In this paper, a W-band single-layer reflectarray antenna is proposed with the advantages of broadband and high aperture efficiency. A novel dual rotation-symmetry windmill element designed in W-band, which consists two layers copper patches printed on Rogers RT5880 substrate. Based analysis metasurface element, square 13.85λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http...

We propose a W-band circularly polarized reflectarray antenna in this article, which contains single-layer and linearly horn feed. To realize the proposed antenna, we designed novel multi-resonant element containing Rogers RT5880 substrate with copper patches printed on its both surfaces. Then, circular 12.25 λ0 (39.1 mm) aperture diameter was based element, whose center frequency is 94 GHz. fu...

Broadband wireless channels, where high data rates are transmitted, are extremely dispersive in nature. A fundamental challenge in the design of equalizers for the broadband case lies in reducing complexity. Broadband finite impulse response (FIR) beamformers employ a space-time antenna array which reduces the multipath delay spread to narrowband levels. The beamformers should additionally pres...

Microstrip Patch Antenna (MPA) is generally used in modern communication devices, and a large part of day-to-day communication is done through it. Study of literature of past few year shows that, the leading work on MPA is focused on designing compact sized broadband microstrip antenna. But inherently MPA have narrow bandwidth so to enhance bandwidth various techniques are engaged. This review ...

The effects of a two-dimensional periodic dielectric substrate on the performance of a microstripfed wide slot antenna are investigated. The microstrip-feed and wide slot is placed on opposite sides of the periodic dielectric substrate. Method of Moment calculations using volume integral equations is employed to determine the effects of the substrate. It is proposed that by introducing a period...

It has been demonstrated recently that it is possible to guide broadband terahertz pulses utilising a novel coaxial waveguide. This technique is hindered by the difficulty in exciting the radially polarised fundamental mode of the waveguide. To optimise mode matching, a novel radially symmetric photoconductive terahertz antenna is proposed. Using finite element method simulations and analytical...