Arrow Cross Shape Slotted Fractal Antenna With Enhanced Bandwidth for Wi-Fi/Wimax/Wlan Applications

Abstract

A fractal antenna with enhanced bandwidth (BW) from 2.62 GHz to 5.2 GHz is presented for Wi-Fi applications. The antenna is designed to achieve a wider BW, and it consists of a rectangular shape patch attached to a half circular disc. The antenna is fed by microstrip feed model. The ground plane of the antenna is maintained partial with a slot at centre. Double head arrow cross shaped slots are etched on the radiating element to form the proposed fractal antenna. While the centre slot is made to look like + symbol, the surrounding four fractal slots are made to look like × symbol. FR4 substrate with dielectric constant 4.4 with thickness 1.6 mm is used to design the antenna. The overall size of the antenna is maintained compact with dimensions 44 mm × 40 mm. The dimensions of the fractal slots are varied, and the operating band is tuned. The proposed antenna covers from 2.62 GHz to 5.2 GHz with BW 2.58 GHz. The step-by-step implementation of the fractal antenna and comparative analysis are presented with the help of reflection coefficient curves. While the proposed antenna covers wideband, it showed peak resonance at dual operating frequencies at 3.2 GHz and 4.8 GHz. The designed antennamaintained gain of 2.96 dBi and 3.47 dBi at 3.2 GHz and 4.8 GHz frequencies, respectively. The proposed antenna performance is presented with the help of reflection coefficient, VSWR, gain, field distributions, and radiation pattern curves. The simulated and measured analysis comparison showed good agreement making the designed antenna a good candidate for wideband Wi-Fi applications.

A Π-shaped slotted patch antenna with a partial ground structure for lower 5G/WiFi/WiMAX applications

“… Parameter Reference No. This work [ 8 ] [ 9 ] [ 13 ] [ 14 ] [ 16 ] [ 17 ] [ 18 ] [ 19 ] [ 20 ] [ 21 ] Size (L×W×h) mm 3 30 × 20×1.5 36 × 16 × 1.6 31 × 36×0.8 22 × 24×0.25 44 × 40×1.6 45 × 44.92 × 1.6 35.5 × 40.1 × 1.6 76 × 42 × 1.6 150 × 75× 1.6 36 × 24×1.5875 35 × 31×0.79 Substrate material FR4 FR4 FR4 Rogers RT 5880 LZ FR4 FR4 FR4 FR4 FR4 FR4 Rogers RT 5880 Operating frequency range (GHz) 3.15–5.55 3.3–4.00 3.29–3.63, 4.3–5.2 2.9–4.4 2.62–5.2 3–5.48 2.8–4.6 1.341–3.834 3.21–3.81 3.36–3.715 2.87–5.47 Centre frequency 4.80 3.65 3.3, 4.5 3.6 3.2, 4.8 4.2 3.008 1.6, 3.8 3.5 3.5 3.47 Reflection coefficient (dB) ≈ -32 ≈ -31.15 ≈ -21, ≈ -22 -28.76 ≈ -41, ≈ -47 ≈ -28, -27 -41.35 ≈ -23 ≈ -34 >-10 ≈-55 -36.81 Gain (dB) at centre frequency …”

Analysis of Compact Quadruplet Arrow Slotted Notch Band Antenna with Defected Ground Structure

“…Various attempts have been made to insert a notch filter in the design of a UWB antenna to suppress or reject signals within the desired narrowband range. A literature survey reveals that the use of various shapes of slots and slits on the radiating patches or partial ground in printed monopole antenna (PMA) offers simplicity, ease of fabrication, improved bandwidth, suitable radiation pattern, which is all desirable characteristics for practical antenna design * Correspondence e-mail: tislam7@cougarnet.uh.edu like flower shaped patch [5], meander line slots [6], Cslots [7], J-shape slits [8], and capsule shaped patch [9]. In ref.…”