In this paper, a class of Bow-tie unit cell on FR4 substrate is designed and investigated to be used in implementing single-layer broadband Reflectarray Antenna (RA). the analyzing step, two different parameters (length angle) grounded Cross Bow-Tie (CBT) are varied obtain phase diagrams. Various degrees freedom CBT structure very helpful designing RA. antenna design procedure, an efficient syn...

Bow-tie antenna is widely used for pulse radiation, but the radiation efficiency is less than 30%. In this letter, a novel method is presented to improve the efficiency by exploiting the energy in end reflections, which are thought to be harmful and usually suppressed in the reported literatures. When the exciting pulse is bipolar and monocycle, it is indicated that, the end reflection can be u...

Recent breakthroughs in mobile phone technology are focusing on new techniques that allow the compact integration of dualband printed antennas into handsets with an increase in their inherent narrow bandwidth. In this letter, no el rectangular, circular, triangular, hexagonal, and bow-tie-shaped spur-line dual-band printed structures ha e been designed, measured, and compared. Although a second...

In this paper we propose the design of bow-tie antenna based on a simple modified transmission line model. The developed model is simple, accurate and takes into account all the antenna characteristics. The simulated antennas are designed to resonate at the frequencies 2.4 GHz and 8 GHz corresponding to RFID and Radars applications. To validate this last the obtained simulation results are comp...

The photonic crystal is investigated as a substrate material for planar antennas in the microwave and millimeter-wave bands. Experimental results are presented for a bow-tie antenna on a (111)-oriented facecentered-cubic photonic-crystal substrate with a band gap between approximately 13 and 16 GHz. When driven at 13.2 GHz, the antenna radiates predominantly into the air rather than into the su...

We report on the generation of extreme ultraviolet radiation utilizing the plasmonic field enhancement in arrays of bow-tie gold optical antennae. Furthermore, their suitability to support high-order harmonic generation is examined by means of finite-difference time-domain calculations and experiments. Particular emphasis is paid to the thermal properties, which become significant at the employ...

Arrays of subwavelength dipole bow-tie apertures are designed and characterized at terahertz frequencies. For an incident terahertz field perpendicular to the longer axis of the bow tie, a strong resonance enhancement, line narrowing, and a nonmonotonic frequency shift were observed with increasing length of the tapered bow-tie arms. Such characteristic behaviors primarily originate from locali...

The radiation characteristics of a monopole antenna that consists of one-half of a bow-tie dipole antenna, made of optically transparent conductive thin film and mounted above a ground plane, are investigated. The antenna is measured for several films with different sheet resistivities. It is found that the gain lowering of the antenna varies from 4.4 dB to 0.2 dB at 2.4 GHz and the efficiency ...