Ultra-wideband coplanar waveguide-fed hexagonal slot antennas with WLAN band rejection

Mandal, Tapan Kumar; Choudhury, Somdotta Roy; Das, Santanu

doi:10.1109/codec.2012.6509190

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Good impedance matching and wide impedance bandwidth were achieved by placing a tapered radiating patch inside a hexagonal slot. The authors of [15] also reported CPW-fed hexagonal slot antennas with hexagonal stubs to realise wide bandwidth. Nonetheless, the reported antennas have narrower bandwidths, larger sizes, and relatively complex structures compared with the configuration presented in this article.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth enhancement and size reduction of printed monopole antenna using bounding box structure

Ashong

Jung

2019

IET Microwaves, Antennas & Propagation

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A printed monopole antenna with enhanced bandwidth and reduced size using a bounding box structure is presented in this paper. The initial design comprises a microstrip‐fed rectangular monopole with a partial ground structure. A feed line offset, a slit etched on the feed line, an asymmetric transition connecting the feed line and the monopole, and an inverted T‐slot embedded in the ground are used to ensure good impedance matching. The design is modified by incorporating a bounding box structure, which introduces additional resonances hence an enhanced impedance fractional bandwidth reaching 156% (0.28 to 2.27 GHz) is obtained as compared to only 72% (0.75–1.60 GHz) realised for a conventional monopole. The electrical size of the proposed antenna is also reduced from 1.01λlthickmathspace×0.60λl to 0.39λl × 0.24λl (where λl denotes the wavelength corresponding to the lowest operating frequency of the antenna) using the bounding box configuration. The experimental and predicted results are in good agreement, and the proposed antenna demonstrates good radiation characteristics over the operating bandwidth. The proposed antenna can be applied in DVB (530–860 MHz), GSM850 (824–894 MHz), GSM900 (880–960 MHz) DCS (1710–1880 MHz), PCS (1850–1990 MHz), and UMTS (1920–2170 MHz) systems.

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Section: Introductionmentioning

confidence: 99%

Bandwidth enhancement and size reduction of printed monopole antenna using bounding box structure

Ashong

Jung

2019

IET Microwaves, Antennas & Propagation

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“…In [3], curved lines on the ground plane cause rejection bands. Use of two U -shaped gap on the ground plane [4], L -shaped slot on the defected ground plane [5], and hexagonal patch with a hexagonal slot on it [6] and octagon-shaped patch with a C -shaped slot on the truncated ground plane [7] are other techniques used to achieve rejection frequency bands.…”

Section: Introductionmentioning

confidence: 99%

A novel reconfigurable microstrip fractal UWB antenna with six variable rejection frequency bands

Nemati

Bemani

2019

Int. J. Microw. Wireless Technol.

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In this paper, a new reconfigurable microstrip fractal ultra-wideband antenna with a capability of variable rejection frequency bands is presented. The main patch of this antenna has two modified C-shaped gaps. Also, on these c-shaped gaps, 10 ideal MEMS switches are used to produce band-notch frequencies at six different frequencies of: 5.4 GHz (5.2–5.5), 5.8 GHz (5.7–5.9), 6.1 GHz (5.9–6.3), 7 GHz (6.9–7.2), 7.9 GHz (7.7–8.1), and 8.4 GHz (8.2–8.6). This antenna is fed by a 50 Ω microstrip line and works in a wide bandwidth of 2.9–11 GHz. The antenna is designed and fabricated on an inexpensive substrate of FR4. Dimensions of the antenna are 31.2 × 38.4 mm. Measurement and simulation results are in good agreement.

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“…Many UWB antenna systems were designed earlier with different radiator, feed system and ground plane mechanisms . To avoid the interference between the UWB system (3.1–10.6 GHz) and the WLAN (5150—5350 MHz and 5725–5825 MHz) system different band stop filtering mechanisms were introduced in the Antenna design.…”

Section: Introductionmentioning

confidence: 99%

Compact circular patch UWB antenna with WLAN band notch characteristics

Mishra¹,

Sahu

2016

Micro & Optical Tech Letters

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Figure 5 shows the percentage error in calculated quality factor versus r max . For better illustration of the effect of the conductivity, this figure is plotted in a logarithmic scale. It is clear that for r max between 3310 4 and 1:5310 5 , the error is <1%. As depicted, same as the case of Figure 4, there is an optimal range of r max for a known AB width and k max . For ensuring the accuracy of the method and increasing the optimal range of the parameters, one can increase the AB width. Moreover, performance of the method can be tested by plotting the field distribution. CONCLUSIONBy introducing a radial AB medium and applying the onedimension finite-elements method, a precise method for the calculation of the quality factors and resonance wavelength of the WGM microresonators is proposed. The capability of the proposed method was proved by comparing the results with those obtained by full wave method. Electron 12 (2006), 15-32. 2. M. Mohammad-Taheri and D. Mirshekar-Syahkal, Accurate determination of modes in dielectric loaded cylindrical cavities using a onedimensional finite element method, IEEE Trans Microwave Theory Tech 37 (1989), 1536-1540. 3. E. Bagheri-Korani, M. Mohammad-Taheri, and M. Shahabadi, One dimension finite-elements method for the analysis of Whispering Gallery microresonators, J Opt Soc Am A 31, 1614-1622. 4. K. Sankaran, C. Fumeaux, and R. Vahledieck, Uniaxial and radial anisotropy models for finite-volume Maxwellian absorber, IEEE ABSTRACT: The present study demonstrates the designing and characterization of a circular patch antenna having an impedance bandwidth of 2.4-13.8 GHz with band notch at WLAN operating region. The small size (30 3 40 mm 2 ) and large bandwidth (140.7% fractional band width) makes it suitable for different UWB applications. Different size reduction and matching techniques are used in this model to achieve a better response. The Quarter wave transformer matching technique is used for broad band impedance matching between the radiating circular patch and the 50 ohm source impedance. The simple design and good agreement between the simulation and the experimental results makes the design a suitable candidate for practical applications.

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Ultra-wideband coplanar waveguide-fed hexagonal slot antennas with WLAN band rejection

Cited by 3 publications

References 14 publications

Bandwidth enhancement and size reduction of printed monopole antenna using bounding box structure

Bandwidth enhancement and size reduction of printed monopole antenna using bounding box structure

A novel reconfigurable microstrip fractal UWB antenna with six variable rejection frequency bands

Compact circular patch UWB antenna with WLAN band notch characteristics

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