Planar square multiband frequency reconfigurable microstrip fed antenna with quadratic Koch‐Island fractal slot for wireless devices

Abstract

A planarprinted multiband microstrip fed antenna with reconfigurable frequency performance was designed for multistandard wireless communication systems. The antenna consists on a square shaped patch with an optimized centered Koch‐Island fractal slot. The antenna allows a reconfigurability of the frequency bands by incorporating 16 PIN diodes inside the fractal slot which is highly complex. That is why short and open circuits will be used to produce frequency agility instead of RF switches (for proof of the concept). The proposed antenna is capable to switch between 15 operating frequency bands centered at 1.7, 1.77, 2.36, 2.43, 3.30, 3.61, 3.67, 3.79, 4.05, 4.34, 4.59, 5.2, 5.27, 5.47, and 5.57 GHz through four operating modes M1–M4 over the wide range 1–6 GHz. Prototypes corresponding to different modes were manufactured and characterized. Simulated and measured results are presented and discussed. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:207–212, 2015

Compact coplanar waveguide‐fed reconfigurable fractal antenna for switchable multiband systems

“…Furthermore, a minimum number of diodes have been used to generate multiple resonating frequencies, which reduce the cost of the antenna system. Besides, this antenna has a simple structure and a compact size as compared with the antennas reported in the literatures [21][22][23][24][25].…”

“…In [23], a dual-band reconfigurable Koch fractal antenna has been designed with dimension of 30 × 30 × 3.2 mm 3 for global system for mobile communication/wireless fidelity (1.8/2.48 GHz) wireless applications. Also, a planar square Koch fractal antenna with reconfigurable frequency performance has been fabricated with dimension of 70 × 70 × 0.8 mm 3 by using 16 PIN diodes in [24]. In [25], a square planar antenna with centred Koch-Island fractal slot was used to achieve multiband operating bands over the frequency range 1-6 GHz by positioning ten RF MEMS switches.…”

Design of reconfigurable integrated substrate integrated waveguide (SIW) filter and antenna using multilayer approach

“…[1][2][3] Previous studies have primarily concentrated on the various techniques of the integrating technology between reconfigurable filter and reconfigurable antenna for wireless communication systems. [4][5][6][7] Multiple designs were studied and each analysis has exclusive techniques for designing reconfigurable integrated filter and antenna (filtenna). Based on the designs, the most popular features of filters and antenna at present are in compact size, liberty in selecting operating frequencies, better return loss, lower insertion loss (for filter), and easy to design as well as fabrication.…”

A Modified Multiband Planar Antenna for Wireless Commnunications

“…These antennas operate at different wireless standards, such as DCS-1800 (1710 MHz-1880 MHz), LTE at 2.6 GHz (2570 MHz-2640 MHz), IEEE 802.11 WLAN at 5.1 GHz (5 GHz-5.5.875 GHz), and satellite communication C-band applications (4 GHz-8 GHz). Among the various classifications of antennas, planar antennas perform well due to their resonance behavior for more than one frequency [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In recent years, designs with a low profile have gained attention due to their ability to generate multiband frequencies.…”

“…The attachment of this part in the inner disc alignments and terminating copper strips permits resonating in the following frequency bands: 3.3-3.7 GHz, 5.15-5.85 GHz, and 0.25-7.75 GHz for WiMAX, WLAN, and X-band applications, respectively [5]. A planar square-shaped, multiband, microstrip-fed antenna with a Koch fractal slot has been developed with an island fractal slot that permits operating at various resonant frequencies, such as 1.7 GHz, 2.36 GHz, 2.43 GHz, 3.61 GHz, 3.67 GHz, 4.59 GHz, 5.2 GHz, and 5.7 GHz, for wireless applications [6]. A compact, broadband planar antenna for DCS-1800, GPS, UMTS, and Wireless LAN has been proposed.…”