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In this work, we propose a new method of gain and pattern characterization of circularly polarized (CP) antennas in the sub-mm-wave and terahertz band. Traditional methods can not be scaled in these bands due to waveguide ports and low margin for phase errors. The proposed method employs a phase-less and rotation-less measurement process using standard scattering objects. The method utilizes the double...
This paper introduces a feeding concept aimed at eliminating the backend (phase shifters) of traditional phased arrays. A goal is to make phased arrays simpler and less costly for satellite communications. Accordingly, we employ a traveling wave array (TWA) using a single feedline whose propagation constant is controlled via a single, small, and mechanical movement of a dielectric plunger to enable...
A microfluidically reconfigured, frequency tunable meandered dipole antenna is presented. Frequency tunability is achieved through a selectively metallized plate within the microfluidic channel acting as a parasitic RF shorting switch. The microfluidic channel is fabricated on polydimethylsiloxane (PDMS) and bonded onto the antenna substrate using a 12 µm thin low loss benzo-cyclobutene (BCB) layer...
We present a novel conformal, lightweight and load bearing spiral antenna on textiles for conformal applications. The antenna and its integrated planar balun were embroidered using a standard sewing machine with very thin (diameter=0.22mm) Liberator™ E-fibers. There fibers can achieve geometrical accuracy down to 0.3mm and even 0.1mm. This is a 3 fold geometrical accuracy improvement over previous...
We present a low-profile ultra wideband slot spiral antenna on a hybrid EBG-based reflecting cavity. A unique aspect of the proposed hybrid EBG impedance surfaces is its wide bandwidth performance via constructive interference of the ground plane with the antenna. This characteristic leads to highly improved axial ratio performance as compared to spirals on a metallic ground plane cavity. The proposed...
A concentric-arrayed radial line slot array (CA-RLSA) antenna is presented for THz (350 GHz) operation. This CA-RLSA antenna is optimized using particle swarm optimization (PSO) method. The PSO optimized THz antenna is demonstrated for five rows CA-RLSA. The final CA-RLSA antenna is delivering 24 dB gain, −44 dB cross-pol and has an axial ratio < 1.5 dB.
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