A Millimeter-Wave Multibeam Transparent Transmitarray Antenna at Ka-Band

Ka Band Transmit Antenna Array

Active antenna arrays working at higher frequencies result in higher packaging densities. The antenna array under consideration operates at about 30 GHz and will be installed in an aircraft. Commercially available power amplifiers at these frequencies have an efficiency of typically 20 %, which results in high amounts of dissipated heat for the required high radiated power. The dissipated power...

Reflectarray for K/ka-band Terminal Antenna

Different satellite systems have been defined to provide broadband communications and internet access in remote geographical areas in Ka band (20-30 GHz) [1-2], being the up-link at 30 GHz and the down-link at 20 GHz. Costeffective antennas are required for fixed and portable terminals in Ka-band. Conventional reflectors are a preferred option to maintain reduced costs. However, the different r...

A Millimeter-wave Slot-v Antenna

A new V-shaped slot antenna built on a dielectric substrate is presented. The antenna is a non-resonant, travelling-wave design, with a predicted impedance in the range from 50R t o €400. Calculations indicate that this antenna should have a gain of 15 dB with 3-dB beamwidths of loo in the H plane and 134' in the E plane. Pattern measurements at QOGHz support the theory. It should be possible t...

A Microstrip-coupled Slot-loop Antenna for Integrated Receivers in the Millimeter-wave Band

A square-loop slot antenna, printed at the back surface of an extended hemispherical lens, is examined as a candidate for ( ) millimeter-wä e mm-wa ̈e integrated-circuit Schottky-diode mixers. The loop slot is etched in a microwä e substrate, and coupled to a microstrip line section printed on the other side of the substrate. A Schottky barrier diode shunted to ground is the mixing de ̈ice. The i...

Design and Implementation of Quasi Planar Ka Band Array Antenna Based on Travelling Wave Structures