Multibeam antenna using cavity‐based waveguide structure with extended hemispherical lens at millimetre wave

Multibeam Optical Signal Processing Array Antenna Using Optical Waveguide Arrays and Lens

Phased array antennas are expected to be effective for use in advanced wireless communications for mobile radio communication, wireless LAN, and satellite communication [1]. Recently, the application of photonics technology to microwave array antennas has been studied [2-5]. An optically controlled phased array antenna is very well-suited for fiber-optic microwave or millimeter-wave links. Opti...

Three-dimensional, ultra-wideband micromachined millimetre-wave hemispherical shell antenna: theoretical concept and calibration

This study presents a theoretical design study of a novel three-dimensional micromachined hemispherical shell antenna for ultra-wideband millimetre-wave imaging applications. The antenna is composed of a hemispherical metallic shell which is suspended on top of a high-resistivity silicon substrate using a thin silicon stem. The antenna exhibits two different operational modes and an exceptional...

Gain Enhancement of Microstrip Patch Antenna Using Hemispherical and Spherical Dielectric Lens Structure for WiMAX Applications

In this paper a study of the directive gain enhancement obtained using a dielectric lens placed in the near field of radiating elements is discussed. The design and results of a single element patch antenna along with hemispherical and spherical lens radiating in C-band are detailed. The design has been accomplished using the 3D finite-element-method (FEM) electromagnetic EM simulator, HFSS, is...

Design of Rotman Lens Antenna at Ku-Band Based on Substrate Integrated Technology

In this research work, a multibeam antenna which is a combination of a beamformer network (BFN) and a linear array antenna, has been designed. A Rotman lens has been chosen as beamformer network and Vivaldi antennas have been selected for constructing array antenna. The Substrate Integrated Waveguide (SIW) was used for implementing Rotman lens. After explanation the structure of Substrate integ...

Multi–Antenna Techniques for Millimetre–Wave Radios