidence: 99%

Improved Microstrip Antenna with HIS Elements and FSS Superstrate for 2.4 GHz Band Applications

Arnmanee

Phongcharoenpanich

2018

International Journal of Antennas and Propagation

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This research presents a microstrip antenna integrated with the high-impedance surface (HIS) elements and the modified frequency selective surface (FSS) superstrate for 2.4 GHz band applications. The electromagnetic band gap (EBG) structure was utilized in the fabrication of both the HIS and FSS structures. An FR-4 substrate with 120 mm × 120 mm × 0.8 mm in dimension (W × L × T) and a dielectric constant of 4.3 was used in the antenna design. In the antenna development, the HIS elemental structure was mounted onto the antenna substrate around the radiation patch to suppress the surface wave, and the modified FSS superstrate was suspended 20 mm above the radiating patch to improve the directivity. Simulations were carried out to determine the optimal dimensions of the components and the antenna prototype subsequently fabricated and tested. The simulation and measured results were agreeable. The experimental results revealed that the proposed integrated antenna (i.e., the microstrip antenna with the HIS and FSS structures) outperformed the conventional microstrip antenna with regard to reflection coefficient, the radiation pattern, gain, and radiation efficiency. Specifically, the proposed antenna could achieve the measured antenna gain of 10.14 dBi at 2.45 GHz and the reflection coefficient of less than −10 dB and was operable in the 2.39-2.51 GHz frequency range.

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Polarization independent quad‐bandpass frequency selective surfaces with wide‐band ratio

Yadav¹,

Jain²,

Sharma

2018

Int J RF Microw Comput Aided Eng

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A single layer polarization independent quad-bandpass frequency selective surface (FSS) with wide-band ratio is demonstrated theoretically as well as experimentally. The proposed structure passes four frequency bands with wide band ratio. The proposed FSS design is implemented by incorporating alternate arrangement of four units which are rotated 90 clockwise to form a unit cell of metal over a FR4 substrate. The geometrical dimensions of proposed unit cell are optimized and arranged in such a way that the structure possesses the quad bandpass characteristic and aspect dimensions of one unit is 0.11λ × 0.11λ with respect to first resonant frequency. This FSS provides stable response for different angle of incidence in transverse electric (TE) mode and transverse magnetic (TM) mode. To validate the results proposed FSS array has been fabricated and measured in free space environment. The measured results are in good agreement with the simulated results. Excellent stability is also observed for different incident angle. K E Y W O R D Sband ratio, frequency selective surface, polarization independent, quad bandpass

show abstract

Resonant characteristics of aperture type FSS and its application in directivity improvement of microstrip antenna

Cited by 33 publications

References 27 publications

High gain CPW‐fed UWB planar monopole antenna‐based compact uniplanar frequency selective surface for microwave imaging

High gain CPW‐fed UWB planar monopole antenna‐based compact uniplanar frequency selective surface for microwave imaging

Improved Microstrip Antenna with HIS Elements and FSS Superstrate for 2.4 GHz Band Applications

Polarization independent quad‐bandpass frequency selective surfaces with wide‐band ratio

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