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This paper presented a steerable series-fed phased array architecture using zero-degree tunable positive/negative-refractive-index (PRI/NRI) phase shifters. Using PRI/NRI phase shifters centered around the 0deg mark makes the array capable of steering its beam off broadside. The patch antennas of the array are moved off the centerline of the main feed line allowing for the inclusion of impedance transformers,...
Narrow frequency bandwidth antenna is a typical shortcoming for most of the communication devices. Thus, a single radiating element which able to have resonant frequencies covering from 780MHz till 3000MHz with at least VSWR of 2.5:1 is critically needed especially for a mission critical two-way portable radio. A novel patch antenna was designed to cater for this inadequacy. Using one radiating element...
The TUNNETT, a transit-time diode employing tunnel injection of electrons, was invented by Nishizawa and Watanabe in 1958. TUNNETT oscillators with patch antennas can be small, cheap and power-efficient, compared to opto-electrical terahertz sources. In this paper, TUNNETT oscillation with a patch antenna at 181 GHz is discussed.
This report presents the power pattern calculated by HFSS for the RF-microwave transmitted from a low profile inexpensive small patch antenna and scattered by a spherical object embedded within the confines of cuboid dissipative medium. The localization of the object causes the alteration of the radiation power pattern as well as the efficiency of the antenna. The calculation results indicate a patch...
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