The irregularity has been very attractive to the antenna and packaging engineers. More specifically, the self-similarity has inspired many researchers to use them for broadband designs, due to the fact that a fractal antenna is a repeated shape in different scales, which can be interpreted as a multiscale (“multi-wavelength”) radiator. In addition to this, the space filling property seems to be...

According Tesla’s idea his magnifying transmitter has been designed not only to efficiently emit Hertzian waves, but also to transmit power at large distances. Analysis of Tesla's transmitter by using the wire antenna theory and reflection coefficient approximation is carried out in this work. The radiating part of the Tesla's transmitter is represented by an equivalent monopole antenna driven ...

Optical antennas can enhance the coupling between free-space propagating light and the localized excitation of nanoscopic light emitters or receivers, thus forming the basis of many nanophotonic applications. Their functionality relies on an understanding of the relationship between the geometric parameters and the resulting near-field antenna modes. Using scattering-type scanning near-field op...

<span lang="EN-US">An octa-band frequency-reconfigurable antenna (28×14×1.5 mm<sup>3</sup>) with a broad tuning range is shown. Antenna mode1 (4.31 GHz) works in one single-band mode and two dual-band modes 2 3 (i.e., 3.91 5.9 as well tri-band 4 3.09, 5.65, 7.92 based on the switching situation of antenna. Changing capacitance for frequency reconfigurability accomplished use l...

In this paper, the design and implementation of plasma antenna array with beam forming is discussed. The structure consists of a circular array of plasma tube enclosed in a unipolar UHF band monopole antenna. Beam forming is possible by stimulated plasma tubes. The combination of the above antenna with plasma excitation controller makes a beam forming smart antenna. An experimental model in UHF...

This paper presents measured data at 2.45 GHz from a narrowband multiple-input multiple-output (MIMO) channel probe in an indoor office/laboratory environment. The measured transfer matrices are used in a study of the statistical behavior of the channel capacity. The effect of antenna element polarization and array size are highlighted. The data is also used to validate a simple statistically b...

A proper antenna to couple to a microstrip Microwave Kinetic Inductance Detector (MKID) is designed and simulated. A twin-slot microstrip-fed inline antenna is designed for frequency band of 600-720~GHz integrated with an elliptical lens and coupled to the MKID. A systematic design procedure for design of such antenna with microstrip inline feeding is presented. Whole structure of lens and twin...