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We present an ultrawideband dielectric rod antenna using a novel V-shaped twin-wire tapered transverse electromagnetic waveguide as the feed structure. The new feed taper allows for much wider bandwidth and resolves the pattern degradation in higher frequencies, which is typically encountered in endfire mode dielectric rod antennas. The three sections of the antenna geometry, namely, the feed taper,...
We present a low profile, wideband beam-steering antenna for continuous coverage of the K- and Ka-bands (18–40GHz). The array is based on the tightly coupled dipole principle and micro-electro mechanical systems (MEMS) phase shifters are integrated into each element for real-time beam forming. This topology leads to significant reduction in the size, weight, complexity, and cost of the phased array...
We present a tightly-coupled array antenna with integrated phase shifters with continuous coverage of K- and Ka-bands (18–40GHz). Micro-electro mechanical phase shifters were integrated with each antenna element to reduce power consumption, insertions-loss, size, cost and complexity of the beam-forming network. A 4×4 proof-of-concept array is designed, fabricated and measured at broadside. The major...
High-data-rate, beam-agile, low-profile, compact, and low-power transceiver systems are required to address the air-to-air and satellite communications (SATCOM) connectivity requirements of unmanned assets in the battlefield. To this end, the Ka-band offers a key advantage for smaller size and lower profile antennas over the traditional X- and Ku-band antennas and phased arrays. More importantly,...
Dielectric rod antennas (DRAs) are commonly used as reflector feeds and nearfield probes because they exhibit single broadside beam, good polarization purity, wide bandwidth and low scattering cross section. Particularly for multiple reflector feeds, low cross-coupling and polarization purity of DRAs make them very attractive. More importantly, DRAs provide ultra-wideband (UWB) operation with a simple...
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