A new coplanar waveguide (CPW)-fed wideband printed slot antenna is presented, and the impedance characteristics of this antenna with different sizes of tapers are discussed. The effect of tapering angle with the resonant frequency is also observed. The fundamental parameters of the antenna such as bandwidth, return loss, gain, radiation pattern, and polarization are obtained. All meets the acceptable antenna standards. The measured input impedance bandwidth (return loss < −10 dB) of the prototype antenna is 52% (4.27–7.58 GHz). The radiation patterns are bidirectional in both planes. This antenna can be part of various wireless communication systems.

In this article, a novel microstrip patch textile antenna is to be designed for wearable applications. The designed antenna has the design parameters of the size is 90 × 70 × 1.57 mm3 and the substrate is Jeans cloth whose dielectric constant is 1.6. The proposed antenna can be operating the resonant frequency at 2.45 GHz with a return loss of −20 dB. The proposed antenna has a gain of 2 dBi and VSWR is around 1.4 at the resonating frequency. This proposed novel antenna can be used in military jackets, because of its merits like compatibility, more flexible in designs and shape, excellent performance at different bending angles, human safety, miniaturization, power consumption etc.

In this article, a compact coplanar waveguide (CPW) faded rose flower shaped fractal antenna is presented. The proposed design consists of a rose patch (top) and a split ring resonator loaded beneath the FR4, which are accountable for achieving multiple band characteristics, smallness, and fine impedance matching. The SRR rose antenna with a compacted dimension of 12 × 12 × 1.6 mm3 is fabricated and tested. The testing results show that the design proposed, having −10 dB for 1.031, 4.591, 8.284, 13.41, and 17.17 GHz, respectively, covers WLAN/IEEE 802.16/Wi‐MAX/ITU bands. It has fine radiation characteristics for both E field and H field in all the preferred operational bands and generates superior performances compared to the existing designed antenna in the reviews. The loaded rose fractal SRR structure recital is validated through negative permeability extraction and different parametric studies.

In this paper, we present the concept of transmitting power without using wires i.e., transmitting power as microwaves from one place to another is in order to reduce the transmission and distribution losses. This concept is known as Microwave Power transmission (MPT). We also discussed the technological developments in Wireless Power Transmission (WPT). The advantages, disadvantages, biological impacts and applications of WPT are also presented.

In this chapter, an implantable coplanar waveguide (CPW) fed monopole U Slot antenna at industrial scientific and medical (ISM) band for biomedical applications is proposed. The proposed antenna has a overall dimensions of 29 mm 3 29 mm 3 0.5 mm at the ISM band (2.4-2.48 GHz). The proposed antenna placed on human tissues like skin, fat, and muscle. The designed antenna is made compatible for implantation by embedding it on RT Duroid substrate and the 10 dB return loss bandwidth is 5.24% ranging from 2.35 to 2.5 GHz. Implantable CPW fed monopole slot antennas are being significantly used into implantable medical devices and RF, because of its merits like conformability, flexibility in design and shape and also it has biocompatibility, patient safety, miniaturization, power consumption etc.

A novel design of a microstrip patch antenna incorporated by two orthogonal L‐shaped switchable slots is proposed to achieve circular polarization. Two pin diodes are inserted into these L‐shaped slots and by making these two pin diodes ON and OFF the antenna can radiate with either right handed circular polarization or left handed circular polarization with wide bandwidth. This antenna can be used in unlicensed & licensed WiMAX (IEEE802.16a), future planetary missions and satellite link. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2348–2350, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23674

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