A printed planar antenna with simple and intelligent geometrical structure has been proposed for Ku/K band satellite communication systems. The radiating patch of the antenna is formed by cutting rectangular slots and extending the radiating element to some extent. The final design of the antenna with optimized parameters is fabricated on ceramic-polytetrafluoroethylene substrate materials of dielectric constant ε r = 10.2. The antenna is excited through a microstrip feed line and has reduced ground plane that covers only the non-radiating portion of the antenna. The reduced complexity of the antenna is easy to fabricate and has overall dimension of 40 × 35 × 1.905 mm 3 . The results from experimental analysis show that the proposed antenna can guarantee a wide bandwidth of 12.0 to 16.4 GHz at lower band, and the upper band covers the frequency in the range of 17.53 to 19.5 GHz. The antenna has achieved appreciable gain in the range of 3.14 to 4.68 dBi for lower band and 2.03 to 3.65 dBi for upper band. The proposed antenna has offered almost symmetrical and directional radiation pattern that is essentially suitable for serving Ku/K band satellite applications.

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A printed antenna has been designed based on two‐dimensional image of a fractal‐jet fluid. The numerical analysis performed with HFSS software has reported multiband resonances over the frequency band 1–20 GHz. Experimental characterization in terms of impedance matching, bandwidth, gain, and radiation patterns over the band 1–6 GHz has shown a unique electromagnetic response of the antenna allowing it to be used as a chipless RFID tag for security applications. Details on the antenna design, numerical, and experimental results are presented and discussed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:75–82, 2016

In this article a microstrip planar antenna with new bandwidth enhancement technique is proposed for broadband wireless communication. The antenna consists of a rectangular radiating patch, a fed line, and a conducting ground plane. To increase the operating band of a conventional microstrip patch antenna, the radiating patch is shifted from the center of the substrate (asymmetric) while the feed line is made as off‐set. It is observed that this asymmetric patch and off‐set feed line improve the impedance matching resulting in a bandwidth enhancement of more than 115% without changing of the overall antenna size. It is observed from the measurement that the proposed planar design with this technique can achieve an operating band ranging from 2.96 to 19GHz (146%) which makes it very suitable for a number of wireless communication applications such as WiMAX, WLAN, UWB, C‐band, X‐band, Ku‐band etc. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1221–1226, 2016

IndexTerms-Capacitively loaded loop (CLL), metamaterial-inspired structures, multiband behavior, printed dipole antennas, radiation patterns.