CPW‐fed octagonal super‐wideband fractal antenna with defected ground structure

Abstract

A coplanar waveguide (CPW)‐fed octagonal super‐wideband fractal antenna is presented. It comprises four iterations of an octagonal slot‐loaded octagonal radiating patch, CPW feedline, and modified ground plane loaded with a pair of rectangular notches. An impedance bandwidth of 3.8–68GHz (179%) – i.e. a17.89:1 ratio bandwidth – is achieved. Desirable radiation performance characteristics, including relatively stable and omnidirectional radiation patterns, are obtained over this range. The experimental and simulation results are found to be in good agreement. The designed antenna has the advantages of wider bandwidth and miniaturised size over the previously reported structures.

Design of Quad-Port MIMO/Diversity Antenna with Triple-Band Elimination Characteristics for Super-Wideband Applications

“…Table 2 gives a comparison of various parameters of the designed antenna and other similar antennas. The comparison shows that the proposed antenna configuration has several advantages over previously reported antennas [8][9][10][11][12][13][14][15][16][17][18][19][20][21], in terms of bandwidth ratio, compact size, number of radiating patches, and isolation among radiating elements. Further, the usage of CPW feeding in the proposed antenna provides the advantage of easy integration into portable devices.…”

“…In [9], an antenna comprising modified star-triangular fractal (MSTF) geometry fed by a microstrip line and a semi-elliptical ground surface was reported. A CPW-fed octagonal-shaped radiating patch modified using four fractal iterations was proposed in [10]. In [11], an octagonal-shaped radiating patch antenna using the second iteration of the fractal shape was suggested.…”

Koch Island Fractal Patch Antenna (KIFPA) for Wideband Applications

“…In the literature, several methods are suggested to improve the antenna bandwidth such as, a printed Γ-shape Fractal Antenna [12]; A Spidron and Giusepe Peano fractal slot antenna studied in [13] and [14], respectively; a combination of two fractal geometries (Koch-Minkowski and Koch-Koch) along with the slot of a rectangular printed patch antenna with partial ground plane [15]; a coaxial feeding technique of modified printed square antenna [16]; a printed U-shape antenna on a circular ground plane with an inverted U-shape slot [17]; a defected ground plane using CPW feeding technique with modified and octagonal fractal patch proposed in [18] and [19], respectively.…”

Low profile four‐port super‐wideband multiple‐input‐multiple‐output antenna with triple band rejection characteristics

“…The iterative fractal designs have multiple combinations of symmetrical and periodic structures, configured to obtain the SWB range. Based on fractal shapes, a few SWB antennas have been proposed for L‐, S‐, C‐, X‐, Ku‐, and K‐band applications . In ref.…”

“…Based on fractal shapes, a few SWB antennas have been proposed for L-, S-, C-, X-, Ku-, and K-band applications. [8][9][10][11][12][13] In ref. [8], a coplanar waveguide (CPW)-fed fractal antenna composed of a hexagonal radiator with two iterations of Sierpinski square slots was reported, the bandwidth ratio of the antenna was 11:1.…”