Optical antennas have been widely used for sensitive photodetection, efficient light emission, high resolution imaging, and biochemical sensing because of their ability to capture and focus light energy beyond the diffraction limit. However, widespread application of optical antennas has been limited due to lack of appropriate methods for uniform and large area fabrication of antennas as well a...

A low cost, ultra small Radio Frequency (RF) transceiver module with integrated antenna is one of the key technologies for short range millimeter-wave wireless communication. This paper describes a 60 GHz-band transmitter module with integrated dipole antenna. The module consists of three pieces of low-cost organic resin substrate. These substrates are vertically stacked by employing Cu ball bo...

Modern test equipment used for antenna measurements, such as vector network analyzers (VNA), generally provide unbalanced coaxial measurement ports. This presents a problem when performing measurements on devices such as dipole antennas, which present a balanced input. A balun must be used to interface the dipole to the VNA. Since there is no straightforward way to include the balun in the stan...

Analytic descriptions of the fields of pulsed, finite-sized antennas are only approximate. For a review, see [1]. In general, numerical simulations are required for detailed characterization of the fields of pulsed antennas. See, for example, [2, 3, 4, 5, 6]. Here, we note that an “exact” form can be given for the fields in both the near and far zones of a pulsed dipole antenna in the limit tha...

In this paper,design optimization of Log Periodic Dipole Antenna (LPDA) has been carried out using Genetic Algorithm. The design objectives of this work is maximization of gain and minimization of VSWR.This has been achieved by variations in geometrical parameters of log periodic dipole antenna like maximum length, minimum length,spacing factor (σ). The simulation results have attained gain fro...

A new planar antenna, suitable for use on a shoulder, has been studied for police and fire service portable radios in the 350-MHz band. This shoulder-mounted antenna, which is a type of planar inverted F antenna (PIFA), features extreme compactness while maintaining a higher gain than that of a conventional whip antenna and small impedance changes in the presence of a human body. The low-profil...

In this work, several reconfigurable antennas are presented and discussed. The antennas to be presented cover a wide range of designs such as fractal antennas, triangular antennas, dipoles and monopoles with variable sleeves. All these antennas make use of MEMS switches, to make them reconfigurable. Some of the challenges that the designer has to face in biasing and integrating these switches w...

One of the most important aspects for body centric communication is the development of the textile antenna for on-body communication. Antennas for on-body environment usually suffer performance degradation caused by the human body. Apart from that, textile antenna gets easily bent, flexed, wrinkled or wet. This paper presents an investigation on three different designs and types of planar anten...

A multi band sleeve dipole antenna for jammer application is proposed. The antenna can cover band in which mobile and other wireless devices operate. The design antenna shows very good omnidirectional characteristics and scattering parameter S11 value less than -10db. The dipole is made of two concentric hallow cylinder with different radius and different lengths. The antenna is fed at the cent...

Abstract—In this paper, a triple-band printed dipole tag antenna is proposed for Radio Frequency Identification (RFID). The tripleband printed dipole antenna is designed to operate at 0.92GHz, 2.45GHz and 5.8 GHz using Computer Simulation Technology (CST) software. In order to achieve triple-band operation, the proposed antenna contains two branch elements, which act as an additional resonator....