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This work investigates the design of a flexible Minkowski fractal antenna. Two potential materials are included for examination - conductive copper tape and ShieldIt conductive textile. Both are designed and simulated to achieve a satisfactory resonance at the Very High Frequency (VHF) band for Land Mobile Radio (LMR) application through proper structure(More)
Bandwidth characteristics of a wearable antenna are one of the major factors in determining its usability on the human body. In this work, a novel structure is proposed to achieve a large bandwidth, in order to avoid serious antenna reflection coefficient detuning when placed in proximity of the body. The proposed structure is designed based on a simple(More)
A circular profile microstrip antenna and its related structural dimensions meant for 5850–7075 MHz Malaysia HAPS operating band are investigated here. Appearing by three layers and having layer three surface copper re-shaped on a microwave laminate. It was by varying the middle air gap spacing's height covering layer two regions. At the same time,(More)
This work presents the design and investigation of the monopole and Koch fractal antenna. The fractal concept and geometry has been used in antenna design to obtain multi-band behavior and miniaturized size, as both of these characteristics are important requirements in current antenna design trends. The aim of this paper is to evaluate the antenna(More)
Placement variation is one example of parameters that critically affects the performance of RF absorbers. In this work, four designed variation patterns - W, X, Y, and Z were discussed to compare the reflectivity (S<inf>11</inf>) of designed wedge microwave absorbers. Two sub-shapes were investigated in this work - straight wedge and oblique wedge, each(More)
Characterization of efficiency is an important consideration to ensure the proper operation of an all-textile wearable antenna. In this work, a small, novel textile antenna is designed based on a planar inverted-F structure (PIFA). The structure incorporates an edge-feeding plate, symmetrical design, and well-placed slot, in order to ease fabrication. A(More)
Performance of UWB system may be degraded since the interference may be exist due to the presence of signals from other existing wireless communication systems. Currently, the major interference are in-band signal from 802.11a WLAN system which occupies the 5&#x2013;6 GHz spectrum and signals from 802.11b/g WLAN system covering 2.4&#x2013;2.48 frequency(More)
A circularly microstrip antenna (CMSA) with its related geometry intended for 5850 &#x2013;7075 MHz Malaysia HAPS operating band are presented here. Construction are made into three layers having layer three surface copper re-formed on a microwave laminate (&#x025B;<inf>r</inf> = 2.2) and by varying its middle air gap spacing's height. At the same time,(More)
Presented here is a microstrip antenna designed for Ultra Wideband (UWB) with an achievement of return loss below &#x2212;10dB beginning from 6.5 GHz to 10.5 GHz attaining a bandwidth of 4 GHz. It radiates omni-directionally with similar energy emission throughout the operating band. The key for bandwidth increment comes from the third layer rectangular(More)
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